Merge dshot300

dshot300/Makefile

@@ -0,0 +1,79 @@
+#
+# Copyright: Oleg Borodin <onborodin@gmail.com> 2018
+#
+
+.SECONDARY:
+
+CFLAGS+= -I. -Os  -DSTM32F4 -std=c99
+#CFLAGS+= -mthumb
+#CFLAGS+= -march=armv7e-m
+CFLAGS+= -mfloat-abi=hard
+#CFLAGS+= -mfpu=fpv4-sp-d16
+CFLAGS+= -mcpu=cortex-m4
+CFLAGS+= -fno-common -ffunction-sections -fdata-sections
+CFLAGS+= -g -gdwarf-2
+CFLAGS+= -Wall
+
+LDFLAGS+= ${CFLAGS}
+LDFLAGS+= --static
+#LDFLAGS+= -nostartfiles
+LDFLAGS+= -T main.ld
+
+LDFLAGS+= -Wl,-Map=main.map
+LDFLAGS+= -Wl,--cref -Wl,--gc-sections
+LDFLAGS+= -lopencm3_stm32f4
+LDFLAGS+= -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
+
+TARGET= arm-eabi
+
+all: main.bin
+
+OBJS+= main.o
+
+main.elf: $(OBJS)
+	$(TARGET)-gcc $(^F) $(LDFLAGS) -o $@
+	$(TARGET)-size --format=berkeley $@
+
+%.o: %.c
+	$(TARGET)-gcc $(CFLAGS) -c -o $@ $<
+
+%.o: %.S
+	$(TARGET)-as $(ASFLAGS) -o $@ $<
+
+%.bin: %.elf
+	$(TARGET)-objcopy -O binary $< $@
+
+%.elf: %.o
+	$(TARGET)-gcc $(^F) $(LDFLAGS) -o $@
+	$(TARGET)-size --format=berkeley $@
+
+clean:
+	rm -f *.i *.o *.elf *.bin *.map *~ *.hex *.d *.s
+
+flash: main.bin
+	@openocd \
+	    -c 'puts "--- START --------------------"' \
+	    -f 'interface/stlink.cfg' \
+	    -f 'target/stm32f4x.cfg'  \
+	    -c 'puts "--- INIT --------------------"' \
+	    -c "init" \
+	    -c "reset halt" \
+	    -c 'puts "--- WRITE --------------------"' \
+	    -c "flash write_image erase $< 0x08000000"\
+	    -c 'puts "--- VERIFY --------------------"' \
+	    -c "verify_image $<" \
+	    -c 'puts "--- RESET --------------------"' \
+	    -c "reset" \
+	    -c 'puts "--- DONE --------------------"' \
+	    -c "shutdown"
+
+debug: main.bin
+	@openocd \
+	    -c 'puts "--- START --------------------"' \
+	    -f 'interface/stlink.cfg' \
+	    -f 'target/stm32f4x.cfg'  \
+	    -c 'puts "--- INIT --------------------"' \
+	    -c "init" \
+	    -c "halt" \
+	    -c "poll"
+#EOF