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all: build
build: octedit.uf2
octedit.uf2: octedit.bin
echo -ne "\x55\x46\x32\x0A" > octedit.uf2 # Magic 0
echo -ne "\x57\x51\x5D\x9E" >> octedit.uf2 # Magic 1
echo -ne "\x00\x20\x00\x00" >> octedit.uf2 # Flags
echo -ne "\x00\x00\x00\x10" >> octedit.uf2 # Load address
echo -ne "\x00\x01\x00\x00" >> octedit.uf2 # Data size
echo -ne "\x00\x00\x00\x00" >> octedit.uf2 # Block number
echo -ne "\x01\x00\x00\x00" >> octedit.uf2 # Number of blocks
echo -ne "\x56\xFF\x8B\xE4" >> octedit.uf2 # RP2040 family ID
cat octedit.bin >> octedit.uf2 # Data
printf %220s | tr " " "\0" >> octedit.uf2 # 0 padding
echo -ne "\x30\x6F\xB1\x0A" >> octedit.uf2 # Magic end
octedit.bin: octedit.elf crc32
arm-none-eabi-objcopy -O binary octedit.elf octedit.bin
./crc32 < octedit.bin >> octedit.bin
crc32: crc32.c
gcc crc32.c -o crc32
objects = setup.o octedit.o uart.o
octedit.elf: $(objects) pico_persist.ld
arm-none-eabi-ld -T pico_persist.ld -o octedit.elf $(objects)
$(objects): %.o: %.s
arm-none-eabi-as -o $@ $<
clean:
rm octedit.elf octedit.bin octedit.uf2 *.o crc32
flash: octedit.uf2
[ -h /dev/disk/by-label/RPI-RP2 ] || sleep 3s
cat octedit.uf2 > /dev/disk/by-label/RPI-RP2
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