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UART half duplex Tx enable switching problem

Question asked by bspdTOK on Jun 4, 2012
Latest reply on Jun 6, 2012 by erwin
I'm implementing a half duplex communication on a STR912 mcu.
My problem is the usual, to know when the last bit is transmitted in the last byte. This to know when to turn off the transmit enable to the RS485 driver. The enable signal is controlled with a separate IO-pin.

I'm primarily trying to find an application note describing this. I've not even managed to find a reasonable complete description of the uart's functionality, just bits and pieces here and there.

Anyone with info out there?
Thanks in advance.