📄 clock.lst
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C51 COMPILER V8.02 CLOCK 07/21/2008 17:28:25 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE CLOCK
OBJECT MODULE PLACED IN clock.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE clock.c BROWSE DEBUG OBJECTEXTEND
line level source
1 //时钟实验
2 //功能：第一，二位数码管显示时
3 //三，四位数码管显示分
4 //五，六位数码管显示秒
5 #include <reg52.h>
6 #define const_time 400; //100x5ms=500ms=0.5s
7 unsigned int buff_time; //buffer for storing the counts
8 unsigned char data time;
9 sbit light0 = P1^0; //the light0 bit
10 sbit DAT164 =P0^6; //the bit of HC164's data
11 sbit CLK164 =P0^7; //the bit of HC164's clock
12 sbit onebit=P0^0; //one of the "8bit led"
13 sbit twobit=P0^1;
14 sbit thrbit=P0^2; //one of the "8bit led"
15 sbit foubit=P0^3;
16 sbit fivbit=P0^4; //one of the "8bit led"
17 sbit sixbit=P0^5;
18
19 bit LED_Buffer;
20 unsigned char data wei;
21 unsigned char data hour;
22 unsigned char data min;
23 unsigned char data sec;
24 unsigned char data hour_hi;
25 unsigned char data min_hi;
26 unsigned char data sec_hi;
27 unsigned char data hour_low;
28 unsigned char data min_low;
29 unsigned char data sec_low;
30
31 unsigned char data LED;
32 code unsigned char LEDMAP[] = // define the table of the "8bit led"
33 {
34 0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xA7,0xA1,0x86,0x8E
35 };
36
37 void send164() //the function of send the data to the "74HC164"
38 {
39 1 unsigned char data j;
40 1 for (j = 0; j < 8; j++)
41 1 {
42 2 if (LED & 0x80) DAT164 = 1;
43 2 else DAT164 = 0;
44 2 CLK164 = 1;
45 2 CLK164 = 0;
46 2 LED <<= 1;
47 2 }
48 1 }
49
50 void main()
51 {
52 1 TMOD=0x01; //set the timer's mode
53 1 TH0=(65536-2500)/256; //fill the timer0's higher register
54 1 TL0=(65536-2500)%256; //fill the timer0's lower register
55 1 IE=0x82; //EA=1,IT0=1
C51 COMPILER V8.02 CLOCK 07/21/2008 17:28:25 PAGE 2
56 1 LED_Buffer=0;
57 1 light0=0;
58 1 buff_time=const_time;
59 1 TR0=1; //start the timer!
60 1 hour=0;
61 1 min=0;
62 1 sec=0;
63 1 while(1)
64 1 {
65 2 light0=LED_Buffer;
66 2 }
67 1 }
68
69
70 void T0Int() interrupt 1 using 3
71 {
72 1 TH0=(65536-2500)/256; //fill the timer0's higher register
73 1 TL0=(65536-2500)%256; //fill the timer0's lower register
74 1 buff_time--;
75 1 wei=buff_time%6;
76 1 hour_hi=hour/10;
77 1 hour_low=hour%10;
78 1 min_hi=min/10;
79 1 min_low=min%10;
80 1 sec_hi=sec/10;
81 1 sec_low=sec%10;
82 1
83 1 switch(wei)
84 1 {
85 2 case 5:
86 2 onebit=0;
87 2 twobit=1;
88 2 thrbit=1;
89 2 foubit=1;
90 2 fivbit=1;
91 2 sixbit=1;
92 2 LED=LEDMAP[hour_hi];
93 2 send164();
94 2 break;
95 2
96 2 case 4:
97 2 onebit=1;
98 2 twobit=0;
99 2 thrbit=1;
100 2 foubit=1;
101 2 fivbit=1;
102 2 sixbit=1;
103 2 LED=LEDMAP[hour_low];
104 2 LED=LED&0x7f;
105 2 send164();
106 2 break;
107 2
108 2 case 3:
109 2 onebit=1;
110 2 twobit=1;
111 2 thrbit=0;
112 2 foubit=1;
113 2 fivbit=1;
114 2 sixbit=1;
115 2 LED=LEDMAP[min_hi];
116 2 send164();
117 2 break;
C51 COMPILER V8.02 CLOCK 07/21/2008 17:28:25 PAGE 3
118 2
119 2 //////////////
120 2 case 2:
121 2 onebit=1;
122 2 twobit=1;
123 2 thrbit=1;
124 2 foubit=0;
125 2 fivbit=1;
126 2 sixbit=1;
127 2 LED=LEDMAP[min_low];
128 2 LED=LED&0x7f;
129 2 send164();
130 2 break;
131 2
132 2 case 1:
133 2 onebit=1;
134 2 twobit=1;
135 2 thrbit=1;
136 2 foubit=1;
137 2 fivbit=0;
138 2 sixbit=1;
139 2 LED=LEDMAP[sec_hi];
140 2 send164();
141 2 break;
142 2
143 2 case 0:
144 2 onebit=1;
145 2 twobit=1;
146 2 thrbit=1;
147 2 foubit=1;
148 2 fivbit=1;
149 2 sixbit=0;
150 2 LED=LEDMAP[sec_low];
151 2 send164();
152 2 break;
153 2 }
154 1
155 1
156 1 if (buff_time==0)
157 1 {
158 2 buff_time=const_time; // refill the buffer
159 2 LED_Buffer=!LED_Buffer; // opposite the LED display
160 2 sec++;
161 2 if (sec==60)
162 2 {
163 3 min++;
164 3 sec=0;
165 3 if (min==60)
166 3 {
167 4 hour++;
168 4 min=0;
169 4
170 4 if (hour==60)
171 4 hour=0;
172 4 }
173 3
174 3 }
175 2 }
176 1
177 1 }
178
C51 COMPILER V8.02 CLOCK 07/21/2008 17:28:25 PAGE 4
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 348 ----
CONSTANT SIZE = 16 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 14 ----
IDATA SIZE = ---- ----
BIT SIZE = 1 ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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