stm32f7xx_hal_smartcard.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f7xx_hal.h"

#ifdef HAL_SMARTCARD_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define TEACK_REACK_TIMEOUT               1000U
#define HAL_SMARTCARD_TXDMA_TIMEOUTVALUE  22000U
#define USART_CR1_FIELDS      ((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | \
                                          USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8))
#define USART_CR2_CLK_FIELDS  ((uint32_t)(USART_CR2_CLKEN|USART_CR2_CPOL|USART_CR2_CPHA|USART_CR2_LBCL))   
#define USART_CR2_FIELDS      ((uint32_t)(USART_CR2_RTOEN|USART_CR2_CLK_FIELDS|USART_CR2_STOP))
#define USART_CR3_FIELDS      ((uint32_t)(USART_CR3_ONEBIT|USART_CR3_NACK|USART_CR3_SCARCNT))  

/* Private macros -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void SMARTCARD_DMATransmitCplt(DMA_HandleTypeDef *hdma);
static void SMARTCARD_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
static void SMARTCARD_DMAError(DMA_HandleTypeDef *hdma);
static void SMARTCARD_DMAAbortOnError(DMA_HandleTypeDef *hdma);
static void SMARTCARD_SetConfig(SMARTCARD_HandleTypeDef *hsc);
static HAL_StatusTypeDef SMARTCARD_WaitOnFlagUntilTimeout(SMARTCARD_HandleTypeDef *hsc, uint32_t Flag, FlagStatus Status, uint32_t Tickstart, uint32_t Timeout);
static HAL_StatusTypeDef SMARTCARD_CheckIdleState(SMARTCARD_HandleTypeDef *hsc);
static HAL_StatusTypeDef SMARTCARD_Transmit_IT(SMARTCARD_HandleTypeDef *hsc);
static HAL_StatusTypeDef SMARTCARD_Receive_IT(SMARTCARD_HandleTypeDef *hsc);
static void SMARTCARD_EndTxTransfer(SMARTCARD_HandleTypeDef *hsc);
static void SMARTCARD_EndRxTransfer(SMARTCARD_HandleTypeDef *hsc);
static void SMARTCARD_AdvFeatureConfig(SMARTCARD_HandleTypeDef *hsc);
/* Exported functions --------------------------------------------------------*/
HAL_StatusTypeDef HAL_SMARTCARD_Init(SMARTCARD_HandleTypeDef *hsc)
{
  /* Check the SMARTCARD handle allocation */
  if(hsc == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_SMARTCARD_INSTANCE(hsc->Instance));
  
  if(hsc->gState == HAL_SMARTCARD_STATE_RESET)
  { 
    /* Allocate lock resource and initialize it */
    hsc->Lock = HAL_UNLOCKED; 
    /* Init the low level hardware : GPIO, CLOCK, CORTEX */
    HAL_SMARTCARD_MspInit(hsc);
  }
  
  hsc->gState = HAL_SMARTCARD_STATE_BUSY;

  /* Disable the Peripheral */
  __HAL_SMARTCARD_DISABLE(hsc);

  /* Set the SMARTCARD Communication parameters */
  SMARTCARD_SetConfig(hsc);

  if(hsc->AdvancedInit.AdvFeatureInit != SMARTCARD_ADVFEATURE_NO_INIT)
  {
    SMARTCARD_AdvFeatureConfig(hsc);
  }

  /* In SmartCard mode, the following bits must be kept cleared: 
  - LINEN in the USART_CR2 register,
  - HDSEL and IREN  bits in the USART_CR3 register.*/
  CLEAR_BIT(hsc->Instance->CR2, USART_CR2_LINEN);
  CLEAR_BIT(hsc->Instance->CR3, (USART_CR3_IREN | USART_CR3_HDSEL));

  /* set the USART in SMARTCARD mode */
  SET_BIT(hsc->Instance->CR3, USART_CR3_SCEN);
  
  /* Enable the Peripheral */
  __HAL_SMARTCARD_ENABLE(hsc);
  
  /* TEACK and/or REACK to check before moving hsc->State to Ready */
  return (SMARTCARD_CheckIdleState(hsc));
}

HAL_StatusTypeDef HAL_SMARTCARD_DeInit(SMARTCARD_HandleTypeDef *hsc)
{
  /* Check the SMARTCARD handle allocation */
  if(hsc == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_SMARTCARD_INSTANCE(hsc->Instance));

  hsc->gState = HAL_SMARTCARD_STATE_BUSY;

  /* DeInit the low level hardware */
  HAL_SMARTCARD_MspDeInit(hsc);

  hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
  hsc->gState = HAL_SMARTCARD_STATE_RESET;
  hsc->RxState = HAL_SMARTCARD_STATE_RESET;

  /* Release Lock */
  __HAL_UNLOCK(hsc);

  return HAL_OK;
}

 __weak void HAL_SMARTCARD_MspInit(SMARTCARD_HandleTypeDef *hsc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hsc);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SMARTCARD_MspInit could be implemented in the user file
   */
}

 __weak void HAL_SMARTCARD_MspDeInit(SMARTCARD_HandleTypeDef *hsc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hsc);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SMARTCARD_MspDeInit could be implemented in the user file
   */
}

HAL_StatusTypeDef HAL_SMARTCARD_Transmit(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0U;
  
  if(hsc->gState == HAL_SMARTCARD_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return  HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);
    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;    
    hsc->gState = HAL_SMARTCARD_STATE_BUSY_TX;
    
    /* Init tickstart for timeout managment*/
    tickstart = HAL_GetTick();
    
    hsc->TxXferSize = Size;
    hsc->TxXferCount = Size;
    while(hsc->TxXferCount > 0U)
    {
      hsc->TxXferCount--;
      if(SMARTCARD_WaitOnFlagUntilTimeout(hsc, SMARTCARD_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)  
      { 
        return HAL_TIMEOUT;
      }
      hsc->Instance->TDR = (*pData++ & (uint8_t)0xFFU);
    }
    if(SMARTCARD_WaitOnFlagUntilTimeout(hsc, SMARTCARD_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)  
    { 
      return HAL_TIMEOUT;
    }
    
    /* At end of Tx process, restore hsc->gState to Ready */
    hsc->gState = HAL_SMARTCARD_STATE_READY;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsc);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

HAL_StatusTypeDef HAL_SMARTCARD_Receive(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0U;
  
  if(hsc->RxState == HAL_SMARTCARD_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return  HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);
    
    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    hsc->RxState = HAL_SMARTCARD_STATE_BUSY_RX;
    
    /* Init tickstart for timeout managment*/
    tickstart = HAL_GetTick();

    hsc->RxXferSize = Size;
    hsc->RxXferCount = Size;
    /* Check the remain data to be received */
    while(hsc->RxXferCount > 0U)
    {
      hsc->RxXferCount--;
      if(SMARTCARD_WaitOnFlagUntilTimeout(hsc, SMARTCARD_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)  
      {
        return HAL_TIMEOUT;
      }
      *pData++ = (uint8_t)(hsc->Instance->RDR & (uint8_t)0x00FFU);
    }

    /* At end of Rx process, restore hsc->RxState to Ready */
    hsc->RxState = HAL_SMARTCARD_STATE_READY;

    /* Process Unlocked */
    __HAL_UNLOCK(hsc);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

HAL_StatusTypeDef HAL_SMARTCARD_Transmit_IT(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  /* Check that a Tx process is not already ongoing */
  if(hsc->gState == HAL_SMARTCARD_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pTxBuffPtr = pData;
    hsc->TxXferSize = Size;
    hsc->TxXferCount = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    hsc->gState = HAL_SMARTCARD_STATE_BUSY_TX;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsc);

    /* Enable the SMARTCARD Error Interrupt: (Frame error, noise error, overrun error) */
    CLEAR_BIT(hsc->Instance->CR3, USART_CR3_EIE);

    /* Enable the SMARTCARD Transmit Complete Interrupt */
    CLEAR_BIT(hsc->Instance->CR1, USART_CR1_TCIE);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

HAL_StatusTypeDef HAL_SMARTCARD_Receive_IT(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  /* Check that a Rx process is not already ongoing */ 
  if(hsc->RxState == HAL_SMARTCARD_STATE_READY) 
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pRxBuffPtr = pData;
    hsc->RxXferSize = Size;
    hsc->RxXferCount = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    hsc->RxState = HAL_SMARTCARD_STATE_BUSY_RX;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsc);
    
    /* Enable the SMARTCARD Parity Error Interrupt */
    SET_BIT(hsc->Instance->CR1, USART_CR1_PEIE);

    /* Enable the SMARTCARD Error Interrupt: (Frame error, noise error, overrun error) */
    SET_BIT(hsc->Instance->CR3, USART_CR3_EIE);

    /* Enable the SMARTCARD Data Register not empty Interrupt */
    SET_BIT(hsc->Instance->CR1, USART_CR1_RXNEIE);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

HAL_StatusTypeDef HAL_SMARTCARD_Transmit_DMA(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  
  /* Check that a Tx process is not already ongoing */
  if(hsc->gState == HAL_SMARTCARD_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pTxBuffPtr = pData;
    hsc->TxXferSize = Size;
    hsc->TxXferCount = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    hsc->gState = HAL_SMARTCARD_STATE_BUSY_TX;

    /* Set the SMARTCARD DMA transfer complete callback */
    hsc->hdmatx->XferCpltCallback = SMARTCARD_DMATransmitCplt;

    /* Set the SMARTCARD error callback */
    hsc->hdmatx->XferErrorCallback = SMARTCARD_DMAError;
    
    /* Set the DMA abort callback */
    hsc->hdmatx->XferAbortCallback = NULL;

    /* Enable the SMARTCARD transmit DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsc->hdmatx, *(uint32_t*)tmp, (uint32_t)&hsc->Instance->TDR, Size);
    
    /* Clear the TC flag in the SR register by writing 0 to it */
    __HAL_SMARTCARD_CLEAR_IT(hsc, SMARTCARD_FLAG_TC);
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsc);

    /* Enable the DMA transfer for transmit request by setting the DMAT bit
       in the SMARTCARD associated USART CR3 register */
    SET_BIT(hsc->Instance->CR3, USART_CR3_DMAT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

HAL_StatusTypeDef HAL_SMARTCARD_Receive_DMA(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  
  /* Check that a Rx process is not already ongoing */
  if(hsc->RxState == HAL_SMARTCARD_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pRxBuffPtr = pData;
    hsc->RxXferSize = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    hsc->RxState = HAL_SMARTCARD_STATE_BUSY_RX;

    /* Set the SMARTCARD DMA transfer complete callback */
    hsc->hdmarx->XferCpltCallback = SMARTCARD_DMAReceiveCplt;

    /* Set the SMARTCARD DMA error callback */
    hsc->hdmarx->XferErrorCallback = SMARTCARD_DMAError;
    
    /* Set the DMA abort callback */
    hsc->hdmatx->XferAbortCallback = NULL;

    /* Enable the DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsc->hdmarx, (uint32_t)&hsc->Instance->RDR, *(uint32_t*)tmp, Size);
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsc);
    
    /* Enable the SMARTCARD Parity Error Interrupt */
    SET_BIT(hsc->Instance->CR1, USART_CR1_PEIE);

    /* Enable the SMARTCARD Error Interrupt: (Frame error, noise error, overrun error) */
    SET_BIT(hsc->Instance->CR3, USART_CR3_EIE);

    /* Enable the DMA transfer for the receiver request by setting the DMAR bit 
    in the SMARTCARD associated USART CR3 register */
    SET_BIT(hsc->Instance->CR3, USART_CR3_DMAR);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}
    
void HAL_SMARTCARD_IRQHandler(SMARTCARD_HandleTypeDef *hsc)
{
  uint32_t isrflags   = READ_REG(hsc->Instance->ISR);
  uint32_t cr1its     = READ_REG(hsc->Instance->CR1);
  uint32_t cr3its     = READ_REG(hsc->Instance->CR3);
  uint32_t dmarequest = 0x00U;
  uint32_t errorflags = 0x00U;

  /* If no error occurs */
  errorflags = (isrflags & (uint32_t)(USART_ISR_PE | USART_ISR_FE | USART_ISR_ORE | USART_ISR_NE));
  if(errorflags == RESET)
  {
    /* SMARTCARD in mode Receiver -------------------------------------------------*/
    if(((isrflags & USART_ISR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
    {
      SMARTCARD_Receive_IT(hsc);
      return;
    }
  }

  /* If some errors occur */
  if((errorflags != RESET) && ((cr3its & (USART_CR3_EIE | USART_CR1_PEIE)) != RESET))
  {
    /* SMARTCARD parity error interrupt occurred ---------------------------*/
    if(((isrflags & SMARTCARD_FLAG_PE) != RESET) && ((cr1its & USART_CR1_PEIE) != RESET))
    { 
      hsc->ErrorCode |= HAL_SMARTCARD_ERROR_PE;
    }

    /* SMARTCARD frame error interrupt occurred ----------------------------*/
    if(((isrflags & SMARTCARD_FLAG_FE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
    { 
      hsc->ErrorCode |= HAL_SMARTCARD_ERROR_FE;
    }

    /* SMARTCARD noise error interrupt occurred ----------------------------*/
    if(((isrflags & SMARTCARD_FLAG_NE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
    { 
      hsc->ErrorCode |= HAL_SMARTCARD_ERROR_NE;
    }

    /* SMARTCARD Over-Run interrupt occurred -------------------------------*/
    if(((isrflags & SMARTCARD_FLAG_ORE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
    { 
      hsc->ErrorCode |= HAL_SMARTCARD_ERROR_ORE;
    }
    /* Call the Error call Back in case of Errors */
    if(hsc->ErrorCode != HAL_SMARTCARD_ERROR_NONE)
    {
      /* SMARTCARD in mode Receiver -----------------------------------------------*/
      if(((isrflags & USART_ISR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
      {
        SMARTCARD_Receive_IT(hsc);
      }

      /* If Overrun error occurs, or if any error occurs in DMA mode reception,
         consider error as blocking */
      dmarequest = HAL_IS_BIT_SET(hsc->Instance->CR3, USART_CR3_DMAR);
      if(((hsc->ErrorCode & HAL_SMARTCARD_ERROR_ORE) != RESET) || dmarequest)
      {
        /* Blocking error : transfer is aborted
          Set the SMARTCARD state ready to be able to start again the process,
          Disable Rx Interrupts, and disable Rx DMA request, if ongoing */
        SMARTCARD_EndRxTransfer(hsc);
        /* Disable the SMARTCARD DMA Rx request if enabled */
        if (HAL_IS_BIT_SET(hsc->Instance->CR3, USART_CR3_DMAR))
        {
          CLEAR_BIT(hsc->Instance->CR3, USART_CR3_DMAR);

          /* Abort the SMARTCARD DMA Rx channel */
          if(hsc->hdmarx != NULL)
          {
            /* Set the SMARTCARD DMA Abort callback : 
              will lead to call HAL_SMARTCARD_ErrorCallback() at end of DMA abort procedure */
            hsc->hdmarx->XferAbortCallback = SMARTCARD_DMAAbortOnError;

           if(HAL_DMA_Abort_IT(hsc->hdmarx) != HAL_OK)
            {
              /* Call Directly XferAbortCallback function in case of error */
              hsc->hdmarx->XferAbortCallback(hsc->hdmarx);
            }
          }
          else
          {
            /* Call user error callback */
            HAL_SMARTCARD_ErrorCallback(hsc);
          }
        }
        else
        {
          /* Call user error callback */
          HAL_SMARTCARD_ErrorCallback(hsc);
        }
      }
      else
      {
        /* Call user error callback */
        HAL_SMARTCARD_ErrorCallback(hsc);
        hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
      }
    }
    return;
  } /* End if some error occurs */
  
  /* SMARTCARD in mode Transmitter -------------------------------------------*/
  if(((isrflags & SMARTCARD_FLAG_TXE) != RESET) && ((cr1its & USART_CR1_TXEIE) != RESET))
  {
    SMARTCARD_Transmit_IT(hsc);
    return;
  }
  
  /* SMARTCARD in mode Transmitter (transmission end) ------------------------*/
  if(((isrflags & SMARTCARD_FLAG_TC) != RESET) && ((cr1its & USART_CR1_TCIE) != RESET))
  {
    /* Disable the SMARTCARD Transmit Complete Interrupt */   
    CLEAR_BIT(hsc->Instance->CR1, USART_CR1_TCIE);

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

    /* Tx process is ended, restore hsmartcard->gState to Ready */
    hsc->gState = HAL_SMARTCARD_STATE_READY;

    HAL_SMARTCARD_TxCpltCallback(hsc);
    
    return;
  }
}

 __weak void HAL_SMARTCARD_TxCpltCallback(SMARTCARD_HandleTypeDef *hsc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hsc);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SMARTCARD_TxCpltCallback could be implemented in the user file
   */ 
}

__weak void HAL_SMARTCARD_RxCpltCallback(SMARTCARD_HandleTypeDef *hsc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hsc);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SMARTCARD_TxCpltCallback could be implemented in the user file
   */
}

 __weak void HAL_SMARTCARD_ErrorCallback(SMARTCARD_HandleTypeDef *hsc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hsc);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SMARTCARD_ErrorCallback could be implemented in the user file
   */
}

HAL_SMARTCARD_StateTypeDef HAL_SMARTCARD_GetState(SMARTCARD_HandleTypeDef *hsc)
{
  uint32_t temp1= 0x00U, temp2 = 0x00U;
  temp1 = hsc->gState;
  temp2 = hsc->RxState;
  
  return (HAL_SMARTCARD_StateTypeDef)(temp1 | temp2);
}

uint32_t HAL_SMARTCARD_GetError(SMARTCARD_HandleTypeDef *hsc)
{
  return hsc->ErrorCode;
}

static HAL_StatusTypeDef SMARTCARD_Transmit_IT(SMARTCARD_HandleTypeDef *hsc)
{
  if(hsc->gState == HAL_SMARTCARD_STATE_BUSY_TX)
  {
    if(hsc->TxXferCount == 0)
    {
      /* Disable the SMARTCARD Transmit Complete Interrupt */
      CLEAR_BIT(hsc->Instance->CR1, USART_CR1_TXEIE);
      
      /* Disable the SMARTCARD Error Interrupt: (Frame error, noise error, overrun error) */
      CLEAR_BIT(hsc->Instance->CR3, USART_CR3_EIE);
      
      /* Tx process is ended, restore hsmartcard->gState to Ready */
      hsc->gState = HAL_SMARTCARD_STATE_READY;
    }
    
    HAL_SMARTCARD_TxCpltCallback(hsc);
    
    return HAL_OK;
  }
  else
  {    
    hsc->Instance->TDR = (*hsc->pTxBuffPtr++ & (uint8_t)0xFFU);
    hsc->TxXferCount--;
    
    return HAL_OK;
  }
}

static HAL_StatusTypeDef SMARTCARD_Receive_IT(SMARTCARD_HandleTypeDef *hsc)
{
  /* Check that a Rx process is ongoing */
  if(hsc->RxState == HAL_SMARTCARD_STATE_BUSY_RX) 
  {
    *hsc->pRxBuffPtr++ = (uint8_t)(hsc->Instance->RDR & (uint8_t)0xFFU);
    
    if(--hsc->RxXferCount == 0)
    {
      CLEAR_BIT(hsc->Instance->CR1, USART_CR1_RXNEIE);
      
      /* Disable the SMARTCARD Parity Error Interrupt */
      CLEAR_BIT(hsc->Instance->CR1, USART_CR1_PEIE);
      
      /* Disable the SMARTCARD Error Interrupt: (Frame error, noise error, overrun error) */
      CLEAR_BIT(hsc->Instance->CR3, USART_CR3_EIE);
      
      hsc->RxState = HAL_SMARTCARD_STATE_READY;
      
      HAL_SMARTCARD_RxCpltCallback(hsc);
      
      return HAL_OK;
    }
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

static void SMARTCARD_SetConfig(SMARTCARD_HandleTypeDef *hsc)
{
  uint32_t tmpreg      = 0x00000000U;
  uint32_t clocksource = 0x00000000U;
  
  /* Check the parameters */ 
  assert_param(IS_SMARTCARD_INSTANCE(hsc->Instance));
  assert_param(IS_SMARTCARD_BAUDRATE(hsc->Init.BaudRate)); 
  assert_param(IS_SMARTCARD_WORD_LENGTH(hsc->Init.WordLength));  
  assert_param(IS_SMARTCARD_STOPBITS(hsc->Init.StopBits));   
  assert_param(IS_SMARTCARD_PARITY(hsc->Init.Parity));
  assert_param(IS_SMARTCARD_MODE(hsc->Init.Mode));
  assert_param(IS_SMARTCARD_POLARITY(hsc->Init.CLKPolarity));
  assert_param(IS_SMARTCARD_PHASE(hsc->Init.CLKPhase));
  assert_param(IS_SMARTCARD_LASTBIT(hsc->Init.CLKLastBit));    
  assert_param(IS_SMARTCARD_ONE_BIT_SAMPLE(hsc->Init.OneBitSampling));
  assert_param(IS_SMARTCARD_NACK(hsc->Init.NACKState));
  assert_param(IS_SMARTCARD_TIMEOUT(hsc->Init.TimeOutEnable));
  assert_param(IS_SMARTCARD_AUTORETRY_COUNT(hsc->Init.AutoRetryCount)); 

  /*-------------------------- USART CR1 Configuration -----------------------*/
  /* In SmartCard mode, M and PCE are forced to 1 (8 bits + parity).
   * Oversampling is forced to 16 (OVER8 = 0).
   * Configure the Parity and Mode: 
   *  set PS bit according to hsc->Init.Parity value
   *  set TE and RE bits according to hsc->Init.Mode value */
  tmpreg = (uint32_t) hsc->Init.Parity | hsc->Init.Mode;
  /* in case of TX-only mode, if NACK is enabled, the USART must be able to monitor 
     the bidirectional line to detect a NACK signal in case of parity error. 
     Therefore, the receiver block must be enabled as well (RE bit must be set). */
  if((hsc->Init.Mode == SMARTCARD_MODE_TX) && (hsc->Init.NACKState == SMARTCARD_NACK_ENABLE))
  {
    tmpreg |= USART_CR1_RE;   
  }
  tmpreg |= (uint32_t) hsc->Init.WordLength;
  MODIFY_REG(hsc->Instance->CR1, USART_CR1_FIELDS, tmpreg);

  /*-------------------------- USART CR2 Configuration -----------------------*/
  /* Stop bits are forced to 1.5 (STOP = 11) */
  tmpreg = hsc->Init.StopBits;
  /* Synchronous mode is activated by default */
  tmpreg |= (uint32_t) USART_CR2_CLKEN | hsc->Init.CLKPolarity; 
  tmpreg |= (uint32_t) hsc->Init.CLKPhase | hsc->Init.CLKLastBit;
  tmpreg |= (uint32_t) hsc->Init.TimeOutEnable;
  MODIFY_REG(hsc->Instance->CR2, USART_CR2_FIELDS, tmpreg); 
    
  /*-------------------------- USART CR3 Configuration -----------------------*/
  /* Configure 
   * - one-bit sampling method versus three samples' majority rule 
   *   according to hsc->Init.OneBitSampling 
   * - NACK transmission in case of parity error according 
   *   to hsc->Init.NACKEnable   
   * - autoretry counter according to hsc->Init.AutoRetryCount     */
  tmpreg =  (uint32_t) hsc->Init.OneBitSampling | hsc->Init.NACKState;
  tmpreg |= (uint32_t) (hsc->Init.AutoRetryCount << SMARTCARD_CR3_SCARCNT_LSB_POS);
  MODIFY_REG(hsc->Instance-> CR3,USART_CR3_FIELDS, tmpreg);
  
  /*-------------------------- USART GTPR Configuration ----------------------*/
  tmpreg = (uint32_t) (hsc->Init.Prescaler | (hsc->Init.GuardTime << SMARTCARD_GTPR_GT_LSB_POS));
  MODIFY_REG(hsc->Instance->GTPR, (uint32_t)(USART_GTPR_GT|USART_GTPR_PSC), tmpreg); 
  
  /*-------------------------- USART RTOR Configuration ----------------------*/ 
  tmpreg =   (uint32_t) (hsc->Init.BlockLength << SMARTCARD_RTOR_BLEN_LSB_POS);
  if(hsc->Init.TimeOutEnable == SMARTCARD_TIMEOUT_ENABLE)
  {
    assert_param(IS_SMARTCARD_TIMEOUT_VALUE(hsc->Init.TimeOutValue));
    tmpreg |=  (uint32_t) hsc->Init.TimeOutValue;
  }
  MODIFY_REG(hsc->Instance->RTOR, (USART_RTOR_RTO|USART_RTOR_BLEN), tmpreg);
  
  /*-------------------------- USART BRR Configuration -----------------------*/
  SMARTCARD_GETCLOCKSOURCE(hsc, clocksource);
  switch (clocksource)
  {
  case SMARTCARD_CLOCKSOURCE_PCLK1: 
    hsc->Instance->BRR = (uint16_t)((HAL_RCC_GetPCLK1Freq() + (hsc->Init.BaudRate/2))/ hsc->Init.BaudRate);
    break;
  case SMARTCARD_CLOCKSOURCE_PCLK2: 
    hsc->Instance->BRR = (uint16_t)((HAL_RCC_GetPCLK2Freq() + (hsc->Init.BaudRate/2))/ hsc->Init.BaudRate);
    break;
  case SMARTCARD_CLOCKSOURCE_HSI: 
    hsc->Instance->BRR = (uint16_t)((HSI_VALUE + (hsc->Init.BaudRate/2))/ hsc->Init.BaudRate); 
    break; 
  case SMARTCARD_CLOCKSOURCE_SYSCLK:  
    hsc->Instance->BRR = (uint16_t)((HAL_RCC_GetSysClockFreq() + (hsc->Init.BaudRate/2))/ hsc->Init.BaudRate);
    break;  
  case SMARTCARD_CLOCKSOURCE_LSE:                
    hsc->Instance->BRR = (uint16_t)((LSE_VALUE + (hsc->Init.BaudRate/2))/ hsc->Init.BaudRate); 
    break;
  default:
    break;
  } 
}

static HAL_StatusTypeDef SMARTCARD_CheckIdleState(SMARTCARD_HandleTypeDef *hsc)
{
  uint32_t tickstart = 0U;
  
  /* Initialize the SMARTCARD ErrorCode */
  hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
  
  /* Init tickstart for timeout managment*/
  tickstart = HAL_GetTick();

  /* Check if the Transmitter is enabled */
  if((hsc->Instance->CR1 & USART_CR1_TE) == USART_CR1_TE)
  {
    /* Wait until TEACK flag is set */
    if(SMARTCARD_WaitOnFlagUntilTimeout(hsc, USART_ISR_TEACK, RESET, tickstart, TEACK_REACK_TIMEOUT) != HAL_OK)  
    { 
      return HAL_TIMEOUT;
    } 
  }
  /* Check if the Receiver is enabled */
  if((hsc->Instance->CR1 & USART_CR1_RE) == USART_CR1_RE)
  {
    /* Wait until REACK flag is set */
    if(SMARTCARD_WaitOnFlagUntilTimeout(hsc, USART_ISR_REACK, RESET, tickstart, TEACK_REACK_TIMEOUT) != HAL_OK)  
    { 
      return HAL_TIMEOUT;
    }
  }
  
  /* Process Unlocked */
  __HAL_UNLOCK(hsc);
        
  /* Initialize the SMARTCARD state*/
  hsc->gState= HAL_SMARTCARD_STATE_READY;
  hsc->RxState= HAL_SMARTCARD_STATE_READY;
  
  return HAL_OK;
}

static void SMARTCARD_AdvFeatureConfig(SMARTCARD_HandleTypeDef *hsc)
{  
  /* Check whether the set of advanced features to configure is properly set */ 
  assert_param(IS_SMARTCARD_ADVFEATURE_INIT(hsc->AdvancedInit.AdvFeatureInit));
  
  /* if required, configure TX pin active level inversion */
  if(HAL_IS_BIT_SET(hsc->AdvancedInit.AdvFeatureInit, SMARTCARD_ADVFEATURE_TXINVERT_INIT))
  {
    assert_param(IS_SMARTCARD_ADVFEATURE_TXINV(hsc->AdvancedInit.TxPinLevelInvert));
    MODIFY_REG(hsc->Instance->CR2, USART_CR2_TXINV, hsc->AdvancedInit.TxPinLevelInvert);
  }
  
  /* if required, configure RX pin active level inversion */
  if(HAL_IS_BIT_SET(hsc->AdvancedInit.AdvFeatureInit, SMARTCARD_ADVFEATURE_RXINVERT_INIT))
  {
    assert_param(IS_SMARTCARD_ADVFEATURE_RXINV(hsc->AdvancedInit.RxPinLevelInvert));
    MODIFY_REG(hsc->Instance->CR2, USART_CR2_RXINV, hsc->AdvancedInit.RxPinLevelInvert);
  }
  
  /* if required, configure data inversion */
  if(HAL_IS_BIT_SET(hsc->AdvancedInit.AdvFeatureInit, SMARTCARD_ADVFEATURE_DATAINVERT_INIT))
  {
    assert_param(IS_SMARTCARD_ADVFEATURE_DATAINV(hsc->AdvancedInit.DataInvert));
    MODIFY_REG(hsc->Instance->CR2, USART_CR2_DATAINV, hsc->AdvancedInit.DataInvert);
  }
  
  /* if required, configure RX/TX pins swap */
  if(HAL_IS_BIT_SET(hsc->AdvancedInit.AdvFeatureInit, SMARTCARD_ADVFEATURE_SWAP_INIT))
  {
    assert_param(IS_SMARTCARD_ADVFEATURE_SWAP(hsc->AdvancedInit.Swap));
    MODIFY_REG(hsc->Instance->CR2, USART_CR2_SWAP, hsc->AdvancedInit.Swap);
  }
  
  /* if required, configure RX overrun detection disabling */
  if(HAL_IS_BIT_SET(hsc->AdvancedInit.AdvFeatureInit, SMARTCARD_ADVFEATURE_RXOVERRUNDISABLE_INIT))
  {
    assert_param(IS_SMARTCARD_OVERRUN(hsc->AdvancedInit.OverrunDisable));  
    MODIFY_REG(hsc->Instance->CR3, USART_CR3_OVRDIS, hsc->AdvancedInit.OverrunDisable);
  }
  
  /* if required, configure DMA disabling on reception error */
  if(HAL_IS_BIT_SET(hsc->AdvancedInit.AdvFeatureInit, SMARTCARD_ADVFEATURE_DMADISABLEONERROR_INIT))
  {
    assert_param(IS_SMARTCARD_ADVFEATURE_DMAONRXERROR(hsc->AdvancedInit.DMADisableonRxError));   
    MODIFY_REG(hsc->Instance->CR3, USART_CR3_DDRE, hsc->AdvancedInit.DMADisableonRxError);
  }
  
  /* if required, configure MSB first on communication line */  
  if(HAL_IS_BIT_SET(hsc->AdvancedInit.AdvFeatureInit, SMARTCARD_ADVFEATURE_MSBFIRST_INIT))
  {
    assert_param(IS_SMARTCARD_ADVFEATURE_MSBFIRST(hsc->AdvancedInit.MSBFirst));   
    MODIFY_REG(hsc->Instance->CR2, USART_CR2_MSBFIRST, hsc->AdvancedInit.MSBFirst);
  }
}
  
static HAL_StatusTypeDef SMARTCARD_WaitOnFlagUntilTimeout(SMARTCARD_HandleTypeDef *hsc, uint32_t Flag, FlagStatus Status, uint32_t Tickstart, uint32_t Timeout)
{
  /* Wait until flag is set */
  while((__HAL_SMARTCARD_GET_FLAG(hsc, Flag) ? SET : RESET) == Status)
  {
    /* Check for the Timeout */
    if(Timeout != HAL_MAX_DELAY)
    {
      if((Timeout == 0U)||((HAL_GetTick() - Tickstart ) > Timeout))
      {
        /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
        CLEAR_BIT(hsc->Instance->CR1, USART_CR1_TXEIE);
        CLEAR_BIT(hsc->Instance->CR1, USART_CR1_RXNEIE);
        __HAL_SMARTCARD_DISABLE_IT(hsc, SMARTCARD_IT_PE);
        __HAL_SMARTCARD_DISABLE_IT(hsc, SMARTCARD_IT_ERR);
        CLEAR_BIT(hsc->Instance->CR1, USART_CR1_PEIE);
        CLEAR_BIT(hsc->Instance->CR3, USART_CR3_EIE);
        
        hsc->gState= HAL_SMARTCARD_STATE_READY;
        hsc->RxState= HAL_SMARTCARD_STATE_READY;
        
        /* Process Unlocked */
        __HAL_UNLOCK(hsc);
        
        return HAL_TIMEOUT;
      }
    }
  }
  return HAL_OK;
}

/*
  * @brief  End ongoing Tx transfer on SMARTCARD peripheral (following error detection or Transmit completion).
  * @param  hsc: SMARTCARD handle.
  * @retval None
  */
static void SMARTCARD_EndTxTransfer(SMARTCARD_HandleTypeDef *hsc)
{
  /* Disable TXEIE and TCIE interrupts */
  CLEAR_BIT(hsc->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  
  /* At end of Tx process, restore hsc->gState to Ready */
  hsc->gState = HAL_SMARTCARD_STATE_READY;
}


static void SMARTCARD_EndRxTransfer(SMARTCARD_HandleTypeDef *hsc)
{
  /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  CLEAR_BIT(hsc->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  CLEAR_BIT(hsc->Instance->CR3, USART_CR3_EIE);
  
  /* At end of Rx process, restore hsc->RxState to Ready */
  hsc->RxState = HAL_SMARTCARD_STATE_READY;
}

static void SMARTCARD_DMATransmitCplt(DMA_HandleTypeDef *hdma)     
{ 
  SMARTCARD_HandleTypeDef* hsc = ( SMARTCARD_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  hsc->TxXferCount = 0;
  
  /* Disable the DMA transfer for transmit request by setting the DMAT bit
  in the USART CR3 register */
  CLEAR_BIT(hsc->Instance->CR3, USART_CR3_DMAT);
  
  /* Enable the SMARTCARD Transmit Complete Interrupt */   
  SET_BIT(hsc->Instance->CR1, USART_CR1_TCIE);
}

static void SMARTCARD_DMAReceiveCplt(DMA_HandleTypeDef *hdma)  
{
  SMARTCARD_HandleTypeDef* hsc = ( SMARTCARD_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  hsc->RxXferCount = 0;
  
  /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  CLEAR_BIT(hsc->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  CLEAR_BIT(hsc->Instance->CR3, USART_CR3_EIE);
  
  /* Disable the DMA transfer for the receiver request by setting the DMAR bit 
     in the SMARTCARD associated USART CR3 register */
  CLEAR_BIT(hsc->Instance->CR3, USART_CR3_DMAR);
  
  /* At end of Rx process, restore hsc->RxState to Ready */
  hsc->RxState = HAL_SMARTCARD_STATE_READY;
  
  HAL_SMARTCARD_RxCpltCallback(hsc);
}

static void SMARTCARD_DMAError(DMA_HandleTypeDef *hdma)
{
  SMARTCARD_HandleTypeDef* hsc = ( SMARTCARD_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  hsc->RxXferCount = 0U;
  hsc->TxXferCount = 0U;
  hsc->ErrorCode = HAL_SMARTCARD_ERROR_DMA;
  
  /* Stop SMARTCARD DMA Tx request if ongoing */
  if (  (hsc->gState == HAL_SMARTCARD_STATE_BUSY_TX)
      &&(HAL_IS_BIT_SET(hsc->Instance->CR3, USART_CR3_DMAT)) )
  {
    SMARTCARD_EndTxTransfer(hsc);
  }
  
  /* Stop SMARTCARD DMA Rx request if ongoing */
  if (  (hsc->RxState == HAL_SMARTCARD_STATE_BUSY_RX)
      &&(HAL_IS_BIT_SET(hsc->Instance->CR3, USART_CR3_DMAR)) )
  {
    SMARTCARD_EndRxTransfer(hsc);
  }
  
  HAL_SMARTCARD_ErrorCallback(hsc);
}

static void SMARTCARD_DMAAbortOnError(DMA_HandleTypeDef *hdma)
{
  SMARTCARD_HandleTypeDef* hsc = ( SMARTCARD_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  hsc->RxXferCount = 0U;
  hsc->TxXferCount = 0U;

  HAL_SMARTCARD_ErrorCallback(hsc);
}

#endif /* HAL_SMARTCARD_MODULE_ENABLED */

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