#include "STC15Fxxxx.H"
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit pwm=P3^5;
unsigned char n,count,jd;
void timer0Init() //500us 11.0592
{
AUXR |= 0x80; //1T
TMOD &= 0xf0;
TL0 = 0x66 ;
TH0 = 0xEA;
TF0 = 0;
TR0 = 1;
INT_CLKO = 0x01;
ET0 = 1;
EA = 1;
}
void main(void)
{
P0M1 = 0; P0M0 = 0;
P1M1 = 0; P1M0 = 0;
P2M1 = 0; P2M0 = 0;
P3M1 = 0; P3M0 = 0;
P4M1 = 0; P4M0 = 0;
P5M1 = 0; P5M0 = 0;
P6M1 = 0; P6M0 = 0;
P7M1 = 0; P7M0 = 0;
jd=3;//归正
count=0;
timer0Init();
}
void INT0_int (void) interrupt INT0_VECTOR
{
}
void INT1_int (void) interrupt INT1_VECTOR
{
}
void timer0(void) interrupt 1
{
TL0 = 0x66;
TH0 = 0xEA;
if(count<jd)
pwm=1;
else pwm=0;
count=(count+1);//0.5ms 的次数
count=count%40;// 20ms周期
}
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