基于最新版本stm32cubeIDE的lwip进行TCP、UDP组播通讯 |
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基于最新版本stm32cubeIDE的lwip进行TCP、UDP组播通讯
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基于stm32cubeIDE的lwip进行TCP、UDP组播通讯
一、ETH配置
采用LAN8720A的PHY芯片，原理图为： [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-iea2Tmkw-1652691553020)(LAN8720A原理图.png)] 需注意reset脚 在初始化PHY芯片前，拉高拉低下reset脚 HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_RESET); HAL_Delay(55); HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_SET); HAL_Delay(55);该PHY芯片采用RMII接口 [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-w79kKbB3-1652691553022)(./PHY%E9%85%8D%E7%BD%AE.png)] [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-MBtxCjIU-1652691553023)(./PHY%E9%85%8D%E7%BD%AE1.png)] 二、配置LWIP 1、platform设置因PHY芯片采用的是LAN8720A则，platform参数选择同系列的LAN8742 [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-5d2s2N04-1652691553023)(./lwip_platform%E8%AE%BE%E7%BD%AE.png)] 2、网络配置固定IP的话就配置DHCP disable 并配置IP地址、子网掩码，网关地址 开启UDP组播 首先勾选Key option里的show advantage parameters选项 只有这两项开启，才能开启IGMP模式 在初始化UDP前将组播地址加入组播组，调用 igmp_joingroup(IP_ADDR_ANY,&ipgroup_rev) 还有一个坑就是，stm32HAL MAC库默认是将组播地址给过滤掉的，所以要配置下MAC，关闭组播的MAC过滤，在low_level_init函数里添加以下代码： netif->flags |=NETIF_FLAG_IGMP; HAL_ETH_GetMACFilterConfig(&heth,&Mac_Fliter); Mac_Fliter.PassAllMulticast=ENABLE; HAL_ETH_SetMACFilterConfig(&heth,&Mac_Fliter);具体的low_leve_init函数见下： static void low_level_init(struct netif *netif) { HAL_StatusTypeDef hal_eth_init_status = HAL_OK; /* USER CODE BEGIN OS_THREAD_ATTR_CMSIS_RTOS_V2 */ osThreadAttr_t attributes; ETH_MACFilterConfigTypeDef Mac_Fliter; /* USER CODE END OS_THREAD_ATTR_CMSIS_RTOS_V2 */ uint32_t duplex, speed = 0; int32_t PHYLinkState = 0; ETH_MACConfigTypeDef MACConf = {0}; /* Start ETH HAL Init */ uint8_t MACAddr[6] ; heth.Instance = ETH; MACAddr[0] = 0x00; MACAddr[1] = 0x80; MACAddr[2] = 0xE1; MACAddr[3] = 0x00; MACAddr[4] = 0x00; MACAddr[5] = 0x00; heth.Init.MACAddr = &MACAddr[0]; heth.Init.MediaInterface = HAL_ETH_RMII_MODE; heth.Init.TxDesc = DMATxDscrTab; heth.Init.RxDesc = DMARxDscrTab; heth.Init.RxBuffLen = 1536; /* USER CODE BEGIN MACADDRESS */ HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_RESET); HAL_Delay(55); HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_SET); HAL_Delay(55); /* USER CODE END MACADDRESS */ hal_eth_init_status = HAL_ETH_Init(&heth); memset(&TxConfig, 0 , sizeof(ETH_TxPacketConfig)); TxConfig.Attributes = ETH_TX_PACKETS_FEATURES_CSUM | ETH_TX_PACKETS_FEATURES_CRCPAD; TxConfig.ChecksumCtrl = ETH_CHECKSUM_IPHDR_PAYLOAD_INSERT_PHDR_CALC; TxConfig.CRCPadCtrl = ETH_CRC_PAD_INSERT; /* End ETH HAL Init */ /* Initialize the RX POOL */ LWIP_MEMPOOL_INIT(RX_POOL); #if LWIP_ARP || LWIP_ETHERNET /* set MAC hardware address length */ netif->hwaddr_len = ETH_HWADDR_LEN; /* set MAC hardware address */ netif->hwaddr[0] = heth.Init.MACAddr[0]; netif->hwaddr[1] = heth.Init.MACAddr[1]; netif->hwaddr[2] = heth.Init.MACAddr[2]; netif->hwaddr[3] = heth.Init.MACAddr[3]; netif->hwaddr[4] = heth.Init.MACAddr[4]; netif->hwaddr[5] = heth.Init.MACAddr[5]; /* maximum transfer unit */ netif->mtu = ETH_MAX_PAYLOAD; /* Accept broadcast address and ARP traffic */ /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */ #if LWIP_ARP netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP; #else netif->flags |= NETIF_FLAG_BROADCAST; #endif /* LWIP_ARP */ /* create a binary semaphore used for informing ethernetif of frame reception */ RxPktSemaphore = osSemaphoreNew(1, 1, NULL); /* create a binary semaphore used for informing ethernetif of frame transmission */ TxPktSemaphore = osSemaphoreNew(1, 1, NULL); /* create the task that handles the ETH_MAC */ /* USER CODE BEGIN OS_THREAD_NEW_CMSIS_RTOS_V2 */ netif->flags |=NETIF_FLAG_IGMP; memset(&attributes, 0x0, sizeof(osThreadAttr_t)); attributes.name = "EthIf"; attributes.stack_size = INTERFACE_THREAD_STACK_SIZE; attributes.priority = osPriorityRealtime; osThreadNew(ethernetif_input, netif, &attributes); /* USER CODE END OS_THREAD_NEW_CMSIS_RTOS_V2 */ /* USER CODE BEGIN PHY_PRE_CONFIG */ HAL_ETH_GetMACFilterConfig(&heth,&Mac_Fliter); Mac_Fliter.PassAllMulticast=ENABLE; HAL_ETH_SetMACFilterConfig(&heth,&Mac_Fliter); /* USER CODE END PHY_PRE_CONFIG */ /* Set PHY IO functions */ LAN8742_RegisterBusIO(&LAN8742, &LAN8742_IOCtx); /* Initialize the LAN8742 ETH PHY */ LAN8742_Init(&LAN8742); if (hal_eth_init_status == HAL_OK) { PHYLinkState = LAN8742_GetLinkState(&LAN8742); /* Get link state */ if(PHYLinkState switch (PHYLinkState) { case LAN8742_STATUS_100MBITS_FULLDUPLEX: duplex = ETH_FULLDUPLEX_MODE; speed = ETH_SPEED_100M; break; case LAN8742_STATUS_100MBITS_HALFDUPLEX: duplex = ETH_HALFDUPLEX_MODE; speed = ETH_SPEED_100M; break; case LAN8742_STATUS_10MBITS_FULLDUPLEX: duplex = ETH_FULLDUPLEX_MODE; speed = ETH_SPEED_10M; break; case LAN8742_STATUS_10MBITS_HALFDUPLEX: duplex = ETH_HALFDUPLEX_MODE; speed = ETH_SPEED_10M; break; default: duplex = ETH_FULLDUPLEX_MODE; speed = ETH_SPEED_100M; break; } /* Get MAC Config MAC */ HAL_ETH_GetMACConfig(&heth, &MACConf); MACConf.DuplexMode = duplex; MACConf.Speed = speed; HAL_ETH_SetMACConfig(&heth, &MACConf); HAL_ETH_Start_IT(&heth); netif_set_up(netif); netif_set_link_up(netif); /* USER CODE BEGIN PHY_POST_CONFIG */ /* USER CODE END PHY_POST_CONFIG */ } } else { Error_Handler(); } #endif /* LWIP_ARP || LWIP_ETHERNET */ /* USER CODE BEGIN LOW_LEVEL_INIT */ /* USER CODE END LOW_LEVEL_INIT */ }这样就解除了MAC的过滤 再完善下UDP的接收RAW API接收函数就可以了 |
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