Hi,
I am using an STM32H7RS MCU (NUCLEO-H7S3L8) and I need to use both USB HS Device and Ethernet MAC.
For Ethernet MAC I will only need to use MDIO interface, so I don't think I need a stack for it but please correct me if I am wrong.
The MX_ETH_Init code is generated with STM32CubeMX 6.14.0, the pin assignment is according to the schematics:
https://www.st.com/resource/en/schematic_pack/mb1737-h7s3l8-b02-schematic.pdf
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file eth.c
* @brief This file provides code for the configuration
* of the ETH instances.
******************************************************************************
* @attention
*
* Copyright (c) 2025 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "eth.h"
#include "string.h"
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma location=0x24020000
ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
#pragma location=0x24020080
ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
#elif defined ( __CC_ARM ) /* MDK ARM Compiler */
__attribute__((at(0x24020000))) ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
__attribute__((at(0x24020080))) ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
#elif (defined ( __GNUC__ ) || defined ( __ARMCC_VERSION )) /* GNU Compiler */
ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; __attribute__((section(".RxDescripSection"))); /* Ethernet Rx DMA Descriptors */
ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; __attribute__((section(".TxDescripSection"))); /* Ethernet Tx DMA Descriptors */
#endif
ETH_BufferTypeDef Txbuffer[ETH_TX_DESC_CNT * 2U];
ETH_TxPacketConfigTypeDef TxConfig;
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
ETH_HandleTypeDef heth;
/* ETH init function */
void MX_ETH_Init(void)
{
/* USER CODE BEGIN ETH_Init 0 */
/* USER CODE END ETH_Init 0 */
static uint8_t MACAddr[6];
/* USER CODE BEGIN ETH_Init 1 */
/* USER CODE END ETH_Init 1 */
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 = 1524;
/* USER CODE BEGIN MACADDRESS */
/* USER CODE END MACADDRESS */
if (HAL_ETH_Init(&heth) != HAL_OK)
{
Error_Handler();
}
memset(&TxConfig, 0 , sizeof(ETH_TxPacketConfigTypeDef));
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;
/* USER CODE BEGIN ETH_Init 2 */
/* USER CODE END ETH_Init 2 */
}
void HAL_ETH_MspInit(ETH_HandleTypeDef* ethHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
if(ethHandle->Instance==ETH)
{
/* USER CODE BEGIN ETH_MspInit 0 */
/* USER CODE END ETH_MspInit 0 */
/** Initializes the peripherals clock
*/
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ETH1REF;
PeriphClkInit.Eth1RefClockSelection = RCC_ETH1REFCLKSOURCE_ETH;
/* USER CODE BEGIN MACADDRESS */
/* USER CODE END MACADDRESS */
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
/* ETH clock enable */
__HAL_RCC_ETH1MAC_CLK_ENABLE();
__HAL_RCC_ETH1TX_CLK_ENABLE();
__HAL_RCC_ETH1RX_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
/**ETH GPIO Configuration
PB6 ------> ETH_RMII_REF_CLK
PG12 ------> ETH_RMII_TXD1
PG11 ------> ETH_RMII_TX_EN
PG13 ------> ETH_RMII_TXD0
PA2 ------> ETH_MDIO
PA7 ------> ETH_RMII_CRS_DV
PG6 ------> ETH_MDC
PC5 ------> ETH_RMII_RXD1
PG4 ------> ETH_RMII_RXD0
*/
GPIO_InitStruct.Pin = GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_11|GPIO_PIN_13|GPIO_PIN_6
|GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/* USER CODE BEGIN ETH_MspInit 1 */
/* USER CODE END ETH_MspInit 1 */
}
}
void HAL_ETH_MspDeInit(ETH_HandleTypeDef* ethHandle)
{
if(ethHandle->Instance==ETH)
{
/* USER CODE BEGIN ETH_MspDeInit 0 */
/* USER CODE END ETH_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_ETH1MAC_CLK_DISABLE();
__HAL_RCC_ETH1TX_CLK_DISABLE();
__HAL_RCC_ETH1RX_CLK_DISABLE();
/**ETH GPIO Configuration
PB6 ------> ETH_RMII_REF_CLK
PG12 ------> ETH_RMII_TXD1
PG11 ------> ETH_RMII_TX_EN
PG13 ------> ETH_RMII_TXD0
PA2 ------> ETH_MDIO
PA7 ------> ETH_RMII_CRS_DV
PG6 ------> ETH_MDC
PC5 ------> ETH_RMII_RXD1
PG4 ------> ETH_RMII_RXD0
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6);
HAL_GPIO_DeInit(GPIOG, GPIO_PIN_12|GPIO_PIN_11|GPIO_PIN_13|GPIO_PIN_6
|GPIO_PIN_4);
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_7);
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_5);
/* USER CODE BEGIN ETH_MspDeInit 1 */
/* USER CODE END ETH_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
USB HS Device works both with or without DMA, but if MX_ETH_Init is executed, the USB HS Device fails to bring up.
Is there some particular configuration detail I am not taking into account?
Thanks,
s.
