/*****************頭文件****************************************/
#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */

/*********************變量和函數定義****************************/
void PWMInit(unsigned int i); 
void Delay_ms(int i);

/*********************主函數************************************/
void main(){
  
    unsigned int  Period;   //PWM周期
    unsigned int  Duty;     //PWM占空比
    
    Period =0x120;//變量初始化  
    PWMInit(Period);//PWM初始化
    Duty = 0x90; 
    EnableInterrupts;        //PWM占空比為0
      
    while(1){  
    
        __RESET_WATCHDOG();
        
        /*if(Duty<Period) //判斷脈寬是否達到周期的長度(占空比為100％)           
            Duty=Duty+1;     //PWM占空比加1
        else{
            
            Delay_ms(1000);
            Duty=0; //占空比達到100％，設置占空比為0％
        }*/
        
        TPM1SC=0X10;       
        
        TPM1C0VH = (Duty>>8);  ////設置PWM脈寬,設置高字節
        TPM1C0VL = Duty;       //設置低字節
        TPM1SC=0X10;        
       
    }
}

/************************PWM初始化設置**************************/

void PWMInit(unsigned int Period)
{    
    unsigned int Temp=Period;
    
    TPM1SC=0X10; //不允許溢出中斷,不啟動計數,分頻因子=4     
    
    TPM1MODH = (Temp>>8); //設置PWM周期    
    TPM1MODL = Period;      
    
    TPM1C0VH = 0x00;//初始化設置PWM脈寬為0
    TPM1C0VL = 0x00;
    
    TPM1C0SC=0X28; //設為PWM模式,不允許輸出比較中斷,輸出低電平，不帶緩沖     
     
  }    

/************************延時函數********************************/
void Delay_ms(int i) {

    int k;
    
    for(k=i;k<i;k--) {
    ;}
}