UART communication between stn32h7s78 and Wi-Fi module EMA3080

harshpanchal_6 · ‎2024-11-25

Hello Folks,

I am trying to establish the UART communication between STM32H7S78 and WIFI module EMA3080.

I am facing issue while transmitting, receiving and response of AT-commands from UART-7 to UART-4.

Please find the attached main.txt file and please share your suggestions.

Thank you,

Harsh

Peter BENSCH · ‎2024-11-25

There is no main.txt yet?

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

harshpanchal_6 · ‎2024-11-25

Peter BENSCH · ‎2024-11-25

It is easier to insert the source code using the </> button:

Logo
/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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 "main.h"
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
char resp_buff[100];
char tx_buff[20];
char rx_buff[38];


/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

UART_HandleTypeDef huart4;
UART_HandleTypeDef huart7;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
static void MX_GPIO_Init(void);
static void MX_UART4_Init(void);
static void MX_UART7_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void sendATCommand(const char *command)
{
    strcpy((char *)tx_buff, command);


    HAL_UART_Transmit(&huart7, (uint8_t *)tx_buff, 9, 5000); // TX data from UART-7 [wifi module]

    HAL_UART_Receive(&huart4, (uint8_t *)rx_buff, 9, 5000);  // RX data on UART-4 [stm32h7 board]
        // Error_Handler();


    // Transmit received response to another UART
    //Verify mxchip response what we received st firmware
    HAL_UART_Transmit(&huart4, (uint8_t *)rx_buff, 9,  5000); // Response on UART-4 [stm32h7 board]
        // Error_Handler();

}
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Update SystemCoreClock variable according to RCC registers values. */
  SystemCoreClockUpdate();

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_UART4_Init();
  MX_UART7_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
	  sendATCommand("AT+FWVER?");
  }
  /* USER CODE END 3 */
}

/**
  * @brief UART4 Initialization Function
  * @PAram None
  * @retval None
  */
static void MX_UART4_Init(void)
{

  /* USER CODE BEGIN UART4_Init 0 */

  /* USER CODE END UART4_Init 0 */

  /* USER CODE BEGIN UART4_Init 1 */

  /* USER CODE END UART4_Init 1 */
  huart4.Instance = UART4;
  huart4.Init.BaudRate = 115200;
  huart4.Init.WordLength = UART_WORDLENGTH_8B;
  huart4.Init.StopBits = UART_STOPBITS_1;
  huart4.Init.Parity = UART_PARITY_NONE;
  huart4.Init.Mode = UART_MODE_TX_RX;
  huart4.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart4.Init.OverSampling = UART_OVERSAMPLING_16;
  huart4.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart4.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart4.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart4) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart4, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart4, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart4) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN UART4_Init 2 */

  /* USER CODE END UART4_Init 2 */

}

/**
  * @brief UART7 Initialization Function
  * @PAram None
  * @retval None
  */
static void MX_UART7_Init(void)
{

  /* USER CODE BEGIN UART7_Init 0 */

  /* USER CODE END UART7_Init 0 */

  /* USER CODE BEGIN UART7_Init 1 */

  /* USER CODE END UART7_Init 1 */
  huart7.Instance = UART7;
  huart7.Init.BaudRate = 115200;
  huart7.Init.WordLength = UART_WORDLENGTH_8B;
  huart7.Init.StopBits = UART_STOPBITS_1;
  huart7.Init.Parity = UART_PARITY_NONE;
  huart7.Init.Mode = UART_MODE_TX_RX;
  huart7.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart7.Init.OverSampling = UART_OVERSAMPLING_16;
  huart7.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart7.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart7.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart7) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart7, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart7, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart7) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN UART7_Init 2 */

  /* USER CODE END UART7_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @PAram None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOG_CLK_ENABLE();
  __HAL_RCC_GPIOM_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pins : DCMI_D2_Pin DCMI_D3_Pin DCMI_D4_Pin */
  GPIO_InitStruct.Pin = DCMI_D2_Pin|DCMI_D3_Pin|DCMI_D4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /*Configure GPIO pin : DCMI_HSYNC_Pin */
  GPIO_InitStruct.Pin = DCMI_HSYNC_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF5_DCMIPP;
  HAL_GPIO_Init(DCMI_HSYNC_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : USB2_FS_N_Pin USB2_FS_P_Pin */
  GPIO_InitStruct.Pin = USB2_FS_N_Pin|USB2_FS_P_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
  HAL_GPIO_Init(GPIOM, &GPIO_InitStruct);

  /*Configure GPIO pins : USB1_HS_P_Pin USB1_HS_N_Pin */
  GPIO_InitStruct.Pin = USB1_HS_P_Pin|USB1_HS_N_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF10_OTG_HS;
  HAL_GPIO_Init(GPIOM, &GPIO_InitStruct);

  /*Configure GPIO pin : DCMI_D5_Pin */
  GPIO_InitStruct.Pin = DCMI_D5_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(DCMI_D5_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : SD_CMD_Pin */
  GPIO_InitStruct.Pin = SD_CMD_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF11_SDMMC1;
  HAL_GPIO_Init(SD_CMD_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : DCMI_D6_Pin DCMI_VSYNC_Pin */
  GPIO_InitStruct.Pin = DCMI_D6_Pin|DCMI_VSYNC_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : MIC_CK_Pin */
  GPIO_InitStruct.Pin = MIC_CK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF1_ADF1;
  HAL_GPIO_Init(MIC_CK_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : I2S_SDO_Pin */
  GPIO_InitStruct.Pin = I2S_SDO_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF8_SPI6;
  HAL_GPIO_Init(I2S_SDO_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : LCD_RGB_R2_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF11_LTDC;
  HAL_GPIO_Init(LCD_RGB_R2_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : RMII_REF_CLK_Pin */
  GPIO_InitStruct.Pin = RMII_REF_CLK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF4_ETH;
  HAL_GPIO_Init(RMII_REF_CLK_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_R7_Pin LCD_HSYNC_Pin LCD_RGB_R6_Pin LCD_RGB_B1_Pin
                           LCD_CLK_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R7_Pin|LCD_HSYNC_Pin|LCD_RGB_R6_Pin|LCD_RGB_B1_Pin
                          |LCD_CLK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

  /*Configure GPIO pins : SPI_MISO_Pin SPI_MOSI_Pin SPI_CLK_Pin */
  GPIO_InitStruct.Pin = SPI_MISO_Pin|SPI_MOSI_Pin|SPI_CLK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF5_SPI4;
  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /*Configure GPIO pin : SD_D2_Pin */
  GPIO_InitStruct.Pin = SD_D2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_SDMMC1;
  HAL_GPIO_Init(SD_D2_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : SD_D3_Pin SD_CK_Pin SD_D0_Pin SD_D1_Pin */
  GPIO_InitStruct.Pin = SD_D3_Pin|SD_CK_Pin|SD_D0_Pin|SD_D1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF11_SDMMC1;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pins : I2C1_I3C_SDA_Pin I2C1_I3C_SCL_Pin */
  GPIO_InitStruct.Pin = I2C1_I3C_SDA_Pin|I2C1_I3C_SCL_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_R4_Pin LCD_RGB_R3_Pin LCD_RGB_G5_Pin LCD_DE_Pin
                           LCD_RGB_G6_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R4_Pin|LCD_RGB_R3_Pin|LCD_RGB_G5_Pin|LCD_DE_Pin
                          |LCD_RGB_G6_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : UCPD1_CC2_Pin UCPD1_CC1_Pin */
  GPIO_InitStruct.Pin = UCPD1_CC2_Pin|UCPD1_CC1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOM, &GPIO_InitStruct);

  /*Configure GPIO pin : LCD_VSYNC_Pin */
  GPIO_InitStruct.Pin = LCD_VSYNC_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF11_LTDC;
  HAL_GPIO_Init(LCD_VSYNC_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_B2_Pin LCD_RGB_B3_Pin LCD_RGB_B6_Pin LCD_RGB_R5_Pin
                           LCD_RGB_G3_Pin LCD_RGB_G2_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_B2_Pin|LCD_RGB_B3_Pin|LCD_RGB_B6_Pin|LCD_RGB_R5_Pin
                          |LCD_RGB_G3_Pin|LCD_RGB_G2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : DCMI_PIXCLK_Pin DCMI_D7_Pin */
  GPIO_InitStruct.Pin = DCMI_PIXCLK_Pin|DCMI_D7_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF5_DCMIPP;
  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_B5_Pin LCD_RGB_B4_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_B5_Pin|LCD_RGB_B4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF14_LTDC;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : DCMI_D0_Pin DCMI_D1_Pin */
  GPIO_InitStruct.Pin = DCMI_D0_Pin|DCMI_D1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pin : I2S_SDI_Pin */
  GPIO_InitStruct.Pin = I2S_SDI_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF5_SPI6;
  HAL_GPIO_Init(I2S_SDI_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : RMII_TX_EN_Pin */
  GPIO_InitStruct.Pin = RMII_TX_EN_Pin;
  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(RMII_TX_EN_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_G0_Pin LCD_RGB_R0_Pin LCD_RGB_G1_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_G0_Pin|LCD_RGB_R0_Pin|LCD_RGB_G1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_R1_Pin LCD_RGB_B0_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R1_Pin|LCD_RGB_B0_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF14_LTDC;
  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

  /*Configure GPIO pins : RMII_MDC_Pin RMII_RXD0_Pin RMII_RXD1_Pin */
  GPIO_InitStruct.Pin = RMII_MDC_Pin|RMII_RXD0_Pin|RMII_RXD1_Pin;
  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);

  /*Configure GPIO pins : RMII_MDIO_Pin RMII_CRS_DV_Pin */
  GPIO_InitStruct.Pin = RMII_MDIO_Pin|RMII_CRS_DV_Pin;
  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);

  /*Configure GPIO pins : I2S_WS_Pin I2S_CK_Pin */
  GPIO_InitStruct.Pin = I2S_WS_Pin|I2S_CK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF8_SPI6;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_G7_Pin LCD_RGB_G4_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_G7_Pin|LCD_RGB_G4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF10_LTDC;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : I2S_MCK_Pin */
  GPIO_InitStruct.Pin = I2S_MCK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF5_SPI6;
  HAL_GPIO_Init(I2S_MCK_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : LCD_RGB_B7_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_B7_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF12_LTDC;
  HAL_GPIO_Init(LCD_RGB_B7_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : RMII_TXD0_Pin RMII_RX_ER_Pin RMII_TXD1_Pin */
  GPIO_InitStruct.Pin = RMII_TXD0_Pin|RMII_RX_ER_Pin|RMII_TXD1_Pin;
  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);

  /*Configure GPIO pins : UCPD1_VSENSE_Pin UCPD1_ISENSE_Pin */
  GPIO_InitStruct.Pin = UCPD1_VSENSE_Pin|UCPD1_ISENSE_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @PAram  file: pointer to the source file name
  * @PAram  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

harshpanchal_6 · ‎2024-11-25

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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 "main.h"
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
char resp_buff[100];
char tx_buff[20];
char rx_buff[38];


/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

UART_HandleTypeDef huart4;
UART_HandleTypeDef huart7;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
static void MX_GPIO_Init(void);
static void MX_UART4_Init(void);
static void MX_UART7_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void sendATCommand(const char *command)
{
    strcpy((char *)tx_buff, command);


    HAL_UART_Transmit(&huart7, (uint8_t *)tx_buff, 9, 5000); // TX data from UART-7 [wifi module]

    HAL_UART_Receive(&huart4, (uint8_t *)rx_buff, 9, 5000);  // RX data on UART-4 [stm32h7 board]
        // Error_Handler();


    // Transmit received response to another UART
    //Verify mxchip response what we received st firmware
    HAL_UART_Transmit(&huart4, (uint8_t *)rx_buff, 9,  5000); // Response on UART-4 [stm32h7 board]
        // Error_Handler();

}
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Update SystemCoreClock variable according to RCC registers values. */
  SystemCoreClockUpdate();

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_UART4_Init();
  MX_UART7_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
	  sendATCommand("AT+FWVER?");
  }
  /* USER CODE END 3 */
}

/**
  * @brief UART4 Initialization Function
  * @PAram None
  * @retval None
  */
static void MX_UART4_Init(void)
{

  /* USER CODE BEGIN UART4_Init 0 */

  /* USER CODE END UART4_Init 0 */

  /* USER CODE BEGIN UART4_Init 1 */

  /* USER CODE END UART4_Init 1 */
  huart4.Instance = UART4;
  huart4.Init.BaudRate = 115200;
  huart4.Init.WordLength = UART_WORDLENGTH_8B;
  huart4.Init.StopBits = UART_STOPBITS_1;
  huart4.Init.Parity = UART_PARITY_NONE;
  huart4.Init.Mode = UART_MODE_TX_RX;
  huart4.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart4.Init.OverSampling = UART_OVERSAMPLING_16;
  huart4.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart4.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart4.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart4) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart4, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart4, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart4) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN UART4_Init 2 */

  /* USER CODE END UART4_Init 2 */

}

/**
  * @brief UART7 Initialization Function
  * @PAram None
  * @retval None
  */
static void MX_UART7_Init(void)
{

  /* USER CODE BEGIN UART7_Init 0 */

  /* USER CODE END UART7_Init 0 */

  /* USER CODE BEGIN UART7_Init 1 */

  /* USER CODE END UART7_Init 1 */
  huart7.Instance = UART7;
  huart7.Init.BaudRate = 115200;
  huart7.Init.WordLength = UART_WORDLENGTH_8B;
  huart7.Init.StopBits = UART_STOPBITS_1;
  huart7.Init.Parity = UART_PARITY_NONE;
  huart7.Init.Mode = UART_MODE_TX_RX;
  huart7.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart7.Init.OverSampling = UART_OVERSAMPLING_16;
  huart7.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart7.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart7.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart7) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart7, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart7, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart7) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN UART7_Init 2 */

  /* USER CODE END UART7_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @PAram None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOG_CLK_ENABLE();
  __HAL_RCC_GPIOM_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pins : DCMI_D2_Pin DCMI_D3_Pin DCMI_D4_Pin */
  GPIO_InitStruct.Pin = DCMI_D2_Pin|DCMI_D3_Pin|DCMI_D4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /*Configure GPIO pin : DCMI_HSYNC_Pin */
  GPIO_InitStruct.Pin = DCMI_HSYNC_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF5_DCMIPP;
  HAL_GPIO_Init(DCMI_HSYNC_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : USB2_FS_N_Pin USB2_FS_P_Pin */
  GPIO_InitStruct.Pin = USB2_FS_N_Pin|USB2_FS_P_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
  HAL_GPIO_Init(GPIOM, &GPIO_InitStruct);

  /*Configure GPIO pins : USB1_HS_P_Pin USB1_HS_N_Pin */
  GPIO_InitStruct.Pin = USB1_HS_P_Pin|USB1_HS_N_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF10_OTG_HS;
  HAL_GPIO_Init(GPIOM, &GPIO_InitStruct);

  /*Configure GPIO pin : DCMI_D5_Pin */
  GPIO_InitStruct.Pin = DCMI_D5_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(DCMI_D5_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : SD_CMD_Pin */
  GPIO_InitStruct.Pin = SD_CMD_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF11_SDMMC1;
  HAL_GPIO_Init(SD_CMD_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : DCMI_D6_Pin DCMI_VSYNC_Pin */
  GPIO_InitStruct.Pin = DCMI_D6_Pin|DCMI_VSYNC_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : MIC_CK_Pin */
  GPIO_InitStruct.Pin = MIC_CK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF1_ADF1;
  HAL_GPIO_Init(MIC_CK_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : I2S_SDO_Pin */
  GPIO_InitStruct.Pin = I2S_SDO_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF8_SPI6;
  HAL_GPIO_Init(I2S_SDO_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : LCD_RGB_R2_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF11_LTDC;
  HAL_GPIO_Init(LCD_RGB_R2_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : RMII_REF_CLK_Pin */
  GPIO_InitStruct.Pin = RMII_REF_CLK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF4_ETH;
  HAL_GPIO_Init(RMII_REF_CLK_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_R7_Pin LCD_HSYNC_Pin LCD_RGB_R6_Pin LCD_RGB_B1_Pin
                           LCD_CLK_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R7_Pin|LCD_HSYNC_Pin|LCD_RGB_R6_Pin|LCD_RGB_B1_Pin
                          |LCD_CLK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

  /*Configure GPIO pins : SPI_MISO_Pin SPI_MOSI_Pin SPI_CLK_Pin */
  GPIO_InitStruct.Pin = SPI_MISO_Pin|SPI_MOSI_Pin|SPI_CLK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF5_SPI4;
  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /*Configure GPIO pin : SD_D2_Pin */
  GPIO_InitStruct.Pin = SD_D2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_SDMMC1;
  HAL_GPIO_Init(SD_D2_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : SD_D3_Pin SD_CK_Pin SD_D0_Pin SD_D1_Pin */
  GPIO_InitStruct.Pin = SD_D3_Pin|SD_CK_Pin|SD_D0_Pin|SD_D1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF11_SDMMC1;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pins : I2C1_I3C_SDA_Pin I2C1_I3C_SCL_Pin */
  GPIO_InitStruct.Pin = I2C1_I3C_SDA_Pin|I2C1_I3C_SCL_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_R4_Pin LCD_RGB_R3_Pin LCD_RGB_G5_Pin LCD_DE_Pin
                           LCD_RGB_G6_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R4_Pin|LCD_RGB_R3_Pin|LCD_RGB_G5_Pin|LCD_DE_Pin
                          |LCD_RGB_G6_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : UCPD1_CC2_Pin UCPD1_CC1_Pin */
  GPIO_InitStruct.Pin = UCPD1_CC2_Pin|UCPD1_CC1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOM, &GPIO_InitStruct);

  /*Configure GPIO pin : LCD_VSYNC_Pin */
  GPIO_InitStruct.Pin = LCD_VSYNC_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF11_LTDC;
  HAL_GPIO_Init(LCD_VSYNC_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_B2_Pin LCD_RGB_B3_Pin LCD_RGB_B6_Pin LCD_RGB_R5_Pin
                           LCD_RGB_G3_Pin LCD_RGB_G2_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_B2_Pin|LCD_RGB_B3_Pin|LCD_RGB_B6_Pin|LCD_RGB_R5_Pin
                          |LCD_RGB_G3_Pin|LCD_RGB_G2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : DCMI_PIXCLK_Pin DCMI_D7_Pin */
  GPIO_InitStruct.Pin = DCMI_PIXCLK_Pin|DCMI_D7_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF5_DCMIPP;
  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_B5_Pin LCD_RGB_B4_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_B5_Pin|LCD_RGB_B4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF14_LTDC;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : DCMI_D0_Pin DCMI_D1_Pin */
  GPIO_InitStruct.Pin = DCMI_D0_Pin|DCMI_D1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF13_DCMIPP;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pin : I2S_SDI_Pin */
  GPIO_InitStruct.Pin = I2S_SDI_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF5_SPI6;
  HAL_GPIO_Init(I2S_SDI_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : RMII_TX_EN_Pin */
  GPIO_InitStruct.Pin = RMII_TX_EN_Pin;
  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(RMII_TX_EN_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_G0_Pin LCD_RGB_R0_Pin LCD_RGB_G1_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_G0_Pin|LCD_RGB_R0_Pin|LCD_RGB_G1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF13_LTDC;
  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_R1_Pin LCD_RGB_B0_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_R1_Pin|LCD_RGB_B0_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF14_LTDC;
  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

  /*Configure GPIO pins : RMII_MDC_Pin RMII_RXD0_Pin RMII_RXD1_Pin */
  GPIO_InitStruct.Pin = RMII_MDC_Pin|RMII_RXD0_Pin|RMII_RXD1_Pin;
  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);

  /*Configure GPIO pins : RMII_MDIO_Pin RMII_CRS_DV_Pin */
  GPIO_InitStruct.Pin = RMII_MDIO_Pin|RMII_CRS_DV_Pin;
  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);

  /*Configure GPIO pins : I2S_WS_Pin I2S_CK_Pin */
  GPIO_InitStruct.Pin = I2S_WS_Pin|I2S_CK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF8_SPI6;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : LCD_RGB_G7_Pin LCD_RGB_G4_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_G7_Pin|LCD_RGB_G4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF10_LTDC;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : I2S_MCK_Pin */
  GPIO_InitStruct.Pin = I2S_MCK_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF5_SPI6;
  HAL_GPIO_Init(I2S_MCK_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : LCD_RGB_B7_Pin */
  GPIO_InitStruct.Pin = LCD_RGB_B7_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF12_LTDC;
  HAL_GPIO_Init(LCD_RGB_B7_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : RMII_TXD0_Pin RMII_RX_ER_Pin RMII_TXD1_Pin */
  GPIO_InitStruct.Pin = RMII_TXD0_Pin|RMII_RX_ER_Pin|RMII_TXD1_Pin;
  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);

  /*Configure GPIO pins : UCPD1_VSENSE_Pin UCPD1_ISENSE_Pin */
  GPIO_InitStruct.Pin = UCPD1_VSENSE_Pin|UCPD1_ISENSE_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @PAram  file: pointer to the source file name
  * @PAram  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

Andrew Neil · ‎2024-11-25

So what investigation/testing/debugging have you done to find out what's going on?

Is your STM32H7S78 actually transmitting anything at all? If so, is it transmitting correctly?
Does your STM32H7S78 receive correctly?
Have you tested the parts separately - eg, with a terminal - before wiring them together?

Some tips here on debugging serial comms:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/tac-p/706966/highlight/true#M49