Re: [ts-7000] Re: Read ADC

[Dan Weese <>]

On Mon, Apr 12, 2010 at 5:15 AM, rodriguezromain62 <> wrote:

 

Thanks a lot, know i read ADC value to channel 1 and I put the value on my website with a refresh of 1,5sec.
But i have an other problem, i need to print the value of the chan 0,1,2 & 3. I use AJAX for refresh my value, but only one value is print. My php code looks like :

$resu_A= array() ;
$resu_A=exec("/home/PROGRAMMES/testADCbinaire -r 0");
$ANA0=($resu_A);

$resu_b= array() ;
$resu_b=exec("/home/PROGRAMMES/testADCbinaire -r 1");
$ANA1=($resu_b);

For further debugging, try the full exec

$resu_A=exec("/home/PROGRAMMES/testADCbinaire -r 0", $deExec, $retVal);

 

I've modified the ts7800ctl.c for do just 1 sample and convert the raw value to volt value.

Only the first $ANA0 is print... If I delete the first sample, the second ($ANA1) is print. I dont understand why, if you have any idea for help me. thanks

--- In ts-7000%40yahoogroups.com, "Harold" <> wrote:
>
> The values from ts7800ctl -r are the raw binary ADC values, as described in the manual.
> http://www.embeddedarm.com/about/resource.php?item=393#section5.3
> From looking at ts7800ctl.c and twsi.h, it appears that the ADC values start at address 0xE8100004, and there are 4096 bytes containing 2048 ADC samples.
>
> --- In ts-7000%40yahoogroups.com, "rodriguezromain62" <rodriguezromain62@> wrote:
> >
> > Hello everybody, i'm a student in training. I living in France, and i need some help about ADC on TS7800.
> >
> > I try to understand the ts7800ctl programm but i dont :/
> > What is the value I can see when i start programm with -r ?
> >
> >
> > I just need to read Value of ADC channel, in the manual it says we can read ADC with MMAP. I need that but i dont know the register!
> > how ADC works ?
> >
> > Thanks.
> > I need some help please.
> >
>

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