/**
* @brief Send data in interrupt mode
* @param hcec: CEC handle.
* Function called under interruption only, once
* interruptions have been enabled by HAL_CEC_Transmit_IT()
* @retval HAL status
*/
static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec)
{
/* if the IP is already busy or if there is a previous transmission
already pending due to arbitration loss */
if ((hcec->State == HAL_CEC_STATE_BUSY_TX)
|| (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET))
{
/* set state to BUSY TX, in case it wasn't set already (case
* of transmission new attempt after arbitration loss) */
if (hcec->State != HAL_CEC_STATE_BUSY_TX)
{
hcec->State = HAL_CEC_STATE_BUSY_TX;
}
/* if all data have been sent */
if(hcec->TxXferCount == 0)
{
/* Disable Peripheral to write CEC_IER register */
__HAL_CEC_DISABLE(hcec);
/* Disable the CEC Transmission Interrupts */
__HAL_CEC_DISABLE_IT(hcec, CEC_IER_TXBRIE|CEC_IER_TXENDIE);
/* Disable the CEC Transmission Error Interrupts */
__HAL_CEC_DISABLE_IT(hcec, CEC_IER_TX_ALL_ERR);
/* Enable the Peripheral */
__HAL_CEC_ENABLE(hcec);
__HAL_CEC_CLEAR_FLAG(hcec,CEC_ISR_TXBR|CEC_ISR_TXEND);
hcec->State = HAL_CEC_STATE_READY;
HAL_CEC_TxCpltCallback(hcec);
return HAL_OK;
}
else
{
if (hcec->TxXferCount == 1)
{
/* if this is the last byte transmission, set TX End of Message (TXEOM) bit */
__HAL_CEC_LAST_BYTE_TX_SET(hcec);
}
/* clear Tx-Byte request flag */
__HAL_CEC_CLEAR_FLAG(hcec,CEC_ISR_TXBR);
hcec->Instance->TXDR = *hcec->pTxBuffPtr++;
hcec->TxXferCount--;
return HAL_OK;
}
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Send data in interrupt mode
* @param hcec: CEC handle.
* Function called under interruption only, once
* interruptions have been enabled by HAL_CEC_Transmit_IT()
* @retval HAL status
*/
static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec)
{
/* if the IP is already busy or if there is a previous transmission
already pending due to arbitration loss */
if((hcec->gState == HAL_CEC_STATE_BUSY_TX) || (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET))
{
/* if all data have been sent */
if(hcec->TxXferCount == 0U)
{
/* Acknowledge successful completion by writing 0x00 */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00U);
hcec->gState = HAL_CEC_STATE_READY;
HAL_CEC_TxCpltCallback(hcec);
return HAL_OK;
}
else
{
/* Reduce the number of bytes to transfer by one */
hcec->TxXferCount--;
/* Write data to TX buffer*/
hcec->Instance->TXD = *hcec->pTxBuffPtr++;
/* If this is the last byte of the ongoing transmission */
if(hcec->TxXferCount == 0U)
{
/* Acknowledge byte request and signal end of message */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM);
}
else
{
/* Acknowledge byte request by writing 0x00 */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00U);
}
return HAL_OK;
}
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Send data in interrupt mode
* @param hcec: CEC handle
* @param DestinationAddress: destination logical address
* @param pData: pointer to input byte data buffer
* @param Size: amount of data to be sent in bytes (without counting the header).
* 0 means only the header is sent (ping operation).
* Maximum TX size is 15 bytes (1 opcode and up to 14 operands).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CEC_Transmit_IT(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size)
{
uint8_t temp = 0;
/* if the IP isn't already busy and if there is no previous transmission
already pending due to arbitration lost */
if (((hcec->State == HAL_CEC_STATE_READY) || (hcec->State == HAL_CEC_STATE_STANDBY_RX))
&& (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET))
{
if((pData == NULL ) && (Size > 0))
{
hcec->State = HAL_CEC_STATE_ERROR;
return HAL_ERROR;
}
assert_param(IS_CEC_ADDRESS(DestinationAddress));
assert_param(IS_CEC_MSGSIZE(Size));
/* Process Locked */
__HAL_LOCK(hcec);
hcec->pTxBuffPtr = pData;
hcec->State = HAL_CEC_STATE_BUSY_TX;
hcec->ErrorCode = HAL_CEC_ERROR_NONE;
/* Disable Peripheral to write CEC_IER register */
__HAL_CEC_DISABLE(hcec);
/* Enable the following two CEC Transmission interrupts as
* well as the following CEC Transmission Errors interrupts:
* 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_TXBR|CEC_IT_TXEND|CEC_IER_TX_ALL_ERR);
/* Enable the Peripheral */
__HAL_CEC_ENABLE(hcec);
/* initialize the number of bytes to send,
* 0 means only one header is sent (ping operation) */
hcec->TxXferCount = Size;
/* Process Unlocked */
__HAL_UNLOCK(hcec);
/* in case of no payload (Size = 0), sender is only pinging the system;
* Set TX End of Message (TXEOM) bit, must be set before writing data to TXDR */
if (Size == 0)
{
__HAL_CEC_LAST_BYTE_TX_SET(hcec);
}
/* send header block */
temp = ((uint32_t)hcec->Init.InitiatorAddress << CEC_INITIATOR_LSB_POS) | DestinationAddress;
hcec->Instance->TXDR = temp;
/* Set TX Start of Message (TXSOM) bit */
__HAL_CEC_FIRST_BYTE_TX_SET(hcec);
return HAL_OK;
}
/* if the IP is already busy or if there is a previous transmission
already pending due to arbitration loss */
else if ((hcec->State == HAL_CEC_STATE_BUSY_TX)
|| (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET))
{
__HAL_LOCK(hcec);
/* set state to BUSY TX, in case it wasn't set already (case
* of transmission new attempt after arbitration loss) */
if (hcec->State != HAL_CEC_STATE_BUSY_TX)
{
hcec->State = HAL_CEC_STATE_BUSY_TX;
}
/* if all data have been sent */
if(hcec->TxXferCount == 0)
{
/* Disable Peripheral to write CEC_IER register */
__HAL_CEC_DISABLE(hcec);
/* Disable the CEC Transmission Interrupts */
__HAL_CEC_DISABLE_IT(hcec, CEC_IT_TXBR|CEC_IT_TXEND);
/* Disable the CEC Transmission Error Interrupts */
__HAL_CEC_DISABLE_IT(hcec, CEC_IER_TX_ALL_ERR);
/* Enable the Peripheral */
__HAL_CEC_ENABLE(hcec);
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXBR|CEC_FLAG_TXEND);
hcec->State = HAL_CEC_STATE_READY;
/* Call the Process Unlocked before calling the Tx call back API to give the possibility to
start again the Transmission under the Tx call back API */
__HAL_UNLOCK(hcec);
HAL_CEC_TxCpltCallback(hcec);
return HAL_OK;
}
else
{
if (hcec->TxXferCount == 1)
{
/* if this is the last byte transmission, set TX End of Message (TXEOM) bit */
__HAL_CEC_LAST_BYTE_TX_SET(hcec);
}
/* clear Tx-Byte request flag */
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXBR);
hcec->Instance->TXDR = *hcec->pTxBuffPtr++;
hcec->TxXferCount--;
/* Process Unlocked */
__HAL_UNLOCK(hcec);
return HAL_OK;
}
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Send data in blocking mode
* @param hcec: CEC handle
* @param DestinationAddress: destination logical address
* @param pData: pointer to input byte data buffer
* @param Size: amount of data to be sent in bytes (without counting the header).
* 0 means only the header is sent (ping operation).
* Maximum TX size is 15 bytes (1 opcode and up to 14 operands).
* @param Timeout: Timeout duration.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CEC_Transmit(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size, uint32_t Timeout)
{
uint8_t temp = 0;
uint32_t tempisr = 0;
uint32_t tickstart = 0;
if((hcec->State == HAL_CEC_STATE_READY) && (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET))
{
hcec->ErrorCode = HAL_CEC_ERROR_NONE;
if((pData == NULL ) && (Size > 0))
{
hcec->State = HAL_CEC_STATE_ERROR;
return HAL_ERROR;
}
assert_param(IS_CEC_ADDRESS(DestinationAddress));
assert_param(IS_CEC_MSGSIZE(Size));
/* Process Locked */
__HAL_LOCK(hcec);
hcec->State = HAL_CEC_STATE_BUSY_TX;
hcec->TxXferCount = Size;
/* case no data to be sent, sender is only pinging the system */
if (Size == 0)
{
/* Set TX End of Message (TXEOM) bit, must be set before writing data to TXDR */
__HAL_CEC_LAST_BYTE_TX_SET(hcec);
}
/* send header block */
temp = ((uint32_t)hcec->Init.InitiatorAddress << CEC_INITIATOR_LSB_POS) | DestinationAddress;
hcec->Instance->TXDR = temp;
/* Set TX Start of Message (TXSOM) bit */
__HAL_CEC_FIRST_BYTE_TX_SET(hcec);
while (hcec->TxXferCount > 0)
{
hcec->TxXferCount--;
tickstart = HAL_GetTick();
while(HAL_IS_BIT_CLR(hcec->Instance->ISR, CEC_FLAG_TXBR))
{
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0) || ((HAL_GetTick() - tickstart) > Timeout))
{
hcec->State = HAL_CEC_STATE_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hcec);
return HAL_TIMEOUT;
}
}
/* check whether error occurred while waiting for TXBR to be set:
* has Tx underrun occurred ?
* has Tx error occurred ?
* has Tx Missing Acknowledge error occurred ?
* has Arbitration Loss error occurred ? */
tempisr = hcec->Instance->ISR;
if ((tempisr & (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST)) != 0)
{
/* copy ISR for error handling purposes */
hcec->ErrorCode = tempisr;
/* clear all error flags by default */
__HAL_CEC_CLEAR_FLAG(hcec, (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST));
hcec->State = HAL_CEC_STATE_ERROR;
__HAL_UNLOCK(hcec);
return HAL_ERROR;
}
}
/* TXBR to clear BEFORE writing TXDR register */
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXBR);
if (hcec->TxXferCount == 0)
{
/* if last byte transmission, set TX End of Message (TXEOM) bit */
__HAL_CEC_LAST_BYTE_TX_SET(hcec);
}
hcec->Instance->TXDR = *pData++;
/* error check after TX byte write up */
tempisr = hcec->Instance->ISR;
if ((tempisr & (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST)) != 0)
{
/* copy ISR for error handling purposes */
hcec->ErrorCode = tempisr;
/* clear all error flags by default */
__HAL_CEC_CLEAR_FLAG(hcec, (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST));
hcec->State = HAL_CEC_STATE_ERROR;
__HAL_UNLOCK(hcec);
return HAL_ERROR;
}
} /* end while (while (hcec->TxXferCount > 0)) */
/* if no error up to this point, check that transmission is
* complete, that is wait until TXEOM is reset */
tickstart = HAL_GetTick();
while (HAL_IS_BIT_SET(hcec->Instance->CR, CEC_CR_TXEOM))
{
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0) || ((HAL_GetTick() - tickstart) > Timeout))
{
hcec->State = HAL_CEC_STATE_ERROR;
__HAL_UNLOCK(hcec);
return HAL_TIMEOUT;
}
}
}
/* Final error check once all bytes have been transmitted */
tempisr = hcec->Instance->ISR;
if ((tempisr & (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE)) != 0)
{
/* copy ISR for error handling purposes */
hcec->ErrorCode = tempisr;
/* clear all error flags by default */
__HAL_CEC_CLEAR_FLAG(hcec, (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE));
hcec->State = HAL_CEC_STATE_ERROR;
__HAL_UNLOCK(hcec);
return HAL_ERROR;
}
hcec->State = HAL_CEC_STATE_READY;
__HAL_UNLOCK(hcec);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Send data in interrupt mode
* @param hcec: CEC handle.
* Function called under interruption only, once
* interruptions have been enabled by HAL_CEC_Transmit_IT()
* @retval HAL status
*/
static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec)
{
uint32_t tmp_state = 0;
tmp_state = hcec->State;
/* if the IP is already busy or if there is a previous transmission
already pending due to arbitration loss */
if(((tmp_state == HAL_CEC_STATE_BUSY_TX) || (tmp_state == HAL_CEC_STATE_BUSY_TX_RX))
|| (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET))
{
/* if all data have been sent */
if(hcec->TxXferCount == 0)
{
/* Acknowledge successful completion by writing 0x00 */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
/* Check if a receive process is ongoing or not */
if(hcec->State == HAL_CEC_STATE_BUSY_TX_RX)
{
/* Interrupts are not disabled due to reception still ongoing */
hcec->State = HAL_CEC_STATE_BUSY_RX;
}
else
{
/* Disable the CEC Transmission Interrupts */
__HAL_CEC_DISABLE_IT(hcec, CEC_IT_IE);
hcec->State = HAL_CEC_STATE_READY;
}
HAL_CEC_TxCpltCallback(hcec);
return HAL_OK;
}
else
{
/* Reduce the number of bytes to transfer by one */
hcec->TxXferCount--;
/* Write data to TX buffer*/
hcec->Instance->TXD = *hcec->pTxBuffPtr++;
/* If this is the last byte of the ongoing transmission */
if (hcec->TxXferCount == 0)
{
/* Acknowledge byte request and signal end of message */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM);
}
else
{
/* Acknowledge byte request by writing 0x00 */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
}
return HAL_OK;
}
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Send data in interrupt mode
* @param hcec: CEC handle
* @param DestinationAddress: destination logical address
* @param pData: pointer to input byte data buffer
* @param Size: amount of data to be sent in bytes (without counting the header).
* 0 means only the header is sent (ping operation).
* Maximum TX size is 15 bytes (1 opcode and up to 14 operands).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CEC_Transmit_IT(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size)
{
uint8_t temp = 0;
uint32_t tmp_state = 0;
tmp_state = hcec->State;
if(((tmp_state == HAL_CEC_STATE_READY) || (tmp_state == HAL_CEC_STATE_BUSY_RX))
&& (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET))
{
/* Basic check on pData pointer */
if(((pData == NULL) && (Size > 0)) || (! IS_CEC_MSGSIZE(Size)))
{
return HAL_ERROR;
}
assert_param(IS_CEC_ADDRESS(DestinationAddress));
/* Process Locked */
__HAL_LOCK(hcec);
hcec->pTxBuffPtr = pData;
/* Check if a receive process is ongoing or not */
if(hcec->State == HAL_CEC_STATE_BUSY_RX)
{
hcec->State = HAL_CEC_STATE_BUSY_TX_RX;
/* Interrupt are not enabled here because they are already enabled in the Reception process */
}
else
{
hcec->State = HAL_CEC_STATE_BUSY_TX;
/* Enable the CEC interrupt */
__HAL_CEC_ENABLE_IT(hcec, CEC_IT_IE);
}
hcec->ErrorCode = HAL_CEC_ERROR_NONE;
/* initialize the number of bytes to send,
* 0 means only one header is sent (ping operation) */
hcec->TxXferCount = Size;
/* send header block */
temp = (uint8_t)((uint32_t)(hcec->Init.InitiatorAddress) << CEC_INITIATOR_LSB_POS) | DestinationAddress;
hcec->Instance->TXD = temp;
/* Process Unlocked */
__HAL_UNLOCK(hcec);
/* case no data to be sent, sender is only pinging the system */
if (Size != 0)
{
/* Set TX Start of Message (TXSOM) bit */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TSOM);
}
else
{
/* Send a ping command */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM|CEC_FLAG_TSOM);
}
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Send data in blocking mode
* @param hcec: CEC handle
* @param DestinationAddress: destination logical address
* @param pData: pointer to input byte data buffer
* @param Size: amount of data to be sent in bytes (without counting the header).
* 0 means only the header is sent (ping operation).
* Maximum TX size is 15 bytes (1 opcode and up to 14 operands).
* @param Timeout: Timeout duration.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CEC_Transmit(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size, uint32_t Timeout)
{
uint8_t temp = 0;
uint32_t tickstart = 0;
/* If the IP is ready */
if((hcec->State == HAL_CEC_STATE_READY)
&& (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET))
{
/* Basic check on pData pointer */
if(((pData == NULL) && (Size > 0)) || (! IS_CEC_MSGSIZE(Size)))
{
return HAL_ERROR;
}
assert_param(IS_CEC_ADDRESS(DestinationAddress));
/* Process Locked */
__HAL_LOCK(hcec);
/* Enter the transmit mode */
hcec->State = HAL_CEC_STATE_BUSY_TX;
hcec->ErrorCode = HAL_CEC_ERROR_NONE;
/* Initialize the number of bytes to send,
* 0 means only one header is sent (ping operation) */
hcec->TxXferCount = Size;
/* Send header block */
temp = (uint8_t)((uint32_t)(hcec->Init.InitiatorAddress) << CEC_INITIATOR_LSB_POS) | DestinationAddress;
hcec->Instance->TXD = temp;
/* In case no data to be sent, sender is only pinging the system */
if (Size != 0)
{
/* Set TX Start of Message (TXSOM) bit */
hcec->Instance->CSR = CEC_FLAG_TSOM;
}
else
{
/* Send a ping command */
hcec->Instance->CSR = CEC_FLAG_TEOM|CEC_FLAG_TSOM;
}
/* Polling TBTRF bit with timeout handling*/
while (hcec->TxXferCount > 0)
{
/* Decreasing of the number of remaining data to receive */
hcec->TxXferCount--;
/* Timeout handling */
tickstart = HAL_GetTick();
/* Waiting for the next data transmission */
while(HAL_IS_BIT_CLR(hcec->Instance->CSR, CEC_FLAG_TBTRF))
{
/* Timeout handling */
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
{
hcec->State = HAL_CEC_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hcec);
return HAL_TIMEOUT;
}
}
/* Check if an error occured */
if(HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_TERR) || HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_RERR))
{
/* Copy ESR for error handling purposes */
hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
/* Acknowledgement of the error */
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
hcec->State = HAL_CEC_STATE_READY;
__HAL_UNLOCK(hcec);
return HAL_ERROR;
}
}
/* Write the next data to TX buffer */
hcec->Instance->TXD = *pData++;
/* If this is the last byte of the ongoing transmission */
if (hcec->TxXferCount == 0)
{
/* Acknowledge byte request and signal end of message */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM);
}
else
{
/* Acknowledge byte request by writing 0x00 */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
}
}
/* Timeout handling */
tickstart = HAL_GetTick();
/* Wait for message transmission completion (TBTRF is set) */
while (HAL_IS_BIT_CLR(hcec->Instance->CSR, CEC_FLAG_TBTRF))
{
/* Timeout handling */
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
{
hcec->State = HAL_CEC_STATE_READY;
__HAL_UNLOCK(hcec);
return HAL_TIMEOUT;
}
}
/* Check of error during transmission of the last byte */
if(HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_TERR) || HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_RERR))
{
/* Copy ESR for error handling purposes */
hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
/* Acknowledgement of the error */
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
hcec->State = HAL_CEC_STATE_READY;
__HAL_UNLOCK(hcec);
return HAL_ERROR;
}
}
/* Check of error after the last byte transmission */
if(HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_TERR) || HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_RERR))
{
/* Copy ESR for error handling purposes */
hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
/* Acknowledgement of the error */
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
hcec->State = HAL_CEC_STATE_READY;
__HAL_UNLOCK(hcec);
return HAL_ERROR;
}
/* Acknowledge successful completion by writing 0x00 */
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
hcec->State = HAL_CEC_STATE_READY;
__HAL_UNLOCK(hcec);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
