版主能详细说一下吗？我的程序如下，好像没用到中断啊？ #include <hidef.h> /* common defines and macros */
#include <mc9s12dg128.h> /* derivative information */
#include "PLL.h"
#pragma LINK_INFO DERIVATIVE "mc9s12dg128b" void PWM_Init(void); void main(void) {
unsigned int i;
unsigned long j=10000;
/* put your own code here */
DisableInterrupts;
PLL_Init();
Start_PLL();
PWM_Init();
//PWME=0xff; //运行PWM所有通道输出
PWMDTY5=50; //占空比为30%
PWME=0X0; //使能PWM
PWME=0X20;
for (i=0;i<10;i++)
{
PWME=0X20; //使能PWM //PWMCNT5
}
//for(i=0;i<0x64;i++)
//{
////while (j--);
////j=1000;
////while(j--);
////j=10000;
//PWMDTY5=i; //PWMDTYx：PWM占空比寄存器 设置占空比
//PWME=0X20; //使能PWM
//} /* wait forever */
/* please make sure that you never leave this function */
} // 使用PWM5进行控制
void PWM_Init(void)
{
PWME=0x00; //Close PWM
PWMPOL =0X20; //PWMPOL；PWM极性寄存器 0X20 先输出高电平，占空比计数器计数完毕后变为低电平
PWMCLK =0X20; // PWMCLK：PWM时钟选择寄存器 0X20使用SA时钟
PWMPRCLK=0X07; //PWMPRCLK：PWM预分频时钟选择寄存器 时钟A为总线128分频
PWMCAE=0X00; //PWMCAE：PWM剧中对齐允许寄存器 左对齐输出模式
PWMCTL=0X00; //PWMCTL：PWM控制寄存器 非级联方式 单独使用通道5
PWMSCLA=0X05; //PWMSCLA：PWM比例因子寄存器A CLOCKSA=CLOCKA/(2*PWMSCLA)为3kHz
PWMPER5=0x64; // PWMPERx：PWM通道周期寄存器 设定周期
//PWMSCLA = 60;
//PWMPRCLK_PCKB=3; // Clock B= Bus Clock/8
//PWMCTL |=PWMCTL_CON23_MASK;
// PWMPER0 = 100; //0.5ms
// PWMPER1 = 100;
// PWMDTY0=25;
// PWMDTY1=30;
// PWMPER23=60000;
// PWMDTY23=4500; } | 
