static void low_level_init(struct netif *netif)
{
uint32_t regvalue = 0;
HAL_StatusTypeDef hal_eth_init_status;
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_RESET);
osDelay(50);
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_SET);
uint32_t sn0;
sn0=(vu32)(0x1FFF7A10);
/* Init ETH */
uint8_t MACAddr[6] ;
heth.Instance = ETH;
heth.Init.AutoNegotiation = ETH_AUTONEGOTIATION_ENABLE;
heth.Init.Speed = ETH_SPEED_100M;
heth.Init.DuplexMode = ETH_MODE_FULLDUPLEX;
heth.Init.PhyAddress = LAN8742A_PHY_ADDRESS;
MACAddr[0] = 0x02;
MACAddr[1] = 0x00;
MACAddr[2] = 0x00;
MACAddr[3] = (sn0>>16)&0XFF;
MACAddr[4] = (sn0>>8)&0XFFF;
MACAddr[5] = sn0&0XFF;
heth.Init.MACAddr = &MACAddr[0];
heth.Init.RxMode = ETH_RXINTERRUPT_MODE;
heth.Init.ChecksumMode = ETH_CHECKSUM_BY_HARDWARE;
heth.Init.MediaInterface = ETH_MEDIA_INTERFACE_RMII;
/* USER CODE BEGIN MACADDRESS */
/* USER CODE END MACADDRESS */
hal_eth_init_status = HAL_ETH_Init(&heth);
if (hal_eth_init_status == HAL_OK)
{
/* Set netif link flag /
netif->flags |= NETIF_FLAG_LINK_UP;
}
/ Initialize Tx Descriptors list: Chain Mode */
HAL_ETH_DMATxDescListInit(&heth, DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB);
/* Initialize Rx Descriptors list: Chain Mode */
HAL_ETH_DMARxDescListInit(&heth, DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB);
#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 = 1500;
/* 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 */
osSemaphoreDef(SEM);
s_xSemaphore = osSemaphoreCreate(osSemaphore(SEM), 1);
/* create the task that handles the ETH_MAC /
/ USER CODE BEGIN OS_THREAD_DEF_CREATE_CMSIS_RTOS_V1 /
osThreadDef(EthIf, ethernetif_input, osPriorityRealtime, 0, INTERFACE_THREAD_STACK_SIZE);
osThreadCreate (osThread(EthIf), netif);
/ USER CODE END OS_THREAD_DEF_CREATE_CMSIS_RTOS_V1 /
/ Enable MAC and DMA transmission and reception */
HAL_ETH_Start(&heth);
/* USER CODE BEGIN PHY_PRE_CONFIG */
/* USER CODE END PHY_PRE_CONFIG */
/* Read Register Configuration */
HAL_ETH_ReadPHYRegister(&heth, PHY_ISFR, ®value);
regvalue |= (PHY_ISFR_INT4);
/* Enable Interrupt on change of link status */
HAL_ETH_WritePHYRegister(&heth, PHY_ISFR , regvalue );
/* Read Register Configuration */
HAL_ETH_ReadPHYRegister(&heth, PHY_ISFR , ®value);
/* USER CODE BEGIN PHY_POST_CONFIG */
/* USER CODE END PHY_POST_CONFIG */
#endif /* LWIP_ARP || LWIP_ETHERNET */
/* USER CODE BEGIN LOW_LEVEL_INIT */
/* USER CODE END LOW_LEVEL_INIT */
}
mac 地址 的填写：
MACAddr[0] = 0x02;
MACAddr[1] = 0x00;
MACAddr[2] = 0x00;
MACAddr[3] = (sn0>>16)&0XFF;
MACAddr[4] = (sn0>>8)&0XFFF;
MACAddr[5] = sn0&0XFF;
引脚 注意
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_RESET);
osDelay(50);
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_SET);
