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On STM32h753 UART interrupt is working fine after programming the controller using keil but malfunctions after complete power reset ?

I am working on STM32H753 microcontroller. I want to receive string using UART interrupt and send the same string back on UART. The IDE is keil uvision 5. The problem I am facing is that when I first program the MCU UART is working fine and I am receiving back the string but after completely switching off the supply and restarting it UART is not working properly and I am not receiving the data I sent. I generated my code using stm32cube

int main(void)
{
	device_init();
	HAL_Delay(100);
  HAL_UART_Receive_IT(&huart1,recbuf,80);
  /* USER CODE BEGIN WHILE */

	
  while (1)
  {	
		if(rec_data == 1)
		{
			rec_data = 0;
																	//Clean and Invalidate data cache
														//SCB_CleanInvalidateDCache();
			HAL_UART_Transmit_IT(&huart1,recbuf,80);
		}
	}
  /* USER CODE END 3 */
}

int main(void)
{
	device_init();
	HAL_Delay(100);
  HAL_UART_Receive_IT(&huart1,recbuf,80);
  /* USER CODE BEGIN WHILE */

	
  while (1)
  {	
		if(rec_data == 1)
		{
			rec_data = 0;
																	//Clean and Invalidate data cache
														//SCB_CleanInvalidateDCache();
			HAL_UART_Transmit_IT(&huart1,recbuf,80);
		}
	}
  /* USER CODE END 3 */
}

#include "usart.h"
#include "gpio.h"
#include "config.h"
#include <string.h>
#include "timer.h"
uint8_t recbuf[100],trnsbuf[100];
unsigned char rec_data;
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

UART_HandleTypeDef huart1;

/* USART1 init function */

void MX_USART1_UART_Init(void)
{

  huart1.Instance = USART1;
  huart1.Init.BaudRate = 19200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart1.Init.Prescaler = UART_PRESCALER_DIV4;//UART_PRESCALER_DIV256;//UART_PRESCALER_DIV1;
  huart1.Init.FIFOMode = UART_FIFOMODE_DISABLE;
  huart1.Init.TXFIFOThreshold = UART_TXFIFO_THRESHOLD_1_8;
  huart1.Init.RXFIFOThreshold = UART_RXFIFO_THRESHOLD_1_8;
	//  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
	
	huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT|UART_ADVFEATURE_DMADISABLEONERROR_INIT;
	huart1.AdvancedInit.OverrunDisable = UART_ADVFEATURE_OVERRUN_DISABLE;
	huart1.AdvancedInit.DMADisableonRxError = UART_ADVFEATURE_DMA_DISABLEONRXERROR;

	
	rec_data = 0;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
//	HAL_UART_Receive_IT(&huart1,recbuf,80);

}

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(uartHandle->Instance==USART1)
  {
  /* USER CODE BEGIN USART1_MspInit 0 */

  /* USER CODE END USART1_MspInit 0 */
    /* USART1 clock enable */
    __HAL_RCC_USART1_CLK_ENABLE();
  
    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**USART1 GPIO Configuration    
    PA9     ------> USART1_TX
    PA10     ------> USART1_RX 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;//GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;//GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
			memset(recbuf,0,sizeof(recbuf));
    /* USART1 interrupt Init */
    HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);//0
    HAL_NVIC_EnableIRQ(USART1_IRQn);
  /* USER CODE BEGIN USART1_MspInit 1 */

  /* USER CODE END USART1_MspInit 1 */
  }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{

  if(uartHandle->Instance==USART1)
  {
  /* USER CODE BEGIN USART1_MspDeInit 0 */

  /* USER CODE END USART1_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_USART1_CLK_DISABLE();
  
    /**USART1 GPIO Configuration    
    PA9     ------> USART1_TX
    PA10     ------> USART1_RX 
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);

    /* USART1 interrupt Deinit */
    HAL_NVIC_DisableIRQ(USART1_IRQn);
  /* USER CODE BEGIN USART1_MspDeInit 1 */

  /* USER CODE END USART1_MspDeInit 1 */
  }
} 

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
		rec_data=1;
}
// Transmit buffer complete call routine
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
	transmit_running = 0;
	HAL_UART_Receive_IT(&huart1,recbuf,100);
}

/**
  * @brief  Receive an amount of data in interrupt mode.
  * @note   Function is called under interruption only, once
  *         interruptions have been enabled by HAL_UART_Receive_IT()
  * @param  huart: UART handle.
  * @retval HAL status
  */
static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart)
{
  uint16_t* tmp;
  uint16_t  uhMask = huart->Mask;
  uint16_t  uhdata;

  /* Check that a Rx process is ongoing */
  if(huart->RxState == HAL_UART_STATE_BUSY_RX)
  {
		//SCB_DisableICache(); // Disable Instruction-cache at beginning of function in case of success! AKASH EDIT
		
    uhdata = (uint16_t) READ_REG(huart->Instance->RDR);
		
    if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
    {
      tmp = (uint16_t*) huart->pRxBuffPtr ;
      *tmp = (uint16_t)(uhdata & uhMask);
      huart->pRxBuffPtr +=2;
    }
    else
    {
      *huart->pRxBuffPtr++ = (uint8_t)(uhdata & (uint8_t)uhMask);
			if(uhdata == '\0')
					huart->RxXferCount = 1;
    }

    if(--huart->RxXferCount == 0U)
    {
													//HAL_GPIO_TogglePin(GPIOE, GPIO_PIN_9);
      /* Disable the UART Parity Error Interrupt and RXNE interrupt*/
      CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));

      /* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
      CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);

      /* Rx process is completed, restore huart->RxState to Ready */
      huart->RxState = HAL_UART_STATE_READY;

      HAL_UART_RxCpltCallback(huart);
			
			//SCB_EnableICache(); // Disable Instruction-cache at beginning of function in case of success! AKASH EDIT
			
      return HAL_OK;
    }

    return HAL_OK;
  }
  else
  {
    /* Clear RXNE interrupt flag */
    __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);

    return HAL_BUSY;
  }
}

/**
  * @brief  Send an amount of data in interrupt mode.
  * @note   Function is called under interruption only, once
  *         interruptions have been enabled by HAL_UART_Transmit_IT().
  * @param  huart: UART handle.
  * @retval HAL status
  */
static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart)
{
  uint16_t* tmp;
	uint16_t  uhdata;
  /* Check that a Tx process is ongoing */
  if (huart->gState == HAL_UART_STATE_BUSY_TX)
  {
    if(huart->TxXferCount == 0U)
    {
      /* Disable the TX FIFO threshold interrupt (if FIFO mode is enabled) or
         Transmit Data Register Empty interrupt (if FIFO mode is Disabled).
      */
      if (READ_BIT(huart->Instance->CR1, USART_CR1_FIFOEN) != RESET)
      {
        CLEAR_BIT(huart->Instance->CR3, USART_CR3_TXFTIE);
      }
      else
      {
        CLEAR_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
      }

      /* Enable the UART Transmit Complete Interrupt */
      SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);

      return HAL_OK;
    }
    else
    {
      if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
      {
        tmp = (uint16_t*) huart->pTxBuffPtr;
        huart->Instance->TDR = (*tmp & (uint16_t)0x01FFU);
        huart->pTxBuffPtr += 2U;
      }
      else
      {
        uhdata = (uint8_t)(*huart->pTxBuffPtr++ & (uint8_t)0xFF);
				huart->Instance->TDR = uhdata;
				if(uhdata == '\0')
				huart->TxXferCount = 1;
//				transmit_running = 1;
      }
      huart->TxXferCount--;

      return HAL_OK;
    }
  }
  else
  {
    return HAL_BUSY;
  }
}

Top replies

Akash Kasturi over 4 years ago in reply to Oliver Beirne +1

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