> Hello,
>
> I need more information about the 7800's ADC. I've found only one
> sample program (little strange to me) that does the ADC conversion and
I assume you're referring to ts7800ctl.c here?
> the wiring diagram.
> If I'm right the AVR by ATMEL is used for the ADC. The AVR is
> connected to CPU via I2C.
>
> But what is the actual sampling method of the AVR? (Is it possible to
> change it?)
The actual sampling method is successive approximation and this is
implemented by the AVR itself and it is not possible to change. The sample
rate (2kHz) and number of samples taken per command (2048) are design
limitations inherent in the AVR program and the mechanism it needs to use to
storing samples, although you can sample continuously simply by sending
periodic commands to the AVR to get the next set of samples.
> Is there any description of the "commands" sending between CPU and AVR?
The source code is the documentation at this point. :-)
> Any additional information is much appreciated.
I'm going to be updating the preliminary manual (the bleeding edge version
on my personal support page; the official released version won't change
until I'm finished) with some more information on the ADC as I can piece it
to together, hopefully that will help.
> Jiri
______ Best Regards,
|__ __/ Michael Schmidt
|| Software Engineer
||echnologic Systems (EmbeddedARM.com)
|| (480) 16610 East Laser Drive #10
|/ 837-5200 Fountain Hills, AZ 85268
http://oz.embeddedarm.com/~michael
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