avr单片机数码管显示时钟

//数码管数据P0口，数码管控制P2口

#include
#include
#includePACe.h>
#include
#include

#definecodePROGMEM
#defineucharunsignedchar
#defineuintunsignedint

codeconstucharLED_7[16]={0x28,0x7E,0xA2,0x62,0x74,0x61,0x21,0x7A,0x20,0x60,0xff};//commonof+

codeconstucharposition[8]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};


uchartime[4];//时间计数
volatileuchardisp_buff[8];//显示缓冲区
volatileuchartime_count=0;

volatileucharpoint_on=0;
volatileucharposit=0;
volatileuchartime_10ms_ok=0;

voidtime_to_dispbuff(void);
voidtime1_init(void);
voidtime0_init(void);
voiddisplay(void);

intmain(void)
{
PORTA=0xff;
DDRA=0xff;
PORTC=0xff;
DDRC=0xff;

time[0]=00;//1/10sec
time[1]=30;//sec
time[2]=59;//minute
time[3]=23;//hour
time_to_dispbuff();

time1_init();
sei();

while(1)
{
if(time_10ms_ok)
{
time_10ms_ok=0;
if(++time[0]>=100)
{
time[0]=0;
point_on=~point_on;
if(++time[1]>=60)
{
time[1]=0;
if(++time[2]>=60)
{
time[2]=0;
if(++time[3]>=24)
{
time[3]=0;
}
}
}
}
time_to_dispbuff();
}
}
}

voidtime0_init(void)
{
TCCR0=0x05;
TCNT0=0xea;
TIFR|=0x02;
TIMSK|=0x02;
}


voidtime1_init(void)
{
TCCR1A=0x00;
TCCR1B=0x01;
TCNT1=0xa99a;
//TCNT1H=0xa9;
//TCNT1L=0x9a;
TIFR|=0x80;
TIMSK|=0x80;
}

SIGNAL(SIG_OVERFLOW1)
{
TCNT1=0xa99a;
display();
if(++time_count>=5)
{
time_10ms_ok=1;
time_count=0;
}
}

voiddisplay(void)
{
PORTC=0xff;
PORTA=pgm_read_byte(&led_7[disp_buff[posit]]);
if(point_on&&((posit==2)||(posit==4)||(posit==6)))PORTA&=0x7f;
PORTC=pgm_read_byte(&position[posit]);
if(++posit>=8)posit=0;
}

voidtime_to_dispbuff(void)
{
uchari,j=0;
for(i=0;i<=3;i++)
{
disp_buff[j++]=time[i]%10;
disp_buff[j++]=time[i]/10;
}
}