📄 ds1302.lst
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198 1 ReadValue = Read1302(DS1302_SECOND);
199 1 Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
200 1 ReadValue = Read1302(DS1302_MINUTE);
201 1 Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
202 1 ReadValue = Read1302(DS1302_HOUR);
203 1 Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
204 1 ReadValue = Read1302(DS1302_DAY);
205 1 Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
206 1 ReadValue = Read1302(DS1302_WEEK);
207 1 Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
208 1 ReadValue = Read1302(DS1302_MONTH);
209 1 Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
210 1 ReadValue = Read1302(DS1302_YEAR);
211 1 Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
212 1 }
213
214 void DateToStr(SYSTEMTIME *Time) //将时间年,月,日,星期数据转换成液晶显示字符串,放到数组里DateString[]
215 { 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 2
-007/07/22
216 1 {
217 2 Time->DateString[0] = '2';
218 2 Time->DateString[1] = '0';
219 2 Time->DateString[2] = Time->Year/10 + '0';
220 2 Time->DateString[3] = Time->Year%10 + '0';
221 2 }
222 1 else
223 1 {
224 2 Time->DateString[0] = ' ';
225 2 Time->DateString[1] = ' ';
226 2 Time->DateString[2] = ' ';
227 2 Time->DateString[3] = ' ';
228 2 }
229 1 Time->DateString[4] = '/';
230 1 if(hide_month<2)
231 1 {
232 2 Time->DateString[5] = Time->Month/10 + '0';
233 2 Time->DateString[6] = Time->Month%10 + '0';
234 2 }
235 1 else
236 1 {
237 2 Time->DateString[5] = ' ';
238 2 Time->DateString[6] = ' ';
239 2 }
240 1 Time->DateString[7] = '/';
C51 COMPILER V7.06 DS1302 01/07/2009 18:08:46 PAGE 5
241 1 if(hide_day<2)
242 1 {
243 2 Time->DateString[8] = Time->Day/10 + '0';
244 2 Time->DateString[9] = Time->Day%10 + '0';
245 2 }
246 1 else
247 1 {
248 2 Time->DateString[8] = ' ';
249 2 Time->DateString[9] = ' ';
250 2 }
251 1 if(hide_week<2)
252 1 {
253 2 week_value[0] = Time->Week%10 + '0'; //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
254 2 }
255 1 else
256 1 {
257 2 week_value[0] = ' ';
258 2 }
259 1 week_value[1] = '\0';
260 1
261 1 Time->DateString[10] = '\0'; //字符串末尾加 '\0' ,判断结束字符
262 1 }
263
264 void TimeToStr(SYSTEMTIME *Time) //将时,分,秒数据转换成液晶显示字符放到数组 TimeString[];
265 { if(hide_hour<2)
266 1 {
267 2 Time->TimeString[0] = Time->Hour/10 + '0';
268 2 Time->TimeString[1] = Time->Hour%10 + '0';
269 2 }
270 1 else
271 1 {
272 2 Time->TimeString[0] = ' ';
273 2 Time->TimeString[1] = ' ';
274 2 }
275 1 Time->TimeString[2] = ':';
276 1 if(hide_min<2)
277 1 {
278 2 Time->TimeString[3] = Time->Minute/10 + '0';
279 2 Time->TimeString[4] = Time->Minute%10 + '0';
280 2 }
281 1 else
282 1 {
283 2 Time->TimeString[3] = ' ';
284 2 Time->TimeString[4] = ' ';
285 2 }
286 1 Time->TimeString[5] = ':';
287 1 if(hide_sec<2)
288 1 {
289 2 Time->TimeString[6] = Time->Second/10 + '0';
290 2 Time->TimeString[7] = Time->Second%10 + '0';
291 2 }
292 1 else
293 1 {
294 2 Time->TimeString[6] = ' ';
295 2 Time->TimeString[7] = ' ';
296 2 }
297 1 Time->DateString[8] = '\0';
298 1 }
299
300 void Initial_DS1302(void) //时钟芯片初始化
301 {
C51 COMPILER V7.06 DS1302 01/07/2009 18:08:46 PAGE 6
302 1 unsigned char Second=Read1302(DS1302_SECOND);
303 1 if(Second&0x80) //判断时钟芯片是否关闭
304 1 {
305 2 Write1302(0x8e,0x00); //写入允许
306 2 Write1302(0x8c,0x07); //以下写入初始化时间 日期:07/07/25.星期: 3. 时间: 23:59:55
307 2 Write1302(0x88,0x07);
308 2 Write1302(0x86,0x25);
309 2 Write1302(0x8a,0x07);
310 2 Write1302(0x84,0x23);
311 2 Write1302(0x82,0x59);
312 2 Write1302(0x80,0x55);
313 2 Write1302(0x8e,0x80); //禁止写入
314 2 }
315 1
316 1 }
317
318 /***********ds18b20子程序*************************/
319
320 /***********ds18b20延迟子函数（晶振12MHz ）*******/
321
322 void delay_18B20(unsigned int i)
323 {
324 1 while(i--);
325 1 }
326
327 /**********ds18b20初始化函数**********************/
328
329 void Init_DS18B20(void)
330 {
331 1 unsigned char x=0;
332 1 DQ = 1; //DQ复位
333 1 delay_18B20(8); //稍做延时
334 1 DQ = 0; //单片机将DQ拉低
335 1 delay_18B20(80); //精确延时 大于 480us
336 1 DQ = 1; //拉高总线
337 1 delay_18B20(14);
338 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
339 1 delay_18B20(20);
340 1 }
341
342 /***********ds18b20读一个字节**************/
343
344 unsigned char ReadOneChar(void)
345 {
346 1 uchar i=0;
347 1 uchar dat = 0;
348 1 for (i=8;i>0;i--)
349 1 {
350 2 DQ = 0; // 给脉冲信号
351 2 dat>>=1;
352 2 DQ = 1; // 给脉冲信号
353 2 if(DQ)
354 2 dat|=0x80;
355 2 delay_18B20(4);
356 2 }
357 1 return(dat);
358 1 }
359
360 /*************ds18b20写一个字节****************/
361
362 void WriteOneChar(uchar dat)
363 {
C51 COMPILER V7.06 DS1302 01/07/2009 18:08:46 PAGE 7
364 1 unsigned char i=0;
365 1 for (i=8; i>0; i--)
366 1 {
367 2 DQ = 0;
368 2 DQ = dat&0x01;
369 2 delay_18B20(5);
370 2 DQ = 1;
371 2 dat>>=1;
372 2 }
373 1 }
374
375 /**************读取ds18b20当前温度************/
376
377 void ReadTemp(void)
378 {
379 1 unsigned char a=0;
380 1 unsigned char b=0;
381 1 unsigned char t=0;
382 1
383 1 Init_DS18B20();
384 1 WriteOneChar(0xCC); // 跳过读序号列号的操作
385 1 WriteOneChar(0x44); // 启动温度转换
386 1
387 1 delay_18B20(100); // this message is wery important
388 1
389 1 Init_DS18B20();
390 1 WriteOneChar(0xCC); //跳过读序号列号的操作
391 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
392 1
393 1 delay_18B20(100);
394 1
395 1 a=ReadOneChar(); //读取温度值低位
396 1 b=ReadOneChar(); //读取温度值高位
397 1 temp_value=b<<4;
398 1 temp_value+=(a&0xf0)>>4;
399 1 }
400 void temp_to_str() //温度数据转换成液晶字符显示
401 {
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