#include <stdio.h>#include <stdlib.h>#include <string.h>#include "rs232.h"int main(int argc, char *argv[]){	int ret,portno,nWritten,nRead;	char buf[256];	portno=0;	while(1)	{		ret=OpenCom(portno,"/dev/ttyS1",115200);		if(ret==-1)		{			perror("The /dev/ttyS1 open error.");			exit(1);		}		nWritten=ComWrt(portno,"abc",3);		printf("/dev/ttyS1 has send %d chars!\n",nWritten);		printf("\nRecieving data!**");		fflush(stdout);		nRead=ComRd(0,buf,256,3000);		if(nRead>0)		{			printf("*****OK\n");		}		else			printf("Timeout\n");		if((ret=CloseCom(portno)==-1))		{			perror("Close com");			exit(1);		}		printf("\n\n");	}	printf("Exit now.\n");	return;}