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串口高速接收命令

于 2022-07-12 发布 文件大小:1.92 kB
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代码说明:

1. //加入以下代码,支持printf函数,而不需要选择use MicroLIB   #if 1 #pragma import(__use_no_semihosting)              //标准库需要的支持函数                  struct __FILE  {  int handle;  };  FILE __stdout;        //定义_sys_exit()以避免使用半主机模式     void _sys_exit(int x)  {  x = x;  }  //重定义fputc函数  int fputc(int ch, FILE *f) {  while((USART1->SR&0X40)==0);//循环发送,直到发送完毕    USART1->DR = (u8) ch;       return ch;

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