/**
* @brief Initializes the CEC mode according to the specified
* parameters in the CEC_InitTypeDef and creates the associated handle .
* @param hcec: CEC handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CEC_Init(CEC_HandleTypeDef *hcec)
{
uint32_t tmpreg = 0x0;
/* Check the CEC handle allocation */
if(hcec == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance));
assert_param(IS_CEC_SIGNALFREETIME(hcec->Init.SignalFreeTime));
assert_param(IS_CEC_TOLERANCE(hcec->Init.Tolerance));
assert_param(IS_CEC_BRERXSTOP(hcec->Init.BRERxStop));
assert_param(IS_CEC_BREERRORBITGEN(hcec->Init.BREErrorBitGen));
assert_param(IS_CEC_LBPEERRORBITGEN(hcec->Init.LBPEErrorBitGen));
assert_param(IS_CEC_BROADCASTERROR_NO_ERRORBIT_GENERATION(hcec->Init.BroadcastMsgNoErrorBitGen));
assert_param(IS_CEC_SFTOP(hcec->Init.SignalFreeTimeOption));
assert_param(IS_CEC_OAR_ADDRESS(hcec->Init.OwnAddress));
assert_param(IS_CEC_LISTENING_MODE(hcec->Init.ListenMode));
assert_param(IS_CEC_ADDRESS(hcec->Init.InitiatorAddress));
if(hcec->State == HAL_CEC_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hcec->Lock = HAL_UNLOCKED;
/* Init the low level hardware : GPIO, CLOCK */
HAL_CEC_MspInit(hcec);
}
hcec->State = HAL_CEC_STATE_BUSY;
/* Disable the Peripheral */
__HAL_CEC_DISABLE(hcec);
tmpreg = hcec->Init.SignalFreeTime;
tmpreg |= hcec->Init.Tolerance;
tmpreg |= hcec->Init.BRERxStop;
tmpreg |= hcec->Init.BREErrorBitGen;
tmpreg |= hcec->Init.LBPEErrorBitGen;
tmpreg |= hcec->Init.BroadcastMsgNoErrorBitGen;
tmpreg |= hcec->Init.SignalFreeTimeOption;
tmpreg |= (hcec->Init.OwnAddress << CEC_CFGR_OAR_LSB_POS);
tmpreg |= hcec->Init.ListenMode;
/* Write to CEC Control Register */
MODIFY_REG(hcec->Instance->CFGR, CEC_CFGR_FIELDS, tmpreg);
/* Enable the Peripheral */
__HAL_CEC_ENABLE(hcec);
hcec->State = HAL_CEC_STATE_READY;
return HAL_OK;
}
/**
* @brief Initializes the CEC mode according to the specified
* parameters in the CEC_InitTypeDef and creates the associated handle .
* @param hcec: CEC handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CEC_Init(CEC_HandleTypeDef *hcec)
{
/* Check the CEC handle allocation */
if((hcec == NULL) ||(hcec->Init.RxBuffer == NULL))
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance));
assert_param(IS_CEC_SIGNALFREETIME(hcec->Init.SignalFreeTime));
assert_param(IS_CEC_TOLERANCE(hcec->Init.Tolerance));
assert_param(IS_CEC_BRERXSTOP(hcec->Init.BRERxStop));
assert_param(IS_CEC_BREERRORBITGEN(hcec->Init.BREErrorBitGen));
assert_param(IS_CEC_LBPEERRORBITGEN(hcec->Init.LBPEErrorBitGen));
assert_param(IS_CEC_BROADCASTERROR_NO_ERRORBIT_GENERATION(hcec->Init.BroadcastMsgNoErrorBitGen));
assert_param(IS_CEC_SFTOP(hcec->Init.SignalFreeTimeOption));
assert_param(IS_CEC_LISTENING_MODE(hcec->Init.ListenMode));
assert_param(IS_CEC_OWN_ADDRESS(hcec->Init.OwnAddress));
if(hcec->gState == HAL_CEC_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hcec->Lock = HAL_UNLOCKED;
/* Init the low level hardware : GPIO, CLOCK */
HAL_CEC_MspInit(hcec);
}
hcec->gState = HAL_CEC_STATE_BUSY;
/* Disable the Peripheral */
__HAL_CEC_DISABLE(hcec);
/* Write to CEC Control Register */
hcec->Instance->CFGR = hcec->Init.SignalFreeTime | hcec->Init.Tolerance | hcec->Init.BRERxStop|\
hcec->Init.BREErrorBitGen | hcec->Init.LBPEErrorBitGen | hcec->Init.BroadcastMsgNoErrorBitGen |\
hcec->Init.SignalFreeTimeOption |((uint32_t)(hcec->Init.OwnAddress)<<16U) |\
hcec->Init.ListenMode;
/* Enable the following CEC Transmission/Reception interrupts as
* well as the following CEC Transmission/Reception Errors interrupts
* Rx Byte Received IT
* End of Reception IT
* Rx overrun
* Rx bit rising error
* Rx short bit period error
* Rx long bit period error
* Rx missing acknowledge
* Tx Byte Request IT
* End of Transmission IT
* Tx Missing Acknowledge IT
* Tx-Error IT
* Tx-Buffer Underrun IT
* Tx arbitration lost */
__HAL_CEC_ENABLE_IT(hcec, CEC_IT_RXBR|CEC_IT_RXEND|CEC_IER_RX_ALL_ERR|CEC_IT_TXBR|CEC_IT_TXEND|CEC_IER_TX_ALL_ERR);
/* Enable the CEC Peripheral */
__HAL_CEC_ENABLE(hcec);
hcec->ErrorCode = HAL_CEC_ERROR_NONE;
hcec->gState = HAL_CEC_STATE_READY;
hcec->RxState = HAL_CEC_STATE_READY;
return HAL_OK;
}