/* 
 * www.microDigitalEd.com 
 *
 * p2_4.c Cycle through all color combinations of the tri-color LEDs. 
 * The red LED is connected to P2.0.
 * The green LED is connected to P2.1.
 * The blue LED is connected to P2.2.
 * The LEDs are high active (a '1' turns ON the LED).
 *
 * Tested with Keil 5.20 and MSP432 Device Family Pack V2.2.0.
 */

#include "msp.h"

void delayMs(int n);

int main(void) {
    int counter = 0;

    P2->SEL1 &= ~7;         /* configure P2.2-P2.0 as simple I/O */
    P2->SEL0 &= ~7;

    P2->DIR |= 7;           /* P2.2-2.0 set as output */

    while (1) {
        /* turn on/off the tri-color LEDs by the least significant three bits of the counter */
        P2->OUT = counter & 7;
        delayMs(500);
        counter++;          /* increment counter */
    }
}

/* delay milliseconds when system clock is at 3 MHz */
void delayMs(int n) {
    int i, j;

    for (j = 0; j < n; j++)
        for (i = 250; i > 0; i--);      /* Delay */
}