diff options
Diffstat (limited to 'picorv32/scripts/vivado/firmware.c')
-rw-r--r-- | picorv32/scripts/vivado/firmware.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/picorv32/scripts/vivado/firmware.c b/picorv32/scripts/vivado/firmware.c new file mode 100644 index 0000000..6c62169 --- /dev/null +++ b/picorv32/scripts/vivado/firmware.c @@ -0,0 +1,43 @@ +void putc(char c) +{ + *(volatile char*)0x10000000 = c; +} + +void puts(const char *s) +{ + while (*s) putc(*s++); +} + +void *memcpy(void *dest, const void *src, int n) +{ + while (n) { + n--; + ((char*)dest)[n] = ((char*)src)[n]; + } + return dest; +} + +void main() +{ + char message[] = "$Uryyb+Jbeyq!+Vs+lbh+pna+ernq+guvf+zrffntr+gura$gur+CvpbEI32+PCH" + "+frrzf+gb+or+jbexvat+whfg+svar.$$++++++++++++++++GRFG+CNFFRQ!$$"; + for (int i = 0; message[i]; i++) + switch (message[i]) + { + case 'a' ... 'm': + case 'A' ... 'M': + message[i] += 13; + break; + case 'n' ... 'z': + case 'N' ... 'Z': + message[i] -= 13; + break; + case '$': + message[i] = '\n'; + break; + case '+': + message[i] = ' '; + break; + } + puts(message); +} |