[Paparazzi-devel] Tiny/Gumstix communication

[Paul Cox]

Since there's been some discussions about Gumstix/Tiny communications
recently, I thought I'd point out that a working config using a Twog
and a Overo is documented tersely here:

http://paparazzi.enac.fr/wiki/Overo : bottom of page

The config uses the Twog's GPS UART and the overo forwards the GPS
data to the tiny. It was tested recently (look for twinjet_overo.xml
airframe) but should be considered a work in progress as some parts
aren't done properly.

Those wanting to do SPI with the overo are encouraged to use the LISA
boards as the STM32 SPI implementation is much better than for the
LPC.

Paul

> I'm trying to use SPI to let Tiny2.11 and Gumstix talk to each other. The 
> mission is to have Gumstix as SPI master and gather some data from some 
> devices such as humidy sensors, heat- and pressure sensors. The gumstix will 
> also do other things like controlling a GSM/GPRS modem to send the data to a 
> data store. I want the tiny2 to be the autopilot and use SPI for 
> communication with Gumstix. This means that it has to be an SPI slave since 
> the Gumstix is the master. The problem is that all the modules in paparazzi 
> are using the SPI as a master. There are some definitions for an SPI slave in 
> the hardware code for SPI but I don't see any other code using that. It would 
> be good to know if anybody else is working on a similiar project. Is anybody 
> else using the Tiny2 as an SPI slave?
>
> Júlíus Helgi Bjarnason