Hello all,

I know some people in the Balloon community have done a lot more work 
with I2C than I have. I'm now using I2C more intensively and having some 
problems. It works most of the time but will more or less randomly give 
up and say, 'i2c-pxa: timeout waiting for bus free'. Adding some debug 
to the i2c code shows that the PXA's I2C controller is claiming to be 
busy at these times. Has anyone else seen this?

My current theory is that the ratsnest of wires I'm testing with is 
causing some electrical unpleasantness, which results in a bogus START 
condition that the PXA's I2C controller is seeing and then waiting ad 
infinitum for a STOP condition. For now, the problem seems to have gone 
away after a rearrangement of scope probe earths and things, but I'm not 
fully confident of having cured it.

Chris
-- 
Chris Jones - chris@martin-jones.com
Martin-Jones Technology Ltd c/o Element Energy Ltd
Twenty Station Road, Cambridge, CB1 2JD, UK
Phone +44 (0) 1223 655611 Fax +44 (0) 870 112 3908