📄 ds2401.lst
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C51 COMPILER V7.50 DS2401 06/11/2008 15:16:27 PAGE 1
C51 COMPILER V7.50, COMPILATION OF MODULE DS2401
OBJECT MODULE PLACED IN DS2401.OBJ
COMPILER INVOKED BY: D:\Program Files\keil\C51\BIN\C51.EXE DS2401.C BROWSE DEBUG OBJECTEXTEND
line level source
1
2 #include "sys.h"
3 //******************************DS2401初始化*************************
4
5 unsigned char DS2401Init(void)
6 {
7 1 unsigned char result;
8 1 DelayNus(G);
9 1 DS2401IO = 0; // Drives DQ low
10 1 DelayNus(H);
11 1 DS2401IO = 1; // Releases the bus
12 1 DelayNus(I);
13 1 if(DS2401IO==0)
14 1 result = 1;
15 1 else
16 1 result = 0;
17 1 DelayNus(J); // Complete the reset sequence recovery
18 1 return result; // Return sample presence pulse result
19 1 //1代表初始化成功，0代表失败
20 1 }
21
22 //******************************发送读写命令*************************
23 void SendOrderToDS2401(unsigned char order)
24 {
25 1 unsigned char Temp = 8;
26 1 while(Temp)
27 1 {
28 2 if(order&0x80)
29 2 {
30 3 DS2401IO = 0;
31 3 DelayNus(40);//拉低10us
32 3 DS2401IO = 1;//拉高
33 3 DelayNus(200);
34 3 }
35 2 else
36 2 {
37 3 DS2401IO = 0;
38 3 DelayNus(100);//拉低100us
39 3 DS2401IO = 1;//拉高
40 3 DelayNus(200);
41 3 }
42 2 Temp--;
43 2 order<<=1;
44 2 }
45 1
46 1 }
47
48 //*****************************对2401写一位数据**********************
49 void DS2401WriteBit(bit b)
50 {
51 1 if (b)
52 1 {
53 2 // Write '1' bit
54 2 DS2401IO = 0; // Drives DQ low
55 2 DelayNus(A);
C51 COMPILER V7.50 DS2401 06/11/2008 15:16:27 PAGE 2
56 2 DS2401IO = 1; // Releases the bus
57 2 DelayNus(B); // Complete the time slot and 10us recovery
58 2 }
59 1 else
60 1 {
61 2 // Write '0' bit
62 2 DS2401IO = 0; // Drives DQ low
63 2 DelayNus(C);
64 2 DS2401IO = 1; // Releases the bus
65 2 DelayNus(D);
66 2 }
67 1 }
68
69 //*****************************对2401读一位数据**********************
70
71 unsigned char DS2401ReadBit(void)
72 {
73 1 unsigned char result;
74 1 DS2401IO = 0; // Drives DQ low
75 1 DelayNus(A);
76 1 DS2401IO = 1; // Releases the bus
77 1 DelayNus(E);
78 1 result = DS2401IO ;; // Sample the bit value from the slave
79 1 DelayNus(F); // Complete the time slot and 10us recovery
80 1 return result;
81 1 }
82 //*****************************对2401写一个字节数据**********************
83
84 void OWWriteByte(int value)
85 {
86 1 unsigned char loop;
87 1 for (loop = 0; loop < 8; loop++)
88 1 {
89 2 DS2401WriteBit(value & 0x01);
90 2 value >>= 1;
91 2 }
92 1 }
93 //*****************************对2401读一个字节数据**********************
94
95 unsigned char OWReadByte(void)
96 {
97 1 unsigned char loop, result=0;
98 1 for (loop = 0; loop < 8; loop++)
99 1 {
100 2 result >>= 1;
101 2 if (DS2401ReadBit())
102 2 result |= 0x80;
103 2 }
104 1 return result;
105 1 }
106
107 //******************************读DS2401 ID 号*************************
108 void ReadDS2401ID(void)
109 {
110 1
111 1 unsigned char Temp=0;
112 1 while(1)
113 1 {
114 2 if(DS2401Init())
115 2 {
116 3 DS2401WorkOK = 1;//表示DS2401初始化成功
117 3 break;
C51 COMPILER V7.50 DS2401 06/11/2008 15:16:27 PAGE 3
118 3 }
119 2 else Temp++;
120 2 if(Temp>=10)
121 2 {
122 3 DS2401WorkOK=0;//初始化10次失败的化，表示DS2401工作不正常
123 3 break;
124 3 }
125 2 }
126 1 if(DS2401WorkOK)
127 1 {
128 2 OWWriteByte(0x33);//发送读命令码
129 2 for (Temp=0;Temp<8;Temp++)
130 2 {
131 3 IDCode[Temp] = OWReadByte();//读一个字节，总共8个
132 3 }
133 2 }
134 1
135 1 }
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MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 294 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 10
IDATA SIZE = ---- ----
C51 COMPILER V7.50 DS2401 06/11/2008 15:16:27 PAGE 4
BIT SIZE = ---- 1
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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