/********************************** (C) COPYRIGHT ******************************* * File Name : main.c * Author : WCH * Version : V1.0.0 * Date : 2022/05/31 * Description : Main program body. ********************************************************************************* * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd. * Attention: This software (modified or not) and binary are used for * microcontroller manufactured by Nanjing Qinheng Microelectronics. *******************************************************************************/ /* *@Note TCP Server example, demonstrating that TCP Server receives data and sends back after connecting to a client. For details on the selection of engineering chips, please refer to the "CH32V20x Evaluation Board Manual" under the CH32V20xEVT\EVT\PUB folder. */ #include "string.h" #include "debug.h" #include "eth_driver.h" #define KEEPALIVE_ENABLE 1 //Enable keep alive function u8 MACAddr[6]; //MAC address u8 IPAddr[4] = { 192, 168, 1, 10 }; //IP address u8 GWIPAddr[4] = { 192, 168, 1, 1 }; //Gateway IP address u8 IPMask[4] = { 255, 255, 255, 0 }; //subnet mask u16 srcport = 1000; //source port u8 SocketIdForListen; //Socket for Listening u8 socket[WCHNET_MAX_SOCKET_NUM]; //Save the currently connected socket u8 SocketRecvBuf[WCHNET_MAX_SOCKET_NUM][RECE_BUF_LEN]; //socket receive buffer u8 MyBuf[RECE_BUF_LEN]; /********************************************************************* * @fn mStopIfError * * @brief check if error. * * @param iError - error constants. * * @return none */ void mStopIfError(u8 iError) { if (iError == WCHNET_ERR_SUCCESS) return; printf("Error: %02X\r\n", (u16) iError); } /********************************************************************* * @fn TIM2_Init * * @brief Initializes TIM2. * * @return none */ void TIM2_Init(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure = { 0 }; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); TIM_TimeBaseStructure.TIM_Period = SystemCoreClock / 1000000 - 1; TIM_TimeBaseStructure.TIM_Prescaler = WCHNETTIMERPERIOD * 1000 - 1; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE); TIM_Cmd(TIM2, ENABLE); TIM_ClearITPendingBit(TIM2, TIM_IT_Update); NVIC_EnableIRQ(TIM2_IRQn); } /********************************************************************* * @fn WCHNET_CreateTcpSocketListen * * @brief Create TCP Socket for Listening * * @return none */ void WCHNET_CreateTcpSocketListen(void) { u8 i; SOCK_INF TmpSocketInf; memset((void *) &TmpSocketInf, 0, sizeof(SOCK_INF)); TmpSocketInf.SourPort = srcport; TmpSocketInf.ProtoType = PROTO_TYPE_TCP; i = WCHNET_SocketCreat(&SocketIdForListen, &TmpSocketInf); printf("SocketIdForListen %d\r\n", SocketIdForListen); mStopIfError(i); i = WCHNET_SocketListen(SocketIdForListen); //listen for connections mStopIfError(i); } /********************************************************************* * @fn WCHNET_DataLoopback * * @brief Data loopback function. * * @param id - socket id. * * @return none */ void WCHNET_DataLoopback(u8 id) { #if 1 u8 i; u32 len; u32 endAddr = SocketInf[id].RecvStartPoint + SocketInf[id].RecvBufLen; //Receive buffer end address if ((SocketInf[id].RecvReadPoint + SocketInf[id].RecvRemLen) > endAddr) { //Calculate the length of the received data len = endAddr - SocketInf[id].RecvReadPoint; } else { len = SocketInf[id].RecvRemLen; } i = WCHNET_SocketSend(id, (u8 *) SocketInf[id].RecvReadPoint, &len); //send data if (i == WCHNET_ERR_SUCCESS) { WCHNET_SocketRecv(id, NULL, &len); //Clear sent data } #else u32 len, totallen; u8 *p = MyBuf; len = WCHNET_SocketRecvLen(id, NULL); //query length printf("Receive Len = %02x\n", len); totallen = len; WCHNET_SocketRecv(id, MyBuf, &len); //Read the data of the receive buffer into MyBuf while(1){ len = totallen; WCHNET_SocketSend(id, p, &len); //Send the data totallen -= len; //Subtract the sent length from the total length p += len; //offset buffer pointer if(totallen)continue; //If the data is not sent, continue to send break; //After sending, exit } #endif } /********************************************************************* * @fn WCHNET_HandleSockInt * * @brief Socket Interrupt Handle * * @param socketid - socket id. * intstat - interrupt status * * @return none */ void WCHNET_HandleSockInt(u8 socketid, u8 intstat) { u8 i; if (intstat & SINT_STAT_RECV) //receive data { WCHNET_DataLoopback(socketid); //Data loopback } if (intstat & SINT_STAT_CONNECT) //connect successfully { #if KEEPALIVE_ENABLE WCHNET_SocketSetKeepLive(socketid, ENABLE); #endif WCHNET_ModifyRecvBuf(socketid, (u32) SocketRecvBuf[socketid], RECE_BUF_LEN); for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) { if (socket[i] == 0xff) { //save connected socket id socket[i] = socketid; break; } } printf("TCP Connect Success\r\n"); printf("socket id: %d\r\n",socket[i]); } if (intstat & SINT_STAT_DISCONNECT) //disconnect { for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) { //delete disconnected socket id if (socket[i] == socketid) { socket[i] = 0xff; break; } } printf("TCP Disconnect\r\n"); } if (intstat & SINT_STAT_TIM_OUT) //timeout disconnect { for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) { //delete disconnected socket id if (socket[i] == socketid) { socket[i] = 0xff; break; } } printf("TCP Timeout\r\n"); } } /********************************************************************* * @fn WCHNET_HandleGlobalInt * * @brief Global Interrupt Handle * * @return none */ void WCHNET_HandleGlobalInt(void) { u8 intstat; u16 i; u8 socketint; intstat = WCHNET_GetGlobalInt(); //get global interrupt flag if (intstat & GINT_STAT_UNREACH) //Unreachable interrupt { printf("GINT_STAT_UNREACH\r\n"); } if (intstat & GINT_STAT_IP_CONFLI) //IP conflict { printf("GINT_STAT_IP_CONFLI\r\n"); } if (intstat & GINT_STAT_PHY_CHANGE) //PHY status change { i = WCHNET_GetPHYStatus(); if (i & PHY_Linked_Status) printf("PHY Link Success\r\n"); } if (intstat & GINT_STAT_SOCKET) { //socket related interrupt for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) { socketint = WCHNET_GetSocketInt(i); if (socketint) WCHNET_HandleSockInt(i, socketint); } } } /********************************************************************* * @fn main * * @brief Main program * * @return none */ int main(void) { u8 i; Delay_Init(); USART_Printf_Init(115200); //USART initialize printf("TcpServer Test\r\n"); printf("SystemClk:%d\r\n", SystemCoreClock); printf("net version:%x\n", WCHNET_GetVer()); if ( WCHNET_LIB_VER != WCHNET_GetVer()) { printf("version error.\n"); } WCHNET_GetMacAddr(MACAddr); //get the chip MAC address printf("mac addr:"); for ( i = 0; i < 6; i++) printf("%x ", MACAddr[i]); printf("\n"); TIM2_Init(); i = ETH_LibInit(IPAddr, GWIPAddr, IPMask, MACAddr); //Ethernet library initialize mStopIfError(i); if (i == WCHNET_ERR_SUCCESS) printf("WCHNET_LibInit Success\r\n"); #if KEEPALIVE_ENABLE //Configure keep alive parameters { struct _KEEP_CFG cfg; cfg.KLIdle = 20000; cfg.KLIntvl = 15000; cfg.KLCount = 9; WCHNET_ConfigKeepLive(&cfg); } #endif memset(socket, 0xff, WCHNET_MAX_SOCKET_NUM); WCHNET_CreateTcpSocketListen(); //Create TCP Socket for Listening while(1) { /*Ethernet library main task function, * which needs to be called cyclically*/ WCHNET_MainTask(); /*Query the Ethernet global interrupt, * if there is an interrupt, call the global interrupt handler*/ if(WCHNET_QueryGlobalInt()) { WCHNET_HandleGlobalInt(); } } }