📄 text2.lst
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212 void xianshi(unsigned long a)
213 { unsigned long c,p=0;
214 1 if (a!=0)
215 1 { c=a/100000000;
216 2 if(c!=0)
217 2 {lcd1602_wrdata(c+0x30);
218 3 p=1;
219 3 }
220 2 delay(100);
221 2 c=(a%100000000)/10000000;
222 2 if(c!=0 || p==1 )
223 2 {lcd1602_wrdata(c+0x30);
224 3 p=1;
225 3 }
226 2 delay(100);
227 2 c=(a%10000000)/1000000;
228 2 if(c!=0 || p==1 )
229 2 {lcd1602_wrdata(c+0x30);
230 3 p=1;
231 3 }
232 2 delay(100);
233 2 c=(a%1000000)/100000;
234 2 if(c!=0 || p==1 )
235 2 {lcd1602_wrdata(c+0x30);
236 3 p=1;
237 3 }
238 2 delay(100);
239 2 c=(a%100000)/10000;
240 2 if(c!=0 || p==1 )
241 2 {lcd1602_wrdata(c+0x30);
C51 COMPILER V7.20 TEXT2 07/21/2007 13:47:15 PAGE 5
242 3 p=1;
243 3 }
244 2 delay(100);
245 2 c=(a%10000)/1000;
246 2 if(c!=0 || p==1)
247 2 {lcd1602_wrdata(c+0x30);
248 3 }
249 2 delay(100);
250 2 c=(a%1000)/100;
251 2 if(c!=0 || p==1)
252 2 {lcd1602_wrdata(c+0x30);
253 3 }
254 2 delay(100);
255 2 c=(a%100)/10;
256 2 if(c!=0 || p==1)
257 2 {lcd1602_wrdata(c+0x30);
258 3 }
259 2 delay(100);
260 2 c=a%10+0x30;
261 2 lcd1602_wrdata(c);
262 2 delay(100);
263 2
264 2 }
265 1 }
266
267
268
269
270
271 void delay1820(unsigned int i)
272 {
273 1 while(i--);
274 1 }
275
276 //初始化函数
277 Init_DS18B20(void)
278 {
279 1 wtdg=!wtdg;
280 1 DQ = 1; //DQ复位
281 1 delay1820(8); //稍做延时
282 1 DQ = 0; //单片机将DQ拉低
283 1 delay1820(80); //精确延时 大于 480us
284 1 DQ = 1; //拉高总线
285 1 delay1820(14);
286 1 xbz=DQ; //稍做延时后 如果x=0则初始化成功 x=1则初始化失败
287 1 delay1820(20);
288 1 DQ=1;
289 1 }
290
291 //读一个字节
292 ReadOneChar(void)
293 {
294 1 unsigned char i=0;
295 1 unsigned char dat = 0;
296 1 wtdg=!wtdg;
297 1 for (i=8;i>0;i--)
298 1 {
299 2 DQ = 0; // 给脉冲信号
300 2 dat>>=1;
301 2 DQ = 1; // 给脉冲信号
302 2 if(DQ)
303 2 dat|=0x80;
C51 COMPILER V7.20 TEXT2 07/21/2007 13:47:15 PAGE 6
304 2 delay1820(4);
305 2 }
306 1 return(dat);
307 1 }
308
309 //写一个字节
310 WriteOneChar(unsigned char dat)
311 {
312 1 unsigned char i=0;
313 1 wtdg=!wtdg;
314 1 for (i=8; i>0; i--)
315 1 {
316 2 DQ = 0;
317 2 DQ = dat&0x01;
318 2 delay1820(5);
319 2 DQ = 1;
320 2 dat>>=1;
321 2 }
322 1 delay(4);
323 1 }
324
325 void Config18b20()
326 {
327 1 Init_DS18B20();
328 1 WriteOneChar(0xcc); //skip rom
329 1 WriteOneChar(0x4e); //write scratchpad
330 1 WriteOneChar(0x55); //上限
331 1 WriteOneChar(0x00); //下限
332 1 WriteOneChar(0x7f); //set 11 bit (0.125)
333 1 Init_DS18B20();
334 1 WriteOneChar(0xcc); //skip rom
335 1 WriteOneChar(0x48); //保存设定值
336 1 Init_DS18B20();
337 1 WriteOneChar(0xcc); //skip rom
338 1 WriteOneChar(0xb8); //回调设定值
339 1 }
340
341 uint ReadTemperature()
342 {
343 1 unsigned char a=0;
344 1 unsigned char b=0;
345 1 unsigned char t=0;
346 1 unsigned int g;
347 1 Config18b20();
348 1 Init_DS18B20();
349 1 WriteOneChar(0xCC); // 跳过读序号列号的操作
350 1 WriteOneChar(0x44); // 启动温度转换
351 1 delay(500);
352 1 Init_DS18B20();
353 1 WriteOneChar(0xCC); //跳过读序号列号的操作
354 1 WriteOneChar(0xBE); //读取温度寄存器等（共可读9个寄存器） 前两个就是温度
355 1 a=ReadOneChar(); //读取温度值低位
356 1 b=ReadOneChar(); //读取温度值高位
357 1 DQ=1;
358 1 g=b<<8; //最终数据在a和b中，怎么处理你自己用吧 呵呵
359 1 g=g|a;
360 1 g=g*0.625; //这是转换成具体温度值，1点代表0.625°C
361 1 return(g);
362 1 }
363
364 void main()
365 {
C51 COMPILER V7.20 TEXT2 07/21/2007 13:47:15 PAGE 7
366 1
367 1 uchar i;
368 1 // uint t;
369 1 uchar s1[]="tempretrue:";
370 1
371 1 uchar str0='7';
372 1 uchar str1='4';
373 1 uchar str2='1';
374 1 uchar str3=' ';
375 1 uchar str4='8';
376 1 uchar str5='5';
377 1 uchar str6='2';
378 1 uchar str7='0';
379 1 uchar str8='9';
380 1 uchar str9='6';
381 1 uchar str10='3';
382 1 uchar str11='=';
383 1 uchar str12='/';
384 1 uchar str13='*';
385 1 uchar str14='-';
386 1 uchar str15='+';
387 1 unsigned long c,a=0,b,t;
388 1 uchar j; //标记加减乘除
389 1
390 1
391 1
392 1 unsigned char offset=0x80; //定义一个偏移地址变量，lcd1602 写入控制字时用到
393 1 unsigned char key;
394 1 // unsigned int count1=10;
395 1 // unsigned int count2=297;
396 1
397 1 delay(2);
398 1 lcd1602_bus=0xff;
399 1 lcd1602_init();
400 1 lcd1602_wrcmd(offset+0x00);
401 1 for(i=0;i<10;i++) lcd1602_wrdata(s1[i]);
402 1 t=ReadTemperature();
403 1 xianshi(t);
404 1 // for(i=0;i<2;i++) lcd1602_wrdata(s2[i]+0x30);
405 1 // lcd1602_wrcmd(offset+0x40);
406 1 // for(i=0;i<11;i++) lcd1602_wrdata(str02[i]);
407 1
408 1 // lcd1602_clear();
409 1
410 1
411 1 }
*** WARNING C280 IN LINE 387 OF TEXT2.C: 'c': unreferenced local variable
*** WARNING C280 IN LINE 387 OF TEXT2.C: 'b': unreferenced local variable
*** WARNING C280 IN LINE 388 OF TEXT2.C: 'j': unreferenced local variable
*** WARNING C280 IN LINE 393 OF TEXT2.C: 'key': unreferenced local variable
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 1409 ----
CONSTANT SIZE = 136 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 2 55
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 4 WARNING(S), 0 ERROR(S)
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