计数器89C51（C语言版）
计数器
1
#include<absacc.h>
2#include<reg51.h>
3#define COM XBYTE[0xa001]
4#define DAT XBYTE[0xa000]
5void display();
6unsigned char disbuf[6],hour=0,min=0,sec=0;
7
unsigned char code led[]=
{0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80} ;
8void int_to() interrupt 1
9{
10
TL0=60536%256;
11 TH0=60536/256;
12
13
14 if(++sec==100)
15
{
16 sec=0;
17 if(++min==60)
18 {
19 min=0;
20 if(++hour==60)
21 {
22 hour=0;
23
}
24 }
25 }
26 display();
27
}
28void init8279()
29{
30 COM=0;
31 COM=0x32;
32 COM=0xdf;
33 while(COM&0x80);
34}
35void display()
36{
37unsigned char data dd,i,comm=0x80;
38disbuf[0]=hour/10;
39disbuf[1]=hour%10;
40disbuf[2]=min/10;
41disbuf[3]=min%10;
42disbuf[4]=sec/10;
43disbuf[5]=sec%10;
44for(i=0;i<6;i++)
45{
46COM=comm++;
47dd=disbuf[i];
48DAT=led[dd];
49}
50}
51void int_ex0() interrupt 0
52{
53TR0=~TR0;
54}
55void int_ex1() interrupt 2
56{
57int i;
58for(i=0;i<6;i++)
59disbuf[i]=0;
60}
61 void main()
62 {
63 TMOD=0x01;
64 TH0=60536/256;
65 TL0=60536%256;
66 TR0=1;
67 ET0=1;
68 EX0=1;
69 EX1=1;
70 EA=1;
71
72 init8279();
73 while(1);
74 {
75 display();
76 }
77}
78
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
版权声明：本文为jhlishero原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。