单片机==数码管用delay函数显示时钟（5）

目的

在数码管上显示时钟

包含的文件

//seg.c
#include <reg52.h>
#include <intrins.h>
#include "delay.h"

#define SEGPORT P0

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

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

void main()
{
      unsigned char i;
      unsigned char j;
      unsigned char sec = 0;
      unsigned char min = 0;
      unsigned char hour = 0;

      while(1)
      {
            for(i = 0; i < 63; i++)
            {
                for(j = 0; j < 8; j++)
                {
                    SEGPORT = 0x0;
                    seg_select = 1;
                    seg_select = 0;
                    SEGPORT = 0xff;
                    bit_select = 1;
                    bit_select = 0;

                    SEGPORT = segdata[j];
                    seg_select = 1;
                    seg_select = 0;

                    SEGPORT = bitdata[j];
                    bit_select = 1;
                    bit_select = 0;

                    delay_ms(2);
                }
         }

         sec++;             
         if(sec < 60)
         {  
            segdata[7] = changedata[sec % 10];
              segdata[6] = changedata[sec / 10];
     }

         else
         {
             segdata[7] = 0x3f;
             segdata[6] = 0x3f;
             sec = 0;
             min++;
         }

         if(min < 60)
         {
                segdata[4] = changedata[min % 10];
                segdata[3] = changedata[min / 10];
         }

         else
         {
                segdata[4] = 0x3f;
              segdata[3] = 0x3f;
              min = 0;
              hour++;
         }

         if(hour < 24)
         {
              segdata[1] = changedata[hour % 10];
              segdata[0] = changedata[hour / 10];
         }

         else
         {
              segdata[1] = 0x3f;
              segdata[0] = 0x3f;
              hour = 0;
         }
     }

}

//delay.c
void delay_us(unsigned char t)
{
    while(--t);
}

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

void delay_s(unsigned char t)
{
    while(t--)
    {
        delay_ms(200);
        delay_ms(200);
        delay_ms(200);
        delay_ms(200);
        delay_ms(200);
    }
}

//delay.h
#ifndef _DELAY_H
#define _DELAY_H

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

#endif