#include <REGX52.H>
#include "Delay.h"
#include "Key.h"
#include "Nixie.h"
#include "Timer0.h"
sbit Motor=P1^0;
unsigned char Counter,Compare; //計數值和比較值，用于輸出PWM
unsigned char KeyNum,Speed;
void main()
{
Timer0_Init();
while(1)
{
KeyNum=Key();
if(KeyNum==1)
{
Speed++;
Speed%=4;
if(Speed==0){Compare=0;} //設置比較值，改變PWM占空比
if(Speed==1){Compare=50;}
if(Speed==2){Compare=75;}
if(Speed==3){Compare=100;}
}
Nixie(1,Speed);
}
}
void Timer0_Routine() interrupt 1
{
TL0 = 0x9C; //設置定時初值
TH0 = 0xFF; //設置定時初值
Counter++;
Counter%=100; //計數值變化范圍限制在0~99
if(Counter<Compare) //計數值小于比較值
{
Motor=1; //輸出1
}
else //計數值大于比較值
{
Motor=0; //輸出0
}
}
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