Thank you Petr I will try
--- In Petr Ledvina <> wrote:
>
> You must enable serial on lower header:
> 0x1200_0000 TS-7400 control register
> bit 0 - if set, enables UART #0 on DIO_18 and
> DIO_19 pins
> bit 1 - if set, enables IRQ on DIO_11 pin
> bit 2 - if set, enables DRQ on DIO_12 pin
> bit 3 - if set, enables 14.7456Mhz clock on DIO_13
>
> so you must set bit 0
>
> I use
> peekpoke 8 0x12000000 0x01
> in linuxrc script in initrd before 'setconsole $CONSOLE' line. So
> console is available on lower header (that has 232 converter on my
> board) early in boot.
>
> If you need to use /dev/ttyAM0 for something other than console,
> modify initscript and maybe use tsbootrom-update to disable ts-bootrom
> output to /dev/ttyAM0.
>
> Also when you enable lower header, pins on upper one will no longer
> work - so ts9440 won't work (use 'boot' switch boot external SPI
> linuxrc script and get console)
>
> Petr
>
> On Tue, Sep 8, 2009 at 00:43, lhamaduck<> wrote:
> >
> >
> > Hi..
> >
> > My question is about the serial ttyAM0 - in the manual is showed this serial
> > in 2 conectors (Upper header and Lower header).
> >
> > Upper header
> > Pin 7 - UART TXD - /dev/ttyAM0
> > Pin 8 - UART RXD - /dev/ttyAM0
> >
> > Lower header
> > Pin 22 - DIO_18 - GPIO 18 or TXD /dev/ttyAM0
> > Pin 23 - DIO_19 - GPIO 19 or RXD /dev/ttyAM0
> >
> > How can I chose between GPIO and Serial in the Lower header?
> > There is configuration parameter?
> >
> > Because this pins is not short-circuit directly
> >
> > thanks
> >
> >
>
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