树莓派串口TCP透传

ID:313227 · 发表于 2018-4-21 17:33

此代码用于解决有些朋友想通过树莓派连接单片机，并和单片机双向数据透传，电脑或者手机均可以通过tcp的方式连接到树莓派并直接与单片机通信。完整工程请下载附件，进入debug目录make即可
/*
============================================================================
Name       : test.c
Author    : Zhitao Lyu
Version    :
Copyright : Your copyright notice
Description : Hello World in C, Ansi-style
============================================================================
*/

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

#include "sys/types.h"
#include "sys/stat.h"
#include <dirent.h>
//#include<sys/socket.h>
#include "common.h"

int accept_cmd(int fd_tcp,int fd_serial,struct sockaddr_in *addr_ser)
{
socklen_t sin_size = sizeof(struct sockaddr_in);
struct sockaddr_in add_cli;
socket_t sockfd_Cli=0;
unsigned char recvline[BuffSize+1]="";
int n=0;
bzero(&add_cli,sizeof(add_cli));
sockfd_Cli=accept(fd_tcp, (struct sockaddr *)(&add_cli), &sin_size);
printf("Accept from IP: %s\n",inet_ntoa(add_cli.sin_addr));
while(1)//per buff
{
n=recv_nb(sockfd_Cli,recvline,BuffSize);
if(n>0){
writeserial(fd_serial, recvline, n, NULL);
}
else if(n==0)sleepms(10);
else if(n<0)break;//end connection
   n=readserial(fd_serial,recvline, BuffSize, NULL);
   if(n>0) send(sockfd_Cli,recvline,n,0);
}
bzero(&add_cli,sizeof(add_cli));
return 0;
}
int main(int argc,char *argv[]) {
int err=0;
int fd_tcp=0;
int Port=5221;
struct sockaddr_in addr_ser;

int fd_serial=0;
if(argc>1)
{
Port=atoi(argv[1]);
if(Port<1024)
Port=5221;
}

fd_tcp=opentcpserver(&addr_ser,Port);
if(fd_tcp==-1){
printf("open tcpsever err\n");
return 0;
}
else{
printf("Start Listening,Port=%d\r\n",Port);
}
//open serial

fd_serial= openserial(SERIAL_PATH);
if(fd_serial==-1)
{
close(fd_tcp);
printf("openserial err msg:%d\r\n",err);
      return 0;
}
err=setserial(fd_serial,4,8,'n',1);//9600 8 n 1
if(err==-1)
{
close(fd_tcp);
close(fd_serial);
printf("setserial err msg:%d\r\n",err);
      return 0;
}

while(1)
{
err=accept_cmd(fd_tcp,fd_serial,&addr_ser);
if(err==8)break;
printf("Accept msg:%d\n",err);
}
close(fd_tcp);
close(fd_serial);
printf("Bye!\r\n");
return 0;
}

ID:511468 · 发表于 2019-4-13 20:11

感谢大佬贡献，下载用用，帮顶。

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