📄 ds18b20(lcd).lst
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C51 COMPILER V8.08 DS18B20_LCD_ 10/05/2008 16:26:09 PAGE 1
C51 COMPILER V8.08, COMPILATION OF MODULE DS18B20_LCD_
OBJECT MODULE PLACED IN DS18B20(LCD).OBJ
COMPILER INVOKED BY: D:\keil\C51\BIN\C51.EXE DS18B20(LCD).C BROWSE DEBUG OBJECTEXTEND
line level source
1 #include <reg52.h>
2 #define uchar unsigned char
3 #define uint unsigned int
4 sbit DS=P2^2; //define interface
5 sbit lcden=P3^4;
6 sbit lcdrs=P3^5;
7 sbit dula=P2^6;
8 sbit wela=P2^7;
9 sbit beep=P2^3;
10 sbit dscs=P1^4;
11 sbit dsas=P1^5;
12 sbit dsrw=P1^6;
13 sbit dsds=P1^7;
14 sbit s1=P3^0;
15 sbit s2=P3^1;
16 sbit s3=P3^2;
17 sbit ss=P3^6;
18 sbit rd=P3^7;
19 uchar code tab[] ={ 0x18,0x18,0x07,0x08,0x08,0x08,0x07,0x00, //℃，代码 0x00
20 0x00,0x00,0x00,0x00,0x0C,0x0C,0x00,0x00,}; //.
21 uint temp,bai,shi,ge; // 温度值的变量
22 uchar flag1; // 结果为负和正的标志位
23 void readrom();
24 void tmp();
25 void write_date(uchar) ;
26 void write_com(uchar );
27 void tmpwritebyte(uchar );
28
29 void delay(uint count) //delay
30 {
31 1 uint i;
32 1 while(count)
33 1 {
34 2 i=20;
35 2 while(i>0)
36 2 i--;
37 2 count--;
38 2 }
39 1 }
40 void dsreset(void) //发送复位和初始化
41 {
42 1 uint i;
43 1 DS=0;
44 1 i=103;
45 1 while(i>0)i--; //延时
46 1 DS=1;
47 1 i=4;
48 1 while(i>0)i--;
49 1 }
50
51 bit tmpreadbit(void) //读取数据的一位
52 {
53 1 uint i;
54 1 bit dat;
55 1 DS=0;i++; //i++ for delay
C51 COMPILER V8.08 DS18B20_LCD_ 10/05/2008 16:26:09 PAGE 2
56 1 DS=1;i++;i++;
57 1 dat=DS;
58 1 i=8;while(i>0)i--;
59 1 return (dat);
60 1 }
61
62 uchar tmpread(void) //读一个字节
63 {
64 1 uchar i,j,dat;
65 1 dat=0;
66 1 for(i=1;i<=8;i++)
67 1 {
68 2 j=tmpreadbit();
69 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
70 2 }
71 1 return(dat);
72 1 }
73
74 void tmpwritebyte(uchar dat) //write a byte to ds18b20
75 {
76 1 uint i;
77 1 uchar j;
78 1 bit testb;
79 1 for(j=1;j<=8;j++)
80 1 {
81 2 testb=dat&0x01;
82 2 dat=dat>>1;
83 2 if(testb) //write 1
84 2 {
85 3 DS=0;
86 3 i++;i++;
87 3 DS=1;
88 3 i=8;while(i>0)i--;
89 3 }
90 2 else
91 2 {
92 3 DS=0; //write 0
93 3 i=8;while(i>0)i--;
94 3 DS=1;
95 3 i++;i++;
96 3 }
97 2 }
98 1 }
99
100 void tmpchange(void) //DS18B20 begin change
101 {
102 1 dsreset();
103 1 delay(1);
104 1 tmpwritebyte(0xcc); // address all drivers on bus
105 1 tmpwritebyte(0x44); // initiates a single temperature conversion
106 1 }
107
108 void tmp() //读取温度
109 {
110 1 float tt;
111 1 uchar a,b;
112 1 dsreset(); //复位
113 1 delay(1);
114 1 tmpwritebyte(0xcc); //跳过序列号命令
115 1 tmpwritebyte(0xbe); //发转换命令
116 1 a=tmpread(); //读取低位温度
117 1 b=tmpread(); //读取高位温度
C51 COMPILER V8.08 DS18B20_LCD_ 10/05/2008 16:26:09 PAGE 3
118 1 temp=b;
119 1 temp<<=8; //two byte compose a int variable
120 1 temp=temp|a;
121 1 tt=temp*0.0625;
122 1 temp=tt*10+0.5;
123 1 // return temp;
124 1 }
125
126 /************************
127 1602
128 **************************/
129 void write_com(uchar com) //写命令
130 {
131 1 lcdrs=0;
132 1 lcden=0;
133 1 P0=com;
134 1 delay(5);
135 1 lcden=1;
136 1 delay(5);
137 1 lcden=0;
138 1 }
139
140 void write_date(uchar dat) //写数据
141 {
142 1 lcdrs=1;
143 1 lcden=0;
144 1 P0=dat;
145 1 delay(5);
146 1 lcden=1;
147 1 delay(5);
148 1 lcden=0;
149 1 }
150
151 void init() //初始化
152 {
153 1 EA=1;
154 1 EX0=1;//开外部0中断
155 1 IT0=1;//外部中断0的触发方式为边沿触发方式（ 下降沿有效）
156 1
157 1 dula=0;
158 1 wela=0;
159 1 lcden=0;
160 1 write_com(0x38);
161 1 write_com(0x0c);
162 1 write_com(0x06);
163 1 write_com(0x01);
164 1 write_com(0x80);
165 1 write_com(0x80+0x40);
166 1 }
167
168 void write_tmp(uchar add2, uchar date1) //写温度
169 {
170 1 uchar bai,shi,ser;
171 1 ser=temp/10;
172 1 SBUF=ser;
173 1 bai=temp/100;
174 1 shi=temp%100/10;
175 1 write_com(0x80+0x40+add2);
176 1 write_date(0x30+bai);
177 1 write_date(0x30+shi);
178 1 }
*** WARNING C280 IN LINE 168 OF DS18B20(LCD).C: 'date1': unreferenced local variable
C51 COMPILER V8.08 DS18B20_LCD_ 10/05/2008 16:26:09 PAGE 4
179 void write_tmp1(uchar add3, uchar date2) //写温度小数点后一位
180 {
181 1 uchar ge,ser;
182 1 ser=temp/10;
183 1 SBUF=ser;
184 1 ge=temp%10;
185 1 write_com(0x80+0x40+add3);
186 1 write_date(0x30+ge);
187 1 }
*** WARNING C280 IN LINE 179 OF DS18B20(LCD).C: 'date2': unreferenced local variable
188 //写地址函数
189 void LCD_set_rc( uchar r, uchar c )
190 {
191 1 uchar address;
192 1 if (r == 1)
193 1 address = 0x80 + c;
194 1 else if(r == 2)
195 1 address = 0xc0 + c;
196 1 write_com( address );
197 1 }
198
199
200 //写一个字符
201 void LCD_write_char(uchar r, uchar c, uchar date)
202 {
203 1 LCD_set_rc( r, c ); //写地址
204 1 write_date( date );
205 1 }
206
207 //向CGRAM写入字模数据
208 void write_CGRAM( uchar TAB[], uchar n ) //定义输入CGRAM的字模代码，字模的个数
209 {
210 1 uchar tmp;
211 1 uchar i;
212 1 uchar j;
213 1 uchar k;
214 1 tmp = 0x40; //设置CGRAM地址的格式字
215 1 k = 0;
216 1 for( j = 0; j < n; j++)
217 1 {
218 2 for(i = 0; i < 8; i++)
219 2 {
220 3 write_com(tmp + i); // 设置自定义字符的 CGRAM 地址
221 3 write_date(TAB[k]); // 向CGRAM写入自定义字符表的数据
222 3 k++;
223 3 }
224 2 tmp = tmp + 0x08;
225 2 }
226 1 }
227 void main()
228 {
229 1 init();
230 1 do
231 1 {
232 2 write_CGRAM(tab, 2);
233 2 tmp();
234 2 tmpchange();
235 2 write_tmp(10,bai);
236 2 LCD_write_char(2, 12, 1);
237 2 write_tmp1(13,ge);
238 2 LCD_write_char(2, 14, 0); //显示℃
239 2
C51 COMPILER V8.08 DS18B20_LCD_ 10/05/2008 16:26:09 PAGE 5
240 2
241 2 }
242 1 while(1);
243 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 664 ----
CONSTANT SIZE = 16 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 9 15
IDATA SIZE = ---- ----
BIT SIZE = ---- 2
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 2 WARNING(S), 0 ERROR(S)
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