时钟一：51单片机用替换的方法在数码管上显示时钟

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主文件clock.c：

#include <reg52.h>
#include "./delay/delay.h"

#define PORTLEN P0

sbit bit_select = P2^0;
sbit seg_select = P2^1;

unsigned char src[8] = {0x3f,0x3f,0x40,0x3f,0x3f,0x40,0x3f,0x3f};
unsigned char qrc[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char second1[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void main()
{

unsigned char i;
unsigned char j = 0;

unsigned char k = 0;

  unsigned char l = 0;
  unsigned char m = 0;
  unsigned char n = 0;
unsigned char q = 0;
unsigned char num = 0;
unsigned char count = 0;

while(1)
{

for(i = 0; i < 8; i++)
{
PORTLEN = src[i];
seg_select = 1;
seg_select = 0;

  PORTLEN = qrc[i];
bit_select = 1;
bit_select = 0;

delay_ms(2);
}

count++;

if(count == 65)
{
j++;
  count = 0;
  if(j == 10)
  {
k++;
j = 0;
if(k == 6)
{
  l++;
  k = 0;
  if(l == 10)
  {
m++;
l = 0;
if(m == 6)
{
  n++;
  m = 0;
  if(n == 10)
  {
q++;

n = 0;
src[0] = second1[q];
  }
  if(n == 4)
  {
num++;
if(num == 3)
{

src[7] = second1[0];

src[6] = second1[0];
src[4] = second1[0];
src[3] = second1[0];
src[1] = second1[0];
src[0] = second1[0];
n = 0;
q = 0;
num =0;
continue;
}

  }
  src[1] = second1[n];
}
src[3] = second1[m];
  }
  src[4] = second1[l];
}
src[6] = second1[k];
  }
   src[7] = second1[j];
}

}
}

延时函数delay.c

void delay_us(unsigned char t)
{
while(--t);
}

void delay_ms(unsigned char t)
{
while(t--)
{
delay_us(245);
delay_us(245);
}
}

包含声明头文件delay.h

#ifndef _DELAY_H_
#define _DELAY_H_

extern void delay_us(unsigned char t);
extern void delay_ms(unsigned char t);

#endif

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