Initial commit: basic infrastructure

Makefile

@@ -0,0 +1,180 @@
+# --- START OF CONFIG ---------------------------------------------------
+# Edit the following variables for your own needs
+
+# toolchain configuration
+PREFIX  ?= arm-none-eabi-
+CC       = $(PREFIX)gcc
+LD       = $(PREFIX)gcc
+OBJCOPY  = $(PREFIX)objcopy
+OBJDUMP  = $(PREFIX)objdump
+GDB      = $(PREFIX)gdb
+SIZE     = $(PREFIX)size
+
+OOCD = openocd
+OOCD_CFG = ./oocd/tinyfancontrol.cfg
+
+TOOLCHAIN_DIR ?= /usr/arm-none-eabi
+OPENCM3_DIR ?= ./libopencm3
+
+# default build configuration
+# "make BUILD=release" does a release build
+BUILD:=debug
+
+# basic build flags configuration
+CFLAGS+=-Wall -std=c99 -pedantic -Wextra -Wimplicit-function-declaration \
+        -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
+        -Wundef -Wshadow \
+        -fno-common -ffunction-sections -fdata-sections -mcpu=cortex-m0 -mthumb \
+        -mfloat-abi=soft -MD -DSTM32L0
+
+LDFLAGS+=--static \
+         -L$(OPENCM3_DIR)/lib \
+         -nostartfiles -Wl,--gc-sections \
+         -mthumb -mcpu=cortex-m0 -mthumb -mfloat-abi=soft
+
+# the LD script (RAM-only does not work because the code is too large)
+#LDFLAGS+=-Tldscripts/tinyfancontrol-$(BUILD).ld
+LDFLAGS+=-Tldscripts/tinyfancontrol-release.ld
+
+# Flags for libopencm3
+CFLAGS+=-I$(OPENCM3_DIR)/include
+LDFLAGS+=-L$(OPENCM3_DIR)/lib -lopencm3_stm32l0
+
+# Flags for fxplib
+CFLAGS+=-Ifxplib/include -DPOINTPOS=16
+LDFLAGS+=-Lfxplib/lib/$(BUILD) -lfxp_stm32l0
+
+# generic linking
+LDFLAGS+=-Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
+
+# build type specific flags
+CFLAGS_debug=-O0 -ggdb -DDEBUG
+LDFLAGS_debug=
+
+CFLAGS_release=-Os -ggdb
+LDFLAGS_release=
+
+# target configuration
+TARGET := tinyfancontrol
+VERSION := $(shell git describe --always)
+
+# source files for the project
+SOURCE := $(shell find src/ -name '*.c')
+INCLUDES := $(shell find src/ -name '*.h')
+
+# additional dependencies for build (proper targets must be specified by user)
+DEPS := build_libfxp
+
+# default target
+all: $(TARGET)
+
+# user-specific targets
+export CFLAGS
+export BUILD
+export PREFIX
+export POSTFIX = stm32l0
+build_libfxp:
+	cd fxplib && $(MAKE)
+
+# --- END OF CONFIG -----------------------------------------------------
+
+OBJ1=$(patsubst %.c, %.o, $(SOURCE))
+OBJ=$(patsubst src/%, obj/$(BUILD)/%, $(OBJ1))
+
+VERSIONSTR="\"$(VERSION)\""
+
+CFLAGS+=-DVERSION=$(VERSIONSTR)
+
+TARGET_BASE := bin/$(BUILD)/$(TARGET)
+
+CFLAGS+=$(CFLAGS_$(BUILD))
+LDFLAGS+=$(LDFLAGS_$(BUILD))
+
+.PHONY show_cflags:
+	@echo --- Build parameters:  ------------------------------------------
+	@echo CFLAGS\=$(CFLAGS)
+	@echo LDFLAGS\=$(LDFLAGS)
+	@echo SOURCE\=$(SOURCE)
+	@echo -----------------------------------------------------------------
+
+$(TARGET): show_cflags $(TARGET_BASE).elf $(TARGET_BASE).hex \
+	         $(TARGET_BASE).lss $(TARGET_BASE).bin
+	@$(SIZE) $(TARGET_BASE).elf
+	@echo ">>> $(BUILD) build complete."
+
+$(TARGET_BASE).elf: $(DEPS) $(OBJ) $(INCLUDES) Makefile
+	@echo Linking $@ ...
+	@mkdir -p $(shell dirname $@)
+	@$(LD) -o $(TARGET_BASE).elf $(OBJ) $(LDFLAGS)
+
+$(TARGET_BASE).hex: $(TARGET_BASE).elf
+	@echo "Generating $@ ..."
+	@$(OBJCOPY) -Oihex $< $@
+
+$(TARGET_BASE).bin: $(TARGET_BASE).elf
+	@echo "Generating $@ ..."
+	@$(OBJCOPY) -Obinary $< $@
+
+$(TARGET_BASE).lss: $(TARGET_BASE).elf
+	@echo "Generating $@ ..."
+	@$(OBJDUMP) -S $< > $@
+
+obj/$(BUILD)/%.o: src/%.c $(INCLUDES) Makefile
+	@echo "Compiling $< ..."
+	@mkdir -p $(shell dirname $@)
+	@$(CC) -c $(CFLAGS) -o $@ $<
+
+clean:
+	rm -f $(TARGET_BASE).elf
+	rm -f $(TARGET_BASE).hex
+	rm -f $(TARGET_BASE).lss
+	rm -f $(TARGET_BASE).bin
+	rm -f $(OBJ)
+
+program: program_jlink
+
+reset: reset_jlink
+
+/tmp/jlink_prog_script: Makefile
+	echo "Device STM32F030C8" > $@
+	echo "connect" >> $@
+	echo "S" >> $@
+	echo "4000" >> $@
+	echo "loadfile $(TARGET_BASE).hex" >> $@
+	echo "r" >> $@
+	echo "g" >> $@
+	echo "exit" >> $@
+
+/tmp/jlink_rst_script: Makefile
+	echo "Device STM32F030C8" > $@
+	echo "connect" >> $@
+	echo "S" >> $@
+	echo "4000" >> $@
+	echo "r" >> $@
+	echo "g" >> $@
+	echo "exit" >> $@
+
+program_jlink: /tmp/jlink_prog_script $(TARGET_BASE).hex
+	JLinkExe </tmp/jlink_prog_script
+
+reset_jlink: /tmp/jlink_rst_script
+	JLinkExe </tmp/jlink_rst_script
+
+program_release: $(TARGET_BASE).hex
+	$(OOCD) -f $(OOCD_CFG) \
+		-c "init" \
+		-c "reset halt" \
+		-c "flash write_image erase $(TARGET_BASE).hex" \
+		-c "resume 0x08000000" \
+		-c "shutdown"
+
+program_debug: $(TARGET_BASE).hex
+	$(OOCD) -f $(OOCD_CFG) \
+		-c "init" \
+		-c "reset halt" \
+		-c "load_image $(TARGET_BASE).hex" \
+		-c "resume `arm-none-eabi-readelf -h bin/debug/$(TARGET).elf | awk '/Entry/{print $$4;}'`" \
+		-c "shutdown"
+
+debug: $(TARGET_BASE).hex
+	JLinkGDBServerCLExe -device STM32F030K6 -if SWD