[Soekris] GPIO support for the net-4801 on Linux

[Arnau Sanchez]

Jan Neskudla escribió:

>> By the way, has anybody tested the TTL COM2 included in the 20-pin GPIO
>> connector?

> i was playing a bit with that COM port. It it`s not a COM2 TTL , it is only
> TTL of COM1 it means that you can use DB-9 connector to use COM1 with RS232 bus
> driver or plug your device directly to TTL input of COM1. So there are only two
> serial ports COM0 COM1. I case of using TTL levels the driver chip MAX??? is
> disabled (i thing).

I've tested on my net4801 and it works well. It has two separated COM, the 
external and the internal (this ine accesible both via RS232 or TTL levels).

sk1:/etc# setserial /dev/ttyS0
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4

sk1:/etc# setserial /dev/ttyS1
/dev/ttyS1, UART: 16550A, Port: 0x02f8, IRQ: 3

(using linux 2.6.17)

regards
arnau