Using one of the spare EP930x timers, I am actually getting quite
reliable and accurate timing for sampling signals at a rate of
~5.3kS/s. Also, although I haven't had a chance to test, I am hoping
that I will be able to do this across multiple channels (up to 6
channels, giving ~32kS/s total).
Which reminds me, I was going to see if anyone was interested in the
drivers that I have written for ADC sampling? Probably not terribly
robust yet, since I only have the one board to play with at the
moment, but could be useful nonetheless. Let me know if you are and
I will post them.
Cheers
Phil
--- In Jim Jackson <> wrote:
>
>
> On Wed, 8 Feb 2006, Phil wrote:
> > --- In "ajbanand" <ajbanand@> wrote:
> > >
> > > Hi all,
> > >
> > > i have TS-7250 with MAX197 ADC.
> > > i am trying to provide voice support to my board using the ADC.
> > > i have configured my ADC for single channel usage..
> > > its not giving proper digital values for the analog input, i am
> > getting
> > > value like 0,5,17 etc all less than 100. for bipolar -5 tp +5
range
> > > these values all seem to be noise..
> > > can anyone please explain what could be wrong in my approach...
> >
> > If you reply with the code that you are using, you will get a
better
> > response from the members of this group. Without it, we can't
really
> > help.
> >
>
> Also it would be of use to know the circuit schematic for the
electronics
> feeding the input.
>
> However having said that, I can't see how you can reliably use the
MAX197
> for sampling voice or anyother signal > half the the Kernel HZ
value.
> Timing for the sampes will not be accurate enough, even though
sampling
> one input only, one can get sampling rates of upto 50K samples/sec
(If my
> memory if correct).
>
> Jim
>
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|