学步园

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<sys/types.h>

#include<unistd.h>

#include<errno.h>

#include<sys/stat.h>

#include<fcntl.h>

#include<termios.h>

int main(void)

{

       int fd;

       int nread,i;

       char buff[]="Hello\n";

       if((fd=open_port(fd,1))<0)

       {//设置串口

              perror("open_port error");

              return;

       }

       if((i=set_opt(fd,115200,8,'N',1))<0)

       {//设置串口

              perror("set_opt error");

              return;

       }

       printf("fd=%d\n",fd);

       fd=3;

       nread=read(fd,buff,8);//读串口

       printf("nread=%d,%s\n",nread,buff);

       close(fd);

       return;

}