/* Sound the speaker at 440Hz
 *
 * The speaker is connected to P5.6 - TA2.1.
 * CPU clock 3 MHz.
 *
 * Built and tested with MSP432P401R Rev. C, Keil MDK-ARM v5.24a and MSP432P4xx_DFP v3.1.0
 */

#include "msp.h"

void delayMs(int n);

int main(void) {
    /* initialize Timer_A2.1 to do output compare */
    TIMER_A2->CTL = 0x0211;     /* SMCLK, ID=/1, up mode, TA clear */
    TIMER_A2->EX0 = 0;          /* IDEX = /1 */
    TIMER_A2->CCTL[1] = 0x0060; /* set/reset mode */
    TIMER_A2->CCR[0] = 6817;    /* for 440 */
    TIMER_A2->CCR[1] = 3408;
    
    P5->SEL1 &= ~0x40;          /* configure P5.6 as TA2.1 output */
    P5->SEL0 |= 0x40;
    P5->DIR |= 0x40;
    
    for (;;) {
    }
}