On 12/11/06, Jakob Bj=F8rn <jbjo03@...> wrote:
> I am currently working on a small toy helicopter (Draganflyer), on
> this we have put a gumstix/robostix pack. We have some sensor data on
> the on the Robostix, and from a ultra sonic range finder (SRF08), that
> we need to relay to the gumstix in the fastest manner possible. All
> our UART connections are used, so the I2C connection is the only one
> I have made it work with 100 kHz clock, but I would like to run 400
> kHz. I have checked that all the devices should be able to handle the
> 400 kHz clock. In the setup the Gumstix is the Master.
The SRF08, in its default configuration, takes 65 milliseconds to
complete a ranging operation. Are you sure you really need the
reduction in data transfer latency you'll get by going to a 400kHz
clock? The delay imposed by the sensor itself is much larger.