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MSP430FR2522: How to turn of calibration at start up

Rick Cameron
Prodigy 40 points
Part Number: MSP430FR2522

Hi, I am using the FR2522 as a capacitive sensor by reading filterCount. The sensor will start sometimes in open air and sometimes in the presence of an object. I want to keep the calibration when starting in the presence of air so I don't get negative filterCount values. How would I turn of the start up calibration or get the startup calibration values and hard code them? How would I do this in CCS? I have already built a project and it would probably take longer If changes where made back in the captivate gui.

Cheers

Rick

  • 0
    Prodigy 40 points

    This is how the prox sensor is already set, and I am getting the startup calibration problem when starting in the presence of material;

    tSensor PRX00 =
{
    // Basic Properties
    .TypeOfSensor = eProx,
    .SensingMethod = eSelf,
    .DirectionOfInterest = eDOIDown,
    .pvCallback = NULL,
    .ui8NrOfCycles = 1,
    .pCycle = PRX00_Cycles,
    .pSensorParams = (tGenericSensorParams*)&PRX00_Params,
    // Conversion Control Parameters
    .ui16ConversionCount = 1000,
    .ui16ConversionGain = 80,
    .ui8FreqDiv = 1,
    .ui8ChargeLength = 1,
    .ui8TransferLength = 1,
    .bModEnable = true,
    .ui8BiasControl = 3,
    .bCsDischarge = true,
    .bLpmControl = false,
    .ui8InputSyncControl = 0,
    .bTimerSyncControl = false,
    .bIdleState = true,
    // Tuning  Parameters
    .ui16ProxThreshold = 60,
    .ui16NegativeTouchThreshold = 30,
    .ui16ErrorThreshold = 8191,
    .ui16TimeoutThreshold = 65535,
    .ProxDbThreshold.DbIn = 1,
    .ProxDbThreshold.DbOut = 0,
    .TouchDbThreshold.DbIn = 1,
    .TouchDbThreshold.DbOut = 0,
    .bCountFilterEnable = true,
    .ui8CntBeta = 1,
    .bSensorHalt = false,
    .bPTSensorHalt = true,
    .bPTElementHalt = true,
    .ui8LTABeta = 7,
    .bReCalibrateEnable = false,
};

  • 0
    Prodigy 40 points

    rawCount during run time is also adjusted based on startup calibration

  • 0 in reply to Rick Cameron
    TI__Mastermind 37100 points

    FR2633_selfmode.zip

    You can refer to this code. It will record the calibration when the code first run.

  • +1 in reply to Eason Zhou
    Prodigy 40 points

    Thanks Eason. I had trouble debugging the code, but it was still useful. I ended up running this one time after the normal start up calibration;

        extern tCaptivateElementTuning CapSensorTuning[4] =
{
    { 251, 2, 11 },
    { 246, 2, 11 },
    { 218,  2, 12 },
    { 214, 2, 12 }
};
    
    int i=0;
    for (i=0;i<4;i++){
        g_uiApp.pSensorList[0]->pCycle[0]->pElements[0]->pTuning[i]=CapSensorTuning[i];
    }

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