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Date: Sat, 15 Sep 2007 13:46:04 +0200
From: Anders Blomdell <anders.blomdell@domain.hid>
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Subject: Re: [Xenomai-help] too fast write to serialport?
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To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai@xenomai.org

Jan Kiszka wrote:
>> Do you mean that the serial driver (you wrote) has currently no
>> way to know if written bytes have been sent on the wire by the UART ?
> 
> That is true. The asynchronous transmitting of data was intentionally
> installed, but I didn't consider to establish some interface to request
> and/or synchronise on the output completion. Will think about this when
> time permits.
One way would be to implement ioctl for setting TxBufffer size, then 
with proper coding, TxBufSize = 0 would (analogous to 0 size FIFO) imply 
rendezvous semantics.

Just my 5 cents

Regards

Anders Blomdell