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BQ79654-Q1: GETTING WRONG RESULTS

sudhir mishra
Intellectual 355 points
Part Number: BQ79654-Q1

HI all,

i am configuring GPIO of BQ79654-Q1 IC as ADC input and OTUT input.

but i am getting error :- protectors will flag all OT and UT faults on all GPIO inputs as an indication of abnormal detection

my code is below


WriteReg(1,CONTROL2,0X01,1, FRMWRT_SGL_W); //tsref enable
delayus(1500);

//ENABLE GPIO AS ADC AND OTUT

WriteReg(1, GPIO_CONF1, 0x09, 1, FRMWRT_SGL_W);
delayus(100);
WriteReg(1, GPIO_CONF2, 0x09, 1, FRMWRT_SGL_W);
delayus(100);
WriteReg(1, GPIO_CONF3, 0x09, 1, FRMWRT_SGL_W);
delayus(100);
WriteReg(1, GPIO_CONF4,0x09, 1, FRMWRT_SGL_W);
delayus(100);

// WriteReg(1, ACTIVE_CELL, 0x0A, 1, FRMWRT_SGL_W); //set all cells to active
WriteReg(1, ADC_CTRL1, 0x06, 1, FRMWRT_SGL_W); //continuous run and MAIN_GO
delayus(200);

WriteReg(1,OTUT_THRESH, 0Xff,1, FRMWRT_SGL_W); //oyut thresold set
WriteReg(1,OTUT_CTRL,0x01,1, FRMWRT_SGL_W); //otut mode

WriteReg(1,OTUT_CTRL,0x05,1, FRMWRT_SGL_W); //otut go

Plese help me .

Thanks 

  • +1
    TI__Expert 5170 points

    Sudhir,

    It is odd that both OT and UT faults are being triggered for all of the GPIO pins. To be clear, are you reading 0xFF from both FAULT_OT and FAULT_UT registers? That might indicate that the value of the GPIO registers is fluctuating a lot, triggering both OT and UT faults. What do you read from the GPIO*_HI/LO registers? Is it what you are expecting? And if you clear the fault using FAULT_RST1/2 does it come back or does it only happen once?

    Regards,

    Ben 

  • 0 in reply to Benjamin Luty
    Intellectual 355 points

    Hi Benjamin 

    after clear the fault using FAULT_RST1 its working fine.

    Thanks