📄 1602-wendu.lst
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C51 COMPILER V8.02 1602_WENDU 07/17/2010 10:42:44 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE 1602_WENDU
OBJECT MODULE PLACED IN 1602-wendu.OBJ
COMPILER INVOKED BY: D:\处理软件\keil\C51\BIN\C51.EXE 1602-wendu.c BROWSE DEBUG OBJECTEXTEND
line level source
1 /***************************************************************
2 “天祥电子” 倾情奉献
3 www.txmcu.com
4 www.txmcu.cn
5 *****************************************************************
6 程序功能： 将DS18B20所采集到的温度实时显示到1602上。
7 *****************************************************************/
8 #include <reg52.H>
9 #include <intrins.H>
10 #include <math.H>
11
12 #define uchar unsigned char
13 #define uint unsigned int
14 sbit dula = P2^6;
15 sbit wela = P2^7;
16
17 sbit RS = P3^5;
18 sbit LCDEN = P3^4;
19
20 void delayUs()
21 {
22 1 _nop_();
23 1 }
24
25 void delayMs(uint a)
26 {
27 1 uint i, j;
28 1 for(i = a; i > 0; i--)
29 1 for(j = 100; j > 0; j--);
30 1 }
31
32
33 void writeComm(uchar comm)
34 {
35 1 RS = 0;
36 1 P0 = comm;
37 1 LCDEN = 1;
38 1 delayUs();
39 1 LCDEN = 0;
40 1 delayMs(1);
41 1 }
42
43 //写数据:RS=1, RW=0;
44 void writeData(uchar dat)
45 {
46 1 RS = 1;
47 1 P0 = dat;
48 1 LCDEN = 1;
49 1 delayUs();
50 1 LCDEN = 0;
51 1 delayMs(1);
52 1 }
53
54
55 void init()
C51 COMPILER V8.02 1602_WENDU 07/17/2010 10:42:44 PAGE 2
56 {
57 1
58 1 dula = wela = 0;
59 1 writeComm(0x38);
60 1 writeComm(0x0c);
61 1 writeComm(0x06);
62 1 writeComm(0x01);
63 1 }
64
65 void writeString(uchar * str, uchar length)
66 {
67 1 uchar i;
68 1 for(i = 0; i < length; i++)
69 1 {
70 2 writeData(str[i]);
71 2 }
72 1 }
73
74 /**//*****************************DS18B20*******************************/
75 sbit ds = P2^2;
76 void dsInit()
77 {
78 1
79 1 unsigned int i;
80 1 ds = 0;
81 1 i = 100;
82 1 while(i>0) i--;
83 1 ds = 1;
84 1 i = 4;
85 1 while(i>0) i--;
86 1 }
87
88 void dsWait()
89 {
90 1 unsigned int i;
91 1 while(ds);
92 1 while(~ds);
93 1 i = 4;
94 1 while(i > 0) i--;
95 1 }
96
97
98 bit readBit()
99 {
100 1 unsigned int i;
101 1 bit b;
102 1 ds = 0;
103 1 i++;
104 1 ds = 1;
105 1 i++; i++;
106 1 b = ds;
107 1 i = 8;
108 1 while(i>0) i--;
109 1 return b;
110 1 }
111
112 unsigned char readByte()
113 {
114 1 unsigned int i;
115 1 unsigned char j, dat;
116 1 dat = 0;
117 1 for(i=0; i<8; i++)
C51 COMPILER V8.02 1602_WENDU 07/17/2010 10:42:44 PAGE 3
118 1 {
119 2 j = readBit();
120 2
121 2 dat = (j << 7) | (dat >> 1);
122 2 }
123 1 return dat;
124 1 }
125
126
127 void writeByte(unsigned char dat)
128 {
129 1 unsigned int i;
130 1 unsigned char j;
131 1 bit b;
132 1 for(j = 0; j < 8; j++)
133 1 {
134 2 b = dat & 0x01;
135 2 dat >>= 1;
136 2
137 2 if(b)
138 2 {
139 3 ds = 0; i++; i++;
140 3 ds = 1;
141 3 i = 8; while(i>0) i--;
142 3 }
143 2 else
144 2 {
145 3 ds = 0;
146 3 i = 8; while(i>0) i--;
147 3 ds = 1;
148 3 i++; i++;
149 3 }
150 2 }
151 1 }
152
153
154 void sendChangeCmd()
155 {
156 1 dsInit();
157 1 dsWait();
158 1 delayMs(1);
159 1 writeByte(0xcc);
160 1 writeByte(0x44);
161 1 }
162
163 void sendReadCmd()
164 {
165 1 dsInit();
166 1 dsWait();
167 1 delayMs(1);
168 1 writeByte(0xcc);
169 1 writeByte(0xbe);
170 1 }
171
172
173 int getTmpValue()
174 {
175 1 unsigned int tmpvalue;
176 1 int value;
177 1 float t;
178 1 unsigned char low, high;
179 1 sendReadCmd();
C51 COMPILER V8.02 1602_WENDU 07/17/2010 10:42:44 PAGE 4
180 1
181 1 low = readByte();
182 1 high = readByte();
183 1
184 1 tmpvalue = high;
185 1 tmpvalue <<= 8;
186 1 tmpvalue |= low;
187 1 value = tmpvalue;
188 1
189 1 \
190 1 t = value * 0.0625;
191 1 \
192 1 value = t * 100 + (value > 0 ? 0.5 : -0.5); //大于0加0.5, 小于0减0.5
193 1 return value;
194 1 }
195
196 void display(int v)
197 {
198 1 unsigned char count;
199 1 unsigned char datas[] = {0, 0, 0, 0, 0};
200 1 unsigned int tmp = abs(v);
201 1 datas[0] = tmp / 10000;
202 1 datas[1] = tmp % 10000 / 1000;
203 1 datas[2] = tmp % 1000 / 100;
204 1 datas[3] = tmp % 100 / 10;
205 1 datas[4] = tmp % 10;
206 1 writeComm(0xc0+3);
207 1 if(v < 0)
208 1 {
209 2 writeString("- ", 2);
210 2 }
211 1 else
212 1 {
213 2 writeString("+ ", 2);
214 2 }
215 1 if(datas[0] != 0)
216 1 {
217 2 writeData('0'+datas[0]);
218 2 }
219 1 for(count = 1; count != 5; count++)
220 1 {
221 2 writeData('0'+datas[count]);
222 2 if(count == 2)
223 2 {
224 3 writeData('.');
225 3 }
226 2 }
227 1 }
228 /**//*****************************DS18B20*******************************/
229
230 void main()
231 {
232 1 uchar table[] = " xianzaiwendu: ";
233 1 sendChangeCmd();
234 1 init();
235 1 writeComm(0x80);
236 1 writeString(table, 16);
237 1 while(1)
238 1 {
239 2 delayMs(1000); //温度转换时间需要750ms以上
240 2 writeComm(0xc0);
241 2 display(getTmpValue());
C51 COMPILER V8.02 1602_WENDU 07/17/2010 10:42:44 PAGE 5
242 2 sendChangeCmd();
243 2 }
244 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 724 ----
CONSTANT SIZE = 28 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 35
IDATA SIZE = ---- ----
BIT SIZE = ---- 2
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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