ttytest.c

嵌入式Linux下的串口通信例程

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rs232.h"

main(int argc, char *argv[])
{
	int ret,portno,nWritten,nRead,i;
	char buf[256];
	portno=1;
	
	//open ttys1
	ret=OpenCom(portno,"/dev/ttyS1",115200);
		if(ret==-1)
		{
			perror("The /dev/ttyS1 open error.");
			exit(1);
		}
		
	//loop for read		
	while(1)
	{
		nRead=ComRd(portno,buf,256,1000);
		if(nRead>0)
		{
			for(i=0;i<nRead;i++)
				printf("%c",buf[i]);
		}
	}
	
	//close ttys1	
	if((ret=CloseCom(portno)==-1))
		{
			perror("Close com");
			exit(1);
		}
	printf("\n\n");
	printf("Exit now.\n");
	return(1);
}