Error: L6915E: Library reports error: __use_no_semihosting was requested, but _sys_open was referenced
报错信息：
.\out\SWM341_stdperiph_lib.axf: Error: L6915E: Library reports error: __use_no_semihosting was requested, but _sys_open was referenced解决办法：
配置项目-》Target》Code Genration=》把Use MicroLIB给勾选中。
