Part Number: MSP430FR6989
In the code below, I wish to use one of the onboard switches to toggle the direction and output of P2.0. Commented out sections are things I've tried
The issue is that when I press the onboard switch, an LED I'm driving with P2.0 will turn off, but only so long as I press the switch. This is not consistent with the desire to toggle the switch. In debug mode, the ISR does not seem to get called at all.
I can only assume I've configured something incorrectly, but I'm unsure what I haven't done. In a different program, pressing switch 1 using initialization code properly resets a matrix. That code I've included below as well.
#include <msp430.h>
//MAIN
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
PM5CTL0 &= ~LOCKLPM5; //unlock power management
P1DIR &= ~BIT1;
P1REN |= BIT1;
P1OUT |= BIT1;
P1IES |= BIT1;
P1IFG &= ~BIT1;
P1IE |= BIT1;
P2DIR |= BIT0;
P2OUT |= BIT0;
__enable_interrupt();
while(1)
{
__low_power_mode_3();
}
return 0;
}
/*Button Interrupt*/
#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
if(P1IFG & BIT1){
P2DIR ^= BIT0;
P2OUT ^= BIT0;
}
P1IFG &= ~BIT1;
__low_power_mode_off_on_exit();
/* switch(__even_in_range(P1IV,P1IV_P1IFG7))
{
case P1IV_NONE: break; // Vector 0: no interrupt
case P1IV_P1IFG0: break; // Vector 2: P2.0
case P1IV_P1IFG1://BIT
P1IE &= ~BIT1;//disable interrupts
P1IFG &= ~BIT1;//clear flags
P2DIR ^= BIT0;//toggle
P2OUT ^= BIT0;
break;
case P1IV_P1IFG2: break;
case P1IV_P1IFG3: break;
case P1IV_P1IFG4: break;
case P1IV_P1IFG5: break; // Vector 12: P2.5
case P1IV_P1IFG6: break; // Vector 14: P2.6
case P1IV_P1IFG7: break; // Vector 16: P2.7
default: break;
}*/
/*if(P1IFG & BIT1)//If button 1 caused interrupt
{
P2DIR ^= BIT0;
P2OUT ^= BIT0;
P1IFG &= ~BIT1;
//__low_power_mode_off_on_exit();//re-enable this after selecting low power mode?
}*/
//END INTERRUPT BRACKET
}
And the second bit of code:
#include <msp430.h>
#define BUTTON1 BIT1
//Globals
unsigned int matrix[5] = {0,0,0,0,0};
//===============MAIN================
int main(void) {
//volatile unsigned int i;
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
P1DIR &= ~BUTTON1; // input
P1OUT |= BUTTON1; // give pullup/down resistor a '1' so it pulls up
P1REN |= BUTTON1; // enable pullup/down
PM5CTL0 &= ~LOCKLPM5; // Unlock ports from power manager, causes interrupts!
P1IES |= BUTTON1; // Interrupt on falling edge
P1IFG &= ~BUTTON1; // clear interrupt flag
P1IE |= BUTTON1; // enable interrupt
__enable_interrupt();
while(1) // continuous loop
{
__low_power_mode_3(); // going to sleep but keep ACLK running
}
return 0;
}
//=======================INTERRUPTS============================
// Interrupt Service Routine for Port 1
#pragma vector=PORT1_VECTOR // associate funct. w/ interrupt vector
__interrupt void Port_1(void) // name of ISR
{
if(P1IFG & BUTTON1){ // button 1 caused interrupt
//count = 0;
matrix[0] = 0;
matrix[1] = 0;
matrix[2] = 0;
matrix[3] = 0;
matrix[4] = 0;
P1IFG &= ~BUTTON1; // clear interrupt flag of P1 BUTTON1
__low_power_mode_off_on_exit();
}
}
