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LPC 18xx Brown Out Help

Question asked by Jake Weiner on Nov 28, 2016
Latest reply on Dec 16, 2016 by Carlos_Mendoza

Hi all,

 

I'm quite new to brownouts and at work I am required to implement a feature to detect if our LPC1837 device falls below a certain threshold on startup. I was just wondering if this would be the correct way to implement such a feature

 

// Set BOD Threshhold //

if (detect>=0 && detect<=3){

   LPC_CREG->CREG0 &= ~(3<<8);
   LPC_CREG->CREG0 |= detect<<8;

}

 

Chip_EVRT_Init();
Chip_EVRT_ConfigIntSrcActiveType(EVRT_SRC_BOD1,EVRT_SRC_ACTIVE_FALLING_EDGE); // now im not sure exactly which option to select here, I figured i want to detect the falling edge?
Chip_EVRT_SetUpIntSrc(EVRT_SRC_BOD1,ENABLE);
NVIC_EnableIRQ(EVENTROUTER_IRQn);

 

Now the problem that I am having is that despite clearing the event status with

LPC_EVRT->CLR_STAT &= (0x01UL<<EVRT_SRC_BOD1);;

 

I am stuck in my event handler routine. Just wondering if this would be a problem with my chip (I cant measure the internal voltages) or, more likely, something wrong with my code.

Any help would be greatly appreciated.

Thanks in advance,

 

Jake

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