From 4dfd9fba71548b182f71fbe0e4538ae03393c10e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Thu, 25 Feb 2021 16:51:54 +0100
Subject: [PATCH] add Makefile to compile firmware

---
 Makefile | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 Makefile

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..777e6f6
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,84 @@
+BINARY = identifier
+
+DEFS       += -DSTM32F1
+FP_FLAGS   ?= -msoft-float
+ARCH_FLAGS = -mthumb -mcpu=cortex-m3 $(FP_FLAGS) -mfix-cortex-m3-ldrd
+
+PREFIX  ?= arm-none-eabi-
+CC      := $(PREFIX)gcc
+CXX     := $(PREFIX)g++
+LD      := $(PREFIX)gcc
+AR      := $(PREFIX)ar
+AS      := $(PREFIX)as
+OBJCOPY := $(PREFIX)objcopy
+OBJDUMP := $(PREFIX)objdump
+GDB     := $(PREFIX)gdb
+
+OPENCM3_DIR ?= ./libopencm3
+DEFS     += -I$(OPENCM3_DIR)/include
+LDFLAGS  += -L$(OPENCM3_DIR)/lib
+LIBNAME  = opencm3_stm32f1
+LDLIBS   += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
+LDLIBS   += -l$(LIBNAME)
+LDSCRIPT ?= $(OPENCM3_DIR)/lib/stm32/f1/stm32f103x8.ld
+LDFLAGS  += --static -nostartfiles
+LDFLAGS  += -T$(LDSCRIPT)
+LDFLAGS  += $(ARCH_FLAGS) $(DEBUG)
+
+OPT    := -Os
+DEBUG  := -ggdb3
+CSTD   ?= -std=c99
+CFLAGS += $(OPT) $(CSTD) $(DEBUG)
+CFLAGS += $(ARCH_FLAGS)
+CFLAGS += $(DEFS)
+CFLAGS += -Wpedantic -Wall -Werror -Wundef -Wextra -Wshadow -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes -Wstrict-overflow=5
+CFLAGS += -fno-common -ffunction-sections -fdata-sections
+
+# SWD TAP ID (0x1ba01477 for STM32, 0x2ba01477 for most other clones)
+CPUTAPID ?= 0x1ba01477
+# serial port to flash using UART bootloader
+PORT = /dev/ttyUSB0
+
+OBJS += $(BINARY).o
+GENERATED_BINARIES = $(BINARY).elf $(BINARY).bin $(BINARY).hex
+
+all: elf bin hex
+
+elf: $(BINARY).elf
+bin: $(BINARY).bin
+hex: $(BINARY).hex
+
+$(OPENCM3_DIR)/lib/lib$(LIBNAME).a:
+ifeq (,$(wildcard $@))
+	$(warning $(LIBNAME).a not found, attempting to rebuild in $(OPENCM3_DIR))
+	$(MAKE) -C $(OPENCM3_DIR)
+endif
+
+%.bin: %.elf
+	$(OBJCOPY) -Obinary $(*).elf $(*).bin
+
+%.hex: %.elf
+	$(OBJCOPY) -Oihex $(*).elf $(*).hex
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $(*).o -c $(*).c
+
+%.elf: $(OBJS) $(LDSCRIPT) $(OPENCM3_DIR)/lib/lib$(LIBNAME).a
+	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(*).elf
+	size $(*).elf
+
+flash_swd: $(BINARY).hex
+	openocd --file interface/stlink.cfg --command 'transport select hla_swd' --command 'set CPUTAPID $(CPUTAPID)' --file target/stm32f1x.cfg --command 'adapter speed 100' --command 'init' --command 'halt' --command 'reset init' --command 'flash write_image erase $<' --command 'reset' --command 'shutdown'
+
+flash: $(BINARY).hex
+	stm32flash /dev/ttyUSB0 -w $< -R || stm32flash /dev/ttyUSB0 -w $< -R
+
+debug: $(BINARY).elf
+	 arm-none-eabi-gdb --eval-command='target remote | openocd --file interface/stlink.cfg --command "transport select hla_swd" --command "set CPUTAPID $(CPUTAPID)" --file target/stm32f1x.cfg --command "gdb_port pipe; log_output /dev/null; init"' $<
+
+clean:
+	$(RM) $(GENERATED_BINARIES) generated.* $(OBJS) $(OBJS:%.o=%.d)
+
+.PHONY: clean elf bin hex
+
+-include $(OBJS:.o=.d)