本资料为AVR系列单片机竞赛设计实例程序22例PROTEUS仿真资料-M16_T1_Compare程序及仿真。

#include<iom16v.h>
#define uchar unsigned char
#define uint unsigned int

uchar Table[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar Data[4]={0,0,0,1};
uchar Key1,Key2,Key3;

void DelayMs(uchar i)
{
uchar j;
for(;i!=0;i++)
{
for(j=10;j!=0;j--);
}
}

void Display(uchar *p)
{
uchar i,sel=0x01;
for(i=0;i<4;i++)
{
PORTC=sel;
PORTA=0xff-Table[p[i]];
DelayMs(2);
sel=sel<<1;
}
}

void Key_Process(uchar *p)
{
while((PINB&0x01)==0){Display(Data);Key1=1;}
while((PINB&0x02)==0){Display(Data);Key2=1;}
while((PINB&0x04)==0){Display(Data);Key3=1;}
if(Key1==1)
{
p[3]++;
if(p[3]==10) p[3]=0;
Key1=0;
}
if(Key2==1)
{
p[2]++;
if(p[2]==10) p[2]=0;
Key2=0;
}
if(Key3==1)
{
p[1]++;
if(p[1]==10) p[1]=0;
Key3=0;
}
}

void Set_Process(void)
{
uint i,j;
i=Data[0]*1000+Data[1]*100+Data[2]*10+Data[3];
j=500/i;
OCR1AH=j>>8;
OCR1AL=j&0x00ff;
}

void Init_IO(void)
{
DDRA=0xff;
PORTA=0xff;
DDRC=0xff;
PORTC=0xff;
DDRB=0x00;
PORTB=0x00;
DDRD=0xff;
PORTD=0xff;
}

void Init_Timer1(void)
{
TIMSK=TIMSK|0x10;
TCCR1B=0x0a;
TCNT1H=0x00;
TCNT1L=0x00;
Set_Process();
SREG=SREG|0x80;
}

void main(void)
{
Init_IO();
Init_Timer1();
DelayMs(50);
while(1)
{
Key_Process(Data);
Set_Process();
Display(Data);
}
}

#pragma interrupt_handler Compare:7
void Compare(void)
{PORTD=~PORTD;}