智能车制作

标题: 程序求解 [打印本页]

作者: 欲驰 时间: 2011-12-1 16:47
标题: 程序求解
我是新手，对下面的程序不是很明白，求各位前辈精讲一下，谢谢！

#include <hidef.h>    /* common defines and macros */
#include <MC9S12XS128.h>    /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12xs128"

void PLLInit(void)
{
SYNR=0XC5;
REFDV=0XC1;
while(CRGFLG_LOCK==0);
CLKSEL_PLLSEL=1;

}
void delay(int t)
{ int i,j;
  //i=t;
  for(i=t;i>0;i--)
  {
j=0x1300;
while(j--);
  }
}
void PWMInit(void)
{
PWME=0x00;
PWMCTL_CON01=1;
PWMPRCLK=0X00;
PWMSCLA=0X00;
PWMSCLB=0X00;

PWMCLK=0X0FF;
PWMPOL=0X0FF;
PWMCAE=0X00;
PWMPER01=2000;
PWMDTY01=110;
PWME=0X0FF;
}

void main(void) {
  /* put your own code here */
  EnableInterrupts;
PLLInit();
PWMInit();
delay(1000);
for(;;)
{
PWMDTY01=153;
delay(8000);
PWMDTY01=110;
delay(8000);
PWMDTY01=77;
delay(8000);
PWMDTY01=110;
delay(8000);

} /* wait forever */
  /* please make sure that you never leave this function */
}

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