1.34.27.8 1.35.21.8 USARTx_WriteBufferSizeGet Function
C
/* x = USART instance number */
/* Ring buffer mode */
size_t USARTx_WriteBufferSizeGet(void)
Summary
Returns the size of the internal transmit ring buffer
Description
This function returns the size of the transmit ring buffer, which is same as the size of the transmit ring buffer configured in MHC.
Precondition
USARTx_Initialize must have been called for the associated USART instance.
Parameters
None
Returns
The API returns the size of the transmit ring buffer. If 9-bit mode is enabled, then the return value indicates the number of 9-bit data that can be copied to the internal transmit ring buffer.
Example
size_t txBufferSize;
txBufferSize = USART1_WriteBufferSizeGet();
// Set a threshold to get notification when the transmit ring buffer is empty
USART1_WriteThresholdSet(txBufferSize);
Remarks
None