p122_s1.c

msp430开发版程序

//例1 设MCLK = XT2,SMCLK = DCOCLK,将MCLK由P5.4输出(MSP430X14X中引脚P5.4和MCLK复用)。P122
//实现上述功能的程序如下：
#include<msp430x14x.h>
void main(void)
{
  unsigned int i;
  WDTCTL = WDTPW + WDTHOLD; //停止看门狗
  P5DIR |= 0x10; //P5.4输出
  P5SEL |= 0x10; //P5.4用作MCLK输出
  BCSCTL1 &= ~XT2OFF; //XT2失效
  do
  {
  	IFG1 &= ~OFIFG; //清除振荡器失效标志
  	for (i = 0xFF; i>0; i--); //稳定时间	
  }
  while ((IFG1 & OFIFG) != 0);
  BCSCTL2 |= SELM1; //MCLK = XT2
  for (;;);
}