######################################
# target
######################################
TARGET = blinky
PART = EFR32BG22C224F512GM32


######################################
# building variables
######################################
# debug build?
DEBUG = 1
# optimization for size
OPT = -Os


#######################################
# paths
#######################################
# Build path
BUILD_DIR = build

######################################
# source
######################################
# C sources
include emlib.mk
C_SOURCES += \
../../platform/Device/SiliconLabs/EFR32BG22/Source/system_efr32bg22.c \
src/main.c


# ASM sources
LDLIBS1 =  \
../../platform/Device/SiliconLabs/EFR32BG22/Source/GCC/startup_efr32bg22.S

#######################################
# binaries
#######################################
PREFIX = arm-none-eabi-

CC = $(PREFIX)gcc
CP = $(PREFIX)objcopy
SZ = $(PREFIX)size

HEX = $(CP) -O ihex
BIN = $(CP) -O binary -S

#######################################
# CFLAGS
#######################################
# cpu
CPU = \
 -mcpu=cortex-m33 \
 -mthumb \
 -mfpu=fpv5-sp-d16 \
 -mfloat-abi=hard \
 -std=c99 \
 -Wall \
 -Wextra \
 -fdata-sections \
 -ffunction-sections \
 -fomit-frame-pointer \
 -imacros sl_gcc_preinclude.h \
 -mcmse

DEFINES = -D$(PART)

# fpu
FPU = 

# float-abi
FLOAT-ABI =

# mcu
MCU = $(CPU) $(FPU) $(FLOAT-ABI)

# C includes
C_INCLUDES =  \
 -I include -I../../platform/CMSIS/Core/Include \
 -I../../platform/Device/SiliconLabs/EFR32BG22/Include \
 -I../../platform/common/inc \
 -I ../../platform/common/toolchain/inc \
 -I ../../platform/emlib/inc

# compile gcc flags
CFLAGS = $(MCU) $(C_INCLUDES) $(OPT) $(DEFINES)

ifeq ($(DEBUG), 1)
CFLAGS += -g
endif


# Generate dependency information
CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)"


#######################################
# LDFLAGS
#######################################
# link script
LDSCRIPT = ../../platform/Device/SiliconLabs/EFR32BG22/Source/GCC/efr32bg22.ld

# libraries
GROUP_START =-Wl,--start-group
GROUP_END =-Wl,--end-group

PROJECT_LIBS = \
 -lgcc \
 -lc \
 -lm \
 -lnosys


LIBS = $(GROUP_START) $(PROJECT_LIBS) $(GROUP_END)
LIBDIR = 
LDFLAGS =  \
 -mcpu=cortex-m33 \
 -mthumb \
 -mfpu=fpv5-sp-d16 \
 -mfloat-abi=hard \
 -T $(LDSCRIPT) \
 --specs=nano.specs \
 --specs=nosys.specs \
 -Xlinker -Map=$(BUILD_DIR)/$(TARGET).map \
 -Wl,--gc-sections \
 $(LIBS)

# default action: build all
all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).bin


#######################################
# build the application
#######################################
# list of objects
OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
vpath %.c $(sort $(dir $(C_SOURCES)))

# list of ASM program objects
OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.S=.o)))
vpath %.S $(sort $(dir $(ASM_SOURCES)))

$(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)
	$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@

#$(LUAOBJECTS) $(OBJECTS)
$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
	$(CC) $(OBJECTS) $(LDFLAGS) $(LDLIBS1) -o $@
	$(SZ) $@

$(BUILD_DIR)/%.hex: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
	$(HEX) $< $@
	
$(BUILD_DIR)/%.bin: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
	$(BIN) $< $@	
	
$(BUILD_DIR):
	mkdir $@		

#######################################
# Program
#######################################

flash: $(BUILD_DIR)/$(TARGET).bin
	pyocd load --target $(PART) $(BUILD_DIR)/$(TARGET).bin

#######################################
# clean up
#######################################
clean:
	-rm -fR $(BUILD_DIR)
  
#######################################
# dependencies
#######################################
-include $(wildcard $(BUILD_DIR)/*.d)

# *** EOF ***