TwoWire::flush(void) to flush rxBuffer missing

[RobTillaart]

Missing in Wire lib is the flush() which can be quite straightforward.

void TwoWire::flush(void)
{
  rxBufferIndex = 0;
  rxBufferLength = 0;
}

maybe it should be called rxFlush() to allow a txFlush() in the future.

This allows one to flush the receive buffer e.g. after reading first byte which indicates the type of the answer.

if (Wire.Read() != 5)
{
  Wire.flush();
}
else processBuffer();

[sngl]

Hello @RobTillaart ,
usually the flush() function is used to wait that all the data present in a buffer is transmitted/processed (see Serial.flush() ) and not to clear the rxBuffer.
That flush function you implemeted can be misleading if some user used other flush functions.

[RobTillaart]

Thanks, I've looked at Serial.FLush() and understand the interpretation

Maybe the function I needed can be called

Wire.clearRxBuffer()
{
rxBufferIndex = 0;
rxBufferLength = 0;
}

[sandeepmistry]

I'm marking this as won't fix, flush() is intended for TX only and is not needed in the Wire lib.