Hai,
i am trying to interface external pushbutton to MSP430launchpad to switch on and off launch pad LED. when i am pressing my pushbutton, the main program has to jump to ISR and make the LED ON/OFF but when i pressing push button it is not jumping to ISR. Why..??
This is my code:
#include "msp430g2553.h"
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop Watchdog Timer
P1DIR |= BIT0; // P1.0 as Output
P1DIR &=~ BIT4;
P1IE |= BIT4; // P1.4 Interrupt Enable
P1IES |= BIT4; // Interrupt Edge Select (High to Low)
P1REN |= BIT4; // Resistor Enable
P1OUT |= BIT4; // Pull Up Resistor at 1.4
P1IFG = 0; // Clear Interrupt
_bis_SR_register (GIE); // Enable General Interrput bit
while (1);
}
#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
P1OUT ^= BIT0; // Toggle LED
P1IFG = 0; // Clear the interrupt
}
external pushbutton connection.
