Set the RST/NMI pin to NMI mode, turn on the P1.0 LED in the main program, and turn off the LED in the NMI interrupt
. The phenomenon is that when the RST button is pressed, the LED goes out and never lights up again (unless the power is turned on again).
#include "MSP430G2553.h"
void main( void )
{
WDTCTL = WDTPW + WDTHOLD + WDTNMI; //NMI mode (non-Reset mode)
IE1=NMIIE; //Open NMI interrupt, no need to open general interrupt
P1DIR |= BIT0; //P1.0 is set as output port
P1OUT |= BIT0; //light up
LPM3; //Enter LPM3
}
//==========NMI interrupt service subfunction==============
#pragma vector=NMI_VECTOR
__interrupt void NMI_ISR(void) //non-maskable interrupt
{
P1OUT &= ~BIT0; //Turn off the light
}
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