Need Help: Ethernet not working on H723ZG without FreeRTOS.

Question

Hello Folks,[Re-posting this question since I believe I had it in the from Board. I would delete the original one if I could.]I use the H723ZG Nucleo board without FreeRTOS. I had configured Ethernet for the H723ZG in the past. But I am unable to configure it again now, even when following the same steps. When I first got it working, my configuration was based on this Youtube video STM32 ETHERNET #1. Hardware Configuration || PART 1. In addition, I spent countless days trying to configure the Ethernet without FreeRTOS based on this post How to create project for STM32H7 with Ethernet and LwIP stack working from @Adam BERLINGER . I was able to get it working WITH FreeRTOS, but not WITHOUT it. And I am here to kindly ask for your help. Here are some screenshots from my `.ioc` file.    I am testing it with the ping example.  /* USER CODE BEGIN 0 */
extern struct netif gnetif;
/* USER CODE END 0 */

[...]

/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/** PING Example */
ethernetif_input(&gnetif);
sys_check_timeouts();
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */  === EDIT STARTI noticed that in the MPU I was requestion 16 KBytes starting from 0x30000200 and I had the LWIP MEM_SIZE as 8 KBytes. I decided to change both, and I got a HardFault.  === EDIT ENDI would appreciate any feedback on this matter from anyone.Many thanks,Eduardo.

eduardo_reis · Accepted Answer

This issue was solved with the solution for this other related question.

Also, MX_LWIP_Process() inside the while(1) can simply be used instead of all these other changes, since MX_LWIP_Process does exactly that.

@eduardo_reis wrote:
I am testing it with the ping example.

/* USER CODE BEGIN 0 */
extern struct netif gnetif;
/* USER CODE END 0 */

[...]

/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/** PING Example */
ethernetif_input(&gnetif);
sys_check_timeouts();
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */

STea · Answer

Hello @eduardo_reis ,At first glance it seems like you are missing this call in the while(1); Ethernet_Link_Periodic_Handle(&gnetif);The MPU  configuration should be as follows following the example found in the cube firmware :static void MPU_Config(void){ MPU_Region_InitTypeDef MPU_InitStruct; /* Disable the MPU */ HAL_MPU_Disable(); /* Configure the MPU attributes as Device not cacheable for ETH DMA descriptors */ MPU_InitStruct.Enable = MPU_REGION_ENABLE; MPU_InitStruct.BaseAddress = 0x30000000; MPU_InitStruct.Size = MPU_REGION_SIZE_1KB; MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS; MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE; MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE; MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE; MPU_InitStruct.Number = MPU_REGION_NUMBER1; MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0; MPU_InitStruct.SubRegionDisable = 0x00; MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE; HAL_MPU_ConfigRegion(&MPU_InitStruct); /* Configure the MPU attributes as Normal Non Cacheable for LwIP RAM heap which contains the Tx buffers */ MPU_InitStruct.Enable = MPU_REGION_ENABLE; MPU_InitStruct.BaseAddress = 0x30004000; MPU_InitStruct.Size = MPU_REGION_SIZE_16KB; MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS; MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE; MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE; MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE; MPU_InitStruct.Number = MPU_REGION_NUMBER2; MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1; MPU_InitStruct.SubRegionDisable = 0x00; MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE; HAL_MPU_ConfigRegion(&MPU_InitStruct);HAL_MPU_ConfigRegion(&MPU_InitStruct);}The GPIO configuration should be as follows :void HAL_ETH_MspInit(ETH_HandleTypeDef *heth){GPIO_InitTypeDef GPIO_InitStructure = {0};/* Ethernett MSP init: RMII Mode *//* Ethernet pins configuration *//* RMII_REF_CLK ----------------------> PA1 RMII_MDIO -------------------------> PA2 RMII_MDC --------------------------> PC1 RMII_MII_CRS_DV -------------------> PA7 RMII_MII_RXD0 ---------------------> PC4 RMII_MII_RXD1 ---------------------> PC5 RMII_MII_RXER ---------------------> PB10 RMII_MII_TX_EN --------------------> PB11 RMII_MII_TXD0 ---------------------> PB12 RMII_MII_TXD1 ---------------------> PB13 *//* Enable GPIOs clocks */ __HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE();/* Configure PA1, PA2 , PA7 */GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7;GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;GPIO_InitStructure.Pull = GPIO_NOPULL ;GPIO_InitStructure.Alternate = GPIO_AF11_ETH;HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);/* Configure PB10, PB11, PB12 and PB13 */GPIO_InitStructure.Pin = GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13;HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);/* Configure PC1, PC4 and PC5 */GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5;HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);/* Enable Ethernet clocks */ __HAL_RCC_ETH1MAC_CLK_ENABLE(); __HAL_RCC_ETH1TX_CLK_ENABLE(); __HAL_RCC_ETH1RX_CLK_ENABLE();}you can base your configuration on the STM32Cube_FW_H7_V1.11.1\Projects\STM32H735G-DK\Applications\LwIP\LwIP_TCP_Echo_Server example .BR

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