MSP430FR2476: MSP430FR2476

Hi Hithesh,

The details can be found in the MSP430FR4xx_2xx users guide, section 8.2, but essentially you want to setup P2.1 as follows:

int main(void)
{
	WDTCTL = WDTPW | WDTHOLD;	// stop watchdog timer
	
	// Set pin as GPIO
	P2SEL0 &= ~BIT1;
	P2SEL1 &= ~BIT1;

	// Set direction = input
	P2DIR &= ~BIT1;

	// If interrupt to occur on high to low transition
	P2IES |= BIT1;

	// OR

	// else interrupt to occur on low to high transition
	P2IES &= ~BIT1;

	// Enable pin interrupt
	P2IE |= BIT1;
	
    PM5CTL0 &= ~LOCKLPM5;

	return 0;
}

Hi Dennis,

Thanks for the reply, is this enough to enable Schmitt trigger.

Any Hardware configuration required to enable schmitt trigger?

Yes.  The Schmitt trigger is enabled when the pin is configured as an input.  There is no additional configuration required beyond what is shown above.