Pulse Counter using MSP430F2274

[mrinverter 0]

Hi guys, I am trying to implement a pulse counter that counts square wave at around 1-2Hz. The input is at pin 34. I am running WDT interval to function as a clock so that i can use the results to count the interval between the pulses. However, the counter I put into the WDT vector does not count up, but the LED at pin 32 does light, which I am using to check if it enters the interrupt. I was wondering if anyone can provide any assistance with this.

 

#include <msp430.h>

volatile unsigned int count;
volatile unsigned int beat_count;
void InitializeSqWaveInput(void);
char string[7];

/*
 * main.c
 */
int main(void) {

	//HW Setup

	BCSCTL1 = CALBC1_8MHZ;				//Set DCO to 8Mhz
	DCOCTL = CALDCO_8MHZ;				//Set DCO to 8Mhz

	WDTCTL = WDTPW + WDTCNTCL + WDTTMSEL + WDTSSEL + WDTIS1;
	//WDT SMCLK, Divider (0.064ms WDT Interval Interrupt)

	IFG1 = ~WDTIFG; // Clear the WDT interrupt flags
	IE1 = WDTIE; // Enable the WDT interrupts

	P1SEL = 0; //Set Port 1 to GPIO

	P1DIR = BIT1 | BIT2; // Set the LEDs on P1.2 as outputs (For Debugging SQ Wave)

	InitializeSqWaveInput();
}

void InitializeSqWaveInput(void) {
	P1DIR = ~BIT3; // Set sqwave pin as an input pin
	P1IES ^= BIT3; // Enable Interrupt to trigger on the rising edge (low to high)
	P1IFG = ~BIT3; // Clear the interrupt flag for the input
	P1IE = BIT3; // Enable interrupts on port 1 for the input
}

#pragma vector=PORT1_VECTOR
__interrupt void PORT1_ISR(void) {
	if (P1IES & BIT3) { //Falling edge detected

	} else { // Rising edge detected
		P1OUT ^= BIT2; // Turn on P1.2 red LED to indicate Rising Edge Detected
		beat_count = count; //Transfer interrupt count to beat_count
		//count = 0; //Reset interrupt count for next beat
		//15625/beat_count = timeperbeat;
		WDTCTL = WDTPW + WDTCNTCL + WDTTMSEL + WDTSSEL + WDTIS1;
	}
}
#pragma vector=WDT_VECTOR
__interrupt void WDT_ISR(void) {
	if (P1IES & BIT3) { //Falling edge detected

		} else { // Rising edge detected
			P1OUT ^= BIT2; // Turn on P1.2 red LED to indicate Rising Edge Detected
			beat_count = count; //Transfer interrupt count to beat_count
			//count = 0; //Reset interrupt count for next beat
			//15625/beat_count = timeperbeat;
			WDTCTL = WDTPW + WDTCNTCL + WDTTMSEL + WDTSSEL + WDTIS1;
		}
	WDTCTL = WDTPW + WDTCNTCL + WDTTMSEL + WDTSSEL + WDTIS1;
	count++;
	P1OUT ^= BIT1;				// Toggle P1.0 using exclusive-OR
}