Thanks g_martino, but no we don't use RTS/DTR. I patched the kernel all the
same, no joy.
What is telling is this:
Start reading NMEA strings via minicom, no overruns.
Start a user space process then that writes a little to SD, pdflush becomes
more active, then blam, overruns /dev/ttyAM1 @ 4800 baud, and no overruns on
/dev/ttyAM0 @ 115200 baud?!
Looking larger,
m("vger.kernel.org/msg202043.html","//www.mail-archive.com/linux-kernel");">http:
we see others with IRQ5 / pdflush troubles. Is pdflush using IRQ5 or some
other resource? THANKS
--- In "g_martino" <> wrote:
>
> Do you use RTS/DTR?
> Check this:
> http://tech.groups.yahoo.com/group/ts-7000/message/20242
>
> --- In "Clark" <cdunson@> wrote:
> >
> > We have a GPS receiver connected to COM2/ttyAM1 on the TS-7260. It works
> > on 2.26.21, but not on 2.6.29. It's settings are 4800 8N1, and stty gives
> > 'the same' flags. Appears to work ok with minicom, but we cannot write to
> > the GPS receiver on 2.6.29, and we get "ttyAM1: input overrun" during
> > prolonged use reading NMEA strings from it. It's fine on 2.6.21.
> >
> > The 2.6.29 build inserts 8250, with the amba pl010 driver built-in to the
> > kernel (kernel made from scratch with mcrapets' patches), the 2.6.21 build
> > is the stock one from TS. Very odd as ttyAM0 has no overruns, and its baud
> > rate is 115200. ttyAM0 has IRQ 52, while ttyAM1 has IRQ 54. Anyone have a
> > clue? Thanks!
> >
>
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