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picorv32
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Improved firmware for vivado "system" example

This commit is contained in:
Clifford Wolf 2015-07-16 11:10:02 +02:00
parent 0249d538fa
commit d8c3157bf8
5 changed files with 41 additions and 9 deletions
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2
Makefile
View File

@ -43,7 +43,7 @@ synth.v: picorv32.v scripts/yosys/synth_sim.ys
yosys -qv3 -l synth.log scripts/yosys/synth_sim.ys
firmware/firmware.hex: firmware/firmware.bin firmware/makehex.py
python3 firmware/makehex.py $< > $@
python3 firmware/makehex.py $< 16384 > $@
firmware/firmware.bin: firmware/firmware.elf
$(TOOLCHAIN_PREFIX)objcopy -O binary $< $@

2
dhrystone/Makefile
View File

@ -18,7 +18,7 @@ timing.exe: testbench.v ../picorv32.v
chmod -x timing.exe
dhry.hex: dhry.bin ../firmware/makehex.py
python3 ../firmware/makehex.py $< > $@
python3 ../firmware/makehex.py $< 16384 > $@
dhry.bin: dhry.elf
riscv64-unknown-elf-objcopy -O binary $< $@

9
firmware/makehex.py
View File

@ -9,13 +9,16 @@
from sys import argv
with open(argv[1], "rb") as f:
binfile = argv[1]
nwords = int(argv[2])
with open(binfile, "rb") as f:
bindata = f.read()
assert len(bindata) < 60*1024
assert len(bindata) < 4*nwords
assert len(bindata) % 4 == 0
for i in range(64*1024//4):
for i in range(nwords):
if i < len(bindata) // 4:
w = bindata[4*i : 4*i+4]
print("%02x%02x%02x%02x" % (w[3], w[2], w[1], w[0]))

6
scripts/vivado/Makefile
View File

@ -38,9 +38,9 @@ sim_system:
firmware.hex: firmware.S firmware.c firmware.lds
$(TOOLCHAIN_PREFIX)gcc -Os -m32 -ffreestanding -nostdlib -o firmware.elf firmware.S firmware.c \
-Wl,-Bstatic,-T,firmware.lds,-Map,firmware.map,--strip-debug -lgcc
--std=gnu99 -Wl,-Bstatic,-T,firmware.lds,-Map,firmware.map,--strip-debug -lgcc
$(TOOLCHAIN_PREFIX)objcopy -O binary firmware.elf firmware.bin
python3 ../../firmware/makehex.py firmware.bin > firmware.hex
python3 ../../firmware/makehex.py firmware.bin 4096 > firmware.hex
tab_%/results.txt:
bash tabtest.sh $@
@ -58,5 +58,5 @@ table.txt:
clean:
rm -rf .Xil/ firmware.bin firmware.elf firmware.hex firmware.map synth_*.log
rm -rf synth_*.mmi synth_*.bit synth_system.v table.txt tab_*/ webtalk.jou
rm -rf webtalk.log webtalk_*.jou webtalk_*.log xelab.* xsim.* xvlog.*
rm -rf webtalk.log webtalk_*.jou webtalk_*.log xelab.* xsim[._]* xvlog.*

31
scripts/vivado/firmware.c
View File

@ -8,7 +8,36 @@ 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()
{
puts("Hello World!\n");
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);
}