实验效果1-TCP服务器

实验效果2-TCP客户端

1 制作STM32CubeMX工程文件生成MDK工程

拷贝001_Ping.ioc到002_TCP文件夹，并重命名为002_TCP.ioc，重新生成MDK工程

2 添加W5500驱动库文件

3 添加头文件目录

4 实例1-TCP服务器

4.1 修改main.c代码

只列举和上一个例子不同地方的代码，其他可以参照001_Ping例子

STM32+W5500+以太网应用开发+001_Ping 新建工程，移植驱动-程序员宅基地

/* USER CODE BEGIN PTD */
#define LISTEN_PORT 5000
#define RECEIVE_BUFF_SIZE 128

wiz_NetInfo gWIZNETINFO = {
    
  .mac = {
     0x80, 0x80, 0x80,0x80,0x80,0x80 },//MSB - LSB
  .ip  = {
     192, 168, 1, 10 },
  .sn  = {
     255, 255, 255, 0 },
  .gw  = {
     192, 168, 1, 1 },//网关参数
  .dns  = {
     8, 8, 8, 8 },
  .dhcp = NETINFO_STATIC };
uint8_t receive_buff[RECEIVE_BUFF_SIZE];
/* USER CODE END PTD */

/* USER CODE BEGIN 2 */
  printf("A simple TCP Server Application using W5500!\r\n");
  W5500Init();                                     //W5500初始化
  ctlnetwork(CN_SET_NETINFO, (void*)&gWIZNETINFO); //配置网络参数
  
  wiz_PhyConf phyconf;
  phyconf.by = PHY_CONFBY_SW;
  phyconf.duplex = PHY_DUPLEX_FULL;
  phyconf.speed = PHY_SPEED_10;
  phyconf.mode = PHY_MODE_AUTONEGO;
  ctlwizchip(CW_SET_PHYCONF, (void*)&phyconf);     //配置PHY参数
  
  PHYStatusCheck();                                //检查网络连接状态
  PrintPHYConf();                                  //打印PHY配置信息
  printf("Simple TCP Server Application\r\n");
  /* USER CODE END 2 */

while (1)
  {
    
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    printf("\r\nInitializing server socket\r\n");

	  //Parameters in order socket_id, protocol TCP or UDP, Port number, Flags=0
	  //Return value is socket ID on success
	  if(socket(1,Sn_MR_TCP,LISTEN_PORT,0)!=1)//创建一个socket：Socket号，TCP/UDP类型，端口号
	  {
    
		  //error
		  printf("Cannot create Socket!\r\n");
		  while(1);//halt here
	  }

	  //success
	  printf("Socket Created Successfully ! \r\n");

	  uint8_t socket_io_mode=SOCK_IO_BLOCK;

	  ctlsocket(1, CS_SET_IOMODE , &socket_io_mode);//set blocking IO mode

    printf("IP Address is %d.%d.%d.%d\r\n",gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3]);
	  printf("Start listening on port %d ! \r\n",LISTEN_PORT);
	  printf("Waiting for a client connection. \r\n");

	  //Make it a passive socket (i.e. listen for connection)
	  if(listen(1)!=SOCK_OK)//监听端口
	  {
    //our socket id is 1 (w5500 have 8 sockets from 0-7)
		  //error
		  printf("Cannot listen on port %d",LISTEN_PORT);
		  while(1);
	  }

	  uint8_t sr=0x00;//socket status register

	  do
	  {
    
		  sr=getSn_SR(1);//获取Sn_SR寄存器，参数0~7 
	  }while (sr!=SOCK_ESTABLISHED && sr!=SOCK_CLOSED);

	  if(sr==SOCK_CLOSED)
	  {
    
		  printf("Some error occurred on server socket. Please restart.\r\n");
		  while(1);
	  }

	  if(sr==SOCK_ESTABLISHED)//成功连接
	  {
    
		  //we come here only when a client has connected.
		  //Now we can read data from the socket
		  printf("A client connected!\r\n");
		  printf("Waiting for Client Data ...!\r\n");

		  while(1)
		  {
    
			  int len=recv(1, receive_buff, RECEIVE_BUFF_SIZE);//从连接设备读取数据到receive_buff

			  if(len==SOCKERR_SOCKSTATUS)
			  {
    
				  //client has disconnected
				  printf("Client has disconnected\r\n");
				  printf("*** SESSION OVER ***\r\n\r\n");
				  break;
			  }

			  receive_buff[len]='\0';

			  printf("Received %d bytes from client\r\n",len);
			  printf("Data Received: %s", receive_buff);

        if(strcmp((char*)receive_buff,"Who are u")==0)
			  {
    //判断接收到"Who are u"
				  memcpy(receive_buff,"I am role_2099!",15);//修改应答内容
          len = 15;
			  }
			  //Echo the data back encloused in a [] pair
			  send(1,(uint8_t*)"[",1);//starting sq bracket 向客户端发送[
			  send(1,receive_buff,len);// the data          向客户端发送接收到的内容或者特定的回答
			  send(1,(uint8_t*)"]",1);//closing sq bracket  向客户端发送]

			  printf("\r\nECHO sent back to client\r\n");

			  //Look for quit message and quit if received
			  if(strcmp((char*)receive_buff,"QUIT")==0)
			  {
    //收到"QUIT"，端口客户端连接
				  printf("Received QUIT command from client\r\n");
				  printf("Disconnecting ... \r\n");
				  printf("*** SESSION OVER ***\r\n\r\n");
				  disconnect(1);//disconnect from the clinet 断开客户端连接
				  break;//come out of while loop 退出，回到131行，重新等待客户端连接
			  }

		  }//While loop (as long as client is connected)

	  }//if block, client connect success
  }
  /* USER CODE END 3 */

4.2 测试

1> ping测试，确认通信正常

2> 客户端未连接时log信息

3> 使用网络调试助手配置为客户端，远程主机地址是开发板IP地址，端口号5000

4> 连接成功

5 实例2-TCP客户端

5.1 修改main.c代码

/* USER CODE BEGIN PTD */
uint8_t destination_ip[]={
    192,168,1,20}; //远程主机地址
uint16_t destination_port = 5000;        //远程主机端口

#define LISTEN_PORT 5000 //本地主机端口
#define RECEIVE_BUFF_SIZE 128

wiz_NetInfo gWIZNETINFO = {
    
  .mac = {
     0x80, 0x80, 0x80,0x80,0x80,0x80 },//MSB - LSB
  .ip  = {
     192, 168, 1, 10 },  //IP地址
  .sn  = {
     255, 255, 255, 0 }, //子网掩码
  .gw  = {
     192, 168, 1, 1 },   //网关参数
  .dns  = {
     8, 8, 8, 8 },      //DNS
  .dhcp = NETINFO_STATIC };    //DHCP关闭
uint8_t receive_buff[RECEIVE_BUFF_SIZE];
/* USER CODE END PTD */

/* USER CODE BEGIN 2 */
  printf("A simple TCP Client Application using W5500!\r\n");
  W5500Init();                                     //W5500初始化
  ctlnetwork(CN_SET_NETINFO, (void*)&gWIZNETINFO); //配置网络参数
  
  wiz_PhyConf phyconf;
  phyconf.by = PHY_CONFBY_SW;
  phyconf.duplex = PHY_DUPLEX_FULL;
  phyconf.speed = PHY_SPEED_10;
  phyconf.mode = PHY_MODE_AUTONEGO;
  ctlwizchip(CW_SET_PHYCONF, (void*)&phyconf);     //配置PHY参数
  
  PHYStatusCheck();                                //检查网络连接状态
  PrintPHYConf();                                  //打印PHY配置信息
  printf("Simple TCP Client Application\r\n");
  /* USER CODE END 2 */

while (1)
  {
    
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    
    //The return value of socket() call is the socket number if success
    //we are using socket number 1 so it should return 1 for success
    //The 3rd argument is the local port, when a client app is written
    //better give 0 here, that will use a random available port
    if(socket(1, Sn_MR_TCP, 0, 0)==1) //创建Socket=1
    {
    
      printf("\r\nSocket Created Successfully");
    }
    else
    {
    
      printf("\r\nCannot create socket");
      while(1);
    }

    printf("\r\nConnecting to server: %d.%d.%d.%d @ TCP Port: %d",destination_ip[0],destination_ip[1],destination_ip[2],destination_ip[3],destination_port);
    if(connect(1, destination_ip, destination_port)==SOCK_OK) //连接远程主机
    {
    
      printf("\r\nConnected with server.");
    }
    else
    {
    
      //failed
      printf("\r\nCannot connect with server!");
      while(1);
    }

    while (1)
    {
    
      //Return value of the send() function is the amount of data sent
      if(send(1, "I am role_2099!\r\n", 16)<=SOCK_ERROR) //向服务器发送数据I am role_2099
      {
    
        printf("\r\nSending Failed!");
        while(1);

      }
      else
      {
    
        printf("\r\nSending Success!");
      }

      HAL_Delay(1000);
    }
  }
  /* USER CODE END 3 */

5.2 测试

1> 电脑端没有开启程序指定的服务器和端口

2> 网络调试助手配置，并开启服务器

3> 重新启动开发板，电脑端收到来自TCP客户端发来的信息