Re: [Gumstix-users] Do I have the wrong board???

[Dave H. <dhy...@gm...>]

Hi Frank,

On 8/12/05, Frank <fra...@ya...> wrote:
> No, It has one chip like the second jpeg photo. So I guess it's
> the STUART board. I bought the EtherStix pack. But why does the
> HWUART show up in the interrupt table instead of the STUART? Is
> the second tty ttyS2 or ttyS3 and is there something else I
> should be doing to the gpio lines to get the second tty to work?

The mapping is printed on the console at boot time. You should see:

ttyS0 at MMIO 0x40100000 (irq =3D 15) is a FFUART
ttyS1 at MMIO 0x40200000 (irq =3D 14) is a BTUART
ttyS2 at MMIO 0x40700000 (irq =3D 13) is a STUART
ttyS3 at MMIO 0x41600000 (irq =3D 0) is a HWUART

My guess is that /proc/interrupts is only showing you allocated
interrupts. The serial drivers allocate and free irq's as they're
opened and closed.

I pulled these from the mailing list archives:

modprobe proc_gpio
echo "AF2 in" >/proc/gpio/GPIO46
echo "AF1 out" >/proc/gpio/GPIO47
stty -F /dev/ttyS2 -ixon speed 115200

echo "AF1 out" >/proc/gpio/GPIO48
echo "AF1 in" >/proc/gpio/GPIO49
stty -F /dev/ttyS3 -ixon speed 115200

--=20
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/