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C51 COMPILER V8.09 24XLED 07/12/2010 14:44:07 PAGE 1
C51 COMPILER V8.09, COMPILATION OF MODULE 24XLED
OBJECT MODULE PLACED IN 24xled.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE 24xled.c BROWSE DEBUG OBJECTEXTEND
line level source
1 #include <reg52.h>
2 #include <intrins.h>
3 #define uchar unsigned char
4 #define uint unsigned int
5 #define OP_WRITE 0xa0 // 器件地址以及写入操作
6 #define OP_READ 0xa1 // 器件地址以及读取操作
7 uchar code display[72]={
8 0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F,
9 0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFE,0xFF,
10 0xFE,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x00,
11 0x80,0xC0,0xE0,0xF0,0xF8,0xFC,0xFE,0xFF,
12 0xFC,0xF9,0xF3,0xE7,0xCF,0x9F,0x3F,
13 0x9F,0xCF,0xE7,0xF3,0xF9,0xFC,0xFF,
14 0xE7,0xDB,0xBD,0x7E,0xBD,0xDB,0xE7,0xFF,
15 0xE7,0xC3,0x81,0x00,0x81,0xC3,0xE7,0xFF,
16 0xAA,0x55,0x18,0xFF,0xF0,0x0F,
17 0x00,0xFF,0x00,0xFF };
18 sbit SDA = P3^5;
19 sbit SCL = P3^4;
20 void start();
21 void stop();
22 uchar shin();
23 bit shout(uchar write_data);
24 void write_byte( uchar addr, uchar write_data);
25 void fill_byte(uchar fill_size,uchar fill_data);
26 void delayms(uint ms);
27 uchar read_current();
28 uchar read_random(uchar random_addr);
29 #define delayNOP(); {_nop_();_nop_();_nop_();_nop_();};
30 /**********************************************************/
31 main(void)
32 {
33 1 uchar i;
34 1 SDA = 1;
35 1 SCL = 1;
36 1 fill_byte(72,0xff); // 将前72字节填充0xff
37 1 for(i = 0 ; i < 72; i++) //写入显示代码到AT24C02
38 1 {
39 2 write_byte(i,display[i]);
40 2 }
41 1 for(i =0 ;i <72 ; i++) //从AT24C02移出数据送到P0口显示
42 1 {
43 2 P0 = read_random(i);
44 2 P1=~P0;
45 2 delayms(350);
46 2 }
47 1 }
48 /**********************************************************/
49 void start()
50 //开始位
51 {
52 1 SDA = 1;
53 1 SCL = 1;
54 1 delayNOP();
55 1 SDA = 0;
C51 COMPILER V8.09 24XLED 07/12/2010 14:44:07 PAGE 2
56 1 delayNOP();
57 1 SCL = 0;
58 1 }
59 /**********************************************************/
60 void stop()
61 // 停止位
62 {
63 1 SDA = 0;
64 1 delayNOP();
65 1 SCL = 1;
66 1 delayNOP();
67 1 SDA = 1;
68 1 }
69 /**********************************************************/
70 uchar shin()
71 // 从AT24C02移出数据到MCU
72 {
73 1 uchar i,read_data;
74 1 for(i = 0; i < 8; i++)
75 1 {
76 2 SCL = 1;
77 2 read_data <<= 1;
78 2 read_data |= SDA;
79 2 SCL = 0;
80 2 }
81 1 return(read_data);
82 1 }
83 /**********************************************************/
84 bit shout(uchar write_data)
85 // 从MCU移出数据到AT24C02
86 {
87 1 uchar i;
88 1 bit ack_bit;
89 1 for(i = 0; i < 8; i++) // 循环移入8个位
90 1 {
91 2 SDA = (bit)(write_data & 0x80);
92 2 _nop_();
93 2 SCL = 1;
94 2 delayNOP();
95 2 SCL = 0;
96 2 write_data <<= 1;
97 2 }
98 1 SDA = 1; // 读取应答
99 1 delayNOP();
100 1 SCL = 1;
101 1 delayNOP();
102 1 ack_bit = SDA;
103 1 SCL = 0;
104 1 return ack_bit; // 返回AT24C02应答位
105 1 }
106 /**********************************************************/
107 void write_byte(uchar addr, uchar write_data)
108 // 在指定地址addr处写入数据write_data
109 {
110 1 start();
111 1 shout(OP_WRITE);
112 1 shout(addr);
113 1 shout(write_data);
114 1 stop();
115 1 delayms(10); // 写入周期
116 1 }
117 /**********************************************************/
C51 COMPILER V8.09 24XLED 07/12/2010 14:44:07 PAGE 3
118 void fill_byte(uchar fill_size,uchar fill_data)
119 // 填充数据fill_data到EEPROM内fill_size字节
120 {
121 1 uchar i;
122 1 for(i = 0; i < fill_size; i++)
123 1 {
124 2 write_byte(i, fill_data);
125 2 }
126 1 }
127 /**********************************************************/
128 uchar read_current()
129 // 在当前地址读取
130 {
131 1 uchar read_data;
132 1 start();
133 1 shout(OP_READ);
134 1 read_data = shin();
135 1 stop();
136 1 return read_data;
137 1 }
138 /**********************************************************/
139 uchar read_random(uchar random_addr)
140 // 在指定地址读取
141 {
142 1 start();
143 1 shout(OP_WRITE);
144 1 shout(random_addr);
145 1 return(read_current());
146 1 }
147 /**********************************************************/
148 void delayms(uint ms)
149 // 延时子程序
150 {
151 1 uchar k;
152 1 while(ms--)
153 1 {
154 2 for(k = 0; k < 120; k++);
155 2 }
156 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 276 ----
CONSTANT SIZE = 72 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 4
IDATA SIZE = ---- ----
BIT SIZE = ---- 1
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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