msp430 button control LED light-EEWORLD

#include "io430.h"

There are two ways to control the on and off of the LED light.

Method 1: Interrupt function. Method 2: Use if(P4IN&BIT2) to judge.

When writing code, try to follow the steps to avoid wasting a lot of time looking for bugs due to negligence.

int main( void )

{

// Stop watchdog timer to prevent time out reset

WDTCTL = WDTPW + WDTHOLD;

P4DIR |= BIT5;

P4REN |= BIT2;

P4OUT |= BIT2;

P4IES |= BIT2;

P4IFG &= ~BIT2;

P4IE |=BIT2;

__bis_SR_register(LPM4_bits+GIE);

return 0;

}

#pragma vector=PORT4_VECTOR

__interrupt void Port_4(void)

{

//P4OUT &= ~BIT5; //If it is off, it can't light up again.

P4OUT ^= BIT5; //on and off cycle

P4IFG &= ~BIT2;

}

Keywords：msp430 Reference address：msp430 button control LED light

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