/**
* @brief Configure the IRDA peripheral
* @param hirda: irda handle
* @retval None
*/
static HAL_StatusTypeDef IRDA_SetConfig(IRDA_HandleTypeDef *hirda)
{
uint32_t tmpreg = 0x00000000;
IRDA_ClockSourceTypeDef clocksource = IRDA_CLOCKSOURCE_UNDEFINED;
HAL_StatusTypeDef ret = HAL_OK;
/* Check the communication parameters */
assert_param(IS_IRDA_BAUDRATE(hirda->Init.BaudRate));
assert_param(IS_IRDA_WORD_LENGTH(hirda->Init.WordLength));
assert_param(IS_IRDA_PARITY(hirda->Init.Parity));
assert_param(IS_IRDA_TX_RX_MODE(hirda->Init.Mode));
assert_param(IS_IRDA_PRESCALER(hirda->Init.Prescaler));
assert_param(IS_IRDA_POWERMODE(hirda->Init.PowerMode));
/*-------------------------- USART CR1 Configuration -----------------------*/
/* Configure the IRDA Word Length, Parity and transfer Mode:
Set the M bits according to hirda->Init.WordLength value
Set PCE and PS bits according to hirda->Init.Parity value
Set TE and RE bits according to hirda->Init.Mode value */
tmpreg = (uint32_t)hirda->Init.WordLength | hirda->Init.Parity | hirda->Init.Mode ;
MODIFY_REG(hirda->Instance->CR1, IRDA_CR1_FIELDS, tmpreg);
/*-------------------------- USART CR3 Configuration -----------------------*/
MODIFY_REG(hirda->Instance->CR3, USART_CR3_IRLP, hirda->Init.PowerMode);
/*-------------------------- USART GTPR Configuration ----------------------*/
MODIFY_REG(hirda->Instance->GTPR, USART_GTPR_PSC, hirda->Init.Prescaler);
/*-------------------------- USART BRR Configuration -----------------------*/
__HAL_IRDA_GETCLOCKSOURCE(hirda, clocksource);
switch (clocksource)
{
case IRDA_CLOCKSOURCE_PCLK1:
hirda->Instance->BRR = (uint16_t)(HAL_RCC_GetPCLK1Freq() / hirda->Init.BaudRate);
break;
case IRDA_CLOCKSOURCE_PCLK2:
hirda->Instance->BRR = (uint16_t)(HAL_RCC_GetPCLK2Freq() / hirda->Init.BaudRate);
break;
case IRDA_CLOCKSOURCE_HSI:
hirda->Instance->BRR = (uint16_t)(HSI_VALUE / hirda->Init.BaudRate);
break;
case IRDA_CLOCKSOURCE_SYSCLK:
hirda->Instance->BRR = (uint16_t)(HAL_RCC_GetSysClockFreq() / hirda->Init.BaudRate);
break;
case IRDA_CLOCKSOURCE_LSE:
hirda->Instance->BRR = (uint16_t)(LSE_VALUE / hirda->Init.BaudRate);
break;
case IRDA_CLOCKSOURCE_UNDEFINED:
default:
ret = HAL_ERROR;
break;
}
return ret;
}
/**
* @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;
}