2440平台下linux串口开发源码示例(2440双串口间通信)

/***************************************************************************** 程序说明：示例程序演示了2440平台下linux串口应用开发，可实现2440串口2与串口3的通讯*** 硬件设置：将2440板子上的串口2、3TXD、RXD交叉短接*** 编译运行：在宿主机上编译程序源码，打开超级终端（可与2440进行命令交互），***                在2440平台上打开串口终端，设置端口为ttySAC1，B15200，8bit DATA*** 结果验证：Com communicate start                      please send data to me
                      The data you send back
                      have reveived data
                      succeed!and com was closed**************************************************************************/#include<stdio.h>
#include<string.h>
#include<sys/types.h>
#include<errno.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>
#include<termio.h>
#include<stdlib.h>int set_opt(int fd,int nSpeed,int nBits,char nEvent,int nStop);int open_port(int fd,int comport); int main(void)
{     int fd;
       int nread,i;
       char vcCom_start[]="Com communicate start\n";
       char vcCom_wait[]="please send data to me\n";
       char vcCom_rece[20];
       char vcCom_OKmsg[]="have reveived data\n";
       char vcCom_over[]="succeed!and com was closed