diff options
Diffstat (limited to 'picosoc')
| -rw-r--r-- | picosoc/.gitignore | 29 | ||||
| -rw-r--r-- | picosoc/Makefile | 123 | ||||
| -rw-r--r-- | picosoc/README.md | 114 | ||||
| -rw-r--r-- | picosoc/firmware.c | 770 | ||||
| -rw-r--r-- | picosoc/hx8kdemo.core | 35 | ||||
| -rw-r--r-- | picosoc/hx8kdemo.pcf | 40 | ||||
| -rw-r--r-- | picosoc/hx8kdemo.v | 139 | ||||
| -rw-r--r-- | picosoc/hx8kdemo_tb.v | 108 | ||||
| -rw-r--r-- | picosoc/ice40up5k_spram.v | 91 | ||||
| -rw-r--r-- | picosoc/icebreaker.core | 36 | ||||
| -rw-r--r-- | picosoc/icebreaker.pcf | 25 | ||||
| -rw-r--r-- | picosoc/icebreaker.v | 151 | ||||
| -rw-r--r-- | picosoc/icebreaker_tb.v | 122 | ||||
| -rw-r--r-- | picosoc/overview.svg | 757 | ||||
| -rw-r--r-- | picosoc/performance.png | bin | 62502 -> 0 bytes | |||
| -rw-r--r-- | picosoc/performance.py | 165 | ||||
| -rw-r--r-- | picosoc/picosoc.core | 27 | ||||
| -rw-r--r-- | picosoc/picosoc.v | 262 | ||||
| -rw-r--r-- | picosoc/sections.lds | 71 | ||||
| -rw-r--r-- | picosoc/simpleuart.v | 137 | ||||
| -rw-r--r-- | picosoc/spiflash.core | 24 | ||||
| -rw-r--r-- | picosoc/spiflash.v | 409 | ||||
| -rw-r--r-- | picosoc/spiflash_tb.v | 366 | ||||
| -rw-r--r-- | picosoc/spimemio.v | 579 | ||||
| -rw-r--r-- | picosoc/start.s | 159 |
25 files changed, 0 insertions, 4739 deletions
diff --git a/picosoc/.gitignore b/picosoc/.gitignore deleted file mode 100644 index 4ac8239..0000000 --- a/picosoc/.gitignore +++ /dev/null @@ -1,29 +0,0 @@ -/spiflash_tb.vcd -/spiflash_tb.vvp -/hx8kdemo.asc -/hx8kdemo.bin -/hx8kdemo.json -/hx8kdemo.log -/hx8kdemo.rpt -/hx8kdemo_syn.v -/hx8kdemo_syn_tb.vvp -/hx8kdemo_tb.vvp -/hx8kdemo_fw.elf -/hx8kdemo_fw.hex -/hx8kdemo_fw.bin -/hx8kdemo_sections.lds -/icebreaker.asc -/icebreaker.bin -/icebreaker.json -/icebreaker.log -/icebreaker.rpt -/icebreaker_syn.v -/icebreaker_syn_tb.vvp -/icebreaker_tb.vvp -/icebreaker_fw.elf -/icebreaker_fw.hex -/icebreaker_fw.bin -/icebreaker_sections.lds -/testbench.vcd -/cmos.log - diff --git a/picosoc/Makefile b/picosoc/Makefile deleted file mode 100644 index 291a12d..0000000 --- a/picosoc/Makefile +++ /dev/null @@ -1,123 +0,0 @@ - -CROSS=riscv32-unknown-elf- -CFLAGS= - -# ---- iCE40 HX8K Breakout Board ---- - -hx8ksim: hx8kdemo_tb.vvp hx8kdemo_fw.hex - vvp -N $< +firmware=hx8kdemo_fw.hex - -hx8ksynsim: hx8kdemo_syn_tb.vvp hx8kdemo_fw.hex - vvp -N $< +firmware=hx8kdemo_fw.hex - -hx8kdemo.json: hx8kdemo.v spimemio.v simpleuart.v picosoc.v ../picorv32.v - yosys -ql hx8kdemo.log -p 'synth_ice40 -top hx8kdemo -json hx8kdemo.json' $^ - -hx8kdemo_tb.vvp: hx8kdemo_tb.v hx8kdemo.v spimemio.v simpleuart.v picosoc.v ../picorv32.v spiflash.v - iverilog -s testbench -o $@ $^ `yosys-config --datdir/ice40/cells_sim.v` -DNO_ICE40_DEFAULT_ASSIGNMENTS - -hx8kdemo_syn_tb.vvp: hx8kdemo_tb.v hx8kdemo_syn.v spiflash.v - iverilog -s testbench -o $@ $^ `yosys-config --datdir/ice40/cells_sim.v` -DNO_ICE40_DEFAULT_ASSIGNMENTS - -hx8kdemo_syn.v: hx8kdemo.json - yosys -p 'read_json hx8kdemo.json; write_verilog hx8kdemo_syn.v' - -hx8kdemo.asc: hx8kdemo.pcf hx8kdemo.json - nextpnr-ice40 --hx8k --package ct256 --asc hx8kdemo.asc --json hx8kdemo.json --pcf hx8kdemo.pcf - -hx8kdemo.bin: hx8kdemo.asc - icetime -d hx8k -c 12 -mtr hx8kdemo.rpt hx8kdemo.asc - icepack hx8kdemo.asc hx8kdemo.bin - -hx8kprog: hx8kdemo.bin hx8kdemo_fw.bin - iceprog hx8kdemo.bin - iceprog -o 1M hx8kdemo_fw.bin - -hx8kprog_fw: hx8kdemo_fw.bin - iceprog -o 1M hx8kdemo_fw.bin - -hx8kdemo_sections.lds: sections.lds - $(CROSS)cpp -P -DHX8KDEMO -o $@ $^ - -hx8kdemo_fw.elf: hx8kdemo_sections.lds start.s firmware.c - $(CROSS)gcc $(CFLAGS) -DHX8KDEMO -mabi=ilp32 -march=rv32imc -Wl,--build-id=none,-Bstatic,-T,hx8kdemo_sections.lds,--strip-debug -ffreestanding -nostdlib -o hx8kdemo_fw.elf start.s firmware.c - -hx8kdemo_fw.hex: hx8kdemo_fw.elf - $(CROSS)objcopy -O verilog hx8kdemo_fw.elf hx8kdemo_fw.hex - -hx8kdemo_fw.bin: hx8kdemo_fw.elf - $(CROSS)objcopy -O binary hx8kdemo_fw.elf hx8kdemo_fw.bin - -# ---- iCE40 IceBreaker Board ---- - -icebsim: icebreaker_tb.vvp icebreaker_fw.hex - vvp -N $< +firmware=icebreaker_fw.hex - -icebsynsim: icebreaker_syn_tb.vvp icebreaker_fw.hex - vvp -N $< +firmware=icebreaker_fw.hex - -icebreaker.json: icebreaker.v ice40up5k_spram.v spimemio.v simpleuart.v picosoc.v ../picorv32.v - yosys -ql icebreaker.log -p 'synth_ice40 -dsp -top icebreaker -json icebreaker.json' $^ - -icebreaker_tb.vvp: icebreaker_tb.v icebreaker.v ice40up5k_spram.v spimemio.v simpleuart.v picosoc.v ../picorv32.v spiflash.v - iverilog -s testbench -o $@ $^ `yosys-config --datdir/ice40/cells_sim.v` -DNO_ICE40_DEFAULT_ASSIGNMENTS - -icebreaker_syn_tb.vvp: icebreaker_tb.v icebreaker_syn.v spiflash.v - iverilog -s testbench -o $@ $^ `yosys-config --datdir/ice40/cells_sim.v` -DNO_ICE40_DEFAULT_ASSIGNMENTS - -icebreaker_syn.v: icebreaker.json - yosys -p 'read_json icebreaker.json; write_verilog icebreaker_syn.v' - -icebreaker.asc: icebreaker.pcf icebreaker.json - nextpnr-ice40 --freq 13 --up5k --package sg48 --asc icebreaker.asc --pcf icebreaker.pcf --json icebreaker.json - -icebreaker.bin: icebreaker.asc - icetime -d up5k -c 12 -mtr icebreaker.rpt icebreaker.asc - icepack icebreaker.asc icebreaker.bin - -icebprog: icebreaker.bin icebreaker_fw.bin - iceprog icebreaker.bin - iceprog -o 1M icebreaker_fw.bin - -icebprog_fw: icebreaker_fw.bin - iceprog -o 1M icebreaker_fw.bin - -icebreaker_sections.lds: sections.lds - $(CROSS)cpp -P -DICEBREAKER -o $@ $^ - -icebreaker_fw.elf: icebreaker_sections.lds start.s firmware.c - $(CROSS)gcc $(CFLAGS) -DICEBREAKER -mabi=ilp32 -march=rv32ic -Wl,-Bstatic,-T,icebreaker_sections.lds,--strip-debug -ffreestanding -nostdlib -o icebreaker_fw.elf start.s firmware.c - -icebreaker_fw.hex: icebreaker_fw.elf - $(CROSS)objcopy -O verilog icebreaker_fw.elf icebreaker_fw.hex - -icebreaker_fw.bin: icebreaker_fw.elf - $(CROSS)objcopy -O binary icebreaker_fw.elf icebreaker_fw.bin - -# ---- Testbench for SPI Flash Model ---- - -spiflash_tb: spiflash_tb.vvp icebreaker_fw.hex - vvp -N $< +firmware=icebreaker_fw.hex - -spiflash_tb.vvp: spiflash.v spiflash_tb.v - iverilog -s testbench -o $@ $^ - -# ---- ASIC Synthesis Tests ---- - -cmos.log: spimemio.v simpleuart.v picosoc.v ../picorv32.v - yosys -l cmos.log -p 'synth -top picosoc; abc -g cmos2; opt -fast; stat' $^ - -# ---- Clean ---- - -clean: - rm -f testbench.vvp testbench.vcd spiflash_tb.vvp spiflash_tb.vcd - rm -f hx8kdemo_fw.elf hx8kdemo_fw.hex hx8kdemo_fw.bin cmos.log - rm -f icebreaker_fw.elf icebreaker_fw.hex icebreaker_fw.bin - rm -f hx8kdemo.blif hx8kdemo.log hx8kdemo.asc hx8kdemo.rpt hx8kdemo.bin - rm -f hx8kdemo_syn.v hx8kdemo_syn_tb.vvp hx8kdemo_tb.vvp - rm -f icebreaker.json icebreaker.log icebreaker.asc icebreaker.rpt icebreaker.bin - rm -f icebreaker_syn.v icebreaker_syn_tb.vvp icebreaker_tb.vvp - -.PHONY: spiflash_tb clean -.PHONY: hx8kprog hx8kprog_fw hx8ksim hx8ksynsim -.PHONY: icebprog icebprog_fw icebsim icebsynsim diff --git a/picosoc/README.md b/picosoc/README.md deleted file mode 100644 index 1708709..0000000 --- a/picosoc/README.md +++ /dev/null @@ -1,114 +0,0 @@ - -PicoSoC - A simple example SoC using PicoRV32 -============================================= - - - -This is a simple PicoRV32 example design that can run code directly from an SPI -flash chip. It can be used as a turn-key solution for simple control tasks in -ASIC and FPGA designs. - -An example implementation targeting the Lattice iCE40-HX8K Breakout Board is -included. - -The flash is mapped to the memory regions starting at 0x00000000 and -0x01000000, with the SRAM overlayed for the mapping at 0x00000000. The SRAM -is just a small scratchpad memory (default 256 words, i.e. 1 kB). - -The reset vector is set to 0x00100000, i.e. at 1MB into in the flash memory. - -See the included demo firmware and linker script for how to build a firmware -image for this system. - -Run `make hx8ksim` or `make icebsim` to run the test bench (and create `testbench.vcd`). - -Run `make hx8kprog` to build the configuration bit-stream and firmware images -and upload them to a connected iCE40-HX8K Breakout Board. - -Run `make icebprog` to build the configuration bit-stream and firmware images -and upload them to a connected iCEBreaker Board. - -| File | Description | -| ----------------------------------- | --------------------------------------------------------------- | -| [picosoc.v](picosoc.v) | Top-level PicoSoC Verilog module | -| [spimemio.v](spimemio.v) | Memory controller that interfaces to external SPI flash | -| [simpleuart.v](simpleuart.v) | Simple UART core connected directly to SoC TX/RX lines | -| [start.s](start.s) | Assembler source for firmware.hex/firmware.bin | -| [firmware.c](firmware.c) | C source for firmware.hex/firmware.bin | -| [sections.lds](sections.lds) | Linker script for firmware.hex/firmware.bin | -| [hx8kdemo.v](hx8kdemo.v) | FPGA-based example implementation on iCE40-HX8K Breakout Board | -| [hx8kdemo.pcf](hx8kdemo.pcf) | Pin constraints for implementation on iCE40-HX8K Breakout Board | -| [hx8kdemo\_tb.v](hx8kdemo_tb.v) | Testbench for implementation on iCE40-HX8K Breakout Board | -| [icebreaker.v](icebreaker.v) | FPGA-based example implementation on iCEBreaker Board | -| [icebreaker.pcf](icebreaker.pcf) | Pin constraints for implementation on iCEBreaker Board | -| [icebreaker\_tb.v](icebreaker_tb.v) | Testbench for implementation on iCEBreaker Board | - -### Memory map: - -| Address Range | Description | -| ------------------------ | --------------------------------------- | -| 0x00000000 .. 0x00FFFFFF | Internal SRAM | -| 0x01000000 .. 0x01FFFFFF | External Serial Flash | -| 0x02000000 .. 0x02000003 | SPI Flash Controller Config Register | -| 0x02000004 .. 0x02000007 | UART Clock Divider Register | -| 0x02000008 .. 0x0200000B | UART Send/Recv Data Register | -| 0x03000000 .. 0xFFFFFFFF | Memory mapped user peripherals | - -Reading from the addresses in the internal SRAM region beyond the end of the -physical SRAM will read from the corresponding addresses in serial flash. - -Reading from the UART Send/Recv Data Register will return the last received -byte, or -1 (all 32 bits set) when the receive buffer is empty. - -The UART Clock Divider Register must be set to the system clock frequency -divided by the baud rate. - -The example design (hx8kdemo.v) has the 8 LEDs on the iCE40-HX8K Breakout Board -mapped to the low byte of the 32 bit word at address 0x03000000. - -### SPI Flash Controller Config Register: - -| Bit(s) | Description | -| -----: | --------------------------------------------------------- | -| 31 | MEMIO Enable (reset=1, set to 0 to bit bang SPI commands) | -| 30:23 | Reserved (read 0) | -| 22 | DDR Enable bit (reset=0) | -| 21 | QSPI Enable bit (reset=0) | -| 20 | CRM Enable bit (reset=0) | -| 19:16 | Read latency (dummy) cycles (reset=8) | -| 15:12 | Reserved (read 0) | -| 11:8 | IO Output enable bits in bit bang mode | -| 7:6 | Reserved (read 0) | -| 5 | Chip select (CS) line in bit bang mode | -| 4 | Serial clock line in bit bang mode | -| 3:0 | IO data bits in bit bang mode | - -The following settings for CRM/DDR/QSPI modes are valid: - -| CRM | QSPI | DDR | Read Command Byte | Mode Byte | -| :-: | :--: | :-: | :-------------------- | :-------: | -| 0 | 0 | 0 | 03h Read | N/A | -| 0 | 0 | 1 | BBh Dual I/O Read | FFh | -| 1 | 0 | 1 | BBh Dual I/O Read | A5h | -| 0 | 1 | 0 | EBh Quad I/O Read | FFh | -| 1 | 1 | 0 | EBh Quad I/O Read | A5h | -| 0 | 1 | 1 | EDh DDR Quad I/O Read | FFh | -| 1 | 1 | 1 | EDh DDR Quad I/O Read | A5h | - -The following plot visualizes the relative performance of the different configurations: - - - -Consult the datasheet for your SPI flash to learn which configurations are supported -by the chip and what the maximum clock frequencies are for each configuration. - -For Quad I/O mode the QUAD flag in CR1V must be set before enabling Quad I/O in the -SPI master. Either set it by writing the corresponding bit in CR1NV once, or by writing -it from your device firmware at every bootup. (See `set_flash_qspi_flag()` in -`firmware.c` for an example for the latter.) - -Note that some changes to the Lattice iCE40-HX8K Breakout Board are required to support -the faster configurations: (1) The flash chip must be replaced with one that supports the -faster read commands and (2) the IO2 and IO3 pins on the flash chip must be connected to -the FPGA IO pins T9 and T8 (near the center of J3). - diff --git a/picosoc/firmware.c b/picosoc/firmware.c deleted file mode 100644 index aadf31b..0000000 --- a/picosoc/firmware.c +++ /dev/null @@ -1,770 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -#include <stdint.h> -#include <stdbool.h> - -#ifdef ICEBREAKER -# define MEM_TOTAL 0x20000 /* 128 KB */ -#elif HX8KDEMO -# define MEM_TOTAL 0x200 /* 2 KB */ -#else -# error "Set -DICEBREAKER or -DHX8KDEMO when compiling firmware.c" -#endif - -// a pointer to this is a null pointer, but the compiler does not -// know that because "sram" is a linker symbol from sections.lds. -extern uint32_t sram; - -#define reg_spictrl (*(volatile uint32_t*)0x02000000) -#define reg_uart_clkdiv (*(volatile uint32_t*)0x02000004) -#define reg_uart_data (*(volatile uint32_t*)0x02000008) -#define reg_leds (*(volatile uint32_t*)0x03000000) - -// -------------------------------------------------------- - -extern uint32_t flashio_worker_begin; -extern uint32_t flashio_worker_end; - -void flashio(uint8_t *data, int len, uint8_t wrencmd) -{ - uint32_t func[&flashio_worker_end - &flashio_worker_begin]; - - uint32_t *src_ptr = &flashio_worker_begin; - uint32_t *dst_ptr = func; - - while (src_ptr != &flashio_worker_end) - *(dst_ptr++) = *(src_ptr++); - - ((void(*)(uint8_t*, uint32_t, uint32_t))func)(data, len, wrencmd); -} - -#ifdef HX8KDEMO -void set_flash_qspi_flag() -{ - uint8_t buffer[8]; - uint32_t addr_cr1v = 0x800002; - - // Read Any Register (RDAR 65h) - buffer[0] = 0x65; - buffer[1] = addr_cr1v >> 16; - buffer[2] = addr_cr1v >> 8; - buffer[3] = addr_cr1v; - buffer[4] = 0; // dummy - buffer[5] = 0; // rdata - flashio(buffer, 6, 0); - uint8_t cr1v = buffer[5]; - - // Write Enable (WREN 06h) + Write Any Register (WRAR 71h) - buffer[0] = 0x71; - buffer[1] = addr_cr1v >> 16; - buffer[2] = addr_cr1v >> 8; - buffer[3] = addr_cr1v; - buffer[4] = cr1v | 2; // Enable QSPI - flashio(buffer, 5, 0x06); -} - -void set_flash_latency(uint8_t value) -{ - reg_spictrl = (reg_spictrl & ~0x007f0000) | ((value & 15) << 16); - - uint32_t addr = 0x800004; - uint8_t buffer_wr[5] = {0x71, addr >> 16, addr >> 8, addr, 0x70 | value}; - flashio(buffer_wr, 5, 0x06); -} - -void set_flash_mode_spi() -{ - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00000000; -} - -void set_flash_mode_dual() -{ - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00400000; -} - -void set_flash_mode_quad() -{ - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00200000; -} - -void set_flash_mode_qddr() -{ - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00600000; -} -#endif - -#ifdef ICEBREAKER -void set_flash_qspi_flag() -{ - uint8_t buffer[8]; - - // Read Configuration Registers (RDCR1 35h) - buffer[0] = 0x35; - buffer[1] = 0x00; // rdata - flashio(buffer, 2, 0); - uint8_t sr2 = buffer[1]; - - // Write Enable Volatile (50h) + Write Status Register 2 (31h) - buffer[0] = 0x31; - buffer[1] = sr2 | 2; // Enable QSPI - flashio(buffer, 2, 0x50); -} - -void set_flash_mode_spi() -{ - reg_spictrl = (reg_spictrl & ~0x007f0000) | 0x00000000; -} - -void set_flash_mode_dual() -{ - reg_spictrl = (reg_spictrl & ~0x007f0000) | 0x00400000; -} - -void set_flash_mode_quad() -{ - reg_spictrl = (reg_spictrl & ~0x007f0000) | 0x00240000; -} - -void set_flash_mode_qddr() -{ - reg_spictrl = (reg_spictrl & ~0x007f0000) | 0x00670000; -} - -void enable_flash_crm() -{ - reg_spictrl |= 0x00100000; -} -#endif - -// -------------------------------------------------------- - -void putchar(char c) -{ - if (c == '\n') - putchar('\r'); - reg_uart_data = c; -} - -void print(const char *p) -{ - while (*p) - putchar(*(p++)); -} - -void print_hex(uint32_t v, int digits) -{ - for (int i = 7; i >= 0; i--) { - char c = "0123456789abcdef"[(v >> (4*i)) & 15]; - if (c == '0' && i >= digits) continue; - putchar(c); - digits = i; - } -} - -void print_dec(uint32_t v) -{ - if (v >= 1000) { - print(">=1000"); - return; - } - - if (v >= 900) { putchar('9'); v -= 900; } - else if (v >= 800) { putchar('8'); v -= 800; } - else if (v >= 700) { putchar('7'); v -= 700; } - else if (v >= 600) { putchar('6'); v -= 600; } - else if (v >= 500) { putchar('5'); v -= 500; } - else if (v >= 400) { putchar('4'); v -= 400; } - else if (v >= 300) { putchar('3'); v -= 300; } - else if (v >= 200) { putchar('2'); v -= 200; } - else if (v >= 100) { putchar('1'); v -= 100; } - - if (v >= 90) { putchar('9'); v -= 90; } - else if (v >= 80) { putchar('8'); v -= 80; } - else if (v >= 70) { putchar('7'); v -= 70; } - else if (v >= 60) { putchar('6'); v -= 60; } - else if (v >= 50) { putchar('5'); v -= 50; } - else if (v >= 40) { putchar('4'); v -= 40; } - else if (v >= 30) { putchar('3'); v -= 30; } - else if (v >= 20) { putchar('2'); v -= 20; } - else if (v >= 10) { putchar('1'); v -= 10; } - - if (v >= 9) { putchar('9'); v -= 9; } - else if (v >= 8) { putchar('8'); v -= 8; } - else if (v >= 7) { putchar('7'); v -= 7; } - else if (v >= 6) { putchar('6'); v -= 6; } - else if (v >= 5) { putchar('5'); v -= 5; } - else if (v >= 4) { putchar('4'); v -= 4; } - else if (v >= 3) { putchar('3'); v -= 3; } - else if (v >= 2) { putchar('2'); v -= 2; } - else if (v >= 1) { putchar('1'); v -= 1; } - else putchar('0'); -} - -char getchar_prompt(char *prompt) -{ - int32_t c = -1; - - uint32_t cycles_begin, cycles_now, cycles; - __asm__ volatile ("rdcycle %0" : "=r"(cycles_begin)); - - reg_leds = ~0; - - if (prompt) - print(prompt); - - while (c == -1) { - __asm__ volatile ("rdcycle %0" : "=r"(cycles_now)); - cycles = cycles_now - cycles_begin; - if (cycles > 12000000) { - if (prompt) - print(prompt); - cycles_begin = cycles_now; - reg_leds = ~reg_leds; - } - c = reg_uart_data; - } - - reg_leds = 0; - return c; -} - -char getchar() -{ - return getchar_prompt(0); -} - -void cmd_print_spi_state() -{ - print("SPI State:\n"); - - print(" LATENCY "); - print_dec((reg_spictrl >> 16) & 15); - print("\n"); - - print(" DDR "); - if ((reg_spictrl & (1 << 22)) != 0) - print("ON\n"); - else - print("OFF\n"); - - print(" QSPI "); - if ((reg_spictrl & (1 << 21)) != 0) - print("ON\n"); - else - print("OFF\n"); - - print(" CRM "); - if ((reg_spictrl & (1 << 20)) != 0) - print("ON\n"); - else - print("OFF\n"); -} - -uint32_t xorshift32(uint32_t *state) -{ - /* Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs" */ - uint32_t x = *state; - x ^= x << 13; - x ^= x >> 17; - x ^= x << 5; - *state = x; - - return x; -} - -void cmd_memtest() -{ - int cyc_count = 5; - int stride = 256; - uint32_t state; - - volatile uint32_t *base_word = (uint32_t *) 0; - volatile uint8_t *base_byte = (uint8_t *) 0; - - print("Running memtest "); - - // Walk in stride increments, word access - for (int i = 1; i <= cyc_count; i++) { - state = i; - - for (int word = 0; word < MEM_TOTAL / sizeof(int); word += stride) { - *(base_word + word) = xorshift32(&state); - } - - state = i; - - for (int word = 0; word < MEM_TOTAL / sizeof(int); word += stride) { - if (*(base_word + word) != xorshift32(&state)) { - print(" ***FAILED WORD*** at "); - print_hex(4*word, 4); - print("\n"); - return; - } - } - - print("."); - } - - // Byte access - for (int byte = 0; byte < 128; byte++) { - *(base_byte + byte) = (uint8_t) byte; - } - - for (int byte = 0; byte < 128; byte++) { - if (*(base_byte + byte) != (uint8_t) byte) { - print(" ***FAILED BYTE*** at "); - print_hex(byte, 4); - print("\n"); - return; - } - } - - print(" passed\n"); -} - -// -------------------------------------------------------- - -void cmd_read_flash_id() -{ - uint8_t buffer[17] = { 0x9F, /* zeros */ }; - flashio(buffer, 17, 0); - - for (int i = 1; i <= 16; i++) { - putchar(' '); - print_hex(buffer[i], 2); - } - putchar('\n'); -} - -// -------------------------------------------------------- - -#ifdef HX8KDEMO -uint8_t cmd_read_flash_regs_print(uint32_t addr, const char *name) -{ - set_flash_latency(8); - - uint8_t buffer[6] = {0x65, addr >> 16, addr >> 8, addr, 0, 0}; - flashio(buffer, 6, 0); - - print("0x"); - print_hex(addr, 6); - print(" "); - print(name); - print(" 0x"); - print_hex(buffer[5], 2); - print("\n"); - - return buffer[5]; -} - -void cmd_read_flash_regs() -{ - print("\n"); - uint8_t sr1v = cmd_read_flash_regs_print(0x800000, "SR1V"); - uint8_t sr2v = cmd_read_flash_regs_print(0x800001, "SR2V"); - uint8_t cr1v = cmd_read_flash_regs_print(0x800002, "CR1V"); - uint8_t cr2v = cmd_read_flash_regs_print(0x800003, "CR2V"); - uint8_t cr3v = cmd_read_flash_regs_print(0x800004, "CR3V"); - uint8_t vdlp = cmd_read_flash_regs_print(0x800005, "VDLP"); -} -#endif - -#ifdef ICEBREAKER -uint8_t cmd_read_flash_reg(uint8_t cmd) -{ - uint8_t buffer[2] = {cmd, 0}; - flashio(buffer, 2, 0); - return buffer[1]; -} - -void print_reg_bit(int val, const char *name) -{ - for (int i = 0; i < 12; i++) { - if (*name == 0) - putchar(' '); - else - putchar(*(name++)); - } - - putchar(val ? '1' : '0'); - putchar('\n'); -} - -void cmd_read_flash_regs() -{ - putchar('\n'); - - uint8_t sr1 = cmd_read_flash_reg(0x05); - uint8_t sr2 = cmd_read_flash_reg(0x35); - uint8_t sr3 = cmd_read_flash_reg(0x15); - - print_reg_bit(sr1 & 0x01, "S0 (BUSY)"); - print_reg_bit(sr1 & 0x02, "S1 (WEL)"); - print_reg_bit(sr1 & 0x04, "S2 (BP0)"); - print_reg_bit(sr1 & 0x08, "S3 (BP1)"); - print_reg_bit(sr1 & 0x10, "S4 (BP2)"); - print_reg_bit(sr1 & 0x20, "S5 (TB)"); - print_reg_bit(sr1 & 0x40, "S6 (SEC)"); - print_reg_bit(sr1 & 0x80, "S7 (SRP)"); - putchar('\n'); - - print_reg_bit(sr2 & 0x01, "S8 (SRL)"); - print_reg_bit(sr2 & 0x02, "S9 (QE)"); - print_reg_bit(sr2 & 0x04, "S10 ----"); - print_reg_bit(sr2 & 0x08, "S11 (LB1)"); - print_reg_bit(sr2 & 0x10, "S12 (LB2)"); - print_reg_bit(sr2 & 0x20, "S13 (LB3)"); - print_reg_bit(sr2 & 0x40, "S14 (CMP)"); - print_reg_bit(sr2 & 0x80, "S15 (SUS)"); - putchar('\n'); - - print_reg_bit(sr3 & 0x01, "S16 ----"); - print_reg_bit(sr3 & 0x02, "S17 ----"); - print_reg_bit(sr3 & 0x04, "S18 (WPS)"); - print_reg_bit(sr3 & 0x08, "S19 ----"); - print_reg_bit(sr3 & 0x10, "S20 ----"); - print_reg_bit(sr3 & 0x20, "S21 (DRV0)"); - print_reg_bit(sr3 & 0x40, "S22 (DRV1)"); - print_reg_bit(sr3 & 0x80, "S23 (HOLD)"); - putchar('\n'); -} -#endif - -// -------------------------------------------------------- - -uint32_t cmd_benchmark(bool verbose, uint32_t *instns_p) -{ - uint8_t data[256]; - uint32_t *words = (void*)data; - - uint32_t x32 = 314159265; - - uint32_t cycles_begin, cycles_end; - uint32_t instns_begin, instns_end; - __asm__ volatile ("rdcycle %0" : "=r"(cycles_begin)); - __asm__ volatile ("rdinstret %0" : "=r"(instns_begin)); - - for (int i = 0; i < 20; i++) - { - for (int k = 0; k < 256; k++) - { - x32 ^= x32 << 13; - x32 ^= x32 >> 17; - x32 ^= x32 << 5; - data[k] = x32; - } - - for (int k = 0, p = 0; k < 256; k++) - { - if (data[k]) - data[p++] = k; - } - - for (int k = 0, p = 0; k < 64; k++) - { - x32 = x32 ^ words[k]; - } - } - - __asm__ volatile ("rdcycle %0" : "=r"(cycles_end)); - __asm__ volatile ("rdinstret %0" : "=r"(instns_end)); - - if (verbose) - { - print("Cycles: 0x"); - print_hex(cycles_end - cycles_begin, 8); - putchar('\n'); - - print("Instns: 0x"); - print_hex(instns_end - instns_begin, 8); - putchar('\n'); - - print("Chksum: 0x"); - print_hex(x32, 8); - putchar('\n'); - } - - if (instns_p) - *instns_p = instns_end - instns_begin; - - return cycles_end - cycles_begin; -} - -// -------------------------------------------------------- - -#ifdef HX8KDEMO -void cmd_benchmark_all() -{ - uint32_t instns = 0; - - print("default "); - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00000000; - print(": "); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - - for (int i = 8; i > 0; i--) - { - print("dspi-"); - print_dec(i); - print(" "); - - set_flash_latency(i); - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00400000; - - print(": "); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - } - - for (int i = 8; i > 0; i--) - { - print("dspi-crm-"); - print_dec(i); - print(" "); - - set_flash_latency(i); - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00500000; - - print(": "); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - } - - for (int i = 8; i > 0; i--) - { - print("qspi-"); - print_dec(i); - print(" "); - - set_flash_latency(i); - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00200000; - - print(": "); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - } - - for (int i = 8; i > 0; i--) - { - print("qspi-crm-"); - print_dec(i); - print(" "); - - set_flash_latency(i); - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00300000; - - print(": "); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - } - - for (int i = 8; i > 0; i--) - { - print("qspi-ddr-"); - print_dec(i); - print(" "); - - set_flash_latency(i); - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00600000; - - print(": "); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - } - - for (int i = 8; i > 0; i--) - { - print("qspi-ddr-crm-"); - print_dec(i); - print(" "); - - set_flash_latency(i); - reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00700000; - - print(": "); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - } - - print("instns : "); - print_hex(instns, 8); - putchar('\n'); -} -#endif - -#ifdef ICEBREAKER -void cmd_benchmark_all() -{ - uint32_t instns = 0; - - print("default "); - set_flash_mode_spi(); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - - print("dual "); - set_flash_mode_dual(); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - - // print("dual-crm "); - // enable_flash_crm(); - // print_hex(cmd_benchmark(false, &instns), 8); - // putchar('\n'); - - print("quad "); - set_flash_mode_quad(); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - - print("quad-crm "); - enable_flash_crm(); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - - print("qddr "); - set_flash_mode_qddr(); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - - print("qddr-crm "); - enable_flash_crm(); - print_hex(cmd_benchmark(false, &instns), 8); - putchar('\n'); - -} -#endif - -void cmd_echo() -{ - print("Return to menu by sending '!'\n\n"); - char c; - while ((c = getchar()) != '!') - putchar(c); -} - -// -------------------------------------------------------- - -void main() -{ - reg_leds = 31; - reg_uart_clkdiv = 104; - print("Booting..\n"); - - reg_leds = 63; - set_flash_qspi_flag(); - - reg_leds = 127; - while (getchar_prompt("Press ENTER to continue..\n") != '\r') { /* wait */ } - - print("\n"); - print(" ____ _ ____ ____\n"); - print(" | _ \\(_) ___ ___/ ___| ___ / ___|\n"); - print(" | |_) | |/ __/ _ \\___ \\ / _ \\| |\n"); - print(" | __/| | (_| (_) |__) | (_) | |___\n"); - print(" |_| |_|\\___\\___/____/ \\___/ \\____|\n"); - print("\n"); - - print("Total memory: "); - print_dec(MEM_TOTAL / 1024); - print(" KiB\n"); - print("\n"); - - //cmd_memtest(); // test overwrites bss and data memory - print("\n"); - - cmd_print_spi_state(); - print("\n"); - - while (1) - { - print("\n"); - - print("Select an action:\n"); - print("\n"); - print(" [1] Read SPI Flash ID\n"); - print(" [2] Read SPI Config Regs\n"); - print(" [3] Switch to default mode\n"); - print(" [4] Switch to Dual I/O mode\n"); - print(" [5] Switch to Quad I/O mode\n"); - print(" [6] Switch to Quad DDR mode\n"); - print(" [7] Toggle continuous read mode\n"); - print(" [9] Run simplistic benchmark\n"); - print(" [0] Benchmark all configs\n"); - print(" [M] Run Memtest\n"); - print(" [S] Print SPI state\n"); - print(" [e] Echo UART\n"); - print("\n"); - - for (int rep = 10; rep > 0; rep--) - { - print("Command> "); - char cmd = getchar(); - if (cmd > 32 && cmd < 127) - putchar(cmd); - print("\n"); - - switch (cmd) - { - case '1': - cmd_read_flash_id(); - break; - case '2': - cmd_read_flash_regs(); - break; - case '3': - set_flash_mode_spi(); - break; - case '4': - set_flash_mode_dual(); - break; - case '5': - set_flash_mode_quad(); - break; - case '6': - set_flash_mode_qddr(); - break; - case '7': - reg_spictrl = reg_spictrl ^ 0x00100000; - break; - case '9': - cmd_benchmark(true, 0); - break; - case '0': - cmd_benchmark_all(); - break; - case 'M': - cmd_memtest(); - break; - case 'S': - cmd_print_spi_state(); - break; - case 'e': - cmd_echo(); - break; - default: - continue; - } - - break; - } - } -} diff --git a/picosoc/hx8kdemo.core b/picosoc/hx8kdemo.core deleted file mode 100644 index 97a1989..0000000 --- a/picosoc/hx8kdemo.core +++ /dev/null @@ -1,35 +0,0 @@ -CAPI=2: - -name : ::hx8kdemo:0 - -filesets: - hx8kdemo: - files: [hx8kdemo.v] - file_type : verilogSource - depend : [picosoc] - hx8ksim: - files: - - hx8kdemo_tb.v - file_type : verilogSource - depend : [spiflash, "yosys:techlibs:ice40"] - - constraints: - files: [hx8kdemo.pcf] - file_type : PCF - -targets: - synth: - default_tool : icestorm - filesets : [constraints, hx8kdemo] - tools: - icestorm: - arachne_pnr_options : [-d, 8k] - toplevel : [hx8kdemo] - sim: - default_tool : icarus - filesets : [hx8kdemo, hx8ksim] - tools: - xsim: - xelab_options : [--timescale, 1ns/1ps] - - toplevel : [testbench] diff --git a/picosoc/hx8kdemo.pcf b/picosoc/hx8kdemo.pcf deleted file mode 100644 index 418bae8..0000000 --- a/picosoc/hx8kdemo.pcf +++ /dev/null @@ -1,40 +0,0 @@ - -# Pinout for the iCE40-HX8K Breakout Board - -set_io clk J3 - -set_io flash_csb R12 -set_io flash_clk R11 -set_io flash_io0 P12 -set_io flash_io1 P11 - -# for QSPI mode the flash chip on the iCE40-HX8K Breakout Board -# must be replaced with one that supports QSPI and the IO2 and IO3 -# pins must be soldered to T9 and P8 (center on J3) -set_io flash_io2 T9 -set_io flash_io3 P8 - -set_io ser_tx B12 -set_io ser_rx B10 - -# left on J3 -set_io debug_ser_tx T1 -set_io debug_ser_rx R3 - -# right on J3 -set_io debug_flash_csb T15 -set_io debug_flash_clk R16 -set_io debug_flash_io0 N12 -set_io debug_flash_io1 P13 -set_io debug_flash_io2 T13 -set_io debug_flash_io3 T14 - -set_io leds[7] B5 # D9 -set_io leds[6] B4 # D8 -set_io leds[5] A2 # D7 -set_io leds[4] A1 # D6 -set_io leds[3] C5 # D5 -set_io leds[2] C4 # D4 -set_io leds[1] B3 # D3 -set_io leds[0] C3 # D2 - diff --git a/picosoc/hx8kdemo.v b/picosoc/hx8kdemo.v deleted file mode 100644 index f9a82f1..0000000 --- a/picosoc/hx8kdemo.v +++ /dev/null @@ -1,139 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -module hx8kdemo ( - input clk, - - output ser_tx, - input ser_rx, - - output [7:0] leds, - - output flash_csb, - output flash_clk, - inout flash_io0, - inout flash_io1, - inout flash_io2, - inout flash_io3, - - output debug_ser_tx, - output debug_ser_rx, - - output debug_flash_csb, - output debug_flash_clk, - output debug_flash_io0, - output debug_flash_io1, - output debug_flash_io2, - output debug_flash_io3 -); - reg [5:0] reset_cnt = 0; - wire resetn = &reset_cnt; - - always @(posedge clk) begin - reset_cnt <= reset_cnt + !resetn; - end - - wire flash_io0_oe, flash_io0_do, flash_io0_di; - wire flash_io1_oe, flash_io1_do, flash_io1_di; - wire flash_io2_oe, flash_io2_do, flash_io2_di; - wire flash_io3_oe, flash_io3_do, flash_io3_di; - - SB_IO #( - .PIN_TYPE(6'b 1010_01), - .PULLUP(1'b 0) - ) flash_io_buf [3:0] ( - .PACKAGE_PIN({flash_io3, flash_io2, flash_io1, flash_io0}), - .OUTPUT_ENABLE({flash_io3_oe, flash_io2_oe, flash_io1_oe, flash_io0_oe}), - .D_OUT_0({flash_io3_do, flash_io2_do, flash_io1_do, flash_io0_do}), - .D_IN_0({flash_io3_di, flash_io2_di, flash_io1_di, flash_io0_di}) - ); - - wire iomem_valid; - reg iomem_ready; - wire [3:0] iomem_wstrb; - wire [31:0] iomem_addr; - wire [31:0] iomem_wdata; - reg [31:0] iomem_rdata; - - reg [31:0] gpio; - assign leds = gpio; - - always @(posedge clk) begin - if (!resetn) begin - gpio <= 0; - end else begin - iomem_ready <= 0; - if (iomem_valid && !iomem_ready && iomem_addr[31:24] == 8'h 03) begin - iomem_ready <= 1; - iomem_rdata <= gpio; - if (iomem_wstrb[0]) gpio[ 7: 0] <= iomem_wdata[ 7: 0]; - if (iomem_wstrb[1]) gpio[15: 8] <= iomem_wdata[15: 8]; - if (iomem_wstrb[2]) gpio[23:16] <= iomem_wdata[23:16]; - if (iomem_wstrb[3]) gpio[31:24] <= iomem_wdata[31:24]; - end - end - end - - picosoc soc ( - .clk (clk ), - .resetn (resetn ), - - .ser_tx (ser_tx ), - .ser_rx (ser_rx ), - - .flash_csb (flash_csb ), - .flash_clk (flash_clk ), - - .flash_io0_oe (flash_io0_oe), - .flash_io1_oe (flash_io1_oe), - .flash_io2_oe (flash_io2_oe), - .flash_io3_oe (flash_io3_oe), - - .flash_io0_do (flash_io0_do), - .flash_io1_do (flash_io1_do), - .flash_io2_do (flash_io2_do), - .flash_io3_do (flash_io3_do), - - .flash_io0_di (flash_io0_di), - .flash_io1_di (flash_io1_di), - .flash_io2_di (flash_io2_di), - .flash_io3_di (flash_io3_di), - - .irq_5 (1'b0 ), - .irq_6 (1'b0 ), - .irq_7 (1'b0 ), - - .iomem_valid (iomem_valid ), - .iomem_ready (iomem_ready ), - .iomem_wstrb (iomem_wstrb ), - .iomem_addr (iomem_addr ), - .iomem_wdata (iomem_wdata ), - .iomem_rdata (iomem_rdata ) - ); - - assign debug_ser_tx = ser_tx; - assign debug_ser_rx = ser_rx; - - assign debug_flash_csb = flash_csb; - assign debug_flash_clk = flash_clk; - assign debug_flash_io0 = flash_io0_di; - assign debug_flash_io1 = flash_io1_di; - assign debug_flash_io2 = flash_io2_di; - assign debug_flash_io3 = flash_io3_di; -endmodule diff --git a/picosoc/hx8kdemo_tb.v b/picosoc/hx8kdemo_tb.v deleted file mode 100644 index 3fe9c1d..0000000 --- a/picosoc/hx8kdemo_tb.v +++ /dev/null @@ -1,108 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -`timescale 1 ns / 1 ps - -module testbench; - reg clk; - always #5 clk = (clk === 1'b0); - - localparam ser_half_period = 53; - event ser_sample; - - initial begin - $dumpfile("testbench.vcd"); - $dumpvars(0, testbench); - - repeat (6) begin - repeat (50000) @(posedge clk); - $display("+50000 cycles"); - end - $finish; - end - - integer cycle_cnt = 0; - - always @(posedge clk) begin - cycle_cnt <= cycle_cnt + 1; - end - - wire [7:0] leds; - - wire ser_rx; - wire ser_tx; - - wire flash_csb; - wire flash_clk; - wire flash_io0; - wire flash_io1; - wire flash_io2; - wire flash_io3; - - always @(leds) begin - #1 $display("%b", leds); - end - - hx8kdemo uut ( - .clk (clk ), - .leds (leds ), - .ser_rx (ser_rx ), - .ser_tx (ser_tx ), - .flash_csb(flash_csb), - .flash_clk(flash_clk), - .flash_io0(flash_io0), - .flash_io1(flash_io1), - .flash_io2(flash_io2), - .flash_io3(flash_io3) - ); - - spiflash spiflash ( - .csb(flash_csb), - .clk(flash_clk), - .io0(flash_io0), - .io1(flash_io1), - .io2(flash_io2), - .io3(flash_io3) - ); - - reg [7:0] buffer; - - always begin - @(negedge ser_tx); - - repeat (ser_half_period) @(posedge clk); - -> ser_sample; // start bit - - repeat (8) begin - repeat (ser_half_period) @(posedge clk); - repeat (ser_half_period) @(posedge clk); - buffer = {ser_tx, buffer[7:1]}; - -> ser_sample; // data bit - end - - repeat (ser_half_period) @(posedge clk); - repeat (ser_half_period) @(posedge clk); - -> ser_sample; // stop bit - - if (buffer < 32 || buffer >= 127) - $display("Serial data: %d", buffer); - else - $display("Serial data: '%c'", buffer); - end -endmodule diff --git a/picosoc/ice40up5k_spram.v b/picosoc/ice40up5k_spram.v deleted file mode 100644 index 6d010f2..0000000 --- a/picosoc/ice40up5k_spram.v +++ /dev/null @@ -1,91 +0,0 @@ - -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -module ice40up5k_spram #( - // We current always use the whole SPRAM (128 kB) - parameter integer WORDS = 32768 -) ( - input clk, - input [3:0] wen, - input [21:0] addr, - input [31:0] wdata, - output [31:0] rdata -); - - wire cs_0, cs_1; - wire [31:0] rdata_0, rdata_1; - - assign cs_0 = !addr[14]; - assign cs_1 = addr[14]; - assign rdata = addr[14] ? rdata_1 : rdata_0; - - SB_SPRAM256KA ram00 ( - .ADDRESS(addr[13:0]), - .DATAIN(wdata[15:0]), - .MASKWREN({wen[1], wen[1], wen[0], wen[0]}), - .WREN(wen[1]|wen[0]), - .CHIPSELECT(cs_0), - .CLOCK(clk), - .STANDBY(1'b0), - .SLEEP(1'b0), - .POWEROFF(1'b1), - .DATAOUT(rdata_0[15:0]) - ); - - SB_SPRAM256KA ram01 ( - .ADDRESS(addr[13:0]), - .DATAIN(wdata[31:16]), - .MASKWREN({wen[3], wen[3], wen[2], wen[2]}), - .WREN(wen[3]|wen[2]), - .CHIPSELECT(cs_0), - .CLOCK(clk), - .STANDBY(1'b0), - .SLEEP(1'b0), - .POWEROFF(1'b1), - .DATAOUT(rdata_0[31:16]) - ); - - SB_SPRAM256KA ram10 ( - .ADDRESS(addr[13:0]), - .DATAIN(wdata[15:0]), - .MASKWREN({wen[1], wen[1], wen[0], wen[0]}), - .WREN(wen[1]|wen[0]), - .CHIPSELECT(cs_1), - .CLOCK(clk), - .STANDBY(1'b0), - .SLEEP(1'b0), - .POWEROFF(1'b1), - .DATAOUT(rdata_1[15:0]) - ); - - SB_SPRAM256KA ram11 ( - .ADDRESS(addr[13:0]), - .DATAIN(wdata[31:16]), - .MASKWREN({wen[3], wen[3], wen[2], wen[2]}), - .WREN(wen[3]|wen[2]), - .CHIPSELECT(cs_1), - .CLOCK(clk), - .STANDBY(1'b0), - .SLEEP(1'b0), - .POWEROFF(1'b1), - .DATAOUT(rdata_1[31:16]) - ); - -endmodule diff --git a/picosoc/icebreaker.core b/picosoc/icebreaker.core deleted file mode 100644 index 5af5fd6..0000000 --- a/picosoc/icebreaker.core +++ /dev/null @@ -1,36 +0,0 @@ -CAPI=2: - -name : ::icebreaker:0 - -filesets: - top: - files: [icebreaker.v] - file_type : verilogSource - depend : [picosoc] - tb: - files: - - icebreaker_tb.v - file_type : verilogSource - depend : [spiflash, "yosys:techlibs:ice40"] - - constraints: - files: [icebreaker.pcf] - file_type : PCF - -targets: - synth: - default_tool : icestorm - filesets : [constraints, top] - tools: - icestorm: - nextpnr_options : [--freq, 13, --up5k] - pnr : next - toplevel : [icebreaker] - sim: - default_tool : icarus - filesets : [top, tb] - tools: - xsim: - xelab_options : [--timescale, 1ns/1ps] - - toplevel : [testbench] diff --git a/picosoc/icebreaker.pcf b/picosoc/icebreaker.pcf deleted file mode 100644 index 86cf78e..0000000 --- a/picosoc/icebreaker.pcf +++ /dev/null @@ -1,25 +0,0 @@ -# 12 MHz clock -set_io clk 35 - -# RS232 -set_io ser_rx 6 -set_io ser_tx 9 - -# SPI Flash -set_io flash_clk 15 -set_io flash_csb 16 -set_io flash_io0 14 -set_io flash_io1 17 -set_io flash_io2 12 -set_io flash_io3 13 - -# LEDs (PMOD 2) -set_io led1 27 -set_io led2 25 -set_io led3 21 -set_io led4 23 -set_io led5 26 - -# Onboard LEDs -set_io ledr_n 11 -set_io ledg_n 37 diff --git a/picosoc/icebreaker.v b/picosoc/icebreaker.v deleted file mode 100644 index a943bc6..0000000 --- a/picosoc/icebreaker.v +++ /dev/null @@ -1,151 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -`ifdef PICOSOC_V -`error "icebreaker.v must be read before picosoc.v!" -`endif - -`define PICOSOC_MEM ice40up5k_spram - -module icebreaker ( - input clk, - - output ser_tx, - input ser_rx, - - output led1, - output led2, - output led3, - output led4, - output led5, - - output ledr_n, - output ledg_n, - - output flash_csb, - output flash_clk, - inout flash_io0, - inout flash_io1, - inout flash_io2, - inout flash_io3 -); - parameter integer MEM_WORDS = 32768; - - reg [5:0] reset_cnt = 0; - wire resetn = &reset_cnt; - - always @(posedge clk) begin - reset_cnt <= reset_cnt + !resetn; - end - - wire [7:0] leds; - - assign led1 = leds[1]; - assign led2 = leds[2]; - assign led3 = leds[3]; - assign led4 = leds[4]; - assign led5 = leds[5]; - - assign ledr_n = !leds[6]; - assign ledg_n = !leds[7]; - - wire flash_io0_oe, flash_io0_do, flash_io0_di; - wire flash_io1_oe, flash_io1_do, flash_io1_di; - wire flash_io2_oe, flash_io2_do, flash_io2_di; - wire flash_io3_oe, flash_io3_do, flash_io3_di; - - SB_IO #( - .PIN_TYPE(6'b 1010_01), - .PULLUP(1'b 0) - ) flash_io_buf [3:0] ( - .PACKAGE_PIN({flash_io3, flash_io2, flash_io1, flash_io0}), - .OUTPUT_ENABLE({flash_io3_oe, flash_io2_oe, flash_io1_oe, flash_io0_oe}), - .D_OUT_0({flash_io3_do, flash_io2_do, flash_io1_do, flash_io0_do}), - .D_IN_0({flash_io3_di, flash_io2_di, flash_io1_di, flash_io0_di}) - ); - - wire iomem_valid; - reg iomem_ready; - wire [3:0] iomem_wstrb; - wire [31:0] iomem_addr; - wire [31:0] iomem_wdata; - reg [31:0] iomem_rdata; - - reg [31:0] gpio; - assign leds = gpio; - - always @(posedge clk) begin - if (!resetn) begin - gpio <= 0; - end else begin - iomem_ready <= 0; - if (iomem_valid && !iomem_ready && iomem_addr[31:24] == 8'h 03) begin - iomem_ready <= 1; - iomem_rdata <= gpio; - if (iomem_wstrb[0]) gpio[ 7: 0] <= iomem_wdata[ 7: 0]; - if (iomem_wstrb[1]) gpio[15: 8] <= iomem_wdata[15: 8]; - if (iomem_wstrb[2]) gpio[23:16] <= iomem_wdata[23:16]; - if (iomem_wstrb[3]) gpio[31:24] <= iomem_wdata[31:24]; - end - end - end - - picosoc #( - .BARREL_SHIFTER(0), - .ENABLE_MUL(0), - .ENABLE_DIV(0), - .ENABLE_FAST_MUL(1), - .MEM_WORDS(MEM_WORDS) - ) soc ( - .clk (clk ), - .resetn (resetn ), - - .ser_tx (ser_tx ), - .ser_rx (ser_rx ), - - .flash_csb (flash_csb ), - .flash_clk (flash_clk ), - - .flash_io0_oe (flash_io0_oe), - .flash_io1_oe (flash_io1_oe), - .flash_io2_oe (flash_io2_oe), - .flash_io3_oe (flash_io3_oe), - - .flash_io0_do (flash_io0_do), - .flash_io1_do (flash_io1_do), - .flash_io2_do (flash_io2_do), - .flash_io3_do (flash_io3_do), - - .flash_io0_di (flash_io0_di), - .flash_io1_di (flash_io1_di), - .flash_io2_di (flash_io2_di), - .flash_io3_di (flash_io3_di), - - .irq_5 (1'b0 ), - .irq_6 (1'b0 ), - .irq_7 (1'b0 ), - - .iomem_valid (iomem_valid ), - .iomem_ready (iomem_ready ), - .iomem_wstrb (iomem_wstrb ), - .iomem_addr (iomem_addr ), - .iomem_wdata (iomem_wdata ), - .iomem_rdata (iomem_rdata ) - ); -endmodule diff --git a/picosoc/icebreaker_tb.v b/picosoc/icebreaker_tb.v deleted file mode 100644 index c09c10d..0000000 --- a/picosoc/icebreaker_tb.v +++ /dev/null @@ -1,122 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -`timescale 1 ns / 1 ps - -module testbench; - reg clk; - always #5 clk = (clk === 1'b0); - - localparam ser_half_period = 53; - event ser_sample; - - initial begin - $dumpfile("testbench.vcd"); - $dumpvars(0, testbench); - - repeat (6) begin - repeat (50000) @(posedge clk); - $display("+50000 cycles"); - end - $finish; - end - - integer cycle_cnt = 0; - - always @(posedge clk) begin - cycle_cnt <= cycle_cnt + 1; - end - - wire led1, led2, led3, led4, led5; - wire ledr_n, ledg_n; - - wire [6:0] leds = {!ledg_n, !ledr_n, led5, led4, led3, led2, led1}; - - wire ser_rx; - wire ser_tx; - - wire flash_csb; - wire flash_clk; - wire flash_io0; - wire flash_io1; - wire flash_io2; - wire flash_io3; - - always @(leds) begin - #1 $display("%b", leds); - end - - icebreaker #( - // We limit the amount of memory in simulation - // in order to avoid reduce simulation time - // required for intialization of RAM - .MEM_WORDS(256) - ) uut ( - .clk (clk ), - .led1 (led1 ), - .led2 (led2 ), - .led3 (led3 ), - .led4 (led4 ), - .led5 (led5 ), - .ledr_n (ledr_n ), - .ledg_n (ledg_n ), - .ser_rx (ser_rx ), - .ser_tx (ser_tx ), - .flash_csb(flash_csb), - .flash_clk(flash_clk), - .flash_io0(flash_io0), - .flash_io1(flash_io1), - .flash_io2(flash_io2), - .flash_io3(flash_io3) - ); - - spiflash spiflash ( - .csb(flash_csb), - .clk(flash_clk), - .io0(flash_io0), - .io1(flash_io1), - .io2(flash_io2), - .io3(flash_io3) - ); - - reg [7:0] buffer; - - always begin - @(negedge ser_tx); - - repeat (ser_half_period) @(posedge clk); - -> ser_sample; // start bit - - repeat (8) begin - repeat (ser_half_period) @(posedge clk); - repeat (ser_half_period) @(posedge clk); - buffer = {ser_tx, buffer[7:1]}; - -> ser_sample; // data bit - end - - repeat (ser_half_period) @(posedge clk); - repeat (ser_half_period) @(posedge clk); - -> ser_sample; // stop bit - - if (buffer < 32 || buffer >= 127) - $display("Serial data: %d", buffer); - else - $display("Serial data: '%c'", buffer); - end -endmodule diff --git a/picosoc/overview.svg b/picosoc/overview.svg deleted file mode 100644 index 2335f76..0000000 --- a/picosoc/overview.svg +++ /dev/null @@ -1,757 +0,0 @@ -<?xml version="1.0" encoding="UTF-8" standalone="no"?> -<!-- Created with Inkscape (http://www.inkscape.org/) --> - -<svg - xmlns:dc="http://purl.org/dc/elements/1.1/" - xmlns:cc="http://creativecommons.org/ns#" - xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" - xmlns:svg="http://www.w3.org/2000/svg" - xmlns="http://www.w3.org/2000/svg" - xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" - xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" - width="752.71472" - height="512" - viewBox="0 0 752.71472 512" - id="svg2" - version="1.1" - inkscape:version="0.91 r13725" - sodipodi:docname="overview.svg"> - <defs - id="defs4" /> - <sodipodi:namedview - id="base" - pagecolor="#ffffff" - bordercolor="#666666" - borderopacity="1.0" - inkscape:pageopacity="0.0" - inkscape:pageshadow="2" - inkscape:zoom="1.4" - inkscape:cx="323.81769" - inkscape:cy="196.47245" - inkscape:document-units="px" - inkscape:current-layer="layer1" - showgrid="true" - units="px" - fit-margin-top="10" - fit-margin-right="10" - fit-margin-bottom="10" - fit-margin-left="10" - inkscape:window-width="1855" - inkscape:window-height="1056" - inkscape:window-x="65" - inkscape:window-y="24" - inkscape:window-maximized="1"> - <inkscape:grid - type="xygrid" - id="grid3336" - originx="184.53606" - originy="-656.49999" /> - </sodipodi:namedview> - <metadata - id="metadata7"> - <rdf:RDF> - <cc:Work - rdf:about=""> - <dc:format>image/svg+xml</dc:format> - <dc:type - rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> - <dc:title /> - </cc:Work> - </rdf:RDF> - </metadata> - <g - inkscape:label="Layer 1" - inkscape:groupmode="layer" - id="layer1" - transform="translate(184.53606,116.13779)"> - <rect - style="opacity:1;fill:#b3b3d0;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.93901455;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect3338" - width="601.48956" - height="490.06097" - x="-62.083782" - y="-105.16828" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-45.2868" - y="-60.797707" - id="text3340" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan3342" - x="-45.2868" - y="-60.797707" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:37.5px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">Your Chip</tspan></text> - <rect - style="opacity:1;fill:#b3e1b3;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:2;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect3344" - width="270" - height="390" - x="-32.053295" - y="-35.137794" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-22.429668" - y="-1.2263393" - id="text3340-0" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan3342-9" - x="-22.429668" - y="-1.2263393" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:25px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">PicoSoC</tspan></text> - <rect - style="opacity:1;fill:#d9883a;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:2;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect3364" - width="110" - height="90" - x="-22.053295" - y="24.862207" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="35.3167" - y="56.630821" - id="text3340-0-7" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="35.3167" - y="56.630821" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3384">XIP SPI</tspan><tspan - sodipodi:role="line" - x="35.3167" - y="75.380821" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3390">Flash</tspan><tspan - sodipodi:role="line" - x="35.3167" - y="94.130821" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3392">Controller</tspan><tspan - sodipodi:role="line" - x="35.3167" - y="112.88082" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3386" /></text> - <rect - style="opacity:1;fill:#d9883a;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.64055121;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect3394" - width="110.35945" - height="60.359447" - x="-22.233013" - y="124.68247" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="34.602421" - y="160.34511" - id="text3340-0-7-9" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="34.602421" - y="160.34511" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3386-2">UART</tspan></text> - <rect - style="opacity:1;fill:#d9883a;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:2;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect3432" - width="110" - height="150" - x="-22.053295" - y="194.8622" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="33.459568" - y="261.91653" - id="text3340-0-7-9-6" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="33.459568" - y="261.91653" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3386-2-6">SRAM</tspan><tspan - sodipodi:role="line" - x="33.459568" - y="280.66653" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3452" /><tspan - sodipodi:role="line" - x="33.459568" - y="294.5386" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3454">(default 1kB)</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="165.82141" - y="38.508293" - id="text3340-0-7-5" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="165.82141" - y="38.508293" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3494">32 Bit System Bus</tspan></text> - <rect - style="opacity:1;fill:#d9883a;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:2.19784403;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect3496" - width="119.80215" - height="290.30978" - x="108.04526" - y="55.060112" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="156.32541" - y="79.02784" - id="text3340-0-7-9-1" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="156.32541" - y="79.02784" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:center;text-anchor:middle" - id="tspan3386-2-9">PicoRV32</tspan></text> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - d="m 87.946684,264.8622 10,0 0,-219.999994 149.999996,0" - id="path3518" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - d="m 87.946684,154.8622 10,0" - id="path3520" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - d="m 87.946684,64.862196 10,0" - id="path3522" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - d="m 167.94668,44.862206 0,9.41744 0,0" - id="path3524" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,144.8622 -60,0" - id="path3526" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,164.8622 -60,0" - id="path3528" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,34.862206 -60,0" - id="path3530" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,54.862206 -60,0" - id="path3532" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,74.862196 -60,0" - id="path3534" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,84.862196 -60,0" - id="path3536" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,94.862196 -60,0" - id="path3538" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -22.053466,104.8622 -60,0" - id="path3540" - inkscape:connector-curvature="0" /> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-150.03317" - y="38.357124" - id="text4342" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344" - x="-150.03317" - y="38.357124" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">FLASH_SCK</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-150.03317" - y="58.357109" - id="text4342-0" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-2" - x="-150.03317" - y="58.357109" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">FLASH_CSB</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-150.03317" - y="78.357109" - id="text4342-9" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-6" - x="-150.03317" - y="78.357109" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">FLASH_IO0</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-150.03317" - y="87.857079" - id="text4342-5" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-4" - x="-150.03317" - y="87.857079" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">FLASH_IO1</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-150.03317" - y="98.357109" - id="text4342-3" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-7" - x="-150.03317" - y="98.357109" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">FLASH_IO2</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-150.03317" - y="107.85708" - id="text4342-05" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-0" - x="-150.03317" - y="107.85708" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">FLASH_IO3</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-148.6046" - y="148.14287" - id="text4342-7" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-28" - x="-148.6046" - y="148.14287" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">SERIAL_TX</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-148.46175" - y="168.14287" - id="text4342-7-4" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-28-2" - x="-148.46175" - y="168.14287" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">SERIAL_RX</tspan></text> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -81.821316,364.8622 349.999996,0 0,-10" - id="path4432" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -81.821316,374.8622 359.999996,0 0,-20" - id="path4434" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -21.821316,354.8622 0,10 0,0" - id="path4436" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m -11.821316,354.8622 0,20" - id="path4438" - inkscape:connector-curvature="0" /> - <rect - style="opacity:1;fill:#c7ca58;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.96552444;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect3344-5" - width="260.74875" - height="390.03448" - x="248.3298" - y="-34.998299" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="259.57034" - y="-1.2263241" - id="text3340-0-73" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan3342-9-8" - x="259.57034" - y="-1.2263241" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:25px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">Your Circuit</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-174.88274" - y="368.80356" - id="text4342-9-9" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-6-1" - x="-174.88274" - y="368.80356" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">SYSTEM_CLOCK</tspan></text> - <text - xml:space="preserve" - style="font-style:normal;font-weight:normal;font-size:80px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="-174.88274" - y="378.30356" - id="text4342-5-1" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - id="tspan4344-4-9" - x="-174.88274" - y="378.30356" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, '">SYSTEM_RESET</tspan></text> - <rect - style="opacity:1;fill:#d46785;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.95069826;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect4497" - width="218.62073" - height="60.049301" - x="278.15402" - y="24.837549" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - d="m 248.17868,44.862206 30,0" - id="path4499" - inkscape:connector-curvature="0" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';text-align:start;letter-spacing:0px;word-spacing:0px;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="288.32541" - y="47.02784" - id="text3340-0-7-9-1-9" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="288.32541" - y="47.02784" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:start;text-anchor:start" - id="tspan3386-2-9-7">GPIO Controller</tspan></text> - <rect - style="opacity:1;fill:#d46785;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:2;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect4519" - width="220" - height="120" - x="278.17868" - y="104.86222" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';text-align:start;letter-spacing:0px;word-spacing:0px;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="290.32541" - y="127.02784" - id="text3340-0-7-9-1-9-0" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="290.32541" - y="127.02784" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:start;text-anchor:start" - id="tspan3386-2-9-7-9">Custom Block</tspan></text> - <rect - style="opacity:1;fill:#d46785;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:2;stroke-linecap:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - id="rect4539" - width="220" - height="100" - x="278.17868" - y="244.8622" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';text-align:start;letter-spacing:0px;word-spacing:0px;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="290.32541" - y="267.02783" - id="text3340-0-7-9-1-9-0-6" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="290.32541" - y="267.02783" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:start;text-anchor:start" - id="tspan3386-2-9-7-9-6">Custom Block</tspan></text> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" - d="m 258.17868,44.862206 0,219.999994 20,0" - id="path4559" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 298.17868,84.862196 0,20.000004" - id="path4561" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 308.17868,84.862196 0,20.000004" - id="path4563" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 318.17868,84.862196 0,20.000004" - id="path4565" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 328.17868,84.862196 0,20.000004" - id="path4567" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 338.17868,84.862196 0,20.000004" - id="path4569" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 348.17868,84.862196 0,20.000004" - id="path4571" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 358.17868,84.862196 0,20.000004" - id="path4573" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 368.17868,84.862196 0,20.000004" - id="path4575" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 378.17868,84.862196 0,20.000004" - id="path4577" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 388.17868,84.862196 0,20.000004" - id="path4579" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 398.17868,84.862196 0,20.000004" - id="path4581" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 408.17868,84.862196 0,20.000004" - id="path4583" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 418.17868,84.862196 0,20.000004" - id="path4585" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 428.17868,84.862196 0,20.000004" - id="path4587" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 438.17868,84.862196 0,20.000004" - id="path4589" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 448.17868,84.862196 0,20.000004" - id="path4591" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 458.17868,84.862196 0,20.000004" - id="path4593" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 468.17868,84.862196 0,20.000004" - id="path4595" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 478.17868,84.862196 0,20.000004" - id="path4597" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 488.17868,84.862196 0,20.000004" - id="path4599" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,114.8622 60,0" - id="path4601" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,124.8622 60,0" - id="path4603" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,134.8622 60,0" - id="path4605" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,144.8622 60,0" - id="path4607" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,254.8622 60,0" - id="path4609" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,264.8622 60,0" - id="path4611" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,274.8622 60,0" - id="path4613" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,284.8622 60,0" - id="path4615" - inkscape:connector-curvature="0" /> - <text - xml:space="preserve" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80px;line-height:125%;font-family:'DejaVu Sans';-inkscape-font-specification:'DejaVu Sans';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - x="124.32541" - y="111.02784" - id="text3340-0-7-9-1-2" - sodipodi:linespacing="125%"><tspan - sodipodi:role="line" - x="124.32541" - y="111.02784" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:start;text-anchor:start" - id="tspan3386-2-9-8">- RISC-V ISA</tspan><tspan - sodipodi:role="line" - x="124.32541" - y="123.52784" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:start;text-anchor:start" - id="tspan4637">- RV32IMC</tspan><tspan - sodipodi:role="line" - x="124.32541" - y="136.02783" - style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10px;font-family:'Arial Black';-inkscape-font-specification:'Arial Black, ';text-align:start;text-anchor:start" - id="tspan4639">- GNU Toolchain</tspan></text> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,154.85204 60,0" - id="path4601-3" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,164.85204 60,0" - id="path4603-6" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,174.85204 60,0" - id="path4605-7" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,184.85204 60,0" - id="path4607-5" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,194.60966 60,0" - id="path4601-3-3" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,204.60966 60,0" - id="path4603-6-5" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.17868,214.60966 60,0" - id="path4605-7-6" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.07153,294.75505 60,0" - id="path4607-9" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.07153,304.74489 60,0" - id="path4601-3-1" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.07153,314.74489 60,0" - id="path4603-6-2" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.07153,324.74489 60,0" - id="path4605-7-7" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 498.07153,334.74489 60,0" - id="path4607-5-0" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 497.71438,29.85204 60,0" - id="path4603-6-7" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 497.71438,39.85204 60,0" - id="path4605-7-9" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 497.71438,49.85204 60,0" - id="path4607-5-2" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 497.71438,59.60966 60,0" - id="path4601-3-3-0" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 497.71438,69.60966 60,0" - id="path4603-6-5-2" - inkscape:connector-curvature="0" /> - <path - style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" - d="m 497.71438,79.60966 60,0" - id="path4605-7-6-3" - inkscape:connector-curvature="0" /> - </g> -</svg> diff --git a/picosoc/performance.png b/picosoc/performance.png Binary files differdeleted file mode 100644 index aac75b2..0000000 --- a/picosoc/performance.png +++ /dev/null diff --git a/picosoc/performance.py b/picosoc/performance.py deleted file mode 100644 index 92c50c5..0000000 --- a/picosoc/performance.py +++ /dev/null @@ -1,165 +0,0 @@ -#!/usr/bin/env python3 - -import matplotlib.pyplot as plt -import numpy as np - -uncompr_text = """ -default : 010f52ef -dspi-8 : 008dc82f -dspi-7 : 008d6d63 -dspi-6 : 008d1297 -dspi-5 : 008cb7cb -dspi-4 : 008c5cff -dspi-3 : 008c0233 -dspi-2 : 008ba767 -dspi-1 : 008b4c9b -dspi-crm-8 : 008af1cf -dspi-crm-7 : 008a9703 -dspi-crm-6 : 008a3c37 -dspi-crm-5 : 0089e16b -dspi-crm-4 : 0089869f -dspi-crm-3 : 00892bd3 -dspi-crm-2 : 0088d107 -dspi-crm-1 : 0088763b -qspi-8 : 004a2c6f -qspi-7 : 0049d1a3 -qspi-6 : 004976d7 -qspi-5 : 00491c0b -qspi-4 : 0048c13f -qspi-3 : 00486673 -qspi-2 : 00480ba7 -qspi-1 : 0047b0db -qspi-crm-8 : 0047560f -qspi-crm-7 : 0046fb43 -qspi-crm-6 : 0046a077 -qspi-crm-5 : 004645ab -qspi-crm-4 : 0045eadf -qspi-crm-3 : 00459013 -qspi-crm-2 : 00453547 -qspi-crm-1 : 0044da7b -qspi-ddr-8 : 00288bf5 -qspi-ddr-7 : 00283129 -qspi-ddr-6 : 0027d65d -qspi-ddr-5 : 00277b91 -qspi-ddr-4 : 002720c5 -qspi-ddr-3 : 0026c5f9 -qspi-ddr-2 : 00266b2d -qspi-ddr-1 : 00261061 -qspi-ddr-crm-8 : 0025b595 -qspi-ddr-crm-7 : 00255ac9 -qspi-ddr-crm-6 : 0024fffd -qspi-ddr-crm-5 : 0024a531 -qspi-ddr-crm-4 : 00244a65 -qspi-ddr-crm-3 : 0023ef99 -qspi-ddr-crm-2 : 002394cd -qspi-ddr-crm-1 : 00233a01 -instns : 0003df2d -""" - -compr_text = """ -default : 00f3d36d -dspi-8 : 008008ad -dspi-7 : 007fade1 -dspi-6 : 007f5315 -dspi-5 : 007ef849 -dspi-4 : 007e9d7d -dspi-3 : 007e42b1 -dspi-2 : 007de7e5 -dspi-1 : 007d8d19 -dspi-crm-8 : 007d324d -dspi-crm-7 : 007cd781 -dspi-crm-6 : 007c7cb5 -dspi-crm-5 : 007c21e9 -dspi-crm-4 : 007bc71d -dspi-crm-3 : 007b6c51 -dspi-crm-2 : 007b1185 -dspi-crm-1 : 007ab6b9 -qspi-8 : 00434ced -qspi-7 : 0042f221 -qspi-6 : 00429755 -qspi-5 : 00423c89 -qspi-4 : 0041e1bd -qspi-3 : 004186f1 -qspi-2 : 00412c25 -qspi-1 : 0040d159 -qspi-crm-8 : 0040768d -qspi-crm-7 : 00401bc1 -qspi-crm-6 : 003fc0f5 -qspi-crm-5 : 003f6629 -qspi-crm-4 : 003f0b5d -qspi-crm-3 : 003eb091 -qspi-crm-2 : 003e55c5 -qspi-crm-1 : 003dfaf9 -qspi-ddr-8 : 00255d87 -qspi-ddr-7 : 002502bb -qspi-ddr-6 : 0024a7ef -qspi-ddr-5 : 00244d23 -qspi-ddr-4 : 0023f257 -qspi-ddr-3 : 0023978b -qspi-ddr-2 : 00233cbf -qspi-ddr-1 : 0022e1f3 -qspi-ddr-crm-8 : 00228727 -qspi-ddr-crm-7 : 00222c5b -qspi-ddr-crm-6 : 0021d18f -qspi-ddr-crm-5 : 002176c3 -qspi-ddr-crm-4 : 00211bf7 -qspi-ddr-crm-3 : 0020c12b -qspi-ddr-crm-2 : 0020665f -qspi-ddr-crm-1 : 00200b93 -instns : 0003df2d -""" - -labels = list() -uncompr_values = list() -compr_values = list() - -for line in uncompr_text.split("\n"): - if line != "": - line = line.split() - if line[0] == "instns": - for i in range(len(uncompr_values)): - uncompr_values[i] = int(line[2], 16) / uncompr_values[i] - else: - labels.append(line[0]) - uncompr_values.append(int(line[2], 16)) - -for line in compr_text.split("\n"): - if line != "": - line = line.split() - if line[0] == "instns": - for i in range(len(compr_values)): - compr_values[i] = int(line[2], 16) / compr_values[i] - else: - compr_values.append(int(line[2], 16)) - -print(np.array(compr_values) / np.array(uncompr_values)) - -values = list() -for i in range(len(compr_values)): - values.append(uncompr_values[i] / uncompr_values[0]) - # values.append(compr_values[i] / compr_values[0]) - -values = np.array(values) -print(values) - -plt.figure(figsize=(10, 5)) -plt.title("Performance comparison for different PicoSoC SPI flash configurations") -plt.plot(range(len(labels)), values) -plt.xticks(range(len(labels)), labels, rotation=80) - -for color, x1, x2 in [["black", 0, 0], ["red", 1, 8], ["green", 9, 16], - ["red", 17, 24], ["green", 25, 32], ["red", 33, 40], ["green", 41, 48]]: - for t in plt.axes().xaxis.get_ticklabels()[x1:x2+1]: - t.set_color(color) - plt.plot([x1, x1], [0, values[x1] - 0.2], color=color) - plt.plot([x2, x2], [0, values[x2] - 0.2], color=color) - plt.plot([x1], [values[x1]], "k.") - plt.plot([x2], [values[x2]], "k.") - -plt.xlim(-1, len(labels)) -plt.ylim(0, 9) -plt.grid() - -plt.gcf().subplots_adjust(bottom=0.3) -plt.savefig("performance.png") -# plt.show() diff --git a/picosoc/picosoc.core b/picosoc/picosoc.core deleted file mode 100644 index eb0988a..0000000 --- a/picosoc/picosoc.core +++ /dev/null @@ -1,27 +0,0 @@ -CAPI=2: - -name : ::picosoc:0 - -filesets: - picosoc: - files: - - simpleuart.v - - spimemio.v - - picosoc.v - file_type : verilogSource - depend : [picorv32] - -targets: - default: - filesets : [picosoc] - parameters : [PICORV32_REGS, PICOSOC_MEM] - -parameters: - PICORV32_REGS: - datatype : str - default : picosoc_regs - paramtype : vlogdefine - PICOSOC_MEM: - datatype : str - default : picosoc_mem - paramtype : vlogdefine diff --git a/picosoc/picosoc.v b/picosoc/picosoc.v deleted file mode 100644 index 9790791..0000000 --- a/picosoc/picosoc.v +++ /dev/null @@ -1,262 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -`ifndef PICORV32_REGS -`ifdef PICORV32_V -`error "picosoc.v must be read before picorv32.v!" -`endif - -`define PICORV32_REGS picosoc_regs -`endif - -`ifndef PICOSOC_MEM -`define PICOSOC_MEM picosoc_mem -`endif - -// this macro can be used to check if the verilog files in your -// design are read in the correct order. -`define PICOSOC_V - -module picosoc ( - input clk, - input resetn, - - output iomem_valid, - input iomem_ready, - output [ 3:0] iomem_wstrb, - output [31:0] iomem_addr, - output [31:0] iomem_wdata, - input [31:0] iomem_rdata, - - input irq_5, - input irq_6, - input irq_7, - - output ser_tx, - input ser_rx, - - output flash_csb, - output flash_clk, - - output flash_io0_oe, - output flash_io1_oe, - output flash_io2_oe, - output flash_io3_oe, - - output flash_io0_do, - output flash_io1_do, - output flash_io2_do, - output flash_io3_do, - - input flash_io0_di, - input flash_io1_di, - input flash_io2_di, - input flash_io3_di -); - parameter [0:0] BARREL_SHIFTER = 1; - parameter [0:0] ENABLE_MUL = 1; - parameter [0:0] ENABLE_DIV = 1; - parameter [0:0] ENABLE_FAST_MUL = 0; - parameter [0:0] ENABLE_COMPRESSED = 1; - parameter [0:0] ENABLE_COUNTERS = 1; - parameter [0:0] ENABLE_IRQ_QREGS = 0; - - parameter integer MEM_WORDS = 256; - parameter [31:0] STACKADDR = (4*MEM_WORDS); // end of memory - parameter [31:0] PROGADDR_RESET = 32'h 0010_0000; // 1 MB into flash - parameter [31:0] PROGADDR_IRQ = 32'h 0000_0000; - - reg [31:0] irq; - wire irq_stall = 0; - wire irq_uart = 0; - - always @* begin - irq = 0; - irq[3] = irq_stall; - irq[4] = irq_uart; - irq[5] = irq_5; - irq[6] = irq_6; - irq[7] = irq_7; - end - - wire mem_valid; - wire mem_instr; - wire mem_ready; - wire [31:0] mem_addr; - wire [31:0] mem_wdata; - wire [3:0] mem_wstrb; - wire [31:0] mem_rdata; - - wire spimem_ready; - wire [31:0] spimem_rdata; - - reg ram_ready; - wire [31:0] ram_rdata; - - assign iomem_valid = mem_valid && (mem_addr[31:24] > 8'h 01); - assign iomem_wstrb = mem_wstrb; - assign iomem_addr = mem_addr; - assign iomem_wdata = mem_wdata; - - wire spimemio_cfgreg_sel = mem_valid && (mem_addr == 32'h 0200_0000); - wire [31:0] spimemio_cfgreg_do; - - wire simpleuart_reg_div_sel = mem_valid && (mem_addr == 32'h 0200_0004); - wire [31:0] simpleuart_reg_div_do; - - wire simpleuart_reg_dat_sel = mem_valid && (mem_addr == 32'h 0200_0008); - wire [31:0] simpleuart_reg_dat_do; - wire simpleuart_reg_dat_wait; - - assign mem_ready = (iomem_valid && iomem_ready) || spimem_ready || ram_ready || spimemio_cfgreg_sel || - simpleuart_reg_div_sel || (simpleuart_reg_dat_sel && !simpleuart_reg_dat_wait); - - assign mem_rdata = (iomem_valid && iomem_ready) ? iomem_rdata : spimem_ready ? spimem_rdata : ram_ready ? ram_rdata : - spimemio_cfgreg_sel ? spimemio_cfgreg_do : simpleuart_reg_div_sel ? simpleuart_reg_div_do : - simpleuart_reg_dat_sel ? simpleuart_reg_dat_do : 32'h 0000_0000; - - picorv32 #( - .STACKADDR(STACKADDR), - .PROGADDR_RESET(PROGADDR_RESET), - .PROGADDR_IRQ(PROGADDR_IRQ), - .BARREL_SHIFTER(BARREL_SHIFTER), - .COMPRESSED_ISA(ENABLE_COMPRESSED), - .ENABLE_COUNTERS(ENABLE_COUNTERS), - .ENABLE_MUL(ENABLE_MUL), - .ENABLE_DIV(ENABLE_DIV), - .ENABLE_FAST_MUL(ENABLE_FAST_MUL), - .ENABLE_IRQ(1), - .ENABLE_IRQ_QREGS(ENABLE_IRQ_QREGS) - ) cpu ( - .clk (clk ), - .resetn (resetn ), - .mem_valid (mem_valid ), - .mem_instr (mem_instr ), - .mem_ready (mem_ready ), - .mem_addr (mem_addr ), - .mem_wdata (mem_wdata ), - .mem_wstrb (mem_wstrb ), - .mem_rdata (mem_rdata ), - .irq (irq ) - ); - - spimemio spimemio ( - .clk (clk), - .resetn (resetn), - .valid (mem_valid && mem_addr >= 4*MEM_WORDS && mem_addr < 32'h 0200_0000), - .ready (spimem_ready), - .addr (mem_addr[23:0]), - .rdata (spimem_rdata), - - .flash_csb (flash_csb ), - .flash_clk (flash_clk ), - - .flash_io0_oe (flash_io0_oe), - .flash_io1_oe (flash_io1_oe), - .flash_io2_oe (flash_io2_oe), - .flash_io3_oe (flash_io3_oe), - - .flash_io0_do (flash_io0_do), - .flash_io1_do (flash_io1_do), - .flash_io2_do (flash_io2_do), - .flash_io3_do (flash_io3_do), - - .flash_io0_di (flash_io0_di), - .flash_io1_di (flash_io1_di), - .flash_io2_di (flash_io2_di), - .flash_io3_di (flash_io3_di), - - .cfgreg_we(spimemio_cfgreg_sel ? mem_wstrb : 4'b 0000), - .cfgreg_di(mem_wdata), - .cfgreg_do(spimemio_cfgreg_do) - ); - - simpleuart simpleuart ( - .clk (clk ), - .resetn (resetn ), - - .ser_tx (ser_tx ), - .ser_rx (ser_rx ), - - .reg_div_we (simpleuart_reg_div_sel ? mem_wstrb : 4'b 0000), - .reg_div_di (mem_wdata), - .reg_div_do (simpleuart_reg_div_do), - - .reg_dat_we (simpleuart_reg_dat_sel ? mem_wstrb[0] : 1'b 0), - .reg_dat_re (simpleuart_reg_dat_sel && !mem_wstrb), - .reg_dat_di (mem_wdata), - .reg_dat_do (simpleuart_reg_dat_do), - .reg_dat_wait(simpleuart_reg_dat_wait) - ); - - always @(posedge clk) - ram_ready <= mem_valid && !mem_ready && mem_addr < 4*MEM_WORDS; - - `PICOSOC_MEM #( - .WORDS(MEM_WORDS) - ) memory ( - .clk(clk), - .wen((mem_valid && !mem_ready && mem_addr < 4*MEM_WORDS) ? mem_wstrb : 4'b0), - .addr(mem_addr[23:2]), - .wdata(mem_wdata), - .rdata(ram_rdata) - ); -endmodule - -// Implementation note: -// Replace the following two modules with wrappers for your SRAM cells. - -module picosoc_regs ( - input clk, wen, - input [5:0] waddr, - input [5:0] raddr1, - input [5:0] raddr2, - input [31:0] wdata, - output [31:0] rdata1, - output [31:0] rdata2 -); - reg [31:0] regs [0:31]; - - always @(posedge clk) - if (wen) regs[waddr[4:0]] <= wdata; - - assign rdata1 = regs[raddr1[4:0]]; - assign rdata2 = regs[raddr2[4:0]]; -endmodule - -module picosoc_mem #( - parameter integer WORDS = 256 -) ( - input clk, - input [3:0] wen, - input [21:0] addr, - input [31:0] wdata, - output reg [31:0] rdata -); - reg [31:0] mem [0:WORDS-1]; - - always @(posedge clk) begin - rdata <= mem[addr]; - if (wen[0]) mem[addr][ 7: 0] <= wdata[ 7: 0]; - if (wen[1]) mem[addr][15: 8] <= wdata[15: 8]; - if (wen[2]) mem[addr][23:16] <= wdata[23:16]; - if (wen[3]) mem[addr][31:24] <= wdata[31:24]; - end -endmodule - diff --git a/picosoc/sections.lds b/picosoc/sections.lds deleted file mode 100644 index f38d813..0000000 --- a/picosoc/sections.lds +++ /dev/null @@ -1,71 +0,0 @@ -#ifdef ICEBREAKER -# define MEM_TOTAL 0x20000 /* 128 KB */ -#elif HX8KDEMO -# define MEM_TOTAL 0x200 /* 2 KB */ -#else -# error "Set -DICEBREAKER or -DHX8KDEMO when compiling firmware.c" -#endif - -MEMORY -{ - FLASH (rx) : ORIGIN = 0x00100000, LENGTH = 0x400000 /* entire flash, 4 MiB */ - RAM (xrw) : ORIGIN = 0x00000000, LENGTH = MEM_TOTAL -} - -SECTIONS { - /* The program code and other data goes into FLASH */ - .text : - { - . = ALIGN(4); - *(.text) /* .text sections (code) */ - *(.text*) /* .text* sections (code) */ - *(.rodata) /* .rodata sections (constants, strings, etc.) */ - *(.rodata*) /* .rodata* sections (constants, strings, etc.) */ - *(.srodata) /* .rodata sections (constants, strings, etc.) */ - *(.srodata*) /* .rodata* sections (constants, strings, etc.) */ - . = ALIGN(4); - _etext = .; /* define a global symbol at end of code */ - _sidata = _etext; /* This is used by the startup in order to initialize the .data secion */ - } >FLASH - - - /* This is the initialized data section - The program executes knowing that the data is in the RAM - but the loader puts the initial values in the FLASH (inidata). - It is one task of the startup to copy the initial values from FLASH to RAM. */ - .data : AT ( _sidata ) - { - . = ALIGN(4); - _sdata = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */ - _ram_start = .; /* create a global symbol at ram start for garbage collector */ - . = ALIGN(4); - *(.data) /* .data sections */ - *(.data*) /* .data* sections */ - *(.sdata) /* .sdata sections */ - *(.sdata*) /* .sdata* sections */ - . = ALIGN(4); - _edata = .; /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */ - } >RAM - - /* Uninitialized data section */ - .bss : - { - . = ALIGN(4); - _sbss = .; /* define a global symbol at bss start; used by startup code */ - *(.bss) - *(.bss*) - *(.sbss) - *(.sbss*) - *(COMMON) - - . = ALIGN(4); - _ebss = .; /* define a global symbol at bss end; used by startup code */ - } >RAM - - /* this is to define the start of the heap, and make sure we have a minimum size */ - .heap : - { - . = ALIGN(4); - _heap_start = .; /* define a global symbol at heap start */ - } >RAM -} diff --git a/picosoc/simpleuart.v b/picosoc/simpleuart.v deleted file mode 100644 index 5ffef77..0000000 --- a/picosoc/simpleuart.v +++ /dev/null @@ -1,137 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -module simpleuart #(parameter integer DEFAULT_DIV = 1) ( - input clk, - input resetn, - - output ser_tx, - input ser_rx, - - input [3:0] reg_div_we, - input [31:0] reg_div_di, - output [31:0] reg_div_do, - - input reg_dat_we, - input reg_dat_re, - input [31:0] reg_dat_di, - output [31:0] reg_dat_do, - output reg_dat_wait -); - reg [31:0] cfg_divider; - - reg [3:0] recv_state; - reg [31:0] recv_divcnt; - reg [7:0] recv_pattern; - reg [7:0] recv_buf_data; - reg recv_buf_valid; - - reg [9:0] send_pattern; - reg [3:0] send_bitcnt; - reg [31:0] send_divcnt; - reg send_dummy; - - assign reg_div_do = cfg_divider; - - assign reg_dat_wait = reg_dat_we && (send_bitcnt || send_dummy); - assign reg_dat_do = recv_buf_valid ? recv_buf_data : ~0; - - always @(posedge clk) begin - if (!resetn) begin - cfg_divider <= DEFAULT_DIV; - end else begin - if (reg_div_we[0]) cfg_divider[ 7: 0] <= reg_div_di[ 7: 0]; - if (reg_div_we[1]) cfg_divider[15: 8] <= reg_div_di[15: 8]; - if (reg_div_we[2]) cfg_divider[23:16] <= reg_div_di[23:16]; - if (reg_div_we[3]) cfg_divider[31:24] <= reg_div_di[31:24]; - end - end - - always @(posedge clk) begin - if (!resetn) begin - recv_state <= 0; - recv_divcnt <= 0; - recv_pattern <= 0; - recv_buf_data <= 0; - recv_buf_valid <= 0; - end else begin - recv_divcnt <= recv_divcnt + 1; - if (reg_dat_re) - recv_buf_valid <= 0; - case (recv_state) - 0: begin - if (!ser_rx) - recv_state <= 1; - recv_divcnt <= 0; - end - 1: begin - if (2*recv_divcnt > cfg_divider) begin - recv_state <= 2; - recv_divcnt <= 0; - end - end - 10: begin - if (recv_divcnt > cfg_divider) begin - recv_buf_data <= recv_pattern; - recv_buf_valid <= 1; - recv_state <= 0; - end - end - default: begin - if (recv_divcnt > cfg_divider) begin - recv_pattern <= {ser_rx, recv_pattern[7:1]}; - recv_state <= recv_state + 1; - recv_divcnt <= 0; - end - end - endcase - end - end - - assign ser_tx = send_pattern[0]; - - always @(posedge clk) begin - if (reg_div_we) - send_dummy <= 1; - send_divcnt <= send_divcnt + 1; - if (!resetn) begin - send_pattern <= ~0; - send_bitcnt <= 0; - send_divcnt <= 0; - send_dummy <= 1; - end else begin - if (send_dummy && !send_bitcnt) begin - send_pattern <= ~0; - send_bitcnt <= 15; - send_divcnt <= 0; - send_dummy <= 0; - end else - if (reg_dat_we && !send_bitcnt) begin - send_pattern <= {1'b1, reg_dat_di[7:0], 1'b0}; - send_bitcnt <= 10; - send_divcnt <= 0; - end else - if (send_divcnt > cfg_divider && send_bitcnt) begin - send_pattern <= {1'b1, send_pattern[9:1]}; - send_bitcnt <= send_bitcnt - 1; - send_divcnt <= 0; - end - end - end -endmodule diff --git a/picosoc/spiflash.core b/picosoc/spiflash.core deleted file mode 100644 index 1b7d153..0000000 --- a/picosoc/spiflash.core +++ /dev/null @@ -1,24 +0,0 @@ -CAPI=2: - -name : ::spiflash:0 - -filesets: - model: - files : [spiflash.v] - file_type : verilogSource - tb: - files : [spiflash_tb.v] - file_type : verilogSource - -targets: - default: - default_tool : icarus - filesets : [model, "is_toplevel? (tb)"] - parameters : [firmware] - toplevel : [testbench] - -parameters : - firmware: - datatype : file - description : Initial SPI Flash contents (in verilog hex format) - paramtype : plusarg diff --git a/picosoc/spiflash.v b/picosoc/spiflash.v deleted file mode 100644 index 22b337b..0000000 --- a/picosoc/spiflash.v +++ /dev/null @@ -1,409 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -`timescale 1 ns / 1 ps - -// -// Simple SPI flash simulation model -// -// This model samples io input signals 1ns before the SPI clock edge and -// updates output signals 1ns after the SPI clock edge. -// -// Supported commands: -// AB, B9, FF, 03, BB, EB, ED -// -// Well written SPI flash data sheets: -// Cypress S25FL064L http://www.cypress.com/file/316661/download -// Cypress S25FL128L http://www.cypress.com/file/316171/download -// -// SPI flash used on iCEBreaker board: -// https://www.winbond.com/resource-files/w25q128jv%20dtr%20revb%2011042016.pdf -// - -module spiflash ( - input csb, - input clk, - inout io0, // MOSI - inout io1, // MISO - inout io2, - inout io3 -); - localparam verbose = 0; - localparam integer latency = 8; - - reg [7:0] buffer; - integer bitcount = 0; - integer bytecount = 0; - integer dummycount = 0; - - reg [7:0] spi_cmd; - reg [7:0] xip_cmd = 0; - reg [23:0] spi_addr; - - reg [7:0] spi_in; - reg [7:0] spi_out; - reg spi_io_vld; - - reg powered_up = 0; - - localparam [3:0] mode_spi = 1; - localparam [3:0] mode_dspi_rd = 2; - localparam [3:0] mode_dspi_wr = 3; - localparam [3:0] mode_qspi_rd = 4; - localparam [3:0] mode_qspi_wr = 5; - localparam [3:0] mode_qspi_ddr_rd = 6; - localparam [3:0] mode_qspi_ddr_wr = 7; - - reg [3:0] mode = 0; - reg [3:0] next_mode = 0; - - reg io0_oe = 0; - reg io1_oe = 0; - reg io2_oe = 0; - reg io3_oe = 0; - - reg io0_dout = 0; - reg io1_dout = 0; - reg io2_dout = 0; - reg io3_dout = 0; - - assign #1 io0 = io0_oe ? io0_dout : 1'bz; - assign #1 io1 = io1_oe ? io1_dout : 1'bz; - assign #1 io2 = io2_oe ? io2_dout : 1'bz; - assign #1 io3 = io3_oe ? io3_dout : 1'bz; - - wire io0_delayed; - wire io1_delayed; - wire io2_delayed; - wire io3_delayed; - - assign #1 io0_delayed = io0; - assign #1 io1_delayed = io1; - assign #1 io2_delayed = io2; - assign #1 io3_delayed = io3; - - // 16 MB (128Mb) Flash - reg [7:0] memory [0:16*1024*1024-1]; - - reg [1023:0] firmware_file; - initial begin - if (!$value$plusargs("firmware=%s", firmware_file)) - firmware_file = "firmware.hex"; - $readmemh(firmware_file, memory); - end - - task spi_action; - begin - spi_in = buffer; - - if (bytecount == 1) begin - spi_cmd = buffer; - - if (spi_cmd == 8'h ab) - powered_up = 1; - - if (spi_cmd == 8'h b9) - powered_up = 0; - - if (spi_cmd == 8'h ff) - xip_cmd = 0; - end - - if (powered_up && spi_cmd == 'h 03) begin - if (bytecount == 2) - spi_addr[23:16] = buffer; - - if (bytecount == 3) - spi_addr[15:8] = buffer; - - if (bytecount == 4) - spi_addr[7:0] = buffer; - - if (bytecount >= 4) begin - buffer = memory[spi_addr]; - spi_addr = spi_addr + 1; - end - end - - if (powered_up && spi_cmd == 'h bb) begin - if (bytecount == 1) - mode = mode_dspi_rd; - - if (bytecount == 2) - spi_addr[23:16] = buffer; - - if (bytecount == 3) - spi_addr[15:8] = buffer; - - if (bytecount == 4) - spi_addr[7:0] = buffer; - - if (bytecount == 5) begin - xip_cmd = (buffer == 8'h a5) ? spi_cmd : 8'h 00; - mode = mode_dspi_wr; - dummycount = latency; - end - - if (bytecount >= 5) begin - buffer = memory[spi_addr]; - spi_addr = spi_addr + 1; - end - end - - if (powered_up && spi_cmd == 'h eb) begin - if (bytecount == 1) - mode = mode_qspi_rd; - - if (bytecount == 2) - spi_addr[23:16] = buffer; - - if (bytecount == 3) - spi_addr[15:8] = buffer; - - if (bytecount == 4) - spi_addr[7:0] = buffer; - - if (bytecount == 5) begin - xip_cmd = (buffer == 8'h a5) ? spi_cmd : 8'h 00; - mode = mode_qspi_wr; - dummycount = latency; - end - - if (bytecount >= 5) begin - buffer = memory[spi_addr]; - spi_addr = spi_addr + 1; - end - end - - if (powered_up && spi_cmd == 'h ed) begin - if (bytecount == 1) - next_mode = mode_qspi_ddr_rd; - - if (bytecount == 2) - spi_addr[23:16] = buffer; - - if (bytecount == 3) - spi_addr[15:8] = buffer; - - if (bytecount == 4) - spi_addr[7:0] = buffer; - - if (bytecount == 5) begin - xip_cmd = (buffer == 8'h a5) ? spi_cmd : 8'h 00; - mode = mode_qspi_ddr_wr; - dummycount = latency; - end - - if (bytecount >= 5) begin - buffer = memory[spi_addr]; - spi_addr = spi_addr + 1; - end - end - - spi_out = buffer; - spi_io_vld = 1; - - if (verbose) begin - if (bytecount == 1) - $write("<SPI-START>"); - $write("<SPI:%02x:%02x>", spi_in, spi_out); - end - - end - endtask - - task ddr_rd_edge; - begin - buffer = {buffer, io3_delayed, io2_delayed, io1_delayed, io0_delayed}; - bitcount = bitcount + 4; - if (bitcount == 8) begin - bitcount = 0; - bytecount = bytecount + 1; - spi_action; - end - end - endtask - - task ddr_wr_edge; - begin - io0_oe = 1; - io1_oe = 1; - io2_oe = 1; - io3_oe = 1; - - io0_dout = buffer[4]; - io1_dout = buffer[5]; - io2_dout = buffer[6]; - io3_dout = buffer[7]; - - buffer = {buffer, 4'h 0}; - bitcount = bitcount + 4; - if (bitcount == 8) begin - bitcount = 0; - bytecount = bytecount + 1; - spi_action; - end - end - endtask - - always @(csb) begin - if (csb) begin - if (verbose) begin - $display(""); - $fflush; - end - buffer = 0; - bitcount = 0; - bytecount = 0; - mode = mode_spi; - io0_oe = 0; - io1_oe = 0; - io2_oe = 0; - io3_oe = 0; - end else - if (xip_cmd) begin - buffer = xip_cmd; - bitcount = 0; - bytecount = 1; - spi_action; - end - end - - always @(csb, clk) begin - spi_io_vld = 0; - if (!csb && !clk) begin - if (dummycount > 0) begin - io0_oe = 0; - io1_oe = 0; - io2_oe = 0; - io3_oe = 0; - end else - case (mode) - mode_spi: begin - io0_oe = 0; - io1_oe = 1; - io2_oe = 0; - io3_oe = 0; - io1_dout = buffer[7]; - end - mode_dspi_rd: begin - io0_oe = 0; - io1_oe = 0; - io2_oe = 0; - io3_oe = 0; - end - mode_dspi_wr: begin - io0_oe = 1; - io1_oe = 1; - io2_oe = 0; - io3_oe = 0; - io0_dout = buffer[6]; - io1_dout = buffer[7]; - end - mode_qspi_rd: begin - io0_oe = 0; - io1_oe = 0; - io2_oe = 0; - io3_oe = 0; - end - mode_qspi_wr: begin - io0_oe = 1; - io1_oe = 1; - io2_oe = 1; - io3_oe = 1; - io0_dout = buffer[4]; - io1_dout = buffer[5]; - io2_dout = buffer[6]; - io3_dout = buffer[7]; - end - mode_qspi_ddr_rd: begin - ddr_rd_edge; - end - mode_qspi_ddr_wr: begin - ddr_wr_edge; - end - endcase - if (next_mode) begin - case (next_mode) - mode_qspi_ddr_rd: begin - io0_oe = 0; - io1_oe = 0; - io2_oe = 0; - io3_oe = 0; - end - mode_qspi_ddr_wr: begin - io0_oe = 1; - io1_oe = 1; - io2_oe = 1; - io3_oe = 1; - io0_dout = buffer[4]; - io1_dout = buffer[5]; - io2_dout = buffer[6]; - io3_dout = buffer[7]; - end - endcase - mode = next_mode; - next_mode = 0; - end - end - end - - always @(posedge clk) begin - if (!csb) begin - if (dummycount > 0) begin - dummycount = dummycount - 1; - end else - case (mode) - mode_spi: begin - buffer = {buffer, io0}; - bitcount = bitcount + 1; - if (bitcount == 8) begin - bitcount = 0; - bytecount = bytecount + 1; - spi_action; - end - end - mode_dspi_rd, mode_dspi_wr: begin - buffer = {buffer, io1, io0}; - bitcount = bitcount + 2; - if (bitcount == 8) begin - bitcount = 0; - bytecount = bytecount + 1; - spi_action; - end - end - mode_qspi_rd, mode_qspi_wr: begin - buffer = {buffer, io3, io2, io1, io0}; - bitcount = bitcount + 4; - if (bitcount == 8) begin - bitcount = 0; - bytecount = bytecount + 1; - spi_action; - end - end - mode_qspi_ddr_rd: begin - ddr_rd_edge; - end - mode_qspi_ddr_wr: begin - ddr_wr_edge; - end - endcase - end - end -endmodule diff --git a/picosoc/spiflash_tb.v b/picosoc/spiflash_tb.v deleted file mode 100644 index a5b5edc..0000000 --- a/picosoc/spiflash_tb.v +++ /dev/null @@ -1,366 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -`timescale 1 ns / 1 ps - -module testbench; - reg flash_csb = 1; - reg flash_clk = 0; - - wire flash_io0; - wire flash_io1; - wire flash_io2; - wire flash_io3; - - reg flash_io0_oe = 0; - reg flash_io1_oe = 0; - reg flash_io2_oe = 0; - reg flash_io3_oe = 0; - - reg flash_io0_dout = 0; - reg flash_io1_dout = 0; - reg flash_io2_dout = 0; - reg flash_io3_dout = 0; - - assign flash_io0 = flash_io0_oe ? flash_io0_dout : 1'bz; - assign flash_io1 = flash_io1_oe ? flash_io1_dout : 1'bz; - assign flash_io2 = flash_io2_oe ? flash_io2_dout : 1'bz; - assign flash_io3 = flash_io3_oe ? flash_io3_dout : 1'bz; - - spiflash uut ( - .csb(flash_csb), - .clk(flash_clk), - .io0(flash_io0), - .io1(flash_io1), - .io2(flash_io2), - .io3(flash_io3) - ); - - localparam [23:0] offset = 24'h100000; - localparam [31:0] word0 = 32'h 00000093; - localparam [31:0] word1 = 32'h 00000193; - - reg [7:0] rdata; - integer errcount = 0; - - task expect; - input [7:0] data; - begin - if (data !== rdata) begin - $display("ERROR: Got %x (%b) but expected %x (%b).", rdata, rdata, data, data); - errcount = errcount + 1; - end - end - endtask - - task xfer_begin; - begin - #5; - flash_csb = 0; - $display("-- BEGIN"); - #5; - end - endtask - - task xfer_dummy; - begin - flash_io0_oe = 0; - flash_io1_oe = 0; - flash_io2_oe = 0; - flash_io3_oe = 0; - - #5; - flash_clk = 1; - #5; - flash_clk = 0; - #5; - end - endtask - - task xfer_end; - begin - #5; - flash_csb = 1; - flash_io0_oe = 0; - flash_io1_oe = 0; - flash_io2_oe = 0; - flash_io3_oe = 0; - $display("-- END"); - $display(""); - #5; - end - endtask - - task xfer_spi; - input [7:0] data; - integer i; - begin - flash_io0_oe = 1; - flash_io1_oe = 0; - flash_io2_oe = 0; - flash_io3_oe = 0; - - for (i = 0; i < 8; i=i+1) begin - flash_io0_dout = data[7-i]; - #5; - flash_clk = 1; - rdata[7-i] = flash_io1; - #5; - flash_clk = 0; - end - - $display("-- SPI SDR %02x %02x", data, rdata); - #5; - end - endtask - - task xfer_qspi_wr; - input [7:0] data; - integer i; - begin - flash_io0_oe = 1; - flash_io1_oe = 1; - flash_io2_oe = 1; - flash_io3_oe = 1; - - flash_io0_dout = data[4]; - flash_io1_dout = data[5]; - flash_io2_dout = data[6]; - flash_io3_dout = data[7]; - - #5; - flash_clk = 1; - - #5; - flash_clk = 0; - flash_io0_dout = data[0]; - flash_io1_dout = data[1]; - flash_io2_dout = data[2]; - flash_io3_dout = data[3]; - - #5; - flash_clk = 1; - #5; - flash_clk = 0; - - $display("-- QSPI SDR %02x --", data); - #5; - end - endtask - - task xfer_qspi_rd; - integer i; - begin - flash_io0_oe = 0; - flash_io1_oe = 0; - flash_io2_oe = 0; - flash_io3_oe = 0; - - #5; - flash_clk = 1; - rdata[4] = flash_io0; - rdata[5] = flash_io1; - rdata[6] = flash_io2; - rdata[7] = flash_io3; - - #5; - flash_clk = 0; - - #5; - flash_clk = 1; - rdata[0] = flash_io0; - rdata[1] = flash_io1; - rdata[2] = flash_io2; - rdata[3] = flash_io3; - - #5; - flash_clk = 0; - - $display("-- QSPI SDR -- %02x", rdata); - #5; - end - endtask - - task xfer_qspi_ddr_wr; - input [7:0] data; - integer i; - begin - flash_io0_oe = 1; - flash_io1_oe = 1; - flash_io2_oe = 1; - flash_io3_oe = 1; - - flash_io0_dout = data[4]; - flash_io1_dout = data[5]; - flash_io2_dout = data[6]; - flash_io3_dout = data[7]; - - #5; - flash_clk = 1; - flash_io0_dout = data[0]; - flash_io1_dout = data[1]; - flash_io2_dout = data[2]; - flash_io3_dout = data[3]; - - #5; - flash_clk = 0; - - $display("-- QSPI DDR %02x --", data); - #5; - end - endtask - - task xfer_qspi_ddr_rd; - integer i; - begin - flash_io0_oe = 0; - flash_io1_oe = 0; - flash_io2_oe = 0; - flash_io3_oe = 0; - - #5; - flash_clk = 1; - rdata[4] = flash_io0; - rdata[5] = flash_io1; - rdata[6] = flash_io2; - rdata[7] = flash_io3; - - #5; - flash_clk = 0; - rdata[0] = flash_io0; - rdata[1] = flash_io1; - rdata[2] = flash_io2; - rdata[3] = flash_io3; - - $display("-- QSPI DDR -- %02x", rdata); - #5; - end - endtask - - initial begin - $dumpfile("spiflash_tb.vcd"); - $dumpvars(0, testbench); - $display(""); - - $display("Reset (FFh)"); - xfer_begin; - xfer_spi(8'h ff); - xfer_end; - - $display("Power Up (ABh)"); - xfer_begin; - xfer_spi(8'h ab); - xfer_end; - - $display("Read Data (03h)"); - xfer_begin; - xfer_spi(8'h 03); - xfer_spi(offset[23:16]); - xfer_spi(offset[15:8]); - xfer_spi(offset[7:0]); - xfer_spi(8'h 00); expect(word0[7:0]); - xfer_spi(8'h 00); expect(word0[15:8]); - xfer_spi(8'h 00); expect(word0[23:16]); - xfer_spi(8'h 00); expect(word0[31:24]); - xfer_spi(8'h 00); expect(word1[7:0]); - xfer_spi(8'h 00); expect(word1[15:8]); - xfer_spi(8'h 00); expect(word1[23:16]); - xfer_spi(8'h 00); expect(word1[31:24]); - xfer_end; - - $display("Quad I/O Read (EBh)"); - xfer_begin; - xfer_spi(8'h eb); - xfer_qspi_wr(offset[23:16]); - xfer_qspi_wr(offset[15:8]); - xfer_qspi_wr(offset[7:0]); - xfer_qspi_wr(8'h a5); - repeat (8) xfer_dummy; - xfer_qspi_rd; expect(word0[7:0]); - xfer_qspi_rd; expect(word0[15:8]); - xfer_qspi_rd; expect(word0[23:16]); - xfer_qspi_rd; expect(word0[31:24]); - xfer_qspi_rd; expect(word1[7:0]); - xfer_qspi_rd; expect(word1[15:8]); - xfer_qspi_rd; expect(word1[23:16]); - xfer_qspi_rd; expect(word1[31:24]); - xfer_end; - - $display("Continous Quad I/O Read"); - xfer_begin; - xfer_qspi_wr(offset[23:16]); - xfer_qspi_wr(offset[15:8]); - xfer_qspi_wr(offset[7:0]); - xfer_qspi_wr(8'h ff); - repeat (8) xfer_dummy; - xfer_qspi_rd; expect(word0[7:0]); - xfer_qspi_rd; expect(word0[15:8]); - xfer_qspi_rd; expect(word0[23:16]); - xfer_qspi_rd; expect(word0[31:24]); - xfer_qspi_rd; expect(word1[7:0]); - xfer_qspi_rd; expect(word1[15:8]); - xfer_qspi_rd; expect(word1[23:16]); - xfer_qspi_rd; expect(word1[31:24]); - xfer_end; - - $display("DDR Quad I/O Read (EDh)"); - xfer_begin; - xfer_spi(8'h ed); - xfer_qspi_ddr_wr(offset[23:16]); - xfer_qspi_ddr_wr(offset[15:8]); - xfer_qspi_ddr_wr(offset[7:0]); - xfer_qspi_ddr_wr(8'h a5); - repeat (8) xfer_dummy; - xfer_qspi_ddr_rd; expect(word0[7:0]); - xfer_qspi_ddr_rd; expect(word0[15:8]); - xfer_qspi_ddr_rd; expect(word0[23:16]); - xfer_qspi_ddr_rd; expect(word0[31:24]); - xfer_qspi_ddr_rd; expect(word1[7:0]); - xfer_qspi_ddr_rd; expect(word1[15:8]); - xfer_qspi_ddr_rd; expect(word1[23:16]); - xfer_qspi_ddr_rd; expect(word1[31:24]); - xfer_end; - - $display("Continous DDR Quad I/O Read"); - xfer_begin; - xfer_qspi_ddr_wr(offset[23:16]); - xfer_qspi_ddr_wr(offset[15:8]); - xfer_qspi_ddr_wr(offset[7:0]); - xfer_qspi_ddr_wr(8'h ff); - repeat (8) xfer_dummy; - xfer_qspi_ddr_rd; expect(word0[7:0]); - xfer_qspi_ddr_rd; expect(word0[15:8]); - xfer_qspi_ddr_rd; expect(word0[23:16]); - xfer_qspi_ddr_rd; expect(word0[31:24]); - xfer_qspi_ddr_rd; expect(word1[7:0]); - xfer_qspi_ddr_rd; expect(word1[15:8]); - xfer_qspi_ddr_rd; expect(word1[23:16]); - xfer_qspi_ddr_rd; expect(word1[31:24]); - xfer_end; - - #5; - - if (errcount) begin - $display("FAIL"); - $stop; - end else begin - $display("PASS"); - end - end -endmodule diff --git a/picosoc/spimemio.v b/picosoc/spimemio.v deleted file mode 100644 index b4ee446..0000000 --- a/picosoc/spimemio.v +++ /dev/null @@ -1,579 +0,0 @@ -/* - * PicoSoC - A simple example SoC using PicoRV32 - * - * Copyright (C) 2017 Claire Xenia Wolf <claire@yosyshq.com> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -module spimemio ( - input clk, resetn, - - input valid, - output ready, - input [23:0] addr, - output reg [31:0] rdata, - - output flash_csb, - output flash_clk, - - output flash_io0_oe, - output flash_io1_oe, - output flash_io2_oe, - output flash_io3_oe, - - output flash_io0_do, - output flash_io1_do, - output flash_io2_do, - output flash_io3_do, - - input flash_io0_di, - input flash_io1_di, - input flash_io2_di, - input flash_io3_di, - - input [3:0] cfgreg_we, - input [31:0] cfgreg_di, - output [31:0] cfgreg_do -); - reg xfer_resetn; - reg din_valid; - wire din_ready; - reg [7:0] din_data; - reg [3:0] din_tag; - reg din_cont; - reg din_qspi; - reg din_ddr; - reg din_rd; - - wire dout_valid; - wire [7:0] dout_data; - wire [3:0] dout_tag; - - reg [23:0] buffer; - - reg [23:0] rd_addr; - reg rd_valid; - reg rd_wait; - reg rd_inc; - - assign ready = valid && (addr == rd_addr) && rd_valid; - wire jump = valid && !ready && (addr != rd_addr+4) && rd_valid; - - reg softreset; - - reg config_en; // cfgreg[31] - reg config_ddr; // cfgreg[22] - reg config_qspi; // cfgreg[21] - reg config_cont; // cfgreg[20] - reg [3:0] config_dummy; // cfgreg[19:16] - reg [3:0] config_oe; // cfgreg[11:8] - reg config_csb; // cfgreg[5] - reg config_clk; // cfgref[4] - reg [3:0] config_do; // cfgreg[3:0] - - assign cfgreg_do[31] = config_en; - assign cfgreg_do[30:23] = 0; - assign cfgreg_do[22] = config_ddr; - assign cfgreg_do[21] = config_qspi; - assign cfgreg_do[20] = config_cont; - assign cfgreg_do[19:16] = config_dummy; - assign cfgreg_do[15:12] = 0; - assign cfgreg_do[11:8] = {flash_io3_oe, flash_io2_oe, flash_io1_oe, flash_io0_oe}; - assign cfgreg_do[7:6] = 0; - assign cfgreg_do[5] = flash_csb; - assign cfgreg_do[4] = flash_clk; - assign cfgreg_do[3:0] = {flash_io3_di, flash_io2_di, flash_io1_di, flash_io0_di}; - - always @(posedge clk) begin - softreset <= !config_en || cfgreg_we; - if (!resetn) begin - softreset <= 1; - config_en <= 1; - config_csb <= 0; - config_clk <= 0; - config_oe <= 0; - config_do <= 0; - config_ddr <= 0; - config_qspi <= 0; - config_cont <= 0; - config_dummy <= 8; - end else begin - if (cfgreg_we[0]) begin - config_csb <= cfgreg_di[5]; - config_clk <= cfgreg_di[4]; - config_do <= cfgreg_di[3:0]; - end - if (cfgreg_we[1]) begin - config_oe <= cfgreg_di[11:8]; - end - if (cfgreg_we[2]) begin - config_ddr <= cfgreg_di[22]; - config_qspi <= cfgreg_di[21]; - config_cont <= cfgreg_di[20]; - config_dummy <= cfgreg_di[19:16]; - end - if (cfgreg_we[3]) begin - config_en <= cfgreg_di[31]; - end - end - end - - wire xfer_csb; - wire xfer_clk; - - wire xfer_io0_oe; - wire xfer_io1_oe; - wire xfer_io2_oe; - wire xfer_io3_oe; - - wire xfer_io0_do; - wire xfer_io1_do; - wire xfer_io2_do; - wire xfer_io3_do; - - reg xfer_io0_90; - reg xfer_io1_90; - reg xfer_io2_90; - reg xfer_io3_90; - - always @(negedge clk) begin - xfer_io0_90 <= xfer_io0_do; - xfer_io1_90 <= xfer_io1_do; - xfer_io2_90 <= xfer_io2_do; - xfer_io3_90 <= xfer_io3_do; - end - - assign flash_csb = config_en ? xfer_csb : config_csb; - assign flash_clk = config_en ? xfer_clk : config_clk; - - assign flash_io0_oe = config_en ? xfer_io0_oe : config_oe[0]; - assign flash_io1_oe = config_en ? xfer_io1_oe : config_oe[1]; - assign flash_io2_oe = config_en ? xfer_io2_oe : config_oe[2]; - assign flash_io3_oe = config_en ? xfer_io3_oe : config_oe[3]; - - assign flash_io0_do = config_en ? (config_ddr ? xfer_io0_90 : xfer_io0_do) : config_do[0]; - assign flash_io1_do = config_en ? (config_ddr ? xfer_io1_90 : xfer_io1_do) : config_do[1]; - assign flash_io2_do = config_en ? (config_ddr ? xfer_io2_90 : xfer_io2_do) : config_do[2]; - assign flash_io3_do = config_en ? (config_ddr ? xfer_io3_90 : xfer_io3_do) : config_do[3]; - - wire xfer_dspi = din_ddr && !din_qspi; - wire xfer_ddr = din_ddr && din_qspi; - - spimemio_xfer xfer ( - .clk (clk ), - .resetn (xfer_resetn ), - .din_valid (din_valid ), - .din_ready (din_ready ), - .din_data (din_data ), - .din_tag (din_tag ), - .din_cont (din_cont ), - .din_dspi (xfer_dspi ), - .din_qspi (din_qspi ), - .din_ddr (xfer_ddr ), - .din_rd (din_rd ), - .dout_valid (dout_valid ), - .dout_data (dout_data ), - .dout_tag (dout_tag ), - .flash_csb (xfer_csb ), - .flash_clk (xfer_clk ), - .flash_io0_oe (xfer_io0_oe ), - .flash_io1_oe (xfer_io1_oe ), - .flash_io2_oe (xfer_io2_oe ), - .flash_io3_oe (xfer_io3_oe ), - .flash_io0_do (xfer_io0_do ), - .flash_io1_do (xfer_io1_do ), - .flash_io2_do (xfer_io2_do ), - .flash_io3_do (xfer_io3_do ), - .flash_io0_di (flash_io0_di), - .flash_io1_di (flash_io1_di), - .flash_io2_di (flash_io2_di), - .flash_io3_di (flash_io3_di) - ); - - reg [3:0] state; - - always @(posedge clk) begin - xfer_resetn <= 1; - din_valid <= 0; - - if (!resetn || softreset) begin - state <= 0; - xfer_resetn <= 0; - rd_valid <= 0; - din_tag <= 0; - din_cont <= 0; - din_qspi <= 0; - din_ddr <= 0; - din_rd <= 0; - end else begin - if (dout_valid && dout_tag == 1) buffer[ 7: 0] <= dout_data; - if (dout_valid && dout_tag == 2) buffer[15: 8] <= dout_data; - if (dout_valid && dout_tag == 3) buffer[23:16] <= dout_data; - if (dout_valid && dout_tag == 4) begin - rdata <= {dout_data, buffer}; - rd_addr <= rd_inc ? rd_addr + 4 : addr; - rd_valid <= 1; - rd_wait <= rd_inc; - rd_inc <= 1; - end - - if (valid) - rd_wait <= 0; - - case (state) - 0: begin - din_valid <= 1; - din_data <= 8'h ff; - din_tag <= 0; - if (din_ready) begin - din_valid <= 0; - state <= 1; - end - end - 1: begin - if (dout_valid) begin - xfer_resetn <= 0; - state <= 2; - end - end - 2: begin - din_valid <= 1; - din_data <= 8'h ab; - din_tag <= 0; - if (din_ready) begin - din_valid <= 0; - state <= 3; - end - end - 3: begin - if (dout_valid) begin - xfer_resetn <= 0; - state <= 4; - end - end - 4: begin - rd_inc <= 0; - din_valid <= 1; - din_tag <= 0; - case ({config_ddr, config_qspi}) - 2'b11: din_data <= 8'h ED; - 2'b01: din_data <= 8'h EB; - 2'b10: din_data <= 8'h BB; - 2'b00: din_data <= 8'h 03; - endcase - if (din_ready) begin - din_valid <= 0; - state <= 5; - end - end - 5: begin - if (valid && !ready) begin - din_valid <= 1; - din_tag <= 0; - din_data <= addr[23:16]; - din_qspi <= config_qspi; - din_ddr <= config_ddr; - if (din_ready) begin - din_valid <= 0; - state <= 6; - end - end - end - 6: begin - din_valid <= 1; - din_tag <= 0; - din_data <= addr[15:8]; - if (din_ready) begin - din_valid <= 0; - state <= 7; - end - end - 7: begin - din_valid <= 1; - din_tag <= 0; - din_data <= addr[7:0]; - if (din_ready) begin - din_valid <= 0; - din_data <= 0; - state <= config_qspi || config_ddr ? 8 : 9; - end - end - 8: begin - din_valid <= 1; - din_tag <= 0; - din_data <= config_cont ? 8'h A5 : 8'h FF; - if (din_ready) begin - din_rd <= 1; - din_data <= config_dummy; - din_valid <= 0; - state <= 9; - end - end - 9: begin - din_valid <= 1; - din_tag <= 1; - if (din_ready) begin - din_valid <= 0; - state <= 10; - end - end - 10: begin - din_valid <= 1; - din_data <= 8'h 00; - din_tag <= 2; - if (din_ready) begin - din_valid <= 0; - state <= 11; - end - end - 11: begin - din_valid <= 1; - din_tag <= 3; - if (din_ready) begin - din_valid <= 0; - state <= 12; - end - end - 12: begin - if (!rd_wait || valid) begin - din_valid <= 1; - din_tag <= 4; - if (din_ready) begin - din_valid <= 0; - state <= 9; - end - end - end - endcase - - if (jump) begin - rd_inc <= 0; - rd_valid <= 0; - xfer_resetn <= 0; - if (config_cont) begin - state <= 5; - end else begin - state <= 4; - din_qspi <= 0; - din_ddr <= 0; - end - din_rd <= 0; - end - end - end -endmodule - -module spimemio_xfer ( - input clk, resetn, - - input din_valid, - output din_ready, - input [7:0] din_data, - input [3:0] din_tag, - input din_cont, - input din_dspi, - input din_qspi, - input din_ddr, - input din_rd, - - output dout_valid, - output [7:0] dout_data, - output [3:0] dout_tag, - - output reg flash_csb, - output reg flash_clk, - - output reg flash_io0_oe, - output reg flash_io1_oe, - output reg flash_io2_oe, - output reg flash_io3_oe, - - output reg flash_io0_do, - output reg flash_io1_do, - output reg flash_io2_do, - output reg flash_io3_do, - - input flash_io0_di, - input flash_io1_di, - input flash_io2_di, - input flash_io3_di -); - reg [7:0] obuffer; - reg [7:0] ibuffer; - - reg [3:0] count; - reg [3:0] dummy_count; - - reg xfer_cont; - reg xfer_dspi; - reg xfer_qspi; - reg xfer_ddr; - reg xfer_ddr_q; - reg xfer_rd; - reg [3:0] xfer_tag; - reg [3:0] xfer_tag_q; - - reg [7:0] next_obuffer; - reg [7:0] next_ibuffer; - reg [3:0] next_count; - - reg fetch; - reg next_fetch; - reg last_fetch; - - always @(posedge clk) begin - xfer_ddr_q <= xfer_ddr; - xfer_tag_q <= xfer_tag; - end - - assign din_ready = din_valid && resetn && next_fetch; - - assign dout_valid = (xfer_ddr_q ? fetch && !last_fetch : next_fetch && !fetch) && resetn; - assign dout_data = ibuffer; - assign dout_tag = xfer_tag_q; - - always @* begin - flash_io0_oe = 0; - flash_io1_oe = 0; - flash_io2_oe = 0; - flash_io3_oe = 0; - - flash_io0_do = 0; - flash_io1_do = 0; - flash_io2_do = 0; - flash_io3_do = 0; - - next_obuffer = obuffer; - next_ibuffer = ibuffer; - next_count = count; - next_fetch = 0; - - if (dummy_count == 0) begin - casez ({xfer_ddr, xfer_qspi, xfer_dspi}) - 3'b 000: begin - flash_io0_oe = 1; - flash_io0_do = obuffer[7]; - - if (flash_clk) begin - next_obuffer = {obuffer[6:0], 1'b 0}; - next_count = count - |count; - end else begin - next_ibuffer = {ibuffer[6:0], flash_io1_di}; - end - - next_fetch = (next_count == 0); - end - 3'b 01?: begin - flash_io0_oe = !xfer_rd; - flash_io1_oe = !xfer_rd; - flash_io2_oe = !xfer_rd; - flash_io3_oe = !xfer_rd; - - flash_io0_do = obuffer[4]; - flash_io1_do = obuffer[5]; - flash_io2_do = obuffer[6]; - flash_io3_do = obuffer[7]; - - if (flash_clk) begin - next_obuffer = {obuffer[3:0], 4'b 0000}; - next_count = count - {|count, 2'b00}; - end else begin - next_ibuffer = {ibuffer[3:0], flash_io3_di, flash_io2_di, flash_io1_di, flash_io0_di}; - end - - next_fetch = (next_count == 0); - end - 3'b 11?: begin - flash_io0_oe = !xfer_rd; - flash_io1_oe = !xfer_rd; - flash_io2_oe = !xfer_rd; - flash_io3_oe = !xfer_rd; - - flash_io0_do = obuffer[4]; - flash_io1_do = obuffer[5]; - flash_io2_do = obuffer[6]; - flash_io3_do = obuffer[7]; - - next_obuffer = {obuffer[3:0], 4'b 0000}; - next_ibuffer = {ibuffer[3:0], flash_io3_di, flash_io2_di, flash_io1_di, flash_io0_di}; - next_count = count - {|count, 2'b00}; - - next_fetch = (next_count == 0); - end - 3'b ??1: begin - flash_io0_oe = !xfer_rd; - flash_io1_oe = !xfer_rd; - - flash_io0_do = obuffer[6]; - flash_io1_do = obuffer[7]; - - if (flash_clk) begin - next_obuffer = {obuffer[5:0], 2'b 00}; - next_count = count - {|count, 1'b0}; - end else begin - next_ibuffer = {ibuffer[5:0], flash_io1_di, flash_io0_di}; - end - - next_fetch = (next_count == 0); - end - endcase - end - end - - always @(posedge clk) begin - if (!resetn) begin - fetch <= 1; - last_fetch <= 1; - flash_csb <= 1; - flash_clk <= 0; - count <= 0; - dummy_count <= 0; - xfer_tag <= 0; - xfer_cont <= 0; - xfer_dspi <= 0; - xfer_qspi <= 0; - xfer_ddr <= 0; - xfer_rd <= 0; - end else begin - fetch <= next_fetch; - last_fetch <= xfer_ddr ? fetch : 1; - if (dummy_count) begin - flash_clk <= !flash_clk && !flash_csb; - dummy_count <= dummy_count - flash_clk; - end else - if (count) begin - flash_clk <= !flash_clk && !flash_csb; - obuffer <= next_obuffer; - ibuffer <= next_ibuffer; - count <= next_count; - end - if (din_valid && din_ready) begin - flash_csb <= 0; - flash_clk <= 0; - - count <= 8; - dummy_count <= din_rd ? din_data : 0; - obuffer <= din_data; - - xfer_tag <= din_tag; - xfer_cont <= din_cont; - xfer_dspi <= din_dspi; - xfer_qspi <= din_qspi; - xfer_ddr <= din_ddr; - xfer_rd <= din_rd; - end - end - end -endmodule diff --git a/picosoc/start.s b/picosoc/start.s deleted file mode 100644 index e9e18db..0000000 --- a/picosoc/start.s +++ /dev/null @@ -1,159 +0,0 @@ -.section .text - -start: - -# zero-initialize register file -addi x1, zero, 0 -# x2 (sp) is initialized by reset -addi x3, zero, 0 -addi x4, zero, 0 -addi x5, zero, 0 -addi x6, zero, 0 -addi x7, zero, 0 -addi x8, zero, 0 -addi x9, zero, 0 -addi x10, zero, 0 -addi x11, zero, 0 -addi x12, zero, 0 -addi x13, zero, 0 -addi x14, zero, 0 -addi x15, zero, 0 -addi x16, zero, 0 -addi x17, zero, 0 -addi x18, zero, 0 -addi x19, zero, 0 -addi x20, zero, 0 -addi x21, zero, 0 -addi x22, zero, 0 -addi x23, zero, 0 -addi x24, zero, 0 -addi x25, zero, 0 -addi x26, zero, 0 -addi x27, zero, 0 -addi x28, zero, 0 -addi x29, zero, 0 -addi x30, zero, 0 -addi x31, zero, 0 - -# Update LEDs -li a0, 0x03000000 -li a1, 1 -sw a1, 0(a0) - -# zero initialize entire scratchpad memory -li a0, 0x00000000 -setmemloop: -sw a0, 0(a0) -addi a0, a0, 4 -blt a0, sp, setmemloop - -# Update LEDs -li a0, 0x03000000 -li a1, 3 -sw a1, 0(a0) - -# copy data section -la a0, _sidata -la a1, _sdata -la a2, _edata -bge a1, a2, end_init_data -loop_init_data: -lw a3, 0(a0) -sw a3, 0(a1) -addi a0, a0, 4 -addi a1, a1, 4 -blt a1, a2, loop_init_data -end_init_data: - -# Update LEDs -li a0, 0x03000000 -li a1, 7 -sw a1, 0(a0) - -# zero-init bss section -la a0, _sbss -la a1, _ebss -bge a0, a1, end_init_bss -loop_init_bss: -sw zero, 0(a0) -addi a0, a0, 4 -blt a0, a1, loop_init_bss -end_init_bss: - -# Update LEDs -li a0, 0x03000000 -li a1, 15 -sw a1, 0(a0) - -# call main -call main -loop: -j loop - -.global flashio_worker_begin -.global flashio_worker_end - -.balign 4 - -flashio_worker_begin: -# a0 ... data pointer -# a1 ... data length -# a2 ... optional WREN cmd (0 = disable) - -# address of SPI ctrl reg -li t0, 0x02000000 - -# Set CS high, IO0 is output -li t1, 0x120 -sh t1, 0(t0) - -# Enable Manual SPI Ctrl -sb zero, 3(t0) - -# Send optional WREN cmd -beqz a2, flashio_worker_L1 -li t5, 8 -andi t2, a2, 0xff -flashio_worker_L4: -srli t4, t2, 7 -sb t4, 0(t0) -ori t4, t4, 0x10 -sb t4, 0(t0) -slli t2, t2, 1 -andi t2, t2, 0xff -addi t5, t5, -1 -bnez t5, flashio_worker_L4 -sb t1, 0(t0) - -# SPI transfer -flashio_worker_L1: -beqz a1, flashio_worker_L3 -li t5, 8 -lbu t2, 0(a0) -flashio_worker_L2: -srli t4, t2, 7 -sb t4, 0(t0) -ori t4, t4, 0x10 -sb t4, 0(t0) -lbu t4, 0(t0) -andi t4, t4, 2 -srli t4, t4, 1 -slli t2, t2, 1 -or t2, t2, t4 -andi t2, t2, 0xff -addi t5, t5, -1 -bnez t5, flashio_worker_L2 -sb t2, 0(a0) -addi a0, a0, 1 -addi a1, a1, -1 -j flashio_worker_L1 -flashio_worker_L3: - -# Back to MEMIO mode -li t1, 0x80 -sb t1, 3(t0) - -ret - -.balign 4 -flashio_worker_end: |
