/*******************************************************************************
* Function Name: UART_SpiUartReadRxData
********************************************************************************
*
* Summary:
* Retrieves the next data element from the receive buffer.
* - RX software buffer is disabled: Returns data element retrieved from
* RX FIFO. Undefined data will be returned if the RX FIFO is empty.
* - RX software buffer is enabled: Returns data element from the software
* receive buffer. Zero value is returned if the software receive buffer
* is empty.
*
* Parameters:
* None
*
* Return:
* Next data element from the receive buffer.
*
* Global Variables:
* Look into UART_SpiInit for description.
*
*******************************************************************************/
uint32 UART_SpiUartReadRxData(void)
{
uint32 rxData = 0u;
#if (UART_INTERNAL_RX_SW_BUFFER_CONST)
uint32 locTail;
#endif /* (UART_INTERNAL_RX_SW_BUFFER_CONST) */
#if (UART_CHECK_RX_SW_BUFFER)
{
if (UART_rxBufferHead != UART_rxBufferTail)
{
/* There is data in RX software buffer */
/* Calculate index to read from */
locTail = (UART_rxBufferTail + 1u);
if (UART_INTERNAL_RX_BUFFER_SIZE == locTail)
{
locTail = 0u;
}
/* Get data from RX software buffer */
rxData = UART_GetWordFromRxBuffer(locTail);
/* Change index in the buffer */
UART_rxBufferTail = locTail;
#if (UART_CHECK_UART_RTS_CONTROL_FLOW)
{
/* Check if RX Not Empty is disabled in the interrupt */
if (0u == (UART_INTR_RX_MASK_REG & UART_INTR_RX_NOT_EMPTY))
{
/* Enable RX Not Empty interrupt source to continue
* receiving data into software buffer.
*/
UART_INTR_RX_MASK_REG |= UART_INTR_RX_NOT_EMPTY;
}
}
#endif
}
}
#else
{
/* Read data from RX FIFO */
rxData = UART_RX_FIFO_RD_REG;
}
#endif
return (rxData);
}
/*******************************************************************************
* Function Name: UART_SpiUartReadRxData
********************************************************************************
*
* Summary:
* Retrieves the next data element from the receive buffer. Undefined data will
* be returned if the RX buffer is empty.
* Call UART_SpiUartGetRxBufferSize() to return buffer size.
* - RX software buffer disabled: Returns data element retrieved from RX FIFO.
* - RX software buffer enabled: Returns data element from the software
* receive buffer.
*
* Parameters:
* None
*
* Return:
* Next data element from the receive buffer.
*
* Global Variables:
* Look into UART_SpiInit for description.
*
*******************************************************************************/
uint32 UART_SpiUartReadRxData(void)
{
uint32 rxData = 0u;
#if(UART_INTERNAL_RX_SW_BUFFER_CONST)
uint32 locTail;
#endif /* (UART_INTERNAL_RX_SW_BUFFER_CONST) */
#if(UART_CHECK_RX_SW_BUFFER)
{
if(UART_rxBufferHead != UART_rxBufferTail)
{
/* There is data in RX software buffer */
/* Calculate index to read from */
locTail = (UART_rxBufferTail + 1u);
if(UART_RX_BUFFER_SIZE == locTail)
{
locTail = 0u;
}
/* Get data fron RX software buffer */
rxData = UART_GetWordFromRxBuffer(locTail);
/* Change index in the buffer */
UART_rxBufferTail = locTail;
}
}
#else
{
rxData = UART_RX_FIFO_RD_REG; /* Read data from RX FIFO */
}
#endif
return(rxData);
}
