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Diffstat (limited to 'picosoc/icebreaker.v')
| -rw-r--r-- | picosoc/icebreaker.v | 151 |
1 files changed, 0 insertions, 151 deletions
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 |