有关郭天祥MSP430教程源码-HFXT实验程序设计。

#include <msp430x14x.h>
#include "BoardConfig.h"

void main(void)
{
volatile unsigned int i;

BoardConfig(0xb8);
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P5DIR |= 0x10; // P5.4= output direction
P5SEL |= 0x10; // P5.4= MCLK option select
BCSCTL1 &= ~XT2OFF; // XT2= HF XTAL

do
{
IFG1 &= ~OFIFG; // Clear OSCFault flag
for (i = 0xFF; i > 0; i--); // Time for flag to set
}
while ((IFG1 & OFIFG)); // OSCFault flag still set?

BCSCTL2 |= SELM_2; // MCLK= XT2 (safe)

for (;;); // Do nothing
}