lampeggiatore.c

#include "msp430.h"

/*
* Piedinatura
* 1.6 -> uscita PWM PP1
* 2.1 -> uscita PWM PP2
* 2.2 -> uscita PWM continua
* 1.0 -> uscita led lampeggiante in sync con 1.6
*/

/*
* DEFINE LED PORT & PIN
*/
#define LED_PDIR	P1DIR
#define LED_POUT	P1OUT
#define LED_PIN	    BIT0

void blinkDelay()
{

    //Configure the LED
    LED_PDIR |= LED_PIN;	//Set P1.0 as an Output pin
    LED_POUT &= ~LED_PIN;	//Set P1.0 LOW (turn LED off)

    //Infinite loop to blink the LED
    while (1)
    {
        LED_POUT ^= LED_PIN;	//Toggle the LED, using XOR operator'
        P2DIR ^= BIT1;
        P1DIR ^= BIT6;

        //Delay for 100000 cycles – the CPU is occupied during this
        __delay_cycles(574555); // 1 sec

    }
}

void main(void)
{
 WDTCTL = WDTPW + WDTHOLD;  // Stop WDT

 P1DIR |= ~BIT6;             // P1.6 to output (bitwise OR it will make it a 1)
 P1SEL |= BIT6;             // P1.6 to TA0.1
 P1SEL2 &= ~BIT6;             // P1.6 to TA0.1 (it will make it a 0)

 P2DIR |= BIT1;             // P1.6 to output (bitwise OR it will make it a 1)
 P2SEL |= BIT1;             // P1.6 to TA0.1
 P2SEL2 &= ~BIT1;             // P1.6 to TA0.1 (it will make it a 0)

 P2DIR |= BIT2;             // P1.6 to output (bitwise OR it will make it a 1)
 P2SEL |= BIT2;             // P1.6 to TA0.1
 P2SEL2 &= ~BIT2;             // P1.6 to TA0.1 (it will make it a 0)

 TA0CCR0 = 20; // Set maximum count value (PWM Period
 TA0CCTL1 = OUTMOD_7; // set output on counter reset, clear output on CCR1
 TA0CCR1 = 3; // initialise counter compare value
 TA0CTL = TASSEL_2 + MC_1; // Use the SMCLK to clock the counter and set to count up mode

 TA1CCR0 = 20; // Set maximum count value (PWM Period
 TA1CCTL1 = OUTMOD_7; // set output on counter reset, clear output on CCR1
 TA1CCR1 = 17; // initialise counter compare value
 TA1CTL = TASSEL_2 + MC_1; // Use the SMCLK to clock the counter and set to count up mode

 blinkDelay();

 _BIS_SR(LPM0_bits); // Enter LPM0

}