📄 temp.lst
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C51 COMPILER V7.10 TEMP 07/29/2010 11:37:59 PAGE 1
C51 COMPILER V7.10, COMPILATION OF MODULE TEMP
OBJECT MODULE PLACED IN Temp.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE Temp.c BROWSE DEBUG OBJECTEXTEND
line level source
1
2 /*************************此部分为18B20的驱动程序*************************************/
3
4 #include <reg52.H>
5 #include <intrins.h>
6
7 sbit D18B20=P3^7;
8 #define NOP() _nop_() /* 定义空指令 */
9 #define _Nop() _nop_() /*定义空指令*/
10
11 void TempDelay (unsigned char idata us);
12 void Init18b20 (void);
13 void WriteByte (unsigned char idata wr); //单字节写入
14 void read_bytes (unsigned char idata j);
15 unsigned char CRC (unsigned char j);
16 void GemTemp (void);
17 void Config18b20 (void);
18 void ReadID (void);
19 void TemperatuerResult(void);
20
21
22 bit flag;
23 unsigned int idata Temperature;
24 unsigned char idata temp_buff[9]; //存储读取的字节，read scratchpad为9字节，read rom ID为8字节
25 unsigned char idata id_buff[8];
26 unsigned char idata *p,TIM;
27 unsigned char idata crc_data;
28
29
30 unsigned char code CrcTable [256]={
31 0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,
32 157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,
33 35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,
34 190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,
35 70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,
36 219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,
37 101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,
38 248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,
39 140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,
40 17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,
41 175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,
42 50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,
43 202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,
44 87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,
45 233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,
46 116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53};
47 //
48 /************************************************************
49 *Function:延时处理
50 *parameter:
51 *Return:
52 *Modify:
53 *************************************************************/
54 void TempDelay (unsigned char idata us)
55 {
C51 COMPILER V7.10 TEMP 07/29/2010 11:37:59 PAGE 2
56 1 while(us--);
57 1 }
58
59 /************************************************************
60 *Function:18B20初始化
61 *parameter:
62 *Return:
63 *Modify:
64 *************************************************************/
65 void Init18b20 (void)
66 {
67 1 D18B20=1;
68 1 _nop_();
69 1 D18B20=0;
70 1 TempDelay(80); //delay 530 uS//80
71 1 _nop_();
72 1 D18B20=1;
73 1 TempDelay(14); //delay 100 uS//14
74 1 _nop_();
75 1 _nop_();
76 1 _nop_();
77 1
78 1 if(D18B20==0)
79 1 flag = 1; //detect 1820 success!
80 1 else
81 1 flag = 0; //detect 1820 fail!
82 1 TempDelay(20); //20
83 1 _nop_();
84 1 _nop_();
85 1 D18B20 = 1;
86 1 }
87
88 /************************************************************
89 *Function:向18B20写入一个字节
90 *parameter:
91 *Return:
92 *Modify:
93 *************************************************************/
94 void WriteByte (unsigned char idata wr) //单字节写入
95 {
96 1 unsigned char idata i;
97 1 for (i=0;i<8;i++)
98 1 {
99 2 D18B20 = 0;
100 2 _nop_();
101 2 D18B20=wr&0x01;
102 2 TempDelay(3); //delay 45 uS //5
103 2 _nop_();
104 2 _nop_();
105 2 D18B20=1;
106 2 wr >>= 1;
107 2 }
108 1 }
109
110 /************************************************************
111 *Function:读18B20的一个字节
112 *parameter:
113 *Return:
114 *Modify:
115 *************************************************************/
116 unsigned char ReadByte (void) //读取单字节
117 {
C51 COMPILER V7.10 TEMP 07/29/2010 11:37:59 PAGE 3
118 1 unsigned char idata i,u=0;
119 1 for(i=0;i<8;i++)
120 1 {
121 2 D18B20 = 0;
122 2 u >>= 1;
123 2 D18B20 = 1;
124 2 if(D18B20==1)
125 2 u |= 0x80;
126 2 TempDelay (2);
127 2 _nop_();
128 2 }
129 1 return(u);
130 1 }
131
132 /************************************************************
133 *Function:读18B20
134 *parameter:
135 *Return:
136 *Modify:
137 *************************************************************/
138 void read_bytes (unsigned char idata j)
139 {
140 1 unsigned char idata i;
141 1 for(i=0;i<j;i++)
142 1 {
143 2 *p = ReadByte();
144 2 p++;
145 2 }
146 1 }
147
148 /************************************************************
149 *Function:CRC校验
150 *parameter:
151 *Return:
152 *Modify:
153 *************************************************************/
154 unsigned char CRC (unsigned char j)
155 {
156 1 unsigned char idata i,crc_data=0;
157 1 for(i=0;i<j;i++) //查表校验
158 1 crc_data = CrcTable[crc_data^temp_buff[i]];
159 1 return (crc_data);
160 1 }
161
162 /************************************************************
163 *Function:读取温度
164 *parameter:
165 *Return:
166 *Modify:
167 *************************************************************/
168 void GemTemp (void)
169 {
170 1 read_bytes (9);
171 1 if (CRC(9)==0) //校验正确
172 1 {
173 2 Temperature = temp_buff[1]*0x100 + temp_buff[0];
174 2 // Temperature *= 0.625;
175 2 Temperature /= 16;
176 2 TempDelay(1);
177 2 }
178 1 }
179
C51 COMPILER V7.10 TEMP 07/29/2010 11:37:59 PAGE 4
180 /************************************************************
181 *Function:内部配置
182 *parameter:
183 *Return:
184 *Modify:
185 *************************************************************/
186 void Config18b20 (void) //重新配置报警限定值和分辨率
187 {
188 1 Init18b20();
189 1 WriteByte(0xcc); //skip rom
190 1 WriteByte(0x4e); //write scratchpad
191 1 WriteByte(0x19); //上限
192 1 WriteByte(0x1a); //下限
193 1 WriteByte(0x7f); //set 11 bit (0.125)
194 1 Init18b20();
195 1 WriteByte(0xcc); //skip rom
196 1 WriteByte(0x48); //保存设定值
197 1 Init18b20();
198 1 WriteByte(0xcc); //skip rom
199 1 WriteByte(0xb8); //回调设定值
200 1 }
201
202 /************************************************************
203 *Function:读18B20ID
204 *parameter:
205 *Return:
206 *Modify:
207 *************************************************************/
208 void ReadID (void)//读取器件 id
209 {
210 1 Init18b20();
211 1 WriteByte(0x33); //read rom
212 1 read_bytes(8);
213 1 }
214
215 /************************************************************
216 *Function:18B20ID全处理
217 *parameter:
218 *Return:
219 *Modify:
220 *************************************************************/
221 void TemperatuerResult(void)
222 {
223 1 p = id_buff;
224 1 ReadID();
225 1 Config18b20();
226 1 Init18b20 ();
227 1 WriteByte(0xcc); //skip rom
228 1 WriteByte(0x44); //Temperature convert
229 1
230 1 Init18b20 ();
231 1 WriteByte(0xcc); //skip rom
232 1 WriteByte(0xbe); //read Temperature
233 1 p = temp_buff;
234 1 GemTemp();
235 1 }
236
237
238 void GetTemp()
239 {
240 1 if(TIM==1)
241 1 { TIM=0;
C51 COMPILER V7.10 TEMP 07/29/2010 11:37:59 PAGE 5
242 2 TemperatuerResult();
243 2 }
244 1
245 1 }
246
247 /*************************************
248 [ t1 (0.5ms)中断] 中断中做 PWM 输出
249 ------------1000/(0.02ms*250)=200Hz
250 *************************************/
251 void T1zd(void) interrupt 3
252 {
253 1 TH1 = 0xfe; //11.0592
254 1 TL1 = 0x33;
255 1 TIM++;
256 1
257 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 351 ----
CONSTANT SIZE = 256 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 2 ----
IDATA SIZE = 20 6
BIT SIZE = 1 ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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