/**
* @brief DMA I2S communication error callback
* @param hdma: pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA module.
* @retval None
*/
static void I2SEx_TxRxDMAError(DMA_HandleTypeDef *hdma)
{
I2S_HandleTypeDef* hi2s = (I2S_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
/* Check if the SPI2S is disabled to edit CFG1 register */
if ((hi2s->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
{
/* Disable Rx and Tx DMA Request */
CLEAR_BIT(hi2s->Instance->CFG1, (SPI_CFG1_RXDMAEN | SPI_CFG1_TXDMAEN));
}
else
{
/* Disable SPI peripheral */
__HAL_I2S_DISABLE(hi2s);
/* Disable Rx and Tx DMA Request */
CLEAR_BIT(hi2s->Instance->CFG1, (SPI_CFG1_RXDMAEN | SPI_CFG1_TXDMAEN));
/* Enable SPI peripheral */
__HAL_I2S_ENABLE(hi2s);
}
hi2s->TxXferCount = 0U;
hi2s->RxXferCount = 0U;
hi2s->State= HAL_I2S_STATE_READY;
/* Set the error code and execute error callback*/
SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_DMA);
HAL_I2S_ErrorCallback(hi2s);
}
/**
* @brief Resumes the audio stream playing from the Media.
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_DMAResume(I2S_HandleTypeDef *hi2s)
{
/* Process Locked */
__HAL_LOCK(hi2s);
if(hi2s->State == HAL_I2S_STATE_BUSY_TX)
{
/* Enable the I2S DMA Tx request */
SET_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN);
}
else if(hi2s->State == HAL_I2S_STATE_BUSY_RX)
{
/* Enable the I2S DMA Rx request */
SET_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN);
}
/* If the I2S peripheral is still not enabled, enable it */
if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) == 0)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
/**
* @brief Receive an amount of data in non-blocking mode with Interrupt
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to the Receive data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @note It is recommended to use DMA for the I2S receiver to avoid de-synchronisation
* between Master and Slave otherwise the I2S interrupt should be optimized.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Receive_IT(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
uint32_t tmp1 = 0, tmp2 = 0;
if(hi2s->State == HAL_I2S_STATE_READY)
{
if((pData == NULL) || (Size == 0))
{
return HAL_ERROR;
}
hi2s->pRxBuffPtr = pData;
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
if((tmp1 == I2S_DATAFORMAT_24B)||\
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->RxXferSize = Size*2;
hi2s->RxXferCount = Size*2;
}
else
{
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->State = HAL_I2S_STATE_BUSY_RX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
/* Enable TXE and ERR interrupt */
__HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR));
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit an amount of data in non-blocking mode with Interrupt
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Transmit_IT(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
if((pData == NULL) || (Size == 0))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2s);
if(hi2s->State == HAL_I2S_STATE_READY)
{
hi2s->pTxBuffPtr = pData;
hi2s->State = HAL_I2S_STATE_BUSY_TX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = (Size << 1);
hi2s->TxXferCount = (Size << 1);
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
}
/* Enable TXE and ERR interrupt */
__HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR));
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_BUSY;
}
}
/**
* @brief Resumes the audio stream playing from the Media.
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @retval HAL status
*/
__weak HAL_StatusTypeDef HAL_I2S_DMAResume(I2S_HandleTypeDef *hi2s)
{
/* Process Locked */
__HAL_LOCK(hi2s);
if(hi2s->State == HAL_I2S_STATE_BUSY_TX)
{
/* Enable the I2S DMA Tx request */
hi2s->Instance->CR2 |= SPI_CR2_TXDMAEN;
}
else if(hi2s->State == HAL_I2S_STATE_BUSY_RX)
{
/* Enable the I2S DMA Rx request */
hi2s->Instance->CR2 |= SPI_CR2_RXDMAEN;
}
else if(hi2s->State == HAL_I2S_STATE_BUSY_TX_RX)
{
if((hi2s->Init.Mode == I2S_MODE_SLAVE_TX)||(hi2s->Init.Mode == I2S_MODE_MASTER_TX))
{
/* Enable the I2S DMA Tx request */
hi2s->Instance->CR2 |= SPI_CR2_TXDMAEN;
}
else
{
/* Enable the I2S DMA Rx request */
hi2s->Instance->CR2 |= SPI_CR2_RXDMAEN;
}
}
/* If the I2S peripheral is still not enabled, enable it */
if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) == 0)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
/**
* @brief DMA I2S transmit receive process complete callback
* @param hdma: pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA module.
* @retval None
*/
static void I2SEx_DMATxRxCplt(DMA_HandleTypeDef *hdma)
{
I2S_HandleTypeDef* hi2s = (I2S_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
if(((((DMA_Stream_TypeDef *)hdma->Instance)->CR) & DMA_SxCR_CIRC) == 0U)
{
/* Check if the SPI2S is disabled to edit CFG1 register */
if ((hi2s->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
{
/* Disable Tx/Rx DMA Request */
CLEAR_BIT(hi2s->Instance->CFG1, SPI_CFG1_RXDMAEN | SPI_CFG1_TXDMAEN);
}
else
{
/* Disable SPI peripheral */
__HAL_I2S_DISABLE(hi2s);
/* Disable Rx DMA Request */
CLEAR_BIT(hi2s->Instance->CFG1, SPI_CFG1_RXDMAEN | SPI_CFG1_TXDMAEN);
/* Enable SPI peripheral */
__HAL_I2S_ENABLE(hi2s);
}
hi2s->TxXferCount = 0U;
hi2s->RxXferCount = 0U;
hi2s->State = HAL_I2S_STATE_READY;
if (hi2s->ErrorCode != HAL_I2S_ERROR_NONE)
{
HAL_I2S_ErrorCallback(hi2s);
return;
}
}
HAL_I2SEx_TxRxCpltCallback(hi2s);
}
/**
* @brief Transmit an amount of data in non-blocking mode with DMA
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to the Transmit data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Transmit_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
uint32_t *tmp;
uint32_t tmp1 = 0, tmp2 = 0;
if((pData == NULL) || (Size == 0))
{
return HAL_ERROR;
}
if(hi2s->State == HAL_I2S_STATE_READY)
{
hi2s->pTxBuffPtr = pData;
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
if((tmp1 == I2S_DATAFORMAT_24B)|| \
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = Size*2;
hi2s->TxXferCount = Size*2;
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->State = HAL_I2S_STATE_BUSY_TX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
/* Set the I2S Tx DMA Half transfer complete callback */
hi2s->hdmatx->XferHalfCpltCallback = I2S_DMATxHalfCplt;
/* Set the I2S Tx DMA transfer complete callback */
hi2s->hdmatx->XferCpltCallback = I2S_DMATxCplt;
/* Set the DMA error callback */
hi2s->hdmatx->XferErrorCallback = I2S_DMAError;
/* Enable the Tx DMA Stream */
tmp = (uint32_t*)&pData;
HAL_DMA_Start_IT(hi2s->hdmatx, *(uint32_t*)tmp, (uint32_t)&hi2s->Instance->DR, hi2s->TxXferSize);
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Check if the I2S Tx request is already enabled */
if((hi2s->Instance->CR2 & SPI_CR2_TXDMAEN) != SPI_CR2_TXDMAEN)
{
/* Enable Tx DMA Request */
hi2s->Instance->CR2 |= SPI_CR2_TXDMAEN;
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Full-Duplex Transmit/Receive data in non-blocking mode using DMA
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pTxData: a 16-bit pointer to the Transmit data buffer.
* @param pRxData: a 16-bit pointer to the Receive data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2SEx_TransmitReceive_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pTxData, uint16_t *pRxData, uint16_t Size)
{
uint32_t *tmp;
uint32_t tmp1 = 0, tmp2 = 0;
if((pTxData == NULL ) || (pRxData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
if(hi2s->State == HAL_I2S_STATE_READY)
{
hi2s->pTxBuffPtr = pTxData;
hi2s->pRxBuffPtr = pRxData;
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
/* Check the Data format: When a 16-bit data frame or a 16-bit data frame extended
is selected during the I2S configuration phase, the Size parameter means the number
of 16-bit data length in the transaction and when a 24-bit data frame or a 32-bit data
frame is selected the Size parameter means the number of 16-bit data length. */
if((tmp1 == I2S_DATAFORMAT_24B)||\
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = Size*2;
hi2s->TxXferCount = Size*2;
hi2s->RxXferSize = Size*2;
hi2s->RxXferCount = Size*2;
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->State = HAL_I2S_STATE_BUSY_TX_RX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
/* Set the I2S Rx DMA Half transfert complete callback */
hi2s->hdmarx->XferHalfCpltCallback = I2S_DMARxHalfCplt;
/* Set the I2S Rx DMA transfert complete callback */
hi2s->hdmarx->XferCpltCallback = I2S_DMARxCplt;
/* Set the I2S Rx DMA error callback */
hi2s->hdmarx->XferErrorCallback = I2S_DMAError;
/* Set the I2S Tx DMA Half transfert complete callback */
hi2s->hdmatx->XferHalfCpltCallback = I2S_DMATxHalfCplt;
/* Set the I2S Tx DMA transfert complete callback */
hi2s->hdmatx->XferCpltCallback = I2S_DMATxCplt;
/* Set the I2S Tx DMA error callback */
hi2s->hdmatx->XferErrorCallback = I2S_DMAError;
tmp1 = hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG;
tmp2 = hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG;
/* Check if the I2S_MODE_MASTER_TX or I2S_MODE_SLAVE_TX Mode is selected */
if((tmp1 == I2S_MODE_MASTER_TX) || (tmp2 == I2S_MODE_SLAVE_TX))
{
/* Enable the Rx DMA Stream */
tmp = (uint32_t*)&pRxData;
HAL_DMA_Start_IT(hi2s->hdmarx, (uint32_t)&I2SxEXT(hi2s->Instance)->DR, *(uint32_t*)tmp, hi2s->RxXferSize);
/* Enable Rx DMA Request */
I2SxEXT(hi2s->Instance)->CR2 |= SPI_CR2_RXDMAEN;
/* Enable the Tx DMA Stream */
tmp = (uint32_t*)&pTxData;
HAL_DMA_Start_IT(hi2s->hdmatx, *(uint32_t*)tmp, (uint32_t)&hi2s->Instance->DR, hi2s->TxXferSize);
/* Enable Tx DMA Request */
hi2s->Instance->CR2 |= SPI_CR2_TXDMAEN;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2Sext(receiver) before enabling I2Sx peripheral */
I2SxEXT(hi2s->Instance)->I2SCFGR |= SPI_I2SCFGR_I2SE;
/* Enable I2S peripheral after the I2Sext */
__HAL_I2S_ENABLE(hi2s);
}
}
else
{
/* Enable the Tx DMA Stream */
tmp = (uint32_t*)&pTxData;
HAL_DMA_Start_IT(hi2s->hdmatx, *(uint32_t*)tmp, (uint32_t)&I2SxEXT(hi2s->Instance)->DR, hi2s->TxXferSize);
/* Enable Tx DMA Request */
I2SxEXT(hi2s->Instance)->CR2 |= SPI_CR2_TXDMAEN;
/* Enable the Rx DMA Stream */
tmp = (uint32_t*)&pRxData;
HAL_DMA_Start_IT(hi2s->hdmarx, (uint32_t)&hi2s->Instance->DR, *(uint32_t*)tmp, hi2s->RxXferSize);
/* Enable Rx DMA Request */
hi2s->Instance->CR2 |= SPI_CR2_RXDMAEN;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral before the I2Sext */
__HAL_I2S_ENABLE(hi2s);
/* Enable I2Sext(transmitter) after enabling I2Sx peripheral */
I2SxEXT(hi2s->Instance)->I2SCFGR |= SPI_I2SCFGR_I2SE;
}
else
{
/* Check if Master Receiver mode is selected */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
{
/* Clear the Overrun Flag by a read operation on the SPI_DR register followed by a read
access to the SPI_SR register. */
__HAL_I2S_CLEAR_OVRFLAG(hi2s);
}
}
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive an amount of data in blocking mode
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @note In I2S Master Receiver mode, just after enabling the peripheral the clock will be generate
* in continuous way and as the I2S is not disabled at the end of the I2S transaction.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Receive(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tmp1 = 0, tmp2 = 0;
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
if(hi2s->State == HAL_I2S_STATE_READY)
{
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
if((tmp1 == I2S_DATAFORMAT_24B)|| \
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->RxXferSize = Size*2;
hi2s->RxXferCount = Size*2;
}
else
{
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->State = HAL_I2S_STATE_BUSY_RX;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Check if Master Receiver mode is selected */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
{
/* Clear the Overrun Flag by a read operation on the SPI_DR register followed by a read
access to the SPI_SR register. */
__HAL_I2S_CLEAR_OVRFLAG(hi2s);
}
/* Receive data */
while(hi2s->RxXferCount > 0)
{
/* Wait until RXNE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_RXNE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
(*pData++) = hi2s->Instance->DR;
hi2s->RxXferCount--;
}
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit an amount of data in blocking mode
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Transmit(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tmp1 = 0, tmp2 = 0;
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
if(hi2s->State == HAL_I2S_STATE_READY)
{
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
if((tmp1 == I2S_DATAFORMAT_24B)|| \
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = Size*2;
hi2s->TxXferCount = Size*2;
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->State = HAL_I2S_STATE_BUSY_TX;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
while(hi2s->TxXferCount > 0)
{
hi2s->Instance->DR = (*pData++);
hi2s->TxXferCount--;
/* Wait until TXE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
}
/* Wait until Busy flag is reset */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_BSY, SET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit an amount of data in blocking mode
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Transmit(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
if(hi2s->State == HAL_I2S_STATE_READY)
{
if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = (Size << 1);
hi2s->TxXferCount = (Size << 1);
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
hi2s->State = HAL_I2S_STATE_BUSY_TX;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
while(hi2s->TxXferCount > 0)
{
hi2s->Instance->DR = (*pData++);
hi2s->TxXferCount--;
/* Wait until TXE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, SET, Timeout) != HAL_OK)
{
/* Set the error code and execute error callback*/
hi2s->ErrorCode |= HAL_I2S_ERROR_TIMEOUT;
HAL_I2S_ErrorCallback(hi2s);
return HAL_TIMEOUT;
}
/* Check if an underrun occurs */
if(__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_UDR) == SET)
{
/* Set the I2S State ready */
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
/* Set the error code and execute error callback*/
hi2s->ErrorCode |= HAL_I2S_ERROR_UDR;
HAL_I2S_ErrorCallback(hi2s);
return HAL_ERROR;
}
}
/* Wait until Busy flag is reset */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_BSY, RESET, Timeout) != HAL_OK)
{
/* Set the error code and execute error callback*/
hi2s->ErrorCode |= HAL_I2S_ERROR_TIMEOUT;
HAL_I2S_ErrorCallback(hi2s);
return HAL_TIMEOUT;
}
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit and Receive an amount of data in non-blocking mode with DMA
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pTxData: a 16-bit pointer to the Transmit data buffer.
* @param pRxData: a 16-bit pointer to the Receive data buffer.
* @param Size: number of frames to be sent.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2SEx_TransmitReceive_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pTxData, uint16_t *pRxData, uint16_t Size)
{
/* Check Mode parameter */
assert_param(IS_I2S_FD_MODE(hi2s->Init.Mode));
if((pTxData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2s);
if(hi2s->State == HAL_I2S_STATE_READY)
{
hi2s->pTxBuffPtr = pTxData;
hi2s->pRxBuffPtr = pRxData;
hi2s->State = HAL_I2S_STATE_BUSY_TX_RX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = (Size << 1U);
hi2s->TxXferCount = (Size << 1U);
hi2s->RxXferSize = (Size << 1U);
hi2s->RxXferCount = (Size << 1U);
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Set the I2S Rx DMA Half transfert complete callback */
hi2s->hdmarx->XferHalfCpltCallback = I2SEx_DMATxRxHalfCplt;
/* Set the I2S Rx DMA transfert complete callback */
hi2s->hdmarx->XferCpltCallback = I2SEx_DMATxRxCplt;
/* Set the DMA error callback */
hi2s->hdmarx->XferErrorCallback = I2SEx_TxRxDMAError;
/* Enable the Rx DMA Channel */
HAL_DMA_Start_IT(hi2s->hdmarx, (uint32_t)&hi2s->Instance->RXDR, (uint32_t)hi2s->pRxBuffPtr, hi2s->RxXferSize);
/* Check if the I2S Rx requests are already enabled */
if(HAL_IS_BIT_CLR(hi2s->Instance->CFG1, SPI_CFG1_RXDMAEN))
{
/* Check if the SPI2S is disabled to edit CFG1 register */
if ((hi2s->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
{
/* Enable Rx DMA Request */
SET_BIT(hi2s->Instance->CFG1, SPI_CFG1_RXDMAEN);
}
else
{
/* Disable SPI peripheral */
__HAL_I2S_DISABLE(hi2s);
/* Enable Rx DMA Request */
SET_BIT(hi2s->Instance->CFG1, SPI_CFG1_RXDMAEN);
/* Enable SPI peripheral */
__HAL_I2S_ENABLE(hi2s);
}
}
/* Set the I2S Tx DMA transfer callbacks as NULL because the communication closing
is performed in DMA reception callbacks */
hi2s->hdmatx->XferHalfCpltCallback = NULL;
hi2s->hdmatx->XferCpltCallback = NULL;
hi2s->hdmatx->XferErrorCallback = NULL;
/* Enable the Tx DMA Channel */
HAL_DMA_Start_IT(hi2s->hdmatx, (uint32_t)hi2s->pTxBuffPtr, (uint32_t)&hi2s->Instance->TXDR, hi2s->TxXferSize);
/* Check if the I2S Tx requests are already enabled */
if(HAL_IS_BIT_CLR(hi2s->Instance->CFG1, SPI_CFG1_TXDMAEN))
{
/* Check if the SPI2S is disabled to edit CFG1 register */
if ((hi2s->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
{
/* Enable Tx DMA Request */
SET_BIT(hi2s->Instance->CFG1, SPI_CFG1_TXDMAEN);
}
else
{
/* Disable SPI peripheral */
__HAL_I2S_DISABLE(hi2s);
/* Enable Tx/Rx DMA Request */
SET_BIT(hi2s->Instance->CFG1, SPI_CFG1_TXDMAEN);
/* Enable SPI peripheral */
__HAL_I2S_ENABLE(hi2s);
}
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_BUSY;
}
}
/**
* @brief Full-Duplex Transmit/Receive data in non-blocking mode using Interrupt
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pTxData: a 16-bit pointer to the Transmit data buffer.
* @param pRxData: a 16-bit pointer to the Receive data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2SEx_TransmitReceive_IT(I2S_HandleTypeDef *hi2s, uint16_t *pTxData, uint16_t *pRxData, uint16_t Size)
{
uint32_t tmp1 = 0, tmp2 = 0;
if(hi2s->State == HAL_I2S_STATE_READY)
{
if((pTxData == NULL ) || (pRxData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
hi2s->pTxBuffPtr = pTxData;
hi2s->pRxBuffPtr = pRxData;
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
/* Check the Data format: When a 16-bit data frame or a 16-bit data frame extended
is selected during the I2S configuration phase, the Size parameter means the number
of 16-bit data length in the transaction and when a 24-bit data frame or a 32-bit data
frame is selected the Size parameter means the number of 16-bit data length. */
if((tmp1 == I2S_DATAFORMAT_24B)||\
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = Size*2;
hi2s->TxXferCount = Size*2;
hi2s->RxXferSize = Size*2;
hi2s->RxXferCount = Size*2;
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->State = HAL_I2S_STATE_BUSY_TX_RX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
tmp1 = hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG;
tmp2 = hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG;
/* Check if the I2S_MODE_MASTER_TX or I2S_MODE_SLAVE_TX Mode is selected */
if((tmp1 == I2S_MODE_MASTER_TX) || (tmp2 == I2S_MODE_SLAVE_TX))
{
/* Enable I2Sext RXNE and ERR interrupts */
I2SxEXT(hi2s->Instance)->CR2 |= (I2S_IT_RXNE | I2S_IT_ERR);
/* Enable I2Sx TXE and ERR interrupts */
__HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR));
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2Sext(receiver) before enabling I2Sx peripheral */
I2SxEXT(hi2s->Instance)->I2SCFGR |= SPI_I2SCFGR_I2SE;
/* Enable I2Sx peripheral */
__HAL_I2S_ENABLE(hi2s);
}
}
/* The I2S_MODE_MASTER_RX or I2S_MODE_SLAVE_RX Mode is selected */
else
{
/* Enable I2Sext TXE and ERR interrupts */
I2SxEXT(hi2s->Instance)->CR2 |= (I2S_IT_TXE |I2S_IT_ERR);
/* Enable I2Sext RXNE and ERR interrupts */
__HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR));
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Check if the I2S_MODE_MASTER_RX is selected */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
{
/* Prepare the First Data before enabling the I2S */
if(hi2s->TxXferCount != 0)
{
/* Transmit First data */
I2SxEXT(hi2s->Instance)->DR = (*hi2s->pTxBuffPtr++);
hi2s->TxXferCount--;
if(hi2s->TxXferCount == 0)
{
/* Disable I2Sext TXE interrupt */
I2SxEXT(hi2s->Instance)->CR2 &= ~I2S_IT_TXE;
}
}
}
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
/* Enable I2Sext(transmitter) after enabling I2Sx peripheral */
I2SxEXT(hi2s->Instance)->I2SCFGR |= SPI_I2SCFGR_I2SE;
}
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit and Receive an amount of data in non-blocking mode with Interrupt
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pTxData: a 16-bit pointer to the Transmit data buffer.
* @param pRxData: a 16-bit pointer to the Receive data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @note This function can use an Audio Frequency up to 48KHz when I2S Clock Source is 32MHz
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2SEx_TransmitReceive_IT(I2S_HandleTypeDef *hi2s, uint16_t *pTxData, uint16_t *pRxData, uint16_t Size)
{
/* Check Mode parameter */
assert_param(IS_I2S_FD_MODE(hi2s->Init.Mode));
/* Process Locked */
__HAL_LOCK(hi2s);
if((pTxData == NULL) || (pRxData == NULL) || (Size == 0U))
{
__HAL_UNLOCK(hi2s);
return HAL_ERROR;
}
if (hi2s->State == HAL_I2S_STATE_READY)
{
__HAL_UNLOCK(hi2s);
return HAL_BUSY;
}
/* Set the transaction information */
hi2s->State = HAL_I2S_STATE_BUSY_TX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
hi2s->pTxBuffPtr = pTxData;
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
/* Init field not used in handle to zero */
hi2s->pRxBuffPtr = pRxData;
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
/* Set the function for IT treatment */
if (hi2s->Init.DataFormat > I2S_DATAFORMAT_16B)
{
hi2s->RxISR = I2SEx_2linesRxISR_32BIT;
hi2s->TxISR = I2SEx_2linesTxISR_32BIT;
}
else
{
hi2s->RxISR = I2SEx_2linesRxISR_16BIT;
hi2s->TxISR = I2SEx_2linesTxISR_16BIT;
}
/* Check if the I2S is already enabled */
if ((hi2s->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
{
/* Enable SPI peripheral */
__HAL_I2S_ENABLE(hi2s);
}
if (IS_I2S_MASTER(hi2s->Init.Mode))
{
/* Master transfer start */
SET_BIT(hi2s->Instance->CR1, SPI_CR1_CSTART);
}
/* Enable TXE and ERR interrupt */
__HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_RXNE | I2S_IT_ERR));
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
/**
* @brief Receive an amount of data in non-blocking mode with DMA
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to the Receive data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Receive_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
uint32_t *tmp;
uint32_t tmp1 = 0, tmp2 = 0;
if((pData == NULL) || (Size == 0))
{
return HAL_ERROR;
}
if(hi2s->State == HAL_I2S_STATE_READY)
{
hi2s->pRxBuffPtr = pData;
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
if((tmp1 == I2S_DATAFORMAT_24B)|| \
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->RxXferSize = Size*2;
hi2s->RxXferCount = Size*2;
}
else
{
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->State = HAL_I2S_STATE_BUSY_RX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
/* Set the I2S Rx DMA Half transfer complete callback */
hi2s->hdmarx->XferHalfCpltCallback = I2S_DMARxHalfCplt;
/* Set the I2S Rx DMA transfer complete callback */
hi2s->hdmarx->XferCpltCallback = I2S_DMARxCplt;
/* Set the DMA error callback */
hi2s->hdmarx->XferErrorCallback = I2S_DMAError;
/* Check if Master Receiver mode is selected */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
{
/* Clear the Overrun Flag by a read operation to the SPI_DR register followed by a read
access to the SPI_SR register. */
__HAL_I2S_CLEAR_OVRFLAG(hi2s);
}
/* Enable the Rx DMA Stream */
tmp = (uint32_t*)&pData;
HAL_DMA_Start_IT(hi2s->hdmarx, (uint32_t)&hi2s->Instance->DR, *(uint32_t*)tmp, hi2s->RxXferSize);
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Check if the I2S Rx request is already enabled */
if((hi2s->Instance->CR2 &SPI_CR2_RXDMAEN) != SPI_CR2_RXDMAEN)
{
/* Enable Rx DMA Request */
hi2s->Instance->CR2 |= SPI_CR2_RXDMAEN;
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive an amount of data in blocking mode
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @note In I2S Master Receiver mode, just after enabling the peripheral the clock will be generate
* in continouse way and as the I2S is not disabled at the end of the I2S transaction.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Receive(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
if(hi2s->State == HAL_I2S_STATE_READY)
{
if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
hi2s->RxXferSize = (Size << 1);
hi2s->RxXferCount = (Size << 1);
}
else
{
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
hi2s->State = HAL_I2S_STATE_BUSY_RX;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Check if Master Receiver mode is selected */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
{
/* Clear the Overrun Flag by a read operation on the SPI_DR register followed by a read
access to the SPI_SR register. */
__HAL_I2S_CLEAR_OVRFLAG(hi2s);
}
/* Receive data */
while(hi2s->RxXferCount > 0)
{
/* Wait until RXNE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_RXNE, SET, Timeout) != HAL_OK)
{
/* Set the error code and execute error callback*/
hi2s->ErrorCode |= HAL_I2S_ERROR_TIMEOUT;
HAL_I2S_ErrorCallback(hi2s);
return HAL_TIMEOUT;
}
/* Check if an overrun occurs */
if(__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_OVR) == SET)
{
/* Set the I2S State ready */
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
/* Set the error code and execute error callback*/
hi2s->ErrorCode |= HAL_I2S_ERROR_OVR;
HAL_I2S_ErrorCallback(hi2s);
return HAL_ERROR;
}
(*pData++) = hi2s->Instance->DR;
hi2s->RxXferCount--;
}
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive an amount of data in blocking mode
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @note In I2S Master Receiver mode, just after enabling the peripheral the clock will be generate
* in continouse way and as the I2S is not disabled at the end of the I2S transaction.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Receive(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2s);
if(hi2s->State == HAL_I2S_STATE_READY)
{
if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
hi2s->RxXferSize = (Size << 1);
hi2s->RxXferCount = (Size << 1);
}
else
{
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Set state and reset error code */
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
hi2s->State = HAL_I2S_STATE_BUSY_RX;
hi2s->pRxBuffPtr = pData;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Receive data */
while(hi2s->RxXferCount > 0)
{
/* Wait until RXNE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_RXNE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
(*hi2s->pRxBuffPtr++) = hi2s->Instance->DR;
hi2s->RxXferCount--;
}
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_BUSY;
}
}
/**
* @brief Transmit an amount of data in blocking mode
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Transmit(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2s);
if(hi2s->State == HAL_I2S_STATE_READY)
{
if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = (Size << 1);
hi2s->TxXferCount = (Size << 1);
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
}
/* Set state and reset error code */
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
hi2s->State = HAL_I2S_STATE_BUSY_TX;
hi2s->pTxBuffPtr = pData;
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
while(hi2s->TxXferCount > 0)
{
/* Wait until TXE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
hi2s->Instance->DR = (*hi2s->pTxBuffPtr++);
hi2s->TxXferCount--;
}
/* Wait until TXE flag is set, to confirm the end of the transcation */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
/* Check if Slave mode is selected */
if(((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_SLAVE_TX) || ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_SLAVE_RX))
{
/* Wait until Busy flag is reset */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_BSY, SET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
}
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_BUSY;
}
}
/**
* @brief Transmit an amount of data in non-blocking mode with DMA
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pData: a 16-bit pointer to the Transmit data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2S_Transmit_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
if((pData == NULL) || (Size == 0))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2s);
if(hi2s->State == HAL_I2S_STATE_READY)
{
hi2s->pTxBuffPtr = pData;
hi2s->State = HAL_I2S_STATE_BUSY_TX;
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = (Size << 1);
hi2s->TxXferCount = (Size << 1);
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
}
/* Set the I2S Tx DMA Half transfert complete callback */
hi2s->hdmatx->XferHalfCpltCallback = I2S_DMATxHalfCplt;
/* Set the I2S Tx DMA transfert complete callback */
hi2s->hdmatx->XferCpltCallback = I2S_DMATxCplt;
/* Set the DMA error callback */
hi2s->hdmatx->XferErrorCallback = I2S_DMAError;
/* Enable the Tx DMA Channel */
HAL_DMA_Start_IT(hi2s->hdmatx, (uint32_t)hi2s->pTxBuffPtr, (uint32_t)&hi2s->Instance->DR, hi2s->TxXferSize);
/* Check if the I2S is already enabled */
if(HAL_IS_BIT_CLR(hi2s->Instance->I2SCFGR, SPI_I2SCFGR_I2SE))
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
/* Check if the I2S Tx request is already enabled */
if(HAL_IS_BIT_CLR(hi2s->Instance->CR2, SPI_CR2_TXDMAEN))
{
/* Enable Tx DMA Request */
SET_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN);
}
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_BUSY;
}
}
/**
* @brief Transmit and Receive an amount of data in blocking mode
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pTxData: a 16-bit pointer to the Transmit data buffer
* @param pRxData: a 16-bit pointer to the Receive data buffer
* @param Size: number of frames to be sent
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @note This function can use an Audio Frequency up to 48KHz when I2S Clock Source is 32MHz
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2SEx_TransmitReceive(I2S_HandleTypeDef *hi2s, uint16_t *pTxData, uint16_t *pRxData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0U;
uint32_t isDataFormat16B = 2U;
/* Check Mode parameter */
assert_param(IS_I2S_FD_MODE(hi2s->Init.Mode));
if((pTxData == NULL ) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2s);
/* Init tickstart for timeout management*/
tickstart = HAL_GetTick();
if(hi2s->State == HAL_I2S_STATE_READY)
{
/* Check the Data Format value */
if (((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B) ||
((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B))
{
isDataFormat16B = 0U;
}
else
{
isDataFormat16B = 1U;
}
if(!isDataFormat16B)
{
hi2s->TxXferSize = (Size << 1U);
hi2s->TxXferCount = (Size << 1U);
hi2s->RxXferSize = (Size << 1U);
hi2s->RxXferCount = (Size << 1U);
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Set state and reset error code */
hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
hi2s->State = HAL_I2S_STATE_BUSY_TX_RX;
hi2s->pTxBuffPtr = pTxData;
hi2s->pRxBuffPtr = pRxData;
/* Check if the SPI2S is already enabled */
if((hi2s->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
{
/* Enable I2S peripheral */
__HAL_I2S_ENABLE(hi2s);
}
if(IS_I2S_MASTER(hi2s->Init.Mode))
{
hi2s->Instance->CR1 |= SPI_CR1_CSTART;
}
/* Transmit and Receive data in 32 Bit mode */
if (!isDataFormat16B)
{
while ((hi2s->TxXferCount > 0U) || (hi2s->RxXferCount > 0U))
{
/* Check TXE flag */
if ((hi2s->TxXferCount > 0U) && (__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_TXE)))
{
*((__IO uint32_t *)&hi2s->Instance->TXDR) = *((uint32_t *)hi2s->pTxBuffPtr);
hi2s->pTxBuffPtr += sizeof(uint32_t);
hi2s->TxXferCount --;
}
/* Check RXNE flag */
if ((hi2s->RxXferCount > 0U) && (__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_RXNE)))
{
*((uint32_t *)hi2s->pRxBuffPtr) = *((__IO uint32_t *)&hi2s->Instance->RXDR);
hi2s->pRxBuffPtr += sizeof(uint32_t);
hi2s->RxXferCount --;
}
/* Timeout Management */
if ((Timeout != HAL_MAX_DELAY) && ((HAL_GetTick() - tickstart) >= Timeout))
{
/* Set the error code and execute error callback*/
SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_TIMEOUT);
HAL_I2S_ErrorCallback(hi2s);
/* Set the I2S State ready */
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_ERROR;
}
}
}
/* Transmit and Receive data in 16 Bit mode */
else
{
while ((hi2s->TxXferCount > 0U) || (hi2s->RxXferCount > 0U))
{
/* Check TXE flag */
if ((hi2s->TxXferCount > 0U) && (__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_TXE)))
{
if ( (hi2s->TxXferCount > 1U) && (hi2s->Init.FifoThreshold > SPI_FIFO_THRESHOLD_01DATA))
{
*((__IO uint32_t *)&hi2s->Instance->TXDR) = *((uint32_t *)hi2s->pTxBuffPtr);
hi2s->pTxBuffPtr += sizeof(uint32_t);
hi2s->TxXferCount-=2;
}
else
{
*((__IO uint16_t *)&hi2s->Instance->TXDR) = *((uint16_t *)hi2s->pTxBuffPtr);
hi2s->pTxBuffPtr += sizeof(uint16_t);
hi2s->TxXferCount--;
}
}
/* Check RXNE flag */
if ((hi2s->RxXferCount > 0U) && (__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_RXNE)))
{
if (hi2s->Instance->SR & I2S_FLAG_RXWNE)
{
*((uint32_t *)hi2s->pRxBuffPtr) = *((__IO uint32_t *)&hi2s->Instance->RXDR);
hi2s->pRxBuffPtr += sizeof(uint32_t);
hi2s->RxXferCount-=2;
}
else
{
*((uint16_t *)hi2s->pRxBuffPtr) = *((__IO uint16_t *)&hi2s->Instance->RXDR);
hi2s->pRxBuffPtr += sizeof(uint16_t);
hi2s->RxXferCount--;
}
}
/* Timeout Management */
if ((Timeout != HAL_MAX_DELAY) && ((HAL_GetTick() - tickstart) >= Timeout))
{
/* Set the error code and execute error callback*/
SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_TIMEOUT);
HAL_I2S_ErrorCallback(hi2s);
/* Set the I2S State ready */
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_ERROR;
}
}
}
/* Wait until TXE flag is set, to confirm the end of the transaction */
if (I2SEx_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_BUSY;
}
}
/**
* @brief Full-Duplex Transmit/Receive data in blocking mode.
* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
* the configuration information for I2S module
* @param pTxData: a 16-bit pointer to the Transmit data buffer.
* @param pRxData: a 16-bit pointer to the Receive data buffer.
* @param Size: number of data sample to be sent:
* @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S
* configuration phase, the Size parameter means the number of 16-bit data length
* in the transaction and when a 24-bit data frame or a 32-bit data frame is selected
* the Size parameter means the number of 16-bit data length.
* @param Timeout: Timeout duration
* @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization
* between Master and Slave(example: audio streaming).
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2SEx_TransmitReceive(I2S_HandleTypeDef *hi2s, uint16_t *pTxData, uint16_t *pRxData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0;
uint32_t tmp1 = 0, tmp2 = 0;
if((pTxData == NULL ) || (pRxData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
/* Check the I2S State */
if(hi2s->State == HAL_I2S_STATE_READY)
{
tmp1 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
tmp2 = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
/* Check the Data format: When a 16-bit data frame or a 16-bit data frame extended
is selected during the I2S configuration phase, the Size parameter means the number
of 16-bit data length in the transaction and when a 24-bit data frame or a 32-bit data
frame is selected the Size parameter means the number of 16-bit data length. */
if((tmp1 == I2S_DATAFORMAT_24B)|| \
(tmp2 == I2S_DATAFORMAT_32B))
{
hi2s->TxXferSize = Size*2;
hi2s->TxXferCount = Size*2;
hi2s->RxXferSize = Size*2;
hi2s->RxXferCount = Size*2;
}
else
{
hi2s->TxXferSize = Size;
hi2s->TxXferCount = Size;
hi2s->RxXferSize = Size;
hi2s->RxXferCount = Size;
}
/* Process Locked */
__HAL_LOCK(hi2s);
/* Set the I2S State busy TX/RX */
hi2s->State = HAL_I2S_STATE_BUSY_TX_RX;
tmp1 = hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG;
tmp2 = hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG;
/* Check if the I2S_MODE_MASTER_TX or I2S_MODE_SLAVE_TX Mode is selected */
if((tmp1 == I2S_MODE_MASTER_TX) || (tmp2 == I2S_MODE_SLAVE_TX))
{
/* Check if the I2S is already enabled: The I2S is kept enabled at the end of transaction
to avoid the clock de-synchronization between Master and Slave. */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2Sext(receiver) before enabling I2Sx peripheral */
I2SxEXT(hi2s->Instance)->I2SCFGR |= SPI_I2SCFGR_I2SE;
/* Enable I2Sx peripheral */
__HAL_I2S_ENABLE(hi2s);
}
while(hi2s->TxXferCount > 0)
{
/* Wait until TXE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
hi2s->Instance->DR = (*pTxData++);
/* Get tick */
tickstart = HAL_GetTick();
/* Wait until RXNE flag is set */
while((I2SxEXT(hi2s->Instance)->SR & SPI_SR_RXNE) != SPI_SR_RXNE)
{
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_TIMEOUT;
}
}
}
(*pRxData++) = I2SxEXT(hi2s->Instance)->DR;
hi2s->TxXferCount--;
hi2s->RxXferCount--;
}
}
/* The I2S_MODE_MASTER_RX or I2S_MODE_SLAVE_RX Mode is selected */
else
{
/* Check if the I2S is already enabled */
if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
{
/* Enable I2S peripheral before the I2Sext*/
__HAL_I2S_ENABLE(hi2s);
/* Enable I2Sext(transmitter) after enabling I2Sx peripheral */
I2SxEXT(hi2s->Instance)->I2SCFGR |= SPI_I2SCFGR_I2SE;
}
else
{
/* Check if Master Receiver mode is selected */
if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
{
/* Clear the Overrun Flag by a read operation on the SPI_DR register followed by a read
access to the SPI_SR register. */
__HAL_I2S_CLEAR_OVRFLAG(hi2s);
}
}
while(hi2s->TxXferCount > 0)
{
/* Get tick */
tickstart = HAL_GetTick();
/* Wait until TXE flag is set */
while((I2SxEXT(hi2s->Instance)->SR & SPI_SR_TXE) != SPI_SR_TXE)
{
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
{
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_TIMEOUT;
}
}
}
I2SxEXT(hi2s->Instance)->DR = (*pTxData++);
/* Wait until RXNE flag is set */
if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_RXNE, RESET, Timeout) != HAL_OK)
{
return HAL_TIMEOUT;
}
(*pRxData++) = hi2s->Instance->DR;
hi2s->TxXferCount--;
hi2s->RxXferCount--;
}
}
/* Set the I2S State ready */
hi2s->State = HAL_I2S_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2s);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
