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1、avr单片机的数码管显示时钟设计/数码管数据P0口，数码管控制P2口#include#include#includePACe.h#include#include#definecodePROGMEM#defineucharunsignedchar#defineuintunsignedintcodeconstucharLED_716=0x28，0x7E，0xA2，0x62，0x74，0x61，0x21，0x7A，0x20，0x60，0xff;/commonof+codeconstucharposition8=0x7f，0xbf，0xdf，0xef，0xf7，0xfb，0xfd，0xfe;uchar
2、TIme4;/时间计数volaTIleuchardisp_buff8;/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;time0=00;/1/10sect
3、ime1=30;/sectime2=59;/minutetime3=23;/hourtime_to_dispbuff（）;time1_init（）;sei（）;while（1）if（time_10ms_ok）time_10ms_ok=0;if（+time0=100）time0=0;point_on=point_on;if（+time1=60）time1=0;if（+time2=60）time2=0;if（+time3=24）time3=0;time_to_dispbuff（）;voidtime0_init（void）TCCR0=0x05;TCNT0=0xea;TIFR|=0x02;TIMSK|
4、=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（if（point_onPORTC=pgm_read_byte（if（+posit=8）posit=0;voidtime_to_dispbuff（void）uchari，j=0;for（i=0;i=3;i+）disp_buffj+=timei%10;disp_buffj+=timei/10;