📄 lesson8.lst
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C51 COMPILER V8.02 LESSON8 05/07/2008 23:43:57 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE LESSON8
OBJECT MODULE PLACED IN lesson8.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE lesson8.c DEBUG OBJECTEXTEND
line level source
1 #include<reg52.h>
2 #define uchar unsigned char
3 #define uint unsigned int
4 #define T_cont 0.0625;
5 uchar code welcome[]={"High Sensor Temp"};
6 uchar code welcome1[]={"Design by:ljh"};
7 uchar code temp[]={"temp: "};
8 uchar code ds18b20[]={"DS18B20 OK"};
9
10 bit T_sign;
11 sbit DS=P3^3;
12 float temp1=0;
13 uchar t_bai,t_shi,t_ge,t_feng,t_miao;
14
15 sbit lcden=P2^2;
16 sbit lcdrs=P2^0;
17 sbit lcdrw=P2^1;
18
19
20
21
22 ///////////////////////////////////////////////////////////////////////
23
24 void delay(uint z)
25 {
26 1 uint x,y;
27 1 for(x=z;x>0;x--)
28 1 for(y=110;y>0;y--);
29 1 }
30
31
32 void dsreset(void) //send reset and initialization command
33
34 {
35 1
36 1 uint i; //DS18B20初始化
37 1
38 1 DS=0;
39 1
40 1 i=103;
41 1
42 1 while(i>0)i--;
43 1
44 1 DS=1;
45 1
46 1 i=4;
47 1
48 1 while(i>0)i--;
49 1
50 1 }
51
52
53
54 bit tmpreadbit(void) //read a bit 读一位
55
C51 COMPILER V8.02 LESSON8 05/07/2008 23:43:57 PAGE 2
56 {
57 1
58 1 uint i;
59 1
60 1 bit dat;
61 1
62 1 DS=0;i++; //i++ for delay 小延时一下
63 1
64 1 DS=1;i++;i++;
65 1
66 1 dat=DS;
67 1
68 1 i=8;
69 1 while(i>0)i--;
70 1
71 1 return (dat);
72 1
73 1 }
74
75
76
77 uchar tmpread(void) //read a byte date 读一个字节
78
79 {
80 1
81 1 uchar i,j,dat;
82 1
83 1 dat=0;
84 1
85 1 for(i=1;i<=8;i++)
86 1
87 1 {
88 2
89 2 j=tmpreadbit();
90 2
91 2 dat=(j<<7)|(dat>>1); //读出的数据最低位在最前面，这样刚好//一个字节在DAT里
92 2
93 2 }
94 1
95 1 return(dat); //将一个字节数据返回
96 1
97 1 }
98
99
100
101 void tmpwritebyte(uchar dat) //write a byte to ds18b20
102
103 { //写一个字节到DS18B20里
104 1
105 1 uint i;
106 1
107 1 uchar j;
108 1
109 1 bit testb;
110 1
111 1 for(j=1;j<=8;j++)
112 1
113 1 {
114 2
115 2 testb=dat&0x01;
116 2
117 2 dat=dat>>1;
C51 COMPILER V8.02 LESSON8 05/07/2008 23:43:57 PAGE 3
118 2
119 2 if(testb) //write 1 写1部分
120 2
121 2 {
122 3
123 3 DS=0;
124 3
125 3 i++;i++;
126 3
127 3 DS=1;
128 3
129 3 i=8;while(i>0)i--;
130 3
131 3 }
132 2
133 2 else
134 2
135 2 {
136 3
137 3 DS=0; //write 0 写0部分
138 3
139 3 i=8;while(i>0)i--;
140 3
141 3 DS=1;
142 3
143 3 i++;i++;
144 3
145 3 }
146 2
147 2 }
148 1
149 1 }
150
151
152
153
154
155
156
157 void readtemperature()
158 {
159 1 uint y;
160 1 uchar T_L=0;
161 1 uchar T_H=0;
162 1 uchar k;
163 1 dsreset();
164 1 delay(1);
165 1 tmpwritebyte(0xcc);
166 1 tmpwritebyte(0x44);
167 1 dsreset();
168 1 delay(1);
169 1 tmpwritebyte(0xcc);
170 1 tmpwritebyte(0xbe);
171 1 T_L=tmpread();
172 1 T_H=tmpread();
173 1 k=T_H&0x08;
174 1 if(k==0x08)
175 1 T_sign=1;
176 1 else
177 1 T_sign=0;
178 1
179 1 T_H=T_H&0x07;
C51 COMPILER V8.02 LESSON8 05/07/2008 23:43:57 PAGE 4
180 1 temp1=(T_H*256+T_L)*T_cont;
181 1 temp1=temp1*100;
182 1 t_bai=(uint)temp1/10000;
183 1 y=(uint)temp1%10000;
184 1 t_shi=y/1000;
185 1 y=(uint)y%1000;
186 1 t_ge=y/100;
187 1 y=(uint)y%100;
188 1 t_feng=y/10;
189 1 t_miao=(uint)y%10;
190 1
191 1
192 1 }
193
194
195 ///////////////////////////////////////////////////////////
196
197
198 void write_com(uchar com)
199 {
200 1
201 1 lcdrs=0;
202 1 P0=com;
203 1 delay(5); //延时
204 1 lcden=1; //下三行表示E高脉冲到来就开始转换
205 1 delay(5);
206 1 lcden=0;
207 1 }
208
209 void write_data(uchar date)
210 {
211 1 lcdrs=1;
212 1 P0=date;
213 1 delay(5);
214 1 lcden=1;
215 1 delay(5);
216 1 lcden=0;
217 1 }
218 void init()
219 {
220 1 lcdrw=0;
221 1 lcden=0;
222 1 write_com(0x38);
223 1 write_com(0x0e);
224 1 write_com(0x06);
225 1 write_com(0x01);
226 1
227 1 }
228 void print(uchar a,uchar *str)
229 {
230 1 write_com(a);
231 1 while(*str!='\0') {write_data(*str++);}
232 1 *str=0;
233 1
234 1 }
235
236 void print1(uchar a,uchar t)
237 {
238 1 write_com(a);
239 1 write_data(t);
240 1 }
241
C51 COMPILER V8.02 LESSON8 05/07/2008 23:43:57 PAGE 5
242
243
244
245
246
247
248 void main()
249 {
250 1
251 1
252 1 init();
253 1
254 1
255 1 print(0x80,welcome);
256 1 print(0xc0,welcome1);
257 1
258 1 delay(1000);
259 1
260 1 init();
261 1 while(1)
262 1 {
263 2 readtemperature();
264 2 print(0x80,ds18b20);
265 2 print(0xc0,temp);
266 2 if(T_sign==1)
267 2 print1(0xc7,0x2d);
268 2 else
269 2 print1(0xc7,0x2b);
270 2
271 2 if(t_bai!=0)
272 2 print1(0xc8,t_bai+0x30);
273 2 else
274 2 print1(0xc8,0x20);
275 2 print1(0xc9,t_shi+0x30);
276 2 print1(0xca,t_ge+0x30);
277 2 print1(0xcb,0x2e);
278 2 print1(0xcc,t_feng+0x30);
279 2 print1(0xcd,t_miao+0x30);
280 2 print1(0xce,0x43);
281 2
282 2 }
283 1
284 1
285 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 674 ----
CONSTANT SIZE = 49 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 9 3
IDATA SIZE = ---- ----
BIT SIZE = 1 2
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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