Thanks for the response. Is there a reliable way that you know of to determine
the state of the conversion process to prevent overlapping commands?
--- In "Harold" <> wrote:
>
>
>
> You could try resetting the TWSI controller by writing 0 to the TWSI soft
> reset register, but that probably will not help. I have found that if I try
> to send TWSI commands to the AVR microcontroller when it is busy doing ADC
> conversions, it will lock up. When this happens, the only way I have found to
> reset the AVR is to cycle power. It would be nice if there were some way to
> reset the AVR from the TS-7800, but I have not found a way to do that.
>
> --- In "MusicalBoredom" <board_music@> wrote:
> >
> > 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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