mm9z1_638 Sleep Error with current Threshold (d2d Error)

draven — Wed, 25 Sep 2019 06:28:48 GMT

Hello friends,

I am devolopment on mm9z1_638. I use ADC to get current,voltages and temperatures.

I sleep the uC for every 1 minute. There is two condition for wake up.

One is depends on timer and another is current threshold. But every time isrD2DErr interrupt handled and code is stuck in there.

If I not open current threshold, error is not happen.

If a reset uC software run until error occur.

D2DSTAT0 register is : 10010001.

Error context is:

Time Out Error Flag — This read-only flag indicates the initiator has detected a timeout error. This flag is cleared when the ERRIF bit is cleared by writing a 1 to the ERRIF bit.

Also when I test with debugging I saw program stuch at PGAAutoZero(); function.

My sleep code sequence is :

void Sleep()
{
DDRA_DDRA7 = 1;
PTA_PTA7 = 0;
InitSleepTimer();
ADCDisable();
TsenseDisable();
B_GPIO_VSENSE = 0;
ADCLpEnable();
InitSleepCurrent();
CAN_STDBY(STANDBYMODE);
PTA_PTA1 = 0;
PCREnterStopMode();

//sleep here

B_WD_CTL = WD_OFF;
MeasurementStart(); // function is init V,I and T channels and ADCInit
CAN_STDBY(NORMALMODE);
DDRA_DDRA7 = 1;
PTA_PTA7 = 1;
}

void InitSleepTimer()
{

B_GPIO_CTL = B_GPIO_CTL_DIR3M_MASK | B_GPIO_CTL_DIR3_MASK;
// route Timer OC3 to PTB3

B_GPIO_OUT3_TCOMP3 = 1;

// set Timer Ch3 to OC

B_TIOS_IOS3 = 1;

B_TSCR1_TEN = 1;

B_TCTL1 = 0x80; // clear on OC

B_CFORC_FOC3 = 1; // force OC

B_TSCR1_TEN = 0; // disable timer because it will start start of sleep mode

// setup a rising edge in 10s

B_TCTL1 = 0xC0; // set on OC

//B_TC3 = B_TC3 + 60000; // reload 60s
B_TC3 = B_TC3 + 5000;
B_TFLG1_C3F = 1;

B_PCR_WUE_WUPTB3 = 1; //enable wakeup on ptb3 (rising edge)
}

void InitSleepCurrent()
{
B_ACQ_CTH = 100;
B_PCR_WUEH_WUCTH = 1;
}

Error interrupt is :

interrupt VectorNumber_Vd2di_err void isrD2DErr(void) {

while(1) {
if(D2DSTAT0_ERRIF) {
D2DSTAT0_ERRIF = 1; // clear flag
}else{
PCRReset(); // issue an analog die reset
}
}
}

TYPE_DRV638_RETURN PGAAutoZero(void) {

if(!B_ACQ_CTL_CMEN) // current measurement ACQ must be active
return ERR_CONFIG;

B_COMP_CTL = PGAAutoZeroEnableMask; // PGA Input Zero and start PGA Offset compensation sequence
while(!B_COMP_SR_PGAOF) DO_NOTHING; // wait until PGA AutoZero sequence finished
B_COMP_CTL = PGAAutoZeroDisableMask; // disable PGA Input Zero and PGA Offset compensation sequence
B_COMP_SR = B_COMP_SR_PGAOF_MASK ; // clear flag (after disable)

return OK;
}

code stuch at while(!B_COMP_SR_PGAOF) DO_NOTHING;

Please someone can help me.

Best regards.

Re: mm9z1_638 Sleep Error with current Threshold (d2d Error)

Q_man — Wed, 25 Sep 2019 12:55:50 GMT

Hi,

The error is most likely related to the VDDH / VDDD2D being 0V, whilst the uC tries to access the D2D interface (read/write to registers on the analog die). This would generate such a D2Derror.

With the debugger connected the uC will not enter STOP mode (limitation of the MM9Z1_638 device). Do you see the same issue without the debugger connected?

Rgds

Wolfgang

Re: mm9z1_638 Sleep Error with current Threshold (d2d Error)

draven — Wed, 25 Sep 2019 13:02:45 GMT

@WolfgangBihlmayr

yes I saw without debugger. Also i tried sleep mode now. And I read mcu's datasheet that say "Having any analog die IRQ allowed when entering Low-power mode is not recommended".

Now i am trying with this sleep code but error is exist.

void Sleep()
{

DDRA_DDRA7 = 1;
PTA_PTA7 = 0;

InitSleepTimer();
InitSleepCurrent();
TsenseDisable();
B_ACQ_CTL = ACQIntDisableMask;
CAN_STDBY(STANDBYMODE);

PCREnterSleepMode();

//sleep here

B_WD_CTL = WD_256ms; */
B_WD_CTL = WD_OFF;

B_ACQ_CTL = ACQIntEnableMask;
TsenseEnableExtSensor();
TsenseEnableIntSensor();
CAN_STDBY(NORMALMODE);
DDRA_DDRA7 = 1;
PTA_PTA7 = 1;
}

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mm9z1_638 Sleep Error with current Threshold (d2d Error)

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