예제 #1
0
/**
  * @brief  Initializes the IRDA mode according to the specified
  *         parameters in the IRDA_InitTypeDef and create the associated handle.
  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains
  *                the configuration information for the specified IRDA module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_IRDA_Init(IRDA_HandleTypeDef *hirda)
{
  /* Check the IRDA handle allocation */
  if(hirda == NULL)
  {
    return HAL_ERROR;
  }
  
  /* Check the IRDA instance parameters */
  assert_param(IS_IRDA_INSTANCE(hirda->Instance));
  /* Check the IRDA mode parameter in the IRDA handle */
  assert_param(IS_IRDA_POWERMODE(hirda->Init.IrDAMode)); 
  
  if(hirda->State == HAL_IRDA_STATE_RESET)
  {
    /* Allocate lock resource and initialize it */
    hirda->Lock = HAL_UNLOCKED;

    /* Init the low level hardware */
    HAL_IRDA_MspInit(hirda);
  }
  
  hirda->State = HAL_IRDA_STATE_BUSY;
  
  /* Disable the IRDA peripheral */
  __HAL_IRDA_DISABLE(hirda);
  
  /* Set the IRDA communication parameters */
  IRDA_SetConfig(hirda);
  
  /* In IrDA mode, the following bits must be kept cleared: 
     - LINEN, STOP and CLKEN bits in the USART_CR2 register,
     - SCEN and HDSEL bits in the USART_CR3 register.*/
  CLEAR_BIT(hirda->Instance->CR2, (USART_CR2_LINEN | USART_CR2_STOP | USART_CR2_CLKEN));
  CLEAR_BIT(hirda->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL));
  
  /* Enable the IRDA peripheral */
  __HAL_IRDA_ENABLE(hirda);
  
  /* Set the prescaler */
  MODIFY_REG(hirda->Instance->GTPR, USART_GTPR_PSC, hirda->Init.Prescaler);
  
  /* Configure the IrDA mode */
  MODIFY_REG(hirda->Instance->CR3, USART_CR3_IRLP, hirda->Init.IrDAMode);
  
  /* Enable the IrDA mode by setting the IREN bit in the CR3 register */
  SET_BIT(hirda->Instance->CR3, USART_CR3_IREN);
  
  /* Initialize the IRDA state*/
  hirda->ErrorCode = HAL_IRDA_ERROR_NONE;
  hirda->State= HAL_IRDA_STATE_READY;
  
  return HAL_OK;
}
예제 #2
0
/**
  * @brief Initialize the IRDA mode according to the specified
  *        parameters in the IRDA_InitTypeDef and initialize the associated handle.
  * @param hirda: Pointer to a IRDA_HandleTypeDef structure that contains
  *               the configuration information for the specified IRDA module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_IRDA_Init(IRDA_HandleTypeDef *hirda)
{
  /* Check the IRDA handle allocation */
  if(hirda == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the USART/UART associated to the IRDA handle */
  assert_param(IS_IRDA_INSTANCE(hirda->Instance));

  if(hirda->gState == HAL_IRDA_STATE_RESET)
  {
    /* Allocate lock resource and initialize it */
    hirda->Lock = HAL_UNLOCKED;

    /* Init the low level hardware : GPIO, CLOCK */
    HAL_IRDA_MspInit(hirda);
  }

  hirda->gState = HAL_IRDA_STATE_BUSY;

  /* Disable the Peripheral to update the configuration registers */
  __HAL_IRDA_DISABLE(hirda);

  /* Set the IRDA Communication parameters */
  if (IRDA_SetConfig(hirda) == HAL_ERROR)
  {
    return HAL_ERROR;
  }

  /* In IRDA mode, the following bits must be kept cleared:
  - LINEN, STOP and CLKEN bits in the USART_CR2 register,
  - SCEN and HDSEL bits in the USART_CR3 register.*/
  hirda->Instance->CR2 &= ~(USART_CR2_LINEN | USART_CR2_CLKEN | USART_CR2_STOP);
  hirda->Instance->CR3 &= ~(USART_CR3_SCEN | USART_CR3_HDSEL);

  /* set the UART/USART in IRDA mode */
  hirda->Instance->CR3 |= USART_CR3_IREN;

  /* Enable the Peripheral */
  __HAL_IRDA_ENABLE(hirda);

  /* TEACK and/or REACK to check before moving hirda->gState and hirda->RxState to Ready */
  return (IRDA_CheckIdleState(hirda));
}