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all: build
build: echo.uf2
echo.uf2: echo.elf
../elf/elf2uf2 echo.elf echo.uf2
objects = main.o xosc.o clocks.o gpio.o uart.o
echo.elf: $(objects)
arm-none-eabi-ld -T pico_ram_only.ld -o echo.elf $(objects)
$(objects): %.o: %.s
arm-none-eabi-as -o $@ $<
clean:
rm echo.elf echo.uf2 *.o
flash: echo.uf2
[ -h /dev/disk/by-label/RPI-RP2 ] || sleep 2s
cat echo.uf2 > /dev/disk/by-label/RPI-RP2
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