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標(biāo)題: 51單片機(jī) 12864顯示溫濕度 [打印本頁(yè)]

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作者: qwertasdfg    時(shí)間: 2016-9-13 14:10
標(biāo)題: 51單片機(jī) 12864顯示溫濕度

1. #include <reg51.h>
   
2. #include <intrins.h>
   
3. #define uint unsigned int
   
4. #define uchar unsigned char
   
5. #define noACK 0
   
6. #define ACK 1
   
7. #define STATUS_REG_W 0x06
   
8. #define STATUS_REG_R 0x07
   
9. #define MEASURE_TEMP 0x03
   
10. #define MEASURE_HUMI 0x05
    
11. #define RESET 0x1e
    
12. enum {TEMP,HUMI};
    
13. typedef union  
    
14. {
    
15. unsigned int i;
    
16. float f;
    
17. }
    
18. value;
    
19. sbit lcdrs=P2^0;
    
20. sbit lcdrw=P2^1;
    
21. sbit lcden=P2^2;
    
22. sbit SCK = P1^0;
    
23. sbit DATA = P1^1;
    
24. uchar table2[]="SHT11 ";
    
25. uchar table3[]="";
    
26. uchar table4[]="";
    
27. uchar table5[]=".";
    
28. uchar wendu[6];
    
29. uchar shidu[6];
    
30. void delay(int z)
    
31. {
    
32. int x,y;
    
33. for(x=z;x>0;x--)
    
34. for(y=125;y>0;y--);
    
35. }
    
36. 
    
37. void delay_50us(uint t)
    
38. {
    
39. uint j;
    
40. for(;t>0;t--)
    
41. for(j=19;j>0;j--);
    
42. }
    
43. void delay_50ms(uint t)
    
44. {
    
45. uint j;
    
46. for(;t>0;t--)
    
47. for(j=6245;j>0;j--);
    
48. }
    
49. 
    
50. void write_12864com(uchar com)
    
51. {
    
52. lcdrs=0;
    
53. lcdrw=0;
    
54. delay_50us(1);
    
55. P0=com;
    
56. lcden=1;
    
57. delay_50us(10);
    
58. lcden=0;
    
59. delay_50us(2);
    
60. }
    
61. void write_dat(uchar dat)
    
62. {
    
63. lcdrs=1;
    
64. lcdrw=0;
    
65. delay_50us(1);
    
66. P0=dat;
    
67. lcden=1;
    
68. delay_50us(10);
    
69. lcden=0;
    
70. delay_50us(2);
    
71. }
    
72. 
    
73. void init12864lcd(void)
    
74. {
    
75. delay_50ms(2);
    
76. write_12864com(0x30);
    
77. delay_50us(4);
    
78. write_12864com(0x30);
    
79. delay_50us(4);
    
80. write_12864com(0x0f);
    
81. delay_50us(4);
    
82. write_12864com(0x01);
    
83. delay_50us(240);
    
84. write_12864com(0x06);
    
85. delay_50us(10);
    
86. write_12864com(0x0c);
    
87. delay_50us(10);
    
88. }
    
89. 
    
90. void display1(void)
    
91. {
    
92. uchar i;
    
93. write_12864com(0x80);
    
94. for(i=0;i<18;i++)
    
95. {
    
96. write_dat(table2[i]);
    
97. delay_50us(1);
    
98. }
    
99. }
    
100. 
     
101. void display2(void)
     
102. {
     
103. uchar i;
     
104. write_12864com(0x90);
     
105. for(i=0;i<18;i++)
     
106. {
     
107. write_dat(table3[i]);
     
108. delay_50us(1);
     
109. }
     
110. }
     
111. void display3(void)
     
112. {
     
113. uchar i;
     
114. write_12864com(0x88);
     
115. for(i=0;i<8;i++)
     
116. {
     
117. write_dat(table4[i]);
     
118. delay_50us(1);
     
119. }
     
120. }
     
121. 
     
122. 
     
123. void displaywendu(void)
     
124. {
     
125. uchar i;
     
126. write_12864com(0x94);
     
127. for(i=0;i<3;i++)
     
128. {
     
129. write_dat(wendu[i]);
     
130. delay_50us(1);
     
131. }
     
132. for(i=0;i<1;i++)
     
133. {
     
134. write_dat(table5[i]);
     
135. delay_50us(1);
     
136. }
     
137. for(i=4;i<5;i++)
     
138. {
     
139. write_dat(wendu[i]);
     
140. delay_50us(1);
     
141. }
     
142. }
     
143. 
     
144. void displayshidu(void)
     
145. {
     
146. uchar i;
     
147. write_12864com(0x8C);
     
148. for(i=0;i<3;i++)
     
149. {
     
150. write_dat(shidu[i]);
     
151. delay_50us(1);
     
152. }
     
153. for(i=0;i<1;i++)
     
154. {
     
155. write_dat(table5[i]);
     
156. delay_50us(1);
     
157. }
     
158. for(i=4;i<5;i++)
     
159. {
     
160. write_dat(shidu[i]);
     
161. delay_50us(1);
     
162. }
     
163. }
     
164. char s_write_byte(unsigned char value)
     
165. {
     
166. unsigned char i,error=0;
     
167. for (i=0x80;i>0;i>>=1)
     
168. {
     
169. if (i&value) DATA=1;
     
170. else DATA=0;
     
171. SCK=1;
     
172. _nop_();
     
173.   _nop_();
     
174.   _nop_();
     
175. SCK=0;
     
176. }
     
177. DATA=1;
     
178. SCK=1;
     
179. error=DATA;  
     
180. _nop_();
     
181. _nop_();
     
182. _nop_();
     
183. SCK=0;
     
184. DATA=1;
     
185. return error;
     
186. }
     
187. 
     
188. char s_read_byte(unsigned char ack)
     
189. {
     
190. unsigned char i,val=0;
     
191. DATA=1;
     
192. for(i=0x80;i>0;i>>=1)
     
193. {
     
194. SCK=1;
     
195. if(DATA) val=(val|i);  
     
196. SCK=0;
     
197. }
     
198. DATA=!ack;
     
199. SCK=1;
     
200. _nop_();
     
201. _nop_();
     
202. _nop_();
     
203. SCK=0;
     
204. _nop_();
     
205. _nop_();
     
206. _nop_();
     
207. DATA=1;
     
208. return val;
     
209. }
     
210. 
     
211. void s_transstart(void)
     
212. {
     
213. DATA=1; SCK=0;
     
214. _nop_();
     
215. SCK=1;
     
216. _nop_();
     
217. DATA=0;
     
218. _nop_();
     
219. SCK=0;
     
220. _nop_();
     
221. _nop_();
     
222. _nop_();
     
223. SCK=1;
     
224. _nop_();
     
225. DATA=1;
     
226. _nop_();
     
227. SCK=0;
     
228. }
     
229. 
     
230. void s_connectionreset(void)
     
231. {
     
232. unsigned char i;
     
233. DATA=1; SCK=0;
     
234. for(i=0;i<9;i++)
     
235. {
     
236. SCK=1;
     
237. SCK=0;
     
238. }
     
239. s_transstart();
     
240. }
     
241. char s_measure(unsigned char *p_value, unsigned char *p_checksum,unsigned char mode)
     
242. {
     
243. unsigned error=0;
     
244. unsigned int i;
     
245. s_transstart();
     
246. switch(mode)  
     
247.   {
     
248. //case TEMP : error+=s_write_byte(MEASURE_TEMP); break;
     
249. case HUMI : error+=s_write_byte(MEASURE_HUMI); break;  
     
250. default : break;
     
251. }
     
252. for (i=0;i<65535;i++) if(DATA==0) break;
     
253. if(DATA) error+=1;
     
254. *(p_value) =s_read_byte(ACK);
     
255. *(p_value+1)=s_read_byte(ACK);
     
256.   *p_checksum =s_read_byte(noACK);
     
257. return error;
     
258. }
     
259. void calc_sth10(float *p_humidity ,float *p_temperature)
     
260. {
     
261. const float C1=-4.0;
     
262. const float C2=+0.0405;
     
263. const float C3=-0.0000028;  
     
264. const float T1=+0.01;
     
265. const float T2=+0.00008;
     
266. float rh=*p_humidity;
     
267. float t=*p_temperature;
     
268. float rh_lin;  
     
269. float rh_true;
     
270. float t_C;  
     
271. t_C=t*0.01 - 40;
     
272. rh_lin=C3*rh*rh + C2*rh + C1;
     
273. rh_true=(t_C-25)*(T1+T2*rh)+rh_lin;  
     
274. if(rh_true>100)rh_true=100;
     
275. if(rh_true<0.1)rh_true=0.1;
     
276. *p_temperature=t_C;
     
277. *p_humidity=rh_true;
     
278. }
     
279. void main(void)
     
280. {
     
281. unsigned int temp,humi;
     
282. value humi_val,temp_val;
     
283. unsigned char error;
     
284. unsigned char checksum;  
     
285. init12864lcd();
     
286. display1();
     
287. display2();
     
288. display3();
     
289. s_connectionreset();  
     
290. while(1)
     
291. {
     
292. error=0;
     
293. error+=s_measure((unsigned char*)&temp_val.i,&checksum,TEMP);
     
294. error+=s_measure((unsigned char*)&humi_val.i,&checksum,HUMI);  
     
295. if(error!=0) s_connectionreset();
     
296. else
     
297. {
     
298. humi_val.f=(float)humi_val.i;
     
299. temp_val.f=(float)temp_val.i;
     
300. calc_sth10(&humi_val.f,&temp_val.f);
     
301. temp=temp_val.f*10;
     
302. humi=humi_val.f*10;
     
303. wendu[0]=temp/1000+'0';
     
304. wendu[1]=temp%1000/100+'0';
     
305. wendu[2]=temp%100/10+'0';
     
306. wendu[3]=0x2E;
     
307. wendu[4]=temp%10+'0';
     
308. displaywendu();
     
309. shidu[0]=humi/1000+'0';
     
310. shidu[1]=humi%1000/100+'0';
     
311. shidu[2]=humi%100/10+'0';  
     
312. shidu[3]=0x2E;
     
313. shidu[4]=humi%10+'0';
     
314. displayshidu();
     
315. }
     
316. delay(800);
     
317. }
     
318. }
     
319. 
     
320. 
     

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