message: add make bmp for black magic probe flashing
diff: @@ -166,6 +166,12 @@ flash: $(BUILD_DIR)/$(TARGET).elf
  gdb: $(BUILD_DIR)/$(TARGET).elf
  arm-none-eabi-gdb $(BUILD_DIR)/$(TARGET).elf -x openocd.gdbinit
  +bmp: $(BUILD_DIR)/$(TARGET).elf
  + arm-none-eabi-gdb --ex 'target extended-remote /dev/stlink' \
  + --ex 'monitor swdp_scan' \
  + --ex 'attach 1' \
  + --ex 'load' $(BUILD_DIR)/$(TARGET).elf
  +
  #######################################
  # dependencies
  #######################################
  