I've been working with the 7800 and using the A/D conversion for a while. The
majority of the time it works without flaw but if the startup code where the
sampling is setup via TWI messages is called multiple times after a reboot I
end up never being able to select the slave device properly and have to do a
cold reboot to be able to initialize the AVR.
Specifically, I get a 0xF8 response in the TWI status register after writing a
START|TWSIEN to the TWI control register where I should be getting a START
response back. After that, I never get ADC sample again. I have confirmed
this behavior in the example program as well.
Is there some way I can force a reset of the ADC at this point or reset the TWI
controller? Has anyone else seen this problem and found a solution?
Thanks In advance for your held,
David Maynor
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