Re: [Gumstix-users] serial driver & high uart rates

[Brad M. <bmi...@gm...>]

Patrick

> I've used the stock (Linux 3.0) serial drivers at 460800bps and
> patched drivers up to 1.5Mbps.  The patched drivers should work
> up to 3Mbps.

The rate we really need is 921k.

> One of my collegues noticed that a couple of zero bytes are
> transmitted by the omap processor at a fixed interval (can't
> remember exactly how long, but I think it was 192us) after the
> start of a block of received data.  On short receive bursts,
> the TX line stays idle, but on long receive bursts, 1 or 2 "0"
> bytes are transmitted.

Is that a hardware bug? this would probably kill the hci connection.

> The patches only change the baud rate clock divider from 13 to
> 16 for speeds of 1M, 1.5M, and 3.0M.

was 921k fixed by this? iirc it was not getting set properly.

-- 
Brad Midgley