📄 lcd18b20test.lst
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C51 COMPILER V7.06 LCD18B20TEST 04/20/2009 01:51:16 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE LCD18B20TEST
OBJECT MODULE PLACED IN LCD18B20test.OBJ
COMPILER INVOKED BY: D:\mcu\C51\BIN\C51.EXE LCD18B20test.c BROWSE DEBUG OBJECTEXTEND
stmt level source
1 #include <at89x51.h>
2 #define uchar unsigned char
3 #define uint unsigned int
4 #define uchar unsigned char
5 #define uint unsigned int
6 unsigned char i;
7 sbit DQ=P3^0;//ds18b20与单片机连接口
8 uchar disdata[5];
9 idata uint tvalue;//温度值
10 idata uchar tflag;//温度正负标志
11
12 sbit rs=P3^2;
13 sbit rw=P3^3;
14 sbit en=P3^4;
15 sbit key_left=P1^0;
16 sbit key_right=P1^1;
17
18
19 uchar code opens[]="MACROSS";
20 uchar code opens1[]="FRONTIER";
21 uchar code hanzi[3][8]={0x1f,0x11,0x11,0x1f,0x11,0x11,0x1f,0x00,
22 0x0f,0x09,0x0f,0x09,0x0f,0x09,0x11,0x00,
23 0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02};
24 void open();
25 void ini();
26 void write_order(uchar order);
27 void write_date(uchar date);
28 void delay(uchar z);
29 void writeCG();
30 /******************************ds1820程序***************************************/
31
32 void ini()
33 {
34 1 rw=0;
35 1 en=0;
36 1 P1=0xff;
37 1 writeCG();
38 1 write_order(0x38);
39 1 write_order(0x0c);
40 1 write_order(0x06);
41 1 write_order(0x01);
42 1
43 1
44 1 }
45 void write_order(uchar order)
46 {
47 1 rs=0;
48 1 P2=order;
49 1 delay(4);
50 1 en=1;
51 1 delay(4);
52 1 en=0;
53 1 }
54 void write_date(uchar date)
55 {
C51 COMPILER V7.06 LCD18B20TEST 04/20/2009 01:51:16 PAGE 2
56 1 rs=1;
57 1 P2=date;
58 1 delay(4);
59 1 en=1;
60 1 delay(4);
61 1 en=0;
62 1 }
63 void delay(uchar z)
64 {
65 1 uchar x,y;
66 1 for(x=z;x>0;x--)
67 1 for(y=110;y>0;y--);
68 1 }
69 void writeCG()
70 {
71 1 uchar x,y;
72 1 write_order(0x40);
73 1 for(y=0;y<3;y++)
74 1 {
75 2 for(x=0;x<8;x++)
76 2 {
77 3 write_date(hanzi[y][x]);
78 3 }
79 2 }
80 1
81 1 }
82 void open()
83 {
84 1 uchar num;
85 1 write_order(0x80+0x10);
86 1 for(num=0;opens[num]!='\0';num++)
87 1 {
88 2 write_date(opens[num]);
89 2 delay(20);
90 2 }
91 1
92 1
93 1 for(num=0;num<16;num++)
94 1 {
95 2 write_order(0x1c);
96 2 delay(200);
97 2 }
98 1 for(num=0;num<5;num++)
99 1 {
100 2 write_order(0x18);
101 2 delay(200);
102 2 }
103 1 for(num=0;num<4;num++)
104 1 {
105 2 write_order(0x1c);
106 2 delay(200);
107 2 }
108 1 for(num=0;num<3;num++)
109 1 {
110 2 write_order(0x18);
111 2 delay(200);
112 2 }
113 1 for(num=0;num<2;num++)
114 1 {
115 2 write_order(0x1c);
116 2 delay(200);
117 2 }
C51 COMPILER V7.06 LCD18B20TEST 04/20/2009 01:51:16 PAGE 3
118 1 for(num=0;num<1;num++)
119 1 {
120 2 write_order(0x18);
121 2 delay(100);
122 2 }
123 1 write_order(0x80+0x53);
124 1 for(num=0;opens1[num]!='\0';num++)
125 1 {
126 2 write_date(opens1[num]);
127 2 delay(500);
128 2 }
129 1 }
130
131
132 void delay_18B20(unsigned int t)//延时1微秒
133 {
134 1 while(t--);
135 1 }
136
137 void ds1820rst()/*ds1820复位*/
138 {
139 1 unsigned char x=0;
140 1 DQ = 1; //DQ复位
141 1 delay_18B20(4); //延时
142 1 DQ = 0; //DQ拉低
143 1 delay_18B20(100); //精确延时大于480us
144 1 DQ = 1; //拉高
145 1 delay_18B20(40);
146 1 }
147
148 uchar ds1820rd()/*读数据*///读时间隙
149 {
150 1 unsigned char j=0;
151 1 unsigned char dat = 0;
152 1 for (j=8;j>0;j--)
153 1 {
154 2 DQ = 0; //给脉冲信号
155 2 dat>>=1;
156 2 DQ = 1; //给脉冲信号
157 2 if(DQ)
158 2 dat|=0x80;
159 2 delay_18B20(10);
160 2 }
161 1 return(dat);
162 1 }
163
164 void ds1820wr(uchar wdata)/*写数据*/
165 {
166 1 unsigned char j=0;
167 1 for (j=8; i>0; j--)
168 1 {
169 2 DQ = 0;
170 2 DQ = wdata&0x01;
171 2 delay_18B20(10);
172 2 DQ = 1;
173 2 wdata>>=1;
174 2 }
175 1 }
176
177 read_temp()/*读取温度值并转换*/
178 {
179 1 uchar a,b;
C51 COMPILER V7.06 LCD18B20TEST 04/20/2009 01:51:16 PAGE 4
180 1 ds1820rst();
181 1 ds1820wr(0xcc);//*跳过读序列号*/
182 1 ds1820wr(0x44);//*启动温度转换*/
183 1 ds1820rst();
184 1 ds1820wr(0xcc);//*跳过读序列号*/
185 1 ds1820wr(0xbe);//*读取温度*/
186 1 a=ds1820rd();
187 1 b=ds1820rd();
188 1 tvalue=b;
189 1 tvalue<<=8;
190 1 tvalue=tvalue|a;
191 1 if(tvalue<0x0fff)
192 1 tflag=0;
193 1 else
194 1 {
195 2 tvalue=~tvalue+1;
196 2 tflag=1;
197 2 }
198 1 tvalue=tvalue*(0.625);//温度值扩大10倍，精确到1位小数
199 1 return(tvalue);
200 1 }
201 /*******************************************************************/
202 void ds1820disp()//温度值显示
203 {
204 1 uchar flagdat;
205 1 disdata[0]=tvalue/1000+0x30;//百位数
206 1 disdata[1]=tvalue%1000/100+0x30;//十位数
207 1 disdata[2]=tvalue%100/10+0x30;//个位数
208 1 disdata[3]=tvalue%10+0x30;//小数位
209 1
210 1 if(tflag==0)
211 1 flagdat=0x20;//正温度不显示符号
212 1 else
213 1 flagdat=0x2d;//负温度显示负号:-
214 1 if(disdata[0]==0x30)
215 1 {
216 2 disdata[0]=0x20;//如果百位为0，不显示
217 2 if(disdata[1]==0x30)
218 2 {
219 3 disdata[1]=0x20;//如果百位为0，十位为0也不显示
220 3 }
221 2 }
222 1 write_order(0xc0);
223 1 write_date(flagdat);//显示符号位
224 1 write_order(0xc1);
225 1 write_date(disdata[0]);//显示百位
226 1 write_order(0xc2);
227 1 write_date(disdata[1]);//显示十位
228 1 write_order(0xc3);
229 1 write_date(disdata[2]);//显示个位
230 1 write_order(0xc4);
231 1 write_date(0x2e);//显示小数点
232 1 write_order(0xc5);
233 1 write_date(disdata[3]);//显示小数位
234 1 }
235 /********************主程序***********************************/
236 void main()
237 {
238 1
239 1 while(1)
240 1 {
241 2 read_temp();//读取温度
C51 COMPILER V7.06 LCD18B20TEST 04/20/2009 01:51:16 PAGE 5
242 2 ds1820disp();//显示
243 2 }
244 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 773 ----
CONSTANT SIZE = 41 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 6 5
IDATA SIZE = 3 ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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