em78p372n_pwm2.c

来自「义隆EM78P372N资料」· C语言 代码 · 共 31 行

//**********************************************************************
//PWM2 输出1KHz的方波，占空比为50%
//**********************************************************************
//MCU:EM78P372N
//Oscillator:IRC 4MHz
//Clock:2
//WDT: Disable
//编译软件:eUIDE version 1.02.09.07

#include "EM78P372N.H"       //EM78P372N的头文件
#define DISI()  _asm{disi}
#define WDTC()  _asm{wdtc}
#define NOP()   _asm{nop}
#define ENI()   _asm{eni}
#define SLEP()   _asm{slep}
#define uchar  unsigned char
extern int IntVecIdx; //occupied 0x10:rpage 0
void main()
{
	WDTC();
	DISI();
	SCR=0X7F;			//选择4MHz,TIMER 选择主频
	P5CR=0;
	TMRCON=0X20;		//预分频比设为1：16
	PWMCON=0X02;		//使能PWM2
	PRD2=249;			//周期=1/4*(249+1)*16=1ms
	DT2=125;
	T2EN=1;				//PWM2定时开始
	while(1);
}