• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 19 subscribers
  • Views 475 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

cc2430 ADC problems

Kevin Forcade
Prodigy 20 points
Other Parts Discussed in Thread: CC2430, TIMAC

Hello,

 

We have a small design using the cc2430.  It is almost fully functional, Only the ADC remains a problem

 

We are using only the P0_0 line for input so

ADCCFG = 0x01;

we are using only a single conversion so

ADCCON3 = 0x80;

I hope I have the DMA off and all clocks on and I monitor ADCL and ADCH  for any change. 

 irrespective of any input the valuse are always the same

 

 

 

  • 0
    Mastermind 8170 points

    This is what I'm using:

    // From ioCCxx10_bitdef.h

    SFR(  ADCCON3   ,  0xB6  )      /*  ADC Control 3  
    SFR(  ADCH          ,  0xBB  )      /*  ADC Data High

    #define ADCCON3_ECH_AIN0                  (0x00)
    #define ADCCON3_EDIV_64                     (0x00 << 4)
    #define ADCCON3_EREF_AVDD              (0x02 << 6)


    //Configure ADC
       
        ADCCON3 = ADCCON3_EREF_AVDD | ADCCON3_EDIV_64 | ADCCON3_ECH_AIN0;
        your_variable = ADCH;

    //Code

        ADCCON3 = ADCCON3 | ADCCON3_ECH_AIN0;
        your_variable = ADCH;

     

  • 0 in reply to H Stewart
    Prodigy 20 points

    Thanks, but this gives the same problem.  are there configuration isssues of which I may not be aware?

  • 0 in reply to H Stewart
    Expert 1150 points

    Hi,

    I'm facing some problem at the configuring the PORT0 as tristate to read the ADC data ,

    P0INP=0xFF;  I'm using this to make PORT0 to make tristate .

    but only P0.0 is working fine and other pins are behaving something differently , they read different values at the ADC.

    I'm using TIMAC and CC2430 EM and putting this in SmartRF04 evaluation board .

    PODIR=0x00; //making i/p

    P0INP=0x00;// selecting pull up/pull down

    P2INP=0x20; // making port0 as  pull down

    Even I had tried for pulling down the pins here also only PIN P0.0 shows zero volt and other pins are still high.

    why this port is behaving like this..?  

    Is that configuration problem..?

    regards

    Chethan.k.p

  • 0 in reply to chethan kp
    Prodigy 20 points

    I have the same problem with Chethan kp. :(

    Can some one help me?