📄 24c02-c.lst
字号:
C51 COMPILER V8.08 24C02_C 03/09/2009 12:03:53 PAGE 1
C51 COMPILER V8.08, COMPILATION OF MODULE 24C02_C
OBJECT MODULE PLACED IN 24c02-C.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE 24c02-C.c BROWSE DEBUG OBJECTEXTEND
line level source
1 /*24C02-多花样流水灯演示程序（C51）
2 /* 将演示数据先写入24C02芯片内，再将其数据逐个读出送P0口LED显示。
3 /*******************************************************************/
4 #include <reg51.h>
5 #include <intrins.h>
6 #define uchar unsigned char
7 #define uint unsigned int
8 #define OP_WRITE 0xa0 // 器件地址以及写入操作
9 #define OP_READ 0xa1 // 器件地址以及读取操作
10
11 uchar code display[72]={
12 0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F,
13 0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFE,0xFF,
14 0xFE,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x00,
15 0x80,0xC0,0xE0,0xF0,0xF8,0xFC,0xFE,0xFF,
16 0xFC,0xF9,0xF3,0xE7,0xCF,0x9F,0x3F,
17 0x9F,0xCF,0xE7,0xF3,0xF9,0xFC,0xFF,
18 0xE7,0xDB,0xBD,0x7E,0xBD,0xDB,0xE7,0xFF,
19 0xE7,0xC3,0x81,0x00,0x81,0xC3,0xE7,0xFF,
20 0xAA,0x55,0x18,0xFF,0xF0,0x0F,
21 0x00,0xFF,0x00,0xFF };
22
23 sbit SDA = P3^5;
24 sbit SCL = P3^4;
25
26 void start();
27 void stop();
28 uchar shin();
29 bit shout(uchar write_data);
30 void write_byte( uchar addr, uchar write_data);
31 void fill_byte(uchar fill_size,uchar fill_data);
32 void delayms(uint ms);
33 uchar read_current();
34 uchar read_random(uchar random_addr);
35
36 #define delayNOP(); {_nop_();_nop_();_nop_();_nop_();};
37
38 /**********************************************************/
39 main(void)
40 {
41 1 uchar i;
42 1 SDA = 1;
43 1 SCL = 1;
44 1 fill_byte(72,0xff); // 将前72字节填充0xff
45 1
46 1 for(i = 0 ; i < 72; i++) //写入显示代码到AT24C02
47 1 {
48 2 write_byte(i,display[i]);
49 2 }
50 1 for(i =0 ;i <72 ; i++) //从AT24C02移出数据送到P0口显示
51 1 {
52 2 P0 = read_random(i);
53 2 delayms(350);
54 2 }
55 1 }
C51 COMPILER V8.08 24C02_C 03/09/2009 12:03:53 PAGE 2
56
57 /**********************************************************/
58 void start()
59 //开始位
60 {
61 1 SDA = 1;
62 1 SCL = 1;
63 1 delayNOP();
64 1 SDA = 0;
65 1 delayNOP();
66 1 SCL = 0;
67 1 }
68
69 /**********************************************************/
70 void stop()
71 // 停止位
72 {
73 1 SDA = 0;
74 1 delayNOP();
75 1 SCL = 1;
76 1 delayNOP();
77 1 SDA = 1;
78 1 }
79
80 /**********************************************************/
81 uchar shin()
82 // 从AT24C02移出数据到MCU
83 {
84 1 uchar i,read_data;
85 1 for(i = 0; i < 8; i++)
86 1 {
87 2 SCL = 1;
88 2 read_data <<= 1;
89 2 read_data |= SDA;
90 2 SCL = 0;
91 2 }
92 1 return(read_data);
93 1 }
94
95 /**********************************************************/
96 bit shout(uchar write_data)
97 // 从MCU移出数据到AT24C02
98 {
99 1 uchar i;
100 1 bit ack_bit;
101 1 for(i = 0; i < 8; i++) // 循环移入8个位
102 1 {
103 2 SDA = (bit)(write_data & 0x80);
104 2 _nop_();
105 2 SCL = 1;
106 2 delayNOP();
107 2 SCL = 0;
108 2 write_data <<= 1;
109 2 }
110 1 SDA = 1; // 读取应答
111 1 delayNOP();
112 1 SCL = 1;
113 1 delayNOP();
114 1 ack_bit = SDA;
115 1 SCL = 0;
116 1 return ack_bit; // 返回AT24C02应答位
117 1 }
C51 COMPILER V8.08 24C02_C 03/09/2009 12:03:53 PAGE 3
118
119 /**********************************************************/
120 void write_byte(uchar addr, uchar write_data)
121 // 在指定地址addr处写入数据write_data
122 {
123 1 start();
124 1 shout(OP_WRITE);
125 1 shout(addr);
126 1 shout(write_data);
127 1 stop();
128 1 delayms(10); // 写入周期
129 1 }
130
131 /**********************************************************/
132 void fill_byte(uchar fill_size,uchar fill_data)
133 // 填充数据fill_data到EEPROM内fill_size字节
134 {
135 1 uchar i;
136 1 for(i = 0; i < fill_size; i++)
137 1 {
138 2 write_byte(i, fill_data);
139 2 }
140 1 }
141
142 /**********************************************************/
143 uchar read_current()
144 // 在当前地址读取
145 {
146 1 uchar read_data;
147 1 start();
148 1 shout(OP_READ);
149 1 read_data = shin();
150 1 stop();
151 1 return read_data;
152 1 }
153
154 /**********************************************************/
155 uchar read_random(uchar random_addr)
156 // 在指定地址读取
157 {
158 1 start();
159 1 shout(OP_WRITE);
160 1 shout(random_addr);
161 1 return(read_current());
162 1 }
163
164 /**********************************************************/
165 void delayms(uint ms)
166 // 延时子程序
167 {
168 1 uchar k;
169 1 while(ms--)
170 1 {
171 2 for(k = 0; k < 120; k++);
172 2 }
173 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 271 ----
CONSTANT SIZE = 72 ----
XDATA SIZE = ---- ----
C51 COMPILER V8.08 24C02_C 03/09/2009 12:03:53 PAGE 4
PDATA SIZE = ---- ----
DATA SIZE = ---- 4
IDATA SIZE = ---- ----
BIT SIZE = ---- 1
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -