Hi
I am trying to use the analog comparator (COMPA) to trigger interrupts. That works fine in the code shown below, but my problem is to clear interrupts.
I have figured out how to clear the interrupt by using: IntPendClear(INT_AUX_COMPA);
However, that doesn't seem to stop the COMPA from interrupting when the input signal gets below the reference signal again.
I have tested by modifying the PIN_Interrupt project, running it on SensorTag (cc2650). I am setting up COMPA to take input from AUXIO5 and using 1.2V as reference. I also register for callback, and enables the interrupt. This works fine:
AUXWUCClockEnable(AUX_WUC_MODCLKEN0_SOC_M|AUX_WUC_MODCLKEN0_AUX_ADI4_M);
HapiSelectCompAInput(COMPA_IN_AUXIO5);
HapiSelectCompARef(COMPA_REF_VDD1P2V);
HWREGB(AUX_ADI4_BASE + ADI_4_AUX_O_COMP) = ADI_4_AUX_COMP_COMPA_EN; //ADI_4_AUX_COMP_COMPA_EN;
When I rise the voltage above 1.2 V on AUXIO5, that triggers the interrupt and my interrupt service routine is called:
void CompCallback()
{
IntPendClear(INT_AUX_COMPA);
//IOCIntClear(INT_AUX_COMPA);
//IntDisable(INT_AUX_COMPA);
uint32_t currVal= adcSingleAin(ADC_COMPB_IN_AUXIO5);
currVal = PIN_getOutCOMPA putValue(Board_LED1);
PIN_setOutputValue(myLedPinHandle, Board_LED1, !currVal);
//IntEnable(INT_AUX_COMPA);
}
In my service routine I am trying clear the interrupt, so it will not receive interrupts when the signal on AUXIO5 is lowered below 1.2V. As the code now works, COMPA will trigger the interrupt service routine, even when the signal is below the reference. That happens only when the signal has been above 1.2 V. So, it will not be called before the signal goes above 1.2V the first time.
How can I clear from sending interrupts when input signal is below the reference signal?
How can I read the output from COMPA?
How can I get COMPA to be triggered on positive edge?
Best regards Arne
