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)


BUILDDIR = build/$(PLATFORM)

ifeq ($(PLATFORM),badgemagic)
CFLAGS += -DPLATFORM_BADGEMAGIC
else ifeq ($(PLATFORM),ls32-usbc)
CFLAGS += -DPLATFORM_LS32_USBC
else ifeq ($(PLATFORM),ls32-microusb)
CFLAGS += -DPLATFORM_LS32_MICROUSB
else
_ERROR=Unknown PLATFORM $(PLATFORM)
ifeq ($(PLATFORM),)
_ERROR=Select a PLATFORM
endif
$(error "$(_ERROR) (valid platforms: badgemagic, ls32-usbc, ls32-microusb)")
endif


OUTPUTS = $(patsubst %.S,$(BUILDDIR)/%.o,$(patsubst %.c,$(BUILDDIR)/%.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/$(PLATFORM).bin

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

$(BUILDDIR)/%.o: %.S
	@mkdir -p $(dir $@)
	@echo "AS $@"
	@$(CC) -c $(CFLAGS) $< -o $@

$(BUILDDIR)/badgewitch.elf: $(OUTPUTS)
	@mkdir -pv $(dir $@)
	@echo "LD $@"
	@$(CC) $(OUTPUTS) $(LDFLAGS) -o $@

build/%.bin: build/%/badgewitch.elf
	@echo "ELF -> BIN $<"
	@$(OBJCOPY) -O binary -S $< $@

flash: build/$(PLATFORM).bin
	wchisp flash build/$(PLATFORM).bin

clean:
	rm -rf build

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