📄 ds1302.lst
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203 1 DS1302InputByte(ucAddr|0x01); // 地址，命令
204 1 ucData = DS1302OutputByte(); // 读1Byte数据
205 1 DS1302_CLK = 1;
206 1 DS1302_RST = 0;
207 1 return(ucData);
208 1 }
209
210
211
212 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
213 {
214 1 unsigned char ReadValue;
215 1 ReadValue = Read1302(DS1302_SECOND);
216 1 Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
217 1 ReadValue = Read1302(DS1302_MINUTE);
218 1 Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
219 1 ReadValue = Read1302(DS1302_HOUR);
220 1 Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
221 1 ReadValue = Read1302(DS1302_DAY);
222 1 Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
223 1 ReadValue = Read1302(DS1302_WEEK);
224 1 Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
225 1 ReadValue = Read1302(DS1302_MONTH);
226 1 Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
227 1 ReadValue = Read1302(DS1302_YEAR);
228 1 Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
229 1 }
230
231 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[]
232 { 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
233 1 {
234 2 Time->DateString[0] = '2';
235 2 Time->DateString[1] = '0';
236 2 Time->DateString[2] = Time->Year/10 + '0';
237 2 Time->DateString[3] = Time->Year%10 + '0';
238 2 }
239 1 else
240 1 {
C51 COMPILER V8.02 DS1302 05/12/2008 20:13:04 PAGE 5
241 2 Time->DateString[0] = ' ';
242 2 Time->DateString[1] = ' ';
243 2 Time->DateString[2] = ' ';
244 2 Time->DateString[3] = ' ';
245 2 }
246 1 Time->DateString[4] = '/';
247 1 if(hide_month<2)
248 1 {
249 2 Time->DateString[5] = Time->Month/10 + '0';
250 2 Time->DateString[6] = Time->Month%10 + '0';
251 2 }
252 1 else
253 1 {
254 2 Time->DateString[5] = ' ';
255 2 Time->DateString[6] = ' ';
256 2 }
257 1 Time->DateString[7] = '/';
258 1 if(hide_day<2)
259 1 {
260 2 Time->DateString[8] = Time->Day/10 + '0';
261 2 Time->DateString[9] = Time->Day%10 + '0';
262 2 }
263 1 else
264 1 {
265 2 Time->DateString[8] = ' ';
266 2 Time->DateString[9] = ' ';
267 2 }
268 1 if(hide_week<2)
269 1 {
270 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
271 2 }
272 1 else
273 1 {
274 2 week_value[0] = ' ';
275 2 }
276 1 week_value[1] = '\0';
277 1
278 1 Time->DateString[10] = '\0'; //字符串末尾加 '\0' ,判断结束字符
279 1 }
280
281 void TimeToStr(SYSTEMTIME *Time) //将时,分,秒数据转换成液晶显示字符放到数组 TimeString[];
282 { if(hide_hour<2)
283 1 {
284 2 Time->TimeString[0] = Time->Hour/10 + '0';
285 2 Time->TimeString[1] = Time->Hour%10 + '0';
286 2 }
287 1 else
288 1 {
289 2 Time->TimeString[0] = ' ';
290 2 Time->TimeString[1] = ' ';
291 2 }
292 1 Time->TimeString[2] = ':';
293 1 if(hide_min<2)
294 1 {
295 2 Time->TimeString[3] = Time->Minute/10 + '0';
296 2 Time->TimeString[4] = Time->Minute%10 + '0';
297 2 }
298 1 else
299 1 {
300 2 Time->TimeString[3] = ' ';
301 2 Time->TimeString[4] = ' ';
C51 COMPILER V8.02 DS1302 05/12/2008 20:13:04 PAGE 6
302 2 }
303 1 Time->TimeString[5] = ':';
304 1 if(hide_sec<2)
305 1 {
306 2 Time->TimeString[6] = Time->Second/10 + '0';
307 2 Time->TimeString[7] = Time->Second%10 + '0';
308 2 }
309 1 else
310 1 {
311 2 Time->TimeString[6] = ' ';
312 2 Time->TimeString[7] = ' ';
313 2 }
314 1 Time->DateString[8] = '\0';
315 1 }
316
317
318 void Initial_DS1302(void) //时钟芯片初始化
319 {
320 1 unsigned char Second=Read1302(DS1302_SECOND);
321 1 if(Second&0x80) //判断时钟芯片是否关闭
322 1 {
323 2 Write1302(0x8e,0x00); //写入允许
324 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
325 2 Write1302(0x88,0x07);
326 2 Write1302(0x86,0x25);
327 2 Write1302(0x8a,0x07);
328 2 Write1302(0x84,0x23);
329 2 Write1302(0x82,0x59);
330 2 Write1302(0x80,0x55);
331 2 Write1302(0x8e,0x80); //禁止写入
332 2 }
333 1
334 1 }
335
336 /***********ds18b20子程序*************************/
337
338 /***********ds18b20延迟子函数（晶振12MHz ）*******/
339
340 void delay_18B20(unsigned int i)
341 {
342 1 while(i--);
343 1 }
344
345 /**********ds18b20初始化函数**********************/
346
347 void Init_DS18B20(void)
348 {
349 1 unsigned char x=0;
350 1 DQ = 1; //DQ复位
351 1 delay_18B20(8); //稍做延时
352 1 DQ = 0; //单片机将DQ拉低
353 1 delay_18B20(80); //精确延时 大于 480us
354 1 DQ = 1; //拉高总线
355 1 delay_18B20(14);
356 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
357 1 delay_18B20(20);
358 1 }
359
360 /***********ds18b20读一个字节**************/
361
362 unsigned char ReadOneChar(void)
363 {
C51 COMPILER V8.02 DS1302 05/12/2008 20:13:04 PAGE 7
364 1 uchar i=0;
365 1 uchar dat = 0;
366 1 for (i=8;i>0;i--)
367 1 {
368 2 DQ = 0; // 给脉冲信号
369 2 dat>>=1;
370 2 DQ = 1; // 给脉冲信号
371 2 if(DQ)
372 2 dat|=0x80;
373 2 delay_18B20(4);
374 2 }
375 1 return(dat);
376 1 }
377
378 /*************ds18b20写一个字节****************/
379
380 void WriteOneChar(uchar dat)
381 {
382 1 unsigned char i=0;
383 1 for (i=8; i>0; i--)
384 1 {
385 2 DQ = 0;
386 2 DQ = dat&0x01;
387 2 delay_18B20(5);
388 2 DQ = 1;
389 2 dat>>=1;
390 2 }
391 1 }
392
393 /**************读取ds18b20当前温度************/
394
395 void ReadTemp(void)
396 {
397 1 unsigned char a=0;
398 1 unsigned char b=0;
399 1 unsigned char t=0;
400 1
401 1 Init_DS18B20();
402 1 WriteOneChar(0xCC); // 跳过读序号列号的操作
403 1 WriteOneChar(0x44); // 启动温度转换
404 1
405 1 delay_18B20(100); // this message is wery important
406 1
407 1 Init_DS18B20();
408 1 WriteOneChar(0xCC); //跳过读序号列号的操作
409 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
410 1
411 1 delay_18B20(100);
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