Major Problems with Software (and hardware?) ADC Delta Sigma Reading Way Off

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ToVa_285016
Level 5
Level 5
100 replies posted 50 replies posted 50 questions asked

 Hi,

   

I did some work on a circuit board to convert a load cell output (0-15mV) into a force that is transmitted to a PC.  The software worked fine, and then I lost it, and recreated it.  Now nothing seems to work.  There are a few things that stick out:

   

-The load ADC does not read accurately at all, and bounces around a lot.  If I set it up as it is in the file, it reads off when given a 10mV signal.  It reads off about 40%, and bounces around.  If I set it up as a level shift buffer in order to maximize the resolution it actually reads negative.

   

-There is an error by my first interrupt handler that I do not understand.

   

-A lot of the 'smart completion' selections are missing entirely.  I try to type 'UART_PutString' and it never appears under the smart completion options.

   

Any ideas are greatly appreciated.

   

Thank you,

   

Tom

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ETRO_SSN583
Level 9
Level 9
250 likes received 100 sign-ins 5 likes given

Double post, thread being handled here -

   

 

   

    

   

          

   

http://www.cypress.com/?app=forum&id=2232&rID=105296

   

 

   

 

   

Regards, Dana.

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