CCS/TMS570LS0432: ADC is not working

Indrajit Lawande95

Part Number: TMS570LS0432
Other Parts Discussed in Thread: HALCOGEN

Tool/software: Code Composer Studio

Hi, I have just started programming on TMS570ls043 launchpad . I am very new to these controller . also i have seen the videos and how to use Halcogen software to program TMS570 .

I have written simple program for ADC and have properly configured ADC for channel 9 which is connected to light sensor and software trigger .

Following is my code , its not working

    while(1)
    {
        adcStartConversion(adcREG1, 2U);
        while((adcIsConversionComplete(adcREG1, 2U))==0);
        adcGetData(adcREG1, 2U, &adcdata);
        value = (uint16)ptr->value;
        delayms(500);

    }

please help me to move forward.

Thanks .

over 9 years ago

0 QJ Wang over 9 years ago

TI__Guru**** 200676 points

Hello,

Please select the channels (channel 9 in your example) that need to be converted in Group2 by writing to the Group2 select register (ADG2SEL).

adc->GxSEL[2] = (0x1 << 9); //place this statement before while() loop

0 Indrajit Lawande95 over 9 years ago in reply to QJ Wang

Expert 1350 points

Hi ,
Actually i have configured the same using Halcogen .
And now i have just checked it same with the line you sent . But still it is not working ,what is thought , ADC is not getting trigger that is start of conversion is not working . I have selected trigger from software and the line in code ADCstart is for that. Every time i am getting same value in the adc result variable (value = 47548) and i think it is garbage value .
what might me missing in my configuration .
Thanks .

0 QJ Wang over 9 years ago in reply to Indrajit Lawande95

TI__Guru**** 200676 points

Hello,

Please try this project:

1641.TMS570LS0432_ADC.zip

Arm-based microcontrollers

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CCS/TMS570LS0432: ADC is not working