.POSIX:

TARGET  = arm-none-eabi
CC      = $(TARGET)-gcc      # compiler
AR      = $(TARGET)-ar       # for building static libs
OBJCOPY = $(TARGET)-objcopy  # to strip debug symbols

CFLAGS_MCU = -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16

.SUFFIXES : .c .o .dbg .bin

.dbg.bin :
	$(OBJCOPY) -O binary $< $@

CFLAGS_CMSIS = -I. \
			   -Icmsis/CMSIS/Core/Include \
               -Icmsis/CMSIS/Driver/Include \
			   -Icmsis/CMSIS/RTOS2/Include \
			   -Icmsis-driver-validation/Include

CFLAGS_CMSIS_DFP = -DCMSIS_device_header='"stm32f4xx.h"' \
                   -DSTM32F411xE \
                   -Icmsis-dfp-stm32f4/Include

CFLAGS = -std=c99 -pedantic -Wall -Wextra -g3 -gdwarf-3 -ggdb -O0 \
		 --specs=picolibc.specs $(CFLAGS_MCU) \
		 $(CFLAGS_CMSIS) $(CFLAGS_CMSIS_DFP)

LDFLAGS = -L. \
		  -Tgcc_arm.ld \
		  --oslib=semihost \
		  -Wl,--print-memory-usage

LDLIBS = -lcmsis-driver-validate -lcmsis-driver

all : demo_gpio.bin cmsis-validate.bin

demo_gpio.dbg : demo_gpio.c libcmsis-driver.a gcc_arm.ld
	$(CC) $(CFLAGS) demo_gpio.c $(LDFLAGS) -o $@ $(LDLIBS)

libcmsis-driver.a : gpio.o sram_vtor.o debounce.o system_stm32f4xx.o
	$(AR) r $@ $?

## Tests ###################################################

CFLAGS += -DRTE_CMSIS_DV_GPIO -DRTE_CMSIS_DV_PACK_VER='"3.1.0"' -DRTE_CMSIS_RTOS2

VALIDATION_OBJS = DV_Framework.o DV_Report.o DV_GPIO.o cmsis_dv.o

$(VALIDATION_OBJS) : DV_GPIO_Config.h Makefile

libcmsis-driver-validate.a : $(VALIDATION_OBJS)
	$(AR) r $@ $?

cmsis-validate.dbg : cmsis-validate.c libcmsis-driver.a libcmsis-driver-validate.a gcc_arm.ld
	$(CC) $(CFLAGS) cmsis-validate.c $(LDFLAGS) -o $@ $(LDLIBS)

# our debug binary, which depends on three things

VPATH = cmsis-dfp-stm32f4/Source/Templates:cmsis-driver-validation/Source:freertos:freertos/portable/GCC/ARM_CM4F


## utilities ###############################################

.PHONY:
clean :
	rm -f *.[ao] *.dbg *.bin