51单片机定时器计数，通过两个74HC573锁存器控制

#include <reg52.h> #define uint unsigned int #define uchar unsigned char uchar code table[] = { 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71 }; uchar table2[] = { 0xfe,0xfd,0xfb, 0xf7,0xef,0xdf }; uchar num, num2, num3, shi, ge; sbit dula = P2^6; sbit wela = P2^7; sbit led1 = P1^0; void delayms(uint xms){ uint i, j; for(i = xms; i > 0; i--) for(j = 110; j > 0; j--); } void SEG7_MPX6_CC(){ while(1){ for(num = 1; num < 7; num++){ P0 = 0; dula = 1; P0 = table[num]; dula = 0; P0 = 0xff; wela = 1; P0 = table2[num-1]; wela = 0; delayms(10); } } } display(uchar shi, uchar ge){ P0 = 0; dula = 1; P0 = table[shi]; dula = 0; P0 = 0xff; wela = 1; P0 = table2[0]; wela = 0; delayms(10); P0 = 0; dula = 1; P0 = table[ge]; dula = 0; P0 = 0xff; wela = 1; P0 = table2[1]; wela = 0; delayms(10); } void start_time(){ TMOD = 0x11; TH0 = (65536 - 45872)/256; TL0 = (65536 - 45872)%256; TH1 = (65536 - 45872)/256; TL1 = (65536 - 45872)%256; EA = 1; ET0 = 1; ET1 = 1; TR0 = 1; TR1 = 1; while(1){ display(shi, ge); } } void T0_time() interrupt 1 { TH0 = (65536 - 45872)/256; TL0 = (65536 - 45872)%256; num++; if(num == 4){ num = 0; led1 = ~led1; } } void T1_time() interrupt 3 { TH1 = (65536 - 45872)/256; TL1 = (65536 - 45872)%256; num2++; if(num2 == 20){ num2 = 0; num3++; if(num3 == 60) num3 == 0; shi = num3 / 10; ge = num3 % 10; } } int main(){ start_time(); }