合泰单片机HT66F3195 定时器PWM例程

#include "HT66F3195.h" //定时器定时时间计算 //时间=1/(定时器时钟/CCAP) #define LED1 _pa3 volatile unsigned int _500mscnt = 0; volatile unsigned char _500msflag = 0; void main() { _wdtc = 0xa8; //关闭看门狗 _hircc = 0x09; //使能HIRC 并选择16MHz while(!_hircf); //等待时钟稳定 //初始化LED1 _pac3 = 0; //PTM初始化 定时2mS(500Hz) _ptmc0 = 0x38; //Fptm = 16MHz/64=250K _ptmc1 = 0xc1; _ptmal = 0xF4; //500Hz = 250K/500 _ptmah = 0x01; _ptmae = 1; //使能PTM中断 _mf1e = 1; //使能外设中断 _emi = 1; //使能总中断 while(1) { if(_500msflag) { LED1 = 1; }else { LED1 = 0; } } } //PTM中断服务函数 void __attribute((interrupt(0x10))) PTM_ISR(void) { if(_ptmaf) { _ptmaf = 0; _500mscnt ++; if(_500mscnt >= 250) { _500mscnt = 0; if(_500msflag)_500msflag = 0; else _500msflag = 1; } } }