On 9/03/21 9:27 am, Chris Packham wrote: > On 8/03/21 5:59 pm, Guenter Roeck wrote: >> Other than that, the only other real idea I have would be to monitor >> the i2c bus. > I am in the fortunate position of being able to go into the office and > even happen to have the expensive scope at the moment. Now I just need > to find a tame HW engineer so I don't burn myself trying to attach the > probes. One thing I see on the scope is that when there is a CPU load there appears to be some clock stretching going on (SCL is held low some times). I don't see it without the CPU load. It's hard to correlate a clock stretching event with a bad read or error but it is one area where the SMBUS spec has a maximum that might cause the device to give up waiting.
