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I have couple of doubts. How actually are you using the the device node adc1 to adc8 for extracting the result. After the result of conversion gets redirected to the device files,
how to use that result. Can you let me know the exact process that is required to extract the output of adc
,how to store it in a raw file( i mean what format should be adopted) and what kind of utility to use for converting it to a particular format so that it can be played. Kindly reply . Thanking You
Anand.
Hi Anand,
Having a look over your code the most obvious thing I can see with
it is the line
#define CTRL_BYTE 0x10f00000
I think it should be this
#define CTRL_BYTE
0x10c00000
Cheers
Phil
--- In anand bhavnani <> wrote:
>
> hello jim,
>
> you have mentioned about a driver that worked for u at
> 5.3k, please mail it.
>
> also i have attatched the code of the driver that i am
> trying to use, but as i have already mentioned its not
> working.
>
> you also said that MAX 197 is not reliable, why
> exactly are u saying so...any technical issues with
> it...
>
> waiting for ur reply,
>
> //anand
>
> --- Jim Jackson <> wrote:
>
> >
> >
> >
> > On Thu, 9 Feb 2006, Phil wrote:
> >
> > >
> > > 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.
> >
> > I'd be very interested.
> >
> > Jim
> >
> > > --- In Jim Jackson
> > <jj@> 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 re!
ply 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
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
> "Stay HUNGRY. Stay FOOLISH." Steve Jobs
>
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