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#include <msp430.h> // Include MSP430-specific defines
int main(void) {
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
P1OUT &= ~BIT0; // Clear P1.0's output value
P1DIR |= BIT0; // Set P1.0 as an output
for (;;) {
P1OUT ^= BIT0; // Toggle P1.0 using bitwise XOR
__delay_cycles(100001000000); // Software delay
}
return 0;
} |
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This function delays the processor for x cycles (10,000 in our case). In our case, we chose 1,000,000 because MCLK runs at 1Mhz by default so it should be around 1 second of delay. So, in our loop, we toggle the state of the LED (if it's on, it turns off, and if it's off, it turns on) and then we wait for a little bit. This creates the effect of the LED blinking.
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#include <msp430.h>
/*
* main.c
*/
int main(void) {
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
P1OUT &= ~BIT0;
P1DIR |= BIT0;
TACTL |= TASSEL_2 | MC_2 | ID_3;
TACCTL0 |= CCIE;
TACCR0 = 65535;
__enable_interrupt();
for (;;) { }
return 0;
}
#pragma vector = PORT1TIMERA0_VECTOR
__interrupt void PORT1_ISR(void) {
P1OUT ^= BIT0;
} |
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