实验效果3-TCP服务器+OLED

1 拷贝显示驱动代码

1.1 拷贝源代码

拷贝HARDWARE文件夹，里面包括OLED.c/.h和移植好的U8g2csrc文件夹

1.2 将源代码添加到工程

将代码分别添加到工程的User/OLED组和User/U8G2组（所有.c文件都添加）

1.3 修改代码优化等级

这里添加的好多文件用不到，需要把代码优化等级调整到Level 1

1.4 添加头文件路径

..\HARDWARE\oled
..\HARDWARE\U8g2csrc

1.5 修改STM32CubeMX工程

只需要添加3个控制引脚，SPI和W5500是共用的

2 修改源代码

源代码全部在main.c里面修改

2.1 添加头文件

/* USER CODE BEGIN Includes */
#include <string.h>
#include <stdio.h>
#include "w5500_spi.h"
#include "wizchip_conf.h"
#include "socket.h"
#include "OLED.h"
#include "u8g2_app.h"
/* USER CODE END Includes */

2.2 main函数修改

局部变量

/* USER CODE BEGIN 1 */u8g2_t u8g2;char draw_buf[20];
/* USER CODE END 1 */

显示初始化

  /* USER CODE BEGIN 2 */OLED_RST_Set();//OLED初始化HAL_Delay(100);OLED_RST_Clr();HAL_Delay(200);OLED_RST_Set();OLED_Init();u8g2Init(&u8g2);//U8G2初始化u8g2_FirstPage(&u8g2);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draw_waitcable(&u8g2);//OLED提示：等待网线连接PHYStatusCheck();                                //检查网络连接状态PrintPHYConf();                                  //打印PHY配置信息printf("Simple TCP Server Application\r\n");draw_waitclient(&u8g2);//OLED提示：等待客户端连接/* USER CODE END 2 */

主循环
添加的代码部分有“OLED提示：”注释

/* Infinite loop *//* USER CODE BEGIN WHILE */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 successif(socket(1,Sn_MR_TCP,LISTEN_PORT,0)!=1)//创建一个socket：Socket号，TCP/UDP类型，端口号{//errorprintf("Cannot create Socket!\r\n");while(1);//halt here}//successprintf("Socket Created Successfully ! \r\n");uint8_t socket_io_mode=SOCK_IO_BLOCK;ctlsocket(1, CS_SET_IOMODE , &socket_io_mode);//set blocking IO modeprintf("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");memset(draw_buf,0,20);snprintf(draw_buf,20,"%d.%d.%d.%d:%d",gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3],LISTEN_PORT);draw_server(&u8g2,draw_buf);//OLED提示：等待客户端连接//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)//errorprintf("Cannot listen on port %d",LISTEN_PORT);while(1);}uint8_t sr=0x00;//socket status registerdo{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 socketprintf("A client connected!\r\n");printf("Waiting for Client Data ...!\r\n");draw_conn_client(&u8g2);//OLED提示：客户端连接while(1){int len=recv(1, receive_buff, RECEIVE_BUFF_SIZE);//从连接设备读取数据到receive_buffif(len==SOCKERR_SOCKSTATUS){//client has disconnectedprintf("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);//        memset(draw_buf,0,20);
//        snprintf(draw_buf,20,"%d.%d.%d.%d:%d",gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3],LISTEN_PORT);draw_waitdata(&u8g2,(char *)receive_buff);//OLED提示：显示接收数据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 [] pairsend(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 receivedif(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");memset(draw_buf,0,20);snprintf(draw_buf,20,"%d.%d.%d.%d:%d",gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3],LISTEN_PORT);draw_server(&u8g2,draw_buf);//OLED提示：等待客户端连接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 */

3 实验测试效果