Problems with USB ADC-11/12 and too big values

 
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Harald Weber
Guest
PostPosted: Fri Oct 28, 2005 11:06 am    Post subject: Problems with USB ADC-11/12 and too big values Reply with quote
I write a software to measure 10 channels with USB ADC-11/12. If I measure, I get some values which are too big. The values are 0xFFFF (65535). What does this mean. My code seems to be ok.

Code:
no_of_channels = 10;
channels[0] = 1;
channels[1] = 2;
channels[2] = 3;
channels[3] = 4;
channels[4] = 5;
channels[5] = 6;
channels[6] = 7;
channels[7] = 8;
channels[8] = 9;
channels[9] = 10;
adc11_open_unit(101, 111);
max_adc_value = adc11_max_value();
if (!adc11_is_streaming()){
     return;
}
adc11_set_trigger(false, true, 1000, 0, false, 80, -10);
actual = adc11_set_interval (1000000, 1000, channels, no_of_channels);
adc11_run (10000, BM_STREAM);
while (!adc11_ready ()){
    Sleep (100);
}
while (!Terminated){
     no_of_values = adc11_get_times_and_values (times, values, 100000);
}
adc11_stop ();
adc11_close_unit(101);


Best Regards
Harald Weber
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Michael
Guru
Guru


Joined: 07 Jul 2005
Posts: 93
Location: St Neots, Cambridgeshire
PostPosted: Tue Nov 01, 2005 4:19 pm    Post subject: Reply with quote
Hello,

The drivers for the USB ADC11 have been recently updated.

Try downloading the dirvers from our website and let me know how you get on.

Best regards,
Michael
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Harald Weber
Guest
PostPosted: Wed Nov 02, 2005 8:18 am    Post subject: Reply with quote
Hello Michael,

I loaded the new Driver from your website, but the result is the same as before.

Best regards,

Harald Weber
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Sarah
Guest
PostPosted: Tue Nov 08, 2005 9:49 am    Post subject: Reply with quote
Hi Harald

Thank you for your post.

If you use Picolog do you still get these high readings?
At what point do the readings occur? Is it all the time or just at the beginning or a certain time?

If you can let me know some more information then this will help us find the root of this issue.

Best Regards
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AndyC
Guest
PostPosted: Thu Nov 10, 2005 4:52 pm    Post subject: Me Too! Reply with quote
I get this too!
I downloaded the new drivers this afternoon.
It looks like the first 6 values returned from adc11_get_times_and_values are often 65535.

When I use the demo program to stream the data, I get loads of discontinuities in the log file. I thought streaming was supposed to get round this?
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