在上一篇文章中讲了“如何通过MCU配置S2E为UDP模式”,相信小伙伴们已经了解了S2E的基本功能,在这一篇中,我们再接再厉,继续学习一下“如何通过MCU配置S2E为TCP Server的工作模式”,无论是配置UDP模式还是配置TCP模式,都是通过串口转以太网的方式实现的:
1、接线方式
2、例程说明
打开“通过MCU配置S2E为TCP Server例程”,主程序中第一部分TIM3_Init();是设定一个帧中断的时间定时器,这是因为该例程MCU的串口是通过帧中断来接收AT命令配置S2E后返回的数据的。
第二部分USARTX_Init();初始化MCU用到的串口,这里用USART1_Config();是printf功能,用于查看调试信息。USART2_Config();用于配置S2E,需要注意的是该串口的配置参数需要同S2E的串口配置参数一致,否则配置失败。
第三部分主循环中的TCP_Server_Mode();用于配置S2E为TCP Server模式。S2E的AT命令列表详见各个S2E型号的用户手册AT命令章节介绍。配置成功,串口打印“TCP Server Config Success!”,配置失败串口打印“TCP Server Config Fail!”。
/**************************************************** 函数名: TCP_Server_Mode 形参: 无 返回值: 无 函数功能: 通过串口发送AT命令配置S2E模块 ****************************************************/ volatile uint8_t SendFlag = 0; void TCP_Server_Mode(void) { uint8_t RecvFlag = 1; char * state; switch (SendFlag) { case 0: { Usart_Send(USART2, "AT\r\n"); //终端检测命令 while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); //判断回复的数据中是否有“OK” if (state != NULL) { //有 RX2_Point = 0; //接收缓冲区指针置零 RecvFlag = 0; //接收标致位置零 SendFlag = 1; //发送标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); //接收缓存清零 } else { //无 SendFlag = 100; //配置失败 RecvFlag = 0; } } } } break; case 1: { Usart_Send(USART2, "AT+ECHO=0\r\n"); //开启(1)/关闭(0)回显命令 RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 2; printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 2: { Usart_Send(USART2, "AT+C1_OP=0\r\n"); //配置为TCP Server模式命令 RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 3; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 3: { Usart_Send(USART2, "AT+IP_MODE=0\r\n"); //配置为静态IP模式 RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 4; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 4: { Usart_Send(USART2, "AT+IP=192.168.1.88\r\n"); //配置本地IP RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 5; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 5: { Usart_Send(USART2, "AT+MARK=255.255.255.0\r\n"); //配置本地IP RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 6; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 6: { Usart_Send(USART2, "AT+GATEWAY=192.168.1.1\r\n"); //配置本地IP RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 7; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 7: { Usart_Send(USART2, "AT+C1_PORT=5000\r\n"); //配置本地端口号 RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 8; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 8: { Usart_Send(USART2, "AT+START_MODE=0\r\n"); //配置启动模式(0--AT模式,1-- 数据模式) RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 9; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 9: { Usart_Send(USART2, "AT+EXIT\r\n"); //保存配置并进入数据模式 RecvFlag = 1; while (RecvFlag) { if (RX2_Point & amp; FRAME_LEN) { //如果接收到数据 state = strstr((char * ) RecvBuff, "OK"); if (state != NULL) { RX2_Point = 0; RecvFlag = 0; SendFlag = 99; //状态标志位置零 printf("Recv:%s\r\n", RecvBuff); memset(RecvBuff, 0, RECV_LEN); } else { SendFlag = 100; RecvFlag = 0; } } } } break; case 99: { printf("TCP Server Config Success!\r\n"); Config_OK = 1; } default: RecvFlag = 100; break; case 100: { printf("TCP Server Config Fail!\r\n"); Config_OK = 1; } break; } }
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