USB ADC-11/10 Reading Problems

 
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Jph
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Joined: 03 Jul 2008
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PostPosted: Thu Jul 03, 2008 11:31 am    Post subject: USB ADC-11/10 Reading Problems Reply with quote
Hi,

I'm using a USB ADC-11/10 and LM35 sensors to view temperature on my laptop. I have to use all 11 channels for my project. However i faced some big problems:

Everything's fine when using Picoscope but, since i have to use the C code provided by picotech, things are not going well when i run the C code.

For example, true readings are 236, 240, 248 mV for channels 1, 2, 3 respectively. But when C code used, the results are 315, 237 and 247mV. Channel 2 and 3 are ok but the reading for channel 1 is false.

It's the same case when channels 2, 3 and 4 are used. This time, channel 2 gives strange results.

I tried various combinations for connections and changed many LM35 sensor, I downloaded the software development key R1.0.0 and tried to solve this problem but nothing changed.

I strongly think that "usbadc11con.c" code has some problems that i cannot solve. What are your suggestions?

Thanks
Jph
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