📄 ds1302.lst
字号:
232 1 uchar ReadValue;
233 1 ReadValue = Read1302(DS1302_SECOND);
234 1 Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);//转换为相应的10进制数
235 1 ReadValue = Read1302(DS1302_MINUTE);
236 1 Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
237 1 ReadValue = Read1302(DS1302_HOUR);
238 1 Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
239 1 ReadValue = Read1302(DS1302_DAY);
240 1 Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
C51 COMPILER V7.06 DS1302 02/28/2009 00:12:56 PAGE 5
241 1 ReadValue = Read1302(DS1302_WEEK);
242 1 Time->Week = ((ReadValue&0x10)>>4)*10 + (ReadValue&0x0F);
243 1 ReadValue = Read1302(DS1302_MONTH);
244 1 Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
245 1 ReadValue = Read1302(DS1302_YEAR);
246 1 Time->Year = ((ReadValue&0xf0)>>4)*10 + (ReadValue&0x0F);
247 1 }
248
249 //******************************************
250 //将时间年,月,日,星期数据转换成液
251 //晶显示字符串,放到数组里DateString[]
252 //******************************************
253 void DateToStr(SYSTEMTIME *Time)
254 {
255 1 uchar tab[ ]={0XD2,0XBB,0XB6,0XFE,0XC8,0XFD,0XCB,0XC4,0XCE,0XE5,0XC1,0XF9,0XC8,0XD5};
256 1 if(hide_year<2) //这里的if,else语句都是判断位闪烁,<2显示数据,>2就不显示,输出字符串为 2008/08/0
-3
257 1 {
258 2 Time->DateString[0] = '2';
259 2 Time->DateString[1] = '0';
260 2 Time->DateString[2] = Time->Year/10 + '0';
261 2 Time->DateString[3] = Time->Year%10 + '0';
262 2 }
263 1 else
264 1 {
265 2 Time->DateString[0] = ' ';
266 2 Time->DateString[1] = ' ';
267 2 Time->DateString[2] = ' ';
268 2 Time->DateString[3] = ' ';
269 2 }
270 1 Time->DateString[4]='-';
271 1 if(hide_month<2)
272 1 {
273 2 Time->DateString[5] = Time->Month/10 + '0';
274 2 Time->DateString[6] = Time->Month%10 + '0';
275 2 }
276 1 else
277 1 {
278 2 Time->DateString[5] = ' ';
279 2 Time->DateString[6] = ' ';
280 2 }
281 1 Time->DateString[7]='-';
282 1 if(hide_day<2)
283 1 {
284 2 Time->DateString[8] = Time->Day/10 + '0';
285 2 Time->DateString[9] = Time->Day%10 + '0';
286 2 }
287 1 else
288 1 {
289 2 Time->DateString[8] = ' ';
290 2 Time->DateString[9] = ' ';
291 2 }
292 1 if(hide_week<2)
293 1 {
294 2 week_value[0] =tab[2*(Time->Week%10)-2]; //星期的数据另外放到 week_value[]数组里,跟年,月,日的分开存放,
-因为等一下要在最后显示
295 2 week_value[1] =tab[2*(Time->Week%10)-1];
296 2 }
297 1 else
298 1 {
299 2 week_value[0] = ' ';
300 2 week_value[1]=' ';
C51 COMPILER V7.06 DS1302 02/28/2009 00:12:56 PAGE 6
301 2 }
302 1 week_value[2] = '\0';
303 1
304 1 Time->DateString[10] = '\0'; //字符串末尾加 '\0' ,判断结束字符
305 1 }
306
307 //******************************************
308 //将时,分,秒数据转换成液晶
309 //显示字符放到数组 TimeString[]
310 //*****************************************
311 void TimeToStr(SYSTEMTIME *Time)
312 { if(hide_hour<2)
313 1 {
314 2 Time->TimeString[0] = Time->Hour/10 + '0';
315 2 Time->TimeString[1] = Time->Hour%10 + '0';
316 2 }
317 1 else
318 1 {
319 2 Time->TimeString[0] = ' ';
320 2 Time->TimeString[1] = ' ';
321 2 }
322 1 Time->TimeString[2] = ':';
323 1 if(hide_min<2)
324 1 {
325 2 Time->TimeString[3] = Time->Minute/10 + '0';
326 2 Time->TimeString[4] = Time->Minute%10 + '0';
327 2 }
328 1 else
329 1 {
330 2 Time->TimeString[3] = ' ';
331 2 Time->TimeString[4] = ' ';
332 2 }
333 1 Time->TimeString[5] = ':';
334 1 if(hide_sec<2)
335 1 {
336 2 Time->TimeString[6] = Time->Second/10 + '0';
337 2 Time->TimeString[7] = Time->Second%10 + '0';
338 2 }
339 1 else
340 1 {
341 2 Time->TimeString[6] = ' ';
342 2 Time->TimeString[7] = ' ';
343 2 }
344 1 Time->TimeString[8] = '\0';
345 1 }
346
347 //******************************
348 //时钟芯片初始化
349 //******************************
350 void Initial_DS1302(void)
351 {
352 1 uchar Second=Read1302(DS1302_SECOND);
353 1 if(Second&0x80) //判断时钟芯片是否关闭
354 1 {
355 2 Write1302(0x8e,0x00); //写入允许
356 2 Write1302(0x8c,0x08); //以下写入初始化时间 日期:08/08/03.星期: 3. 时间: 17:59:50
357 2 Write1302(0x88,0x08);
358 2 Write1302(0x86,0x03);
359 2 Write1302(0x8a,0x07);
360 2 Write1302(0x84,0x17);
361 2 Write1302(0x82,0x59);
362 2 Write1302(0x80,0x50);
C51 COMPILER V7.06 DS1302 02/28/2009 00:12:56 PAGE 7
363 2 Write1302(0x8e,0x80); //禁止写入
364 2 }
365 1
366 1 }
367
368 //****************************************
369 //ds18b20子程序模块
370 //****************************************
371
372
373 /***********ds18b20子程序*************************/
374
375 /***********ds18b20延迟子函数（晶振12MHz ）*******/
376
377 void delay_18B20(unsigned int i)
378 {
379 1 while(i--);
380 1 }
381
382 /**********ds18b20初始化函数**********************/
383
384 void Init_DS18B20(void)
385 {
386 1 unsigned char x=0;
387 1 DQ = 1; //DQ复位
388 1 delay_18B20(8); //稍做延时
389 1 DQ = 0; //单片机将DQ拉低
390 1 delay_18B20(40); //精确延时 大于 480us
391 1 DQ = 1; //拉高总线
392 1 delay_18B20(7);
393 1 x=DQ; //稍做延时后 如果x=0则初始化成功 x=1则初始化失败
394 1 delay_18B20(10);
395 1 }
396
397 /***********ds18b20读一个字节**************/
398
399 uchar ReadOneChar(void)
400 {
401 1 uchar i=0;
402 1 uchar dat = 0;
403 1 for (i=8;i>0;i--)
404 1 {
405 2 DQ = 0; // 给脉冲信号
406 2 dat>>=1;
407 2 DQ = 1; // 给脉冲信号
408 2 if(DQ)
409 2 dat|=0x80;
410 2 delay_18B20(4);
411 2 }
412 1 return(dat);
413 1 }
414
415 /*************ds18b20写一个字节****************/
416
417 void WriteOneChar(uchar dat)
418 {
419 1 uchar i=0;
420 1 for (i=8; i>0; i--)
421 1 {
422 2 DQ = 0;
423 2 DQ = dat&0x01;
424 2 delay_18B20(5);
C51 COMPILER V7.06 DS1302 02/28/2009 00:12:56 PAGE 8
425 2 DQ = 1;
426 2 dat>>=1;
427 2 }
428 1 }
429
430 /**************读取ds18b20当前温度************/
431
432 void ReadTemp(void)
433 {
434 1 uchar a=0;
435 1 uchar b=0;
436 1 uchar t;
437 1
438 1 Init_DS18B20();
439 1 WriteOneChar(0xCC); // 跳过读序号列号的操作
440 1 WriteOneChar(0x44); // 启动温度转换
441 1
442 1 delay_18B20(100); // this message is wery important
443 1
444 1 Init_DS18B20();
445 1 WriteOneChar(0xCC); //跳过读序号列号的操作
446 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
447 1
448 1 delay_18B20(50);
449 1
450 1 a=ReadOneChar(); //读取温度值低位
451 1 b=ReadOneChar(); //读取温度值高位
452 1 t=b&0xf8;
453 1 if(t)
454 1 {
455 2 TempBuffer[0]=':';
456 2 TempBuffer[1]='-';
457 2 temp_value=b<<4;
458 2 temp_value+=(a&0xf0)>>4;
459 2 temp_value=~temp_value+1;
460 2 temp1_value=~a&0x0f;
461 2 }
462 1 else
463 1 {
464 2 temp_value=b<<4;
465 2 temp_value+=(a&0xf0)>>4;
466 2 temp1_value=a&0x0f;
467 2 TempBuffer[0]=':';
468 2 TempBuffer[1]=temp_value/100+'0'; //百位
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