GNUmakefile

#######
# makefile for STM8*_StdPeriph_Lib and SDCC compiler
#
# note: paths in this Makefile assume unmodified SPL folder structure
#
# usage:
#   1. if SDCC not in PATH set path -> CC_ROOT
#   2. set correct STM8 device -> DEVICE
#   3. set project paths -> PRJ_ROOT, PRJ_SRC_DIR, PRJ_INC_DIR
#   4. set SPL paths -> SPL_ROOT
#   5. add required SPL modules -> SPL_SOURCE
#   6. add required STM8S_EVAL modules -> EVAL_SOURCE, EVAL_128K_SOURCE, EVAL_COMM_SOURCE
#
#######

# STM8 device (for supported devices see stm8s.h)
DEVICE=STM8S103

PROGRAMMER=stlinkv2

# set compiler path & parameters 
CC_ROOT =
CC      = sdcc
CFLAGS  = -mstm8 -lstm8 --opt-code-size

# set output folder and target name
OUTPUT_DIR = ./build
TARGET     = $(OUTPUT_DIR)/output.hex
OPT_TARGET = $(OUTPUT_DIR)/opt.bin

# set project folder and files (all *.c)
PRJ_ROOT    = ./src
PRJ_SRC_DIR = $(PRJ_ROOT)
PRJ_INC_DIR = $(PRJ_ROOT)/include
PRJ_SOURCE  = $(notdir $(wildcard $(PRJ_SRC_DIR)/*.c))
PRJ_OBJECTS := $(addprefix $(OUTPUT_DIR)/, $(PRJ_SOURCE:.c=.rel))

# set SPL paths
SPL_ROOT    = ./spl
SPL_MAKE_DIR = $(SPL_ROOT)
SPL_INC_DIR = $(SPL_ROOT)/inc
SPL_LIB_DIR = $(SPL_ROOT)/$(DEVICE)
SPL_LIB = spl.lib

# collect all include folders
INCLUDE = -I$(PRJ_SRC_DIR) -I$(SPL_INC_DIR) -I$(PRJ_INC_DIR)

# collect all source directories
VPATH=$(PRJ_SRC_DIR):$(SPL_SRC_DIR)

.PHONY: clean flash flash_opt

all: $(OUTPUT_DIR) $(TARGET) $(SPL_LIB) $(OPT_TARGET)

$(SPL_LIB):
	$(MAKE) -C $(SPL_MAKE_DIR) DEVICE=$(DEVICE)

$(OUTPUT_DIR):
	mkdir -p $(OUTPUT_DIR)

$(OUTPUT_DIR)/%.rel: %.c
	$(CC) $(CFLAGS) $(INCLUDE) -D$(DEVICE) -c $?

$(OUTPUT_DIR)/%.rel: %.c
	$(CC) $(CFLAGS) $(INCLUDE) -D$(DEVICE) -c $? -o $@

$(TARGET): $(PRJ_OBJECTS) $(SPL_LIB)
	$(CC) $(CFLAGS) -o $(TARGET) -L$(SPL_LIB_DIR) -l$(SPL_LIB) $^

clean:
	rm -f $(OUTPUT_DIR)/*
	$(MAKE) -C $(SPL_MAKE_DIR) clean

$(OPT_TARGET):
	echo "00 00 ff 01 fe 00 ff 00 ff 00 ff" | xxd -r -p > $(OPT_TARGET)

flash_opt: $(OPT_TARGET)
	stm8flash -c $(PROGRAMMER) -p stm8s103f3 -s opt -w $(OUTPUT_DIR)/opt.bin

flash: $(TARGET)
	stm8flash -c $(PROGRAMMER) -p stm8s103f3 -s flash -w $(TARGET)