COMPB will not generate interrupt on CC2650

Arne,

Line 20 / 21 seems to be incorrect. You do a &= with a register that has reset value of 0x0, resulting in a 0 being written in.
Also line 22 seems incorrect. In C, the function name is a pointer itself so you are providing a pointer to a pointer in your code.

Regards,
Svend

Hi Svend
Of, course. Your right. I changed to |= and it worked like a charm.
Can you elaborate on the TI RTOS Hwi module. Could you please tell me in more detail what I ought to do.

Regards Arne

You can see how it is used in the SYS/BIOS user guide chapter 3.3.1:
www.ti.com/.../spruex3o.pdf

In our software examples we typically construct them dynamically using Hwi_construct instead of _create to have the structures static in memory instead of allocated on the RTOS heap.

I also recommend the BLE software developers guide (SWRU393) for a good introduction to TI RTOS constructs.

Regards,
Svend

Hi Svend

Thanks for answer!

Now the comparator COMPB works fine, and I am also able to turn off the status flag from COMPB in my interrupt service routine. (See the interrupt service routine in the code attached).

The problem is that turning off the flag doesn't seem to work when I use it in my BLE app (heartRateService). 

When I modify pintInterrupt (the program that is included for the SensorTag example) everything works fine. If I include the same code into my heartRateService, then the interrupt is coming continuously. I am not able to turn of the COMPB flag.

Is there a simple solution to this problem?

Regards Arne

void CompCallback() {

    // Read comparator
	int compEvent = HWREGB(AUX_EVCTL_BASE + AUX_EVCTL_O_EVSTAT0) & AUX_EVCTL_EVSTAT0_AUX_COMPB;
	
	// Reset compb flag
	HWREGB(AUX_EVCTL_BASE + AUX_EVCTL_O_EVTOMCUFLAGS) &= ~(AUX_EVCTL_EVTOMCUFLAGS_AUX_COMPB);

	//...... some simple calculations

	IntPendClear(INT_AUX_COMBO);
}

Hi Arne,

I checked with the RTOS development team and the INT_AUX_COMBO interrupt is also used by TI RTOS to use the TDC (time-to-digital converter) to calibrate the high-frequency RC oscillator to the correct frequency when you wake up from standby.

This means that the AUX_COMBO interrupt cannot be used by the application from the Cortex M3.
You can instead route the event through a programmable event:

- Enable the event in AUX_EVCTL.EVTOAONFLAGS, use EVTOAONFLAGSCLR to clear it again.
- Route the programmable event to the CPU using e.g. AON_EVENT:EVTOMCUSEL.AON_PROG0_EV
- Register the interrupt using INT_AON_PRG0 instead (interrupt 45)

Regards,
Svend

Hi Svend

Thanks for fast response.

I have tried to follow your guideline, but still I am not able to turn off the interrupt from COMPB (se code below). This didn't work in the modified PinInterrupt context.

Any more suggestions?

Regards Arne

void CompCallback() {

    // Read comparator
	int compEvent = HWREGB(AUX_EVCTL_BASE + AUX_EVCTL_O_EVSTAT0) & AUX_EVCTL_EVSTAT0_AUX_COMPB;
	
	// Reset compb flag
	HWREGB(AUX_EVCTL_BASE + AUX_EVCTL_O_EVTOAONFLAGSCLR) |= AUX_EVCTL_EVTOAONFLAGSCLR_AUX_COMPB;

	//...... some simple calculations

	IntPendClear(INT_AON_PRG0);
}

void Init() {
	// Set ref and input on Comparator
	AUXWUCClockEnable(AUX_WUC_MODCLKEN0_SOC_M | AUX_WUC_MODCLKEN0_AUX_ADI4_M);
	// Enabling the 32kHz clock to comparator B
	DDI32BitsSet(AUX_DDI0_OSC_BASE, DDI_0_OSC_O_ATESTCTL,	DDI_0_OSC_ATESTCTL_SCLK_LF_AUX_EN);

	HapiSelectADCCompBInput(ADC_COMPB_IN_AUXIO7);
	HapiSelectCompBRef(COMPB_REF_VDD1P2V);
	HWREGB(AUX_ADI4_BASE + ADI_4_AUX_O_COMP) |= ADI_4_AUX_COMP_COMPB_EN;
	HWREGB(AUX_ADI4_BASE + ADI_4_AUX_O_COMP) |= ADI_4_AUX_COMP_COMPB_TRIM_DIV2;

	//Enable flag
	HWREGB(AUX_EVCTL_BASE + AUX_EVCTL_O_EVTOMCUFLAGS) |= AUX_EVCTL_EVTOMCUFLAGS_AUX_COMPB;
	//Route programmable event to CPU
	HWREGB(AON_EVENT_BASE + AON_EVENT_O_EVTOMCUSEL) |= AON_EVENT_EVTOMCUSEL_AON_PROG0_EV_AUX_COMPB;
	IntRegister(INT_AON_PRG0, &CompCallback);
	IntEnable(INT_AON_PRG0);
}