网关--串口接收数据转送到网口发送到PC机
先上代码吧：
/*--------------------------------------------------------------
日期：2012/1/1
功能：串口接收转发到网络
--------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rs232.h"
#include <errno.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <signal.h>
#define PORT 3000
//#define PACKET_SIZE 8192
#define PACKET_SIZE 6
static int count=0;
static unsigned int second;
static unsigned int sum;
void display()
{
printf("\n");
printf("Transfer complete !\n");
printf("Total size:%d !\n",sum);
printf("Speed:%d Mbps\n",8*sum/second/0x100000);
exit(0);
}
/*-----------------------------------------
client 192.168.2.111 –t 1 –p 1
argv[0] = client
argv[1] = 172.16.22.155
argv[2] = –t
argv[3] = 1
argv[4] = -p
argv[5] = 1
------------------------------------------*/
void Tcp()
{
int argc_data;
char *argv_data[6];
int sockfd;
int recv_bytes;
//unsigned int buf[PACKET_SIZE];
unsigned int *Tcp_buf;
struct hostent *he;
struct sockaddr_in srvaddr;
unsigned int uiip;
unsigned int nsecond,packet_size;
sum=0;
argc_data = 6;
argv_data[0] = "client";
argv_data[1] = "172.16.22.155";
argv_data[2] = "-t";
argv_data[3] = "1";
argv_data[4] = "-p";
argv_data[5] = "1";
if(argc_data< 4 ){
perror("Usage: client <hostIP> -t time -p PACKET_SIZE\n");
exit(2);
}
packet_size=PACKET_SIZE;
second=atoi(argv_data[3]);
if(argc_data==6)
packet_size=atoi(argv_data[5]);
printf("packet_size=%d\n",packet_size);
Tcp_buf = malloc(packet_size);
he=gethostbyname(argv_data[1]);
sockfd=socket(AF_INET,SOCK_STREAM,0);
bzero(&srvaddr,sizeof(srvaddr));
srvaddr.sin_family=AF_INET;
srvaddr.sin_port=htons(PORT);
srvaddr.sin_addr=*((struct in_addr *)he->h_addr);
//aiptoi(argv[1],&uiip);
//srvaddr.sin_addr.s_addr=uiip;
if(connect(sockfd,
(struct sockaddr *) &srvaddr, sizeof(struct sockaddr))== -1){
perror("Connect error!\n");
exit(1);
}
// nsecond = htonl(second);
nsecond = 0x01020304;
if(write(sockfd,&nsecond,sizeof(nsecond))== -1){
perror("Error when send second!\n");
exit(1);
}
printf("Data Transfering!\n");
/* while (1){
if((recv_bytes=read(sockfd,buf,packet_size))<=0){
printf("Connection closed!\n");
break;
}
sum+=recv_bytes;
}
*/
while(1)
{
write(sockfd, &nsecond, sizeof(nsecond));
sleep(5);
}
close(sockfd);
free(Tcp_buf);
display();
//return 0;
}
main(int argc, char *argv[])
{
int ret,portno,nWritten,nRead;
char buf[5] = "hell";
/*网口实现部分*/
int argc_data;
char *argv_data[6];
int sockfd;
int recv_bytes;
//unsigned int buf[PACKET_SIZE];
unsigned int *Tcp_buf;
struct hostent *he;
struct sockaddr_in srvaddr;
unsigned int uiip;
unsigned int nsecond,packet_size;
sum=0;
argc_data = 6;
argv_data[0] = "client";
argv_data[1] = "172.16.22.155";
argv_data[2] = "-t";
argv_data[3] = "1";
argv_data[4] = "-p";
argv_data[5] = "1";
portno=0;
if(argc_data< 4 ){
perror("Usage: client <hostIP> -t time -p PACKET_SIZE\n");
exit(2);
}
packet_size=PACKET_SIZE;
second=atoi(argv_data[3]);
if(argc_data==6)
packet_size=atoi(argv_data[5]);
printf("packet_size=%d\n",packet_size);
Tcp_buf = malloc(packet_size);
he=gethostbyname(argv_data[1]);
sockfd=socket(AF_INET,SOCK_STREAM,0);
bzero(&srvaddr,sizeof(srvaddr));
srvaddr.sin_family=AF_INET;
srvaddr.sin_port=htons(PORT);
srvaddr.sin_addr=*((struct in_addr *)he->h_addr);
//aiptoi(argv[1],&uiip);
//srvaddr.sin_addr.s_addr=uiip;
if(connect(sockfd,
(struct sockaddr *) &srvaddr, sizeof(struct sockaddr))== -1){
perror("Connect error!\n");
exit(1);
}
// nsecond = htonl(second);
/*
nsecond = 0x01020304;
if(write(sockfd,&nsecond,sizeof(nsecond))== -1){
perror("Error when send second!\n");
exit(1);
}
printf("Data Transfering!\n");
*/
/* while (1){
if((recv_bytes=read(sockfd,buf,packet_size))<=0){
printf("Connection closed!\n");
break;
}
sum+=recv_bytes;
}
*/
/*while(1)
{
write(sockfd, &nsecond, sizeof(nsecond));
sleep(5);
}
close(sockfd);
free(Tcp_buf);
display();
*/
//return 0;
/*--------------------------------------------------------------------*/
while(1)
{
ret=OpenCom(portno,"/dev/ttyS1",115200);
if(ret==-1)
{
perror("The /dev/ttyS1 open error.");
exit(1);
}
/* while(1)
{
nWritten=ComWrt(portno,"abc",3);
}
*/
printf("\n/dev/ttyS1 has send %d chars!\n",nWritten);
printf("\nRecieving data!***\n");
fflush(stdout);
//buf[5] = "hell";
while(1)
{
/*nRead=ComRd(0,buf,256,3000);
if(nRead>0)
{
printf("*****OK\n");
nWritten = ComWrt(portno, buf, sizeof(buf));
}*/
printf("******start***********\n");
printf("*****ComRd*****\n");
//ComRd(0, buf, 256, 3000);
nRead = ComRd(0, buf, 256, 3000);
if(nRead > 0)
{
printf("The Rddata is: %s\n",buf);
/*---串口部分-----*/
ComWrt(portno, buf, sizeof(buf));
printf("The ComWrt data is: %s\n",buf);
/*网口部分*/
//nsecond = 0x01020304;
if(write(sockfd,buf,sizeof(buf))== -1)
{
perror("Error when send second!\n");
exit(1);
}
//printf("Data Transfering!\n");
write(sockfd, buf, sizeof(buf));
printf("send to sockfd :%s\n",buf);
sleep(1);
printf("*****************end*****************\n");
}
/* else
printf("Timeout\n");
*/
}
if((ret=CloseCom(portno)==-1))
{
perror("Close com");
exit(1);
}
printf("\n\n");
}
printf("Exit now.\n");
/*网口部分*/
close(sockfd);
//free(Tcp_buf);
display();
/*----------------------------------*/
return;
}
上面就是全部的主程序代码了
还有一个是RS232串口部分的代码：
/*
** File: rs232.c
**
** Description:
** Provides an RS-232 interface that is very similar to the CVI provided
** interface library
*/
#include <stdio.h>
#include <assert.h>
#include "rs232.h"
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#define DEBUG
struct PortInfo ports[MAX_PORTS];
/*
** Function: OpenCom
**
** Description:
** Opens a serial port with default parameters
**
** Arguments:
** portNo - handle used for further access
** deviceName - the name of the device to open
**
** Returns:
** -1 on failure
*/
int OpenCom(int portNo, const char deviceName[],long baudRate)
{
return OpenComConfig(portNo, deviceName, baudRate, 1, 8, 1, 0, 0);
}
/*
*/
long GetBaudRate(long baudRate)
{
long BaudR;
switch(baudRate)
{
case 115200:
BaudR=B115200;
break;
case 57600:
BaudR=B57600;
break;
case 19200:
BaudR=B19200;
break;
case 9600:
BaudR=B9600;
break;
default:
BaudR=B0;
}
return BaudR;
}
/*
** Function: OpenComConfig
**
** Description:
** Opens a serial port with the specified parameters
**
** Arguments:
** portNo - handle used for further access
** deviceName - the name of the device to open
** baudRate - rate to open (57600 for example)
** parity - 0 for no parity
** dataBits - 7 or 8
** stopBits - 1 or 2
** iqSize - ignored
** oqSize - ignored
**
** Returns:
** -1 on failure
**
** Limitations:
** parity, stopBits, iqSize, and oqSize are ignored
*/
int OpenComConfig(int port,
const char deviceName[],
long baudRate,
int parity,
int dataBits,
int stopBits,
int iqSize,
int oqSize)
{
struct termios newtio;
long BaudR;
ports[port].busy = 1;
strcpy(ports[port].name,deviceName);
if ((ports[port].handle = open(deviceName, O_RDWR, 0666)) == -1)
{
perror("open");
// assert(0);
}
/* set the port to raw I/O */
newtio.c_cflag = CS8 | CLOCAL | CREAD ;
newtio.c_iflag = IGNPAR;
// newtio.c_oflag = 0;
// newtio.c_lflag = 0;
newtio.c_oflag = ~OPOST;
newtio.c_lflag = ~(ICANON | ECHO | ECHOE | ISIG);
newtio.c_cc[VINTR] = 0;
newtio.c_cc[VQUIT] = 0;
newtio.c_cc[VERASE] = 0;
newtio.c_cc[VKILL] = 0;
newtio.c_cc[VEOF] = 4;
newtio.c_cc[VTIME] = 0;
newtio.c_cc[VMIN] = 1;
newtio.c_cc[VSWTC] = 0;
newtio.c_cc[VSTART] = 0;
newtio.c_cc[VSTOP] = 0;
newtio.c_cc[VSUSP] = 0;
newtio.c_cc[VEOL] = 0;
newtio.c_cc[VREPRINT] = 0;
newtio.c_cc[VDISCARD] = 0;
newtio.c_cc[VWERASE] = 0;
newtio.c_cc[VLNEXT] = 0;
newtio.c_cc[VEOL2] = 0;
cfsetospeed(&newtio, GetBaudRate(baudRate));
cfsetispeed(&newtio, GetBaudRate(baudRate));
tcsetattr(ports[port].handle, TCSANOW, &newtio);
return 0;
}
/*
** Function: CloseCom
**
** Description:
** Closes a previously opened port
**
** Arguments:
** The port handle to close
**
** Returns:
** -1 on failure
*/
int CloseCom(int portNo)
{
if (ports[portNo].busy)
{
close(ports[portNo].handle);
ports[portNo].busy = 0;
return 0;
}
else
{
return -1;
}
}
/*
** Function: ComRd
**
** Description:
** Reads the specified number of bytes from the port.
** Returns when these bytes have been read, or timeout occurs.
**
** Arguments:
** portNo - the handle
** buf - where to store the data
** maxCnt - the maximum number of bytes to read
**
** Returns:
** The actual number of bytes read
*/
int ComRd(int portNo, char buf[], int maxCnt,int Timeout)
{
int actualRead = 0;
fd_set rfds;
struct timeval tv;
int retval;
if (!ports[portNo].busy)
{
assert(0);
}
/* camp on the port until data appears or 5 seconds have passed */
FD_ZERO(&rfds);
FD_SET(ports[portNo].handle, &rfds);
tv.tv_sec = Timeout/1000;
tv.tv_usec = (Timeout%1000)*1000;
retval = select(16, &rfds, NULL, NULL, &tv);
if (retval)
{
actualRead = read(ports[portNo].handle, buf, maxCnt);
}
#ifdef DEBUG
if(actualRead>0)
{
unsigned int i;
for (i = 0; i < actualRead; ++i)
{
if ((buf[i] > 0x20) && (buf[i] < 0x7f))
{
// printf("<'%c'", buf[i]);
printf("%c",buf[i]);
}
else
{
// printf("<%02X", buf[i]);
printf("%02X",buf[i]);
}
}
printf("\n");
}
fflush(stdout);
#endif /* DEBUG */
return actualRead;
}
/*
** Function: ComWrt
**
** Description:
** Writes out the specified bytes to the port
**
** Arguments:
** portNo - the handle of the port
** buf - the bytes to write
** maxCnt - how many to write
**
** Returns:
** The actual number of bytes written
*/
int ComWrt(int portNo, const char *buf, int maxCnt)
{
int written;
if (!ports[portNo].busy)
{
assert(0);
}
#ifdef DEBUG
{
int i;
for (i = 0; i < maxCnt; ++i)
{
if ((buf[i] > 0x20) && (buf[i] < 0x7f))
{
// printf(">'%c'", buf[i]);
printf("%c",buf[i]);
}
else
{
// printf(">%02X", buf[i]);
printf("%02X",buf[i]);
}
}
printf("\n");
}
fflush(stdout);
#endif /* DEBUG */
written = write(ports[portNo].handle, buf, maxCnt);
return written;
}
然后再看头文件：
#ifndef _RS232_H_
#define _RS232_H_
/* the maximum number of ports we are willing to open */
#define MAX_PORTS 4
/*this array hold information about each port we have opened */
struct PortInfo{
int busy;
char name[32];
int handle;
};
int OpenCom(int portNo,const char deviceName[],long baudRate);
int CloseCom(int portNo);
int ComRd(int portNo,char buf[],int maxCnt,int Timeout);
int ComWrt(int portNo,const char * buf,int maxCnt);
//long GetBaudRate(long baudRate);
//int OpenComConfig(int port,
// const char deviceName[],
// long baudRate,
// int parity,
// int dataBits,
// int stopBits,
// int iqSize,
// int oqSize);
#endif
再看效果图：
