/*******************************************************************************
* Function Name: UART_1_SpiUartWriteTxData
********************************************************************************
*
* Summary:
* Places a data entry into the transmit buffer to be sent at the next available
* bus time.
* This function is blocking and waits until there is space available to put the
* requested data in the transmit buffer.
*
* Parameters:
* txDataByte: the data to be transmitted.
*
* Return:
* None
*
*******************************************************************************/
void UART_1_SpiUartWriteTxData(uint32 txData)
{
#if(UART_1_INTERNAL_TX_SW_BUFFER_CONST)
uint32 locHead;
uint32 intSourceMask;
#endif /* (UART_1_INTERNAL_TX_SW_BUFFER_CONST) */
#if(UART_1_CHECK_TX_SW_BUFFER)
{
/* Head index to put data */
locHead = (UART_1_txBufferHead + 1u);
/* Adjust TX software buffer index */
if(UART_1_TX_BUFFER_SIZE == locHead)
{
locHead = 0u;
}
while(locHead == UART_1_txBufferTail)
{
/* Wait for space in TX software buffer */
}
/* TX software buffer has at least one room */
if((UART_1_txBufferHead == UART_1_txBufferTail) &&
(UART_1_FIFO_SIZE != UART_1_GET_TX_FIFO_ENTRIES))
{
/* TX software buffer is empty: put data directly in TX FIFO */
UART_1_TX_FIFO_WR_REG = txData;
}
/* Put data in TX software buffer */
else
{
/* Clear old status of INTR_TX_NOT_FULL. It sets at the end of transfer when TX FIFO is empty. */
UART_1_ClearTxInterruptSource(UART_1_INTR_TX_NOT_FULL);
UART_1_PutWordInTxBuffer(locHead, txData);
UART_1_txBufferHead = locHead;
/* Enable interrupt to transmit */
intSourceMask = UART_1_INTR_TX_NOT_FULL;
intSourceMask |= UART_1_GetTxInterruptMode();
UART_1_SpiUartEnableIntTx(intSourceMask);
}
}
#else
{
while(UART_1_FIFO_SIZE == UART_1_GET_TX_FIFO_ENTRIES)
{
/* Block while TX FIFO is FULL */
}
UART_1_TX_FIFO_WR_REG = txData;
}
#endif
}
/*******************************************************************************
* Function Name: UART_1_SpiUartDisableIntTx
****************************************************************************//**
*
* Disables TX interrupt sources.
*
* \return
* Returns TX interrupt sources enabled before function call.
*
*******************************************************************************/
uint32 UART_1_SpiUartDisableIntTx(void)
{
uint32 intSourceMask;
intSourceMask = UART_1_GetTxInterruptMode();
UART_1_SetTxInterruptMode(UART_1_NO_INTR_SOURCES);
return (intSourceMask);
}
