Implement Tx only Flush #3433
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Implement Tx only Flush #3433
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Add the option to cause Flush() to just wait for tx data to clear the tx fifo and uart, leave the rx queue and rx fifo as is.
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Second attempt to create a
Serial.flush()that does not affect the rx data queue or rxFifo.Serial.flush(true);will hang until all tx Data has been sent out the UART. It will not clear the rx data queue.