[Voyage-linux] LPC connector on Wrap.2c board

[Jake Vickers]

Hello everyone. I just joined the mailing list, and I'm looking for help 
on a specific problem.
The Wrap.2c board has 1 serial, which is normally used for console 
output (as you know). But it has a LPC connector on board that I was 
under the impression could be configured to add another serial port to 
the board. Has anyone had any experience with this? I'm mainly looking 
to turn a couple pins hi/low to turn on some relays and I contacted the 
support people over at PCEngines, but his reply is over my head (it 
didn't make sense to me). Here's his reply:

<--my message to him-->
Sorry, maybe I'm not understanding or did not make myself clear.
I'd like to use the LPC interface to control some relays. Simple on/off 
type (solid state).
I need to control 4 of them or I'd use the serial interface (utilizing 
DTR and CTS). I'm mainly interested in how to control the following pins 
(to set them either as on or off):
3     LAD0     LPC Data 0
5     LAD1     LPC Data 1
7     LAD2     LPC Data 2
9     LAD3     LPC Data 3

I'm not a core level programmer, so I was hoping that these pins had 
already been assigned a HEX address that could be called to set them as 
either high or low. I appreciate the information you did send me, and I 
have downloaded the SC1100 data book. It is a wealth of knowledge, but 
most of it seems over my head.
Do you know of anyone who has used this for extra serial ports, or other 
such devices?
Thanks! I appreciate you taking the time to reply!

<--his reply-->
1. turn off LPC function -> config register, I/O offset 09030h (32 bit) 
-> clear bits 14, 16

2. program GPIO pins -> registers starting at I/O offset 0F400h.
First program the individual pin configurations (offset 0F420 / 0F424), 
pin by pin.
Then access the GPIO data out registers to control the pins.

I recommend testing under DOS first before fighting a Linux or *BSD kernel.


<--end-->
Does that make sense to anyone? Ideally I'd like to have a second serial 
port on this board, but if I can just turn the above pins on/off in C 
code that would be fine as well.
Thanks for taking the time to read this!

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