📄 ds1302.lst
字号:
201
202
203 void DS1302_GetTime(SYSTEMTIME *Time) //获取时钟芯片的时钟数据到自定义的结构型数组
204 {
205 1 unsigned char ReadValue;
206 1 ReadValue = Read1302(DS1302_SECOND);
207 1 Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
208 1 ReadValue = Read1302(DS1302_MINUTE);
209 1 Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
210 1 ReadValue = Read1302(DS1302_HOUR);
211 1 Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
212 1 ReadValue = Read1302(DS1302_DAY);
213 1 Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
214 1 ReadValue = Read1302(DS1302_WEEK);
215 1 Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
216 1 ReadValue = Read1302(DS1302_MONTH);
217 1 Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
218 1 ReadValue = Read1302(DS1302_YEAR);
219 1 Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
220 1 }
221
222 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[]
223 { 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
224 1 {
225 2 Time->DateString[0] = '2';
226 2 Time->DateString[1] = '0';
227 2 Time->DateString[2] = Time->Year/10 + '0';
228 2 Time->DateString[3] = Time->Year%10 + '0';
229 2 }
230 1 else
231 1 {
232 2 Time->DateString[0] = ' ';
233 2 Time->DateString[1] = ' ';
234 2 Time->DateString[2] = ' ';
235 2 Time->DateString[3] = ' ';
236 2 }
237 1 Time->DateString[4] = '/';
238 1 if(hide_month<2)
239 1 {
240 2 Time->DateString[5] = Time->Month/10 + '0';
C51 COMPILER V7.20 DS1302 09/12/2007 14:29:53 PAGE 5
241 2 Time->DateString[6] = Time->Month%10 + '0';
242 2 }
243 1 else
244 1 {
245 2 Time->DateString[5] = ' ';
246 2 Time->DateString[6] = ' ';
247 2 }
248 1 Time->DateString[7] = '/';
249 1 if(hide_day<2)
250 1 {
251 2 Time->DateString[8] = Time->Day/10 + '0';
252 2 Time->DateString[9] = Time->Day%10 + '0';
253 2 }
254 1 else
255 1 {
256 2 Time->DateString[8] = ' ';
257 2 Time->DateString[9] = ' ';
258 2 }
259 1 if(hide_week<2)
260 1 {
261 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
262 2 }
263 1 else
264 1 {
265 2 week_value[0] = ' ';
266 2 }
267 1 week_value[1] = '\0';
268 1
269 1 Time->DateString[10] = '\0'; //字符串末尾加 '\0' ,判断结束字符
270 1 }
271
272 void TimeToStr(SYSTEMTIME *Time) //将时,分,秒数据转换成液晶显示字符放到数组 TimeString[];
273 { if(hide_hour<2)
274 1 {
275 2 Time->TimeString[0] = Time->Hour/10 + '0';
276 2 Time->TimeString[1] = Time->Hour%10 + '0';
277 2 }
278 1 else
279 1 {
280 2 Time->TimeString[0] = ' ';
281 2 Time->TimeString[1] = ' ';
282 2 }
283 1 Time->TimeString[2] = ':';
284 1 if(hide_min<2)
285 1 {
286 2 Time->TimeString[3] = Time->Minute/10 + '0';
287 2 Time->TimeString[4] = Time->Minute%10 + '0';
288 2 }
289 1 else
290 1 {
291 2 Time->TimeString[3] = ' ';
292 2 Time->TimeString[4] = ' ';
293 2 }
294 1 Time->TimeString[5] = ':';
295 1 if(hide_sec<2)
296 1 {
297 2 Time->TimeString[6] = Time->Second/10 + '0';
298 2 Time->TimeString[7] = Time->Second%10 + '0';
299 2 }
300 1 else
301 1 {
C51 COMPILER V7.20 DS1302 09/12/2007 14:29:53 PAGE 6
302 2 Time->TimeString[6] = ' ';
303 2 Time->TimeString[7] = ' ';
304 2 }
305 1 Time->DateString[8] = '\0';
306 1 }
307
308
309 void Initial_DS1302(void) //时钟芯片初始化
310 {
311 1 unsigned char Second=Read1302(DS1302_SECOND);
312 1 if(Second&0x80) //判断时钟芯片是否关闭
313 1 {
314 2 Write1302(0x8e,0x00); //写入允许
315 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
316 2 Write1302(0x88,0x07);
317 2 Write1302(0x86,0x25);
318 2 Write1302(0x8a,0x07);
319 2 Write1302(0x84,0x23);
320 2 Write1302(0x82,0x59);
321 2 Write1302(0x80,0x55);
322 2 Write1302(0x8e,0x80); //禁止写入
323 2 }
324 1
325 1 }
326
327 /***********ds18b20子程序*************************/
328
329 /***********ds18b20延迟子函数（晶振12MHz ）*******/
330
331 void delay_18B20(unsigned int i)
332 {
333 1 while(i--);
334 1 }
335
336 /**********ds18b20初始化函数**********************/
337
338 void Init_DS18B20(void)
339 {
340 1 unsigned char x=0;
341 1 DQ = 1; //DQ复位
342 1 delay_18B20(8); //稍做延时
343 1 DQ = 0; //单片机将DQ拉低
344 1 delay_18B20(80); //精确延时 大于 480us
345 1 DQ = 1; //拉高总线
346 1 delay_18B20(14);
347 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
348 1 delay_18B20(20);
349 1 }
350
351 /***********ds18b20读一个字节**************/
352
353 unsigned char ReadOneChar(void)
354 {
355 1 uchar i=0;
356 1 uchar dat = 0;
357 1 for (i=8;i>0;i--)
358 1 {
359 2 DQ = 0; // 给脉冲信号
360 2 dat>>=1;
361 2 DQ = 1; // 给脉冲信号
362 2 if(DQ)
363 2 dat|=0x80;
C51 COMPILER V7.20 DS1302 09/12/2007 14:29:53 PAGE 7
364 2 delay_18B20(4);
365 2 }
366 1 return(dat);
367 1 }
368
369 /*************ds18b20写一个字节****************/
370
371 void WriteOneChar(uchar dat)
372 {
373 1 unsigned char i=0;
374 1 for (i=8; i>0; i--)
375 1 {
376 2 DQ = 0;
377 2 DQ = dat&0x01;
378 2 delay_18B20(5);
379 2 DQ = 1;
380 2 dat>>=1;
381 2 }
382 1 }
383
384 /**************读取ds18b20当前温度************/
385
386 void ReadTemp(void)
387 {
388 1 unsigned char a=0;
389 1 unsigned char b=0;
390 1 unsigned char t=0;
391 1
392 1 Init_DS18B20();
393 1 WriteOneChar(0xCC); // 跳过读序号列号的操作
394 1 WriteOneChar(0x44); // 启动温度转换
395 1
396 1 delay_18B20(100); // this message is wery important
397 1
398 1 Init_DS18B20();
399 1 WriteOneChar(0xCC); //跳过读序号列号的操作
400 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
401 1
402 1 delay_18B20(100);
403 1
404 1 a=ReadOneChar(); //读取温度值低位
405 1 b=ReadOneChar(); //读取温度值高位
406 1 temp_value=b<<4;
407 1 temp_value+=(a&0xf0)>>4;
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