SRCS := \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_adc.c \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_clk.c \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_flash.c \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_gpio.c \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_pwr.c \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_sys.c \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_timer0.c \
  CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_timer3.c \
  CH5xx_ble_firmware_library/RVMSIS/core_riscv.c \
  CH5xx_ble_firmware_library/Startup/startup_CH583.S \
  $(wildcard src/*.c) \
  $(wildcard src/*/*.c)

OUTPUTS = $(patsubst %.S,build/%.o,$(patsubst %.c,build/%.o, $(SRCS)))

PREFIX ?= riscv-none-embed-
CC = "$(PREFIX)gcc"
OBJCOPY = "$(PREFIX)objcopy"

CFLAGS += -march=rv32imac -mabi=ilp32 -msmall-data-limit=8
CFLAGS += -Os
CFLAGS +=  \
  -ICH5xx_ble_firmware_library/StdPeriphDriver/inc \
  -ICH5xx_ble_firmware_library/RVMSIS \
  -ICH5xx_ble_firmware_library/Core \
  -ICH5xx_ble_firmware_library/BLE

CFLAGS += -MMD -MP -Wall -fdata-sections -ffunction-sections -Werror=implicit-function-declaration

LDFLAGS = -march=rv32imac -mabi=ilp32 -msmall-data-limit=8 \
	-lc -lm -lnosys \
	./CH5xx_ble_firmware_library/StdPeriphDriver/libISP583.a \
	./CH5xx_ble_firmware_library/BLE/LIBCH58xBLE.a \
	-T CH5xx_ble_firmware_library/Ld/Link.ld -nostartfiles -Xlinker --gc-sections

all: build/badgewitch.elf build/badgewitch.bin

build/%.o: %.c
	@mkdir -p $(dir $@)
	$(CC) -c $(CFLAGS) $< -o $@

build/%.o: %.S
	@mkdir -p $(dir $@)
	$(CC) -c $(CFLAGS) $< -o $@

build/badgewitch.elf: $(OUTPUTS)
	@mkdir -pv $(dir $@)
	$(CC) $(OUTPUTS) $(LDFLAGS) -o $@

build/%.bin: build/%.elf
	$(OBJCOPY) -O binary -S $< $@

flash: build/badgewitch.bin
	wchisp flash build/badgewitch.bin

clean:
	rm -rf build

-include $(OUTPUTS:%.o=%.d)