Start bluepill skeleton and blinky project.
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# configurables
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OBJS := blinky.o
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TARGET := blinky
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# targets
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ELF := $(TARGET).elf
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BIN := $(TARGET).bin
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# toolchain setup
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ARMTC := arm-none-eabi
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ARMCC := $(ARMTC)-gcc
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CC := $(ARMCC)
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LD := $(ARMCC)
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ARMSIZE := $(ARMTC)-size
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OBJCOPY := $(ARMTC)-objcopy
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# compiler options
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CPUFLAGS := -mcpu=cortex-m3 -mthumb
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CFLAGS := -Wall -Wextra -Os -MD $(CPUFLAGS)
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LDFLAGS := $(CPUFLAGS) -nostartfiles -Wl,-T,bluepill.ld
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LDLIBS := -lc -lnosys
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# programmer options
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STARTMEM := 0x8000000
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# targets
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.PHONY: all
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all: $(BIN)
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$(ELF): $(OBJS)
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$(ARMCC) $(LDFLAGS) -o $@ $(OBJS) $(LDLIBS)
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$(ARMSIZE) -A $@
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$(BIN): $(ELF)
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$(OBJCOPY) -O binary $< $@
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.PHONY: flash
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flash: $(BIN)
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st-flash write $(BIN) $(STARTMEM)
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.PHONY: erase
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erase:
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st-flash erase
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.PHONY: install
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install: erase flash
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.PHONY: clean
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clean:
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rm -f *.o *.bin *.elf *.d *.map
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/* based on example from https://github.com/satoshinm/pill_blink */
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static inline void
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delay(unsigned long ms)
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{
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for (unsigned long i = 0; i < ms; ++i) __asm__("nop");
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}
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static inline void
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led_off() {
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(*(volatile unsigned int *)(0x40011010)) = (1 << 13);
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}
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static inline void
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led_on() {
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(*(volatile unsigned int *)(0x40011014)) = (1 << 13);
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}
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void __attribute__ ((weak, naked)) reset_handler(void) {
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(*(volatile unsigned int *)(0x40021018)) |= (1 << 4);
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(*(volatile unsigned int *)(0x40011004)) |= (0x00 << (((13 - 8) * 4) + 2));
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(*(volatile unsigned int *)(0x40011004)) |= (0x02 << ((13 - 8) * 4));
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while(1) {
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led_off();
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delay(1000000);
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led_on();
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delay(100000);
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led_off();
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delay(100000);
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led_on();
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delay(100000);
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}
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}
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__attribute__ ((section(".vectors")))
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struct {
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unsigned int *initial_sp_value;
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void (*reset)(void);
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void (*nmi)(void);
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void (*hard_fault)(void);
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void (*memory_manage_fault)(void);
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void (*bus_fault)(void);
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void (*usage_fault)(void);
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void (*reserved_x001c[4])(void);
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void (*sv_call)(void);
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void (*debug_monitor)(void);
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void (*reserved_x0034)(void);
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void (*pend_sv)(void);
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void (*systick)(void);
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void (*irq[68])(void);
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} vector_table = {
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.reset = reset_handler,
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};
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/* from https://github.com/satoshinm/pill_blink/ */
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MEMORY
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{
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rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
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ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
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}
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EXTERN(vector_table);
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ENTRY(reset_handler);
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SECTIONS
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{
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.text : {
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*(.vectors)
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*(.text*)
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. = ALIGN(4);
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} >rom
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}
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BOARD:
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+-+-+-+-+-+
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4 3 2 1
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1: ground (black)
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2: SWCLK (white)
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3: SWDIO (grey)
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4: 3V3 (purple)
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@ -0,0 +1,52 @@
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# configurables
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OBJS :=
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TARGET :=
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# targets
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ELF := $(TARGET).elf
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BIN := $(TARGET).bin
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# toolchain setup
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ARMTC := arm-none-eabi
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ARMCC := $(ARMTC)-gcc
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CC := $(ARMCC)
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LD := $(ARMCC)
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ARMSIZE := $(ARMTC)-size
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OBJCOPY := $(ARMTC)-objcopy
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# compiler options
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CPUFLAGS := -mcpu=cortex-m3 -mthumb
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CFLAGS := -Wall -Wextra -Os -MD $(CPUFLAGS)
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LDFLAGS := $(CPUFLAGS) -nostartfiles -Wl,-T,bluepill.ld
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LDLIBS := -lc -lnosys
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# programmer options
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STARTMEM := 0x8000000
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# targets
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.PHONY: all
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all: $(BIN)
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$(ELF): $(OBJS)
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$(ARMCC) $(LDFLAGS) -o $@ $(OBJS) $(LDLIBS)
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$(ARMSIZE) -A $@
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$(BIN): $(ELF)
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$(OBJCOPY) -O binary $< $@
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.PHONY: flash
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flash: $(BIN)
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st-flash write $(BIN) $(STARTMEM)
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.PHONY: erase
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erase:
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st-flash erase
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.PHONY: install
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install: erase flash
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.PHONY: clean
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clean:
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rm -f *.o *.bin *.elf *.d *.map
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@ -0,0 +1,19 @@
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# from https://github.com/satoshinm/pill_blink/
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MEMORY
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{
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rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
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ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
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}
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EXTERN(vector_table);
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ENTRY(reset_handler);
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SECTIONS
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{
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.text : {
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*(.vectors)
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*(.text*)
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. = ALIGN(4);
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} >rom
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}
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