80024a7d4b6d001d1abbddeb07d1d3a2

在开发FPGA上比较有用

#include <stdio.h>
#include <string.h>

int main()
{
  char *msg="Detected the character:[a]\n";
  FILE *fp;
  char prompt = 0;
  
  // 打开串口设备文件
  fp=fopen("/dev/uart","r+");
  
  if(fp)
  {
    while(prompt !='v')
    {
      prompt = getc(fp); // 从UART取一个字符
      msg[24]=prompt;
      fwrite(msg,strlen(msg),1,fp); // 回显
    }  
    
    fprintf(fp,"Closing the UART file.\n");
    fclose(fp);
  }
  
  return 0;
}