LAUNCHXL-CC2640R2: access comparators

David Wood

Are there any examples out there of how to access and use the comparators on the LAUNCHXL-CC2640R2? I have read the technical documents and looked at the CC2640R2-LAUNCHXL.c file in driver examples and cannot make sense of how to access the comparators. I was only able to find data on COMPB, there is a way to access COMPA?

over 5 years ago

0 Sai Reddy over 5 years ago

TI__Mastermind 22560 points

Hello David,

Apologize for the delay! I have asked my colleague to look into this. Give us couple of days time to get back as Monday is a holiday.

Thanks,

Sai

0 FI over 5 years ago in reply to Sai Reddy

TI__Mastermind 20570 points

Hi,

Here is a low-level driver for Comp-A (interrupt driven). You can find the documentation for APIs and register fields here:

http://dev.ti.com/tirex/explore/node?node=ACPe.y.AhNA4diU86GpL3w__krol.2c__LATEST

Interrupt callback:

void AUXCompAIntHandler(void){

//
// Clear the interrupt
HWREG(AUX_EVCTL_BASE + EVTOMCUFLAGSCLR) |= AUX_COMPA;
//
// Set an interrupt flag to indicate an interrupt has occurred.
//
g_bGPIOIntFlag = true;
}

CompA_setup(void){

//
// Turn on clock for AUX_ADI and SOC_AUXCTRL
//
// Enable clock for required AUX modules

AUXWUCClockEnable(AUX_WUC_MODCLKEN0_AUX_ADI4_M);

// this will not allow latching
HWREG(AUX_WUC_BASE + AUX_WUC_O_AUXIOLATCH) = AUX_WUC_AUXIOLATCH_EN_TRANSP;

// Enable COMPA
//
HWREG(AUX_ADI4_BASE + ADI_4_AUX_O_COMP) = ADI_4_AUX_COMP_COMPA_EN;
//
// Connect external reference and input to COMPA
//

HapiSelectCompARef(COMPA_IN_AUXIO2); //reference - DIO28
HapiSelectCompAInput(COMPA_IN_AUXIO1); //input - DIO29

IntEnable(INT_AUX_COMPA); // enable interrupt

}

0 David Wood over 5 years ago in reply to FI

Intellectual 360 points

Thank you for the driver. I'm having trouble figuring out what drivers to add. Whenever I find drivers to add, I get sucked down a black hole of additional drivers to add.

0 FI over 5 years ago in reply to David Wood

TI__Mastermind 20570 points

Hi,

I think it would be best to add and build the entire driverlib to the project.

Are you using an example from SDK and adding CompA to it?

Thanks,

0 FI over 5 years ago in reply to David Wood

TI__Mastermind 20570 points

I forgot to mention. Have you tried using Sensor Controller Stuido to configure and use CompA?

Please see the link here: http://www.ti.com/tool/SENSOR-CONTROLLER-STUDIO

You will find code examples inside the Code Language Reference.

Thanks

Bluetooth®︎

Bluetooth forum

LAUNCHXL-CC2640R2: access comparators