Question

Write a C program that will output clock signals to port 1 of MSP430. Assume that clock inputs are as follows: ACLK = LFXT1 = 32768, MCLK = DCO Max, SMCLK = XT2

Answer 1

Solution:

code:

#include <msp430x14x.h>

void main(void)

{

// WDT 250ms, ACLK, interval timer

WDTCTL = WDT_ADLY_250;

IE1 |= WDTIE; // Enable WDT

interrupt

P1DIR |= 0x01; // Set P1.0 to

output direction

// Enter LPM3 w/interrupt

_BIS_SR(LPM3_bits + GIE);

}

// Watchdog Timer i

nterrupt service

routine

interrupt[WDT_TIMER] void

watchdog_timer(void)

{

P1OUT ^= 0x01;

// Toggle P1.0

using exclusive-OR

}

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