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Re: IXP425 UART Problem
- From: Nick Garnett <nickg at ecoscentric dot com>
- To: "Jamaluddin Khan" <jamaluddin dot khan at aftek dot com>
- Cc: <ecos-discuss at sourceware dot org>, "Sandeep Kajale" <sandeep dot kajale at aftek dot com>
- Date: 23 Nov 2006 09:46:43 +0000
- Subject: Re: [ECOS] IXP425 UART Problem
- References: <DBBC5277683005489A2CA0AD2BCAED970D8D93@dcsrv.aftek.com>
"Jamaluddin Khan" <jamaluddin.khan@aftek.com> writes:
> Hi,
>
> We are running redboot on IXP 425 platform. The IXP425 has a known bug
> that when the UART break indicator (fourth bit of LSR) is de-asserted,
> it is possible for the UART to detect a start bit and receive an
> incorrect 0xFF byte. And this bug is not fixed.
>
> So when this incorrect 0xFF byte received the bootloader goes in
> blocking read mon_read_char() and the bootloader gets stuck up there.
>
> Does anybody have any workaround for this?
You could try fixing it in the driver: after detecting a break throw
away any 0xFF bytes received.
It may also be worthwhile working out why you are getting breaks in
the first place.
--
Nick Garnett eCos Kernel Architect
http://www.ecoscentric.com The eCos and RedBoot experts
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