📄 readtime.lst
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C51 COMPILER V7.02b READTIME 04/19/2008 20:42:51 PAGE 1
C51 COMPILER V7.02b, COMPILATION OF MODULE READTIME
OBJECT MODULE PLACED IN C:\Documents and Settings\Administrator.MS-C0D3DC71081D\My Documents\readtime.obj
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE readtime.c BROWSE DEBUG OBJECTEXTEND OBJECT(C:\Documents and Settings\Admin
-istrator.MS-C0D3DC71081D\My Documents\readtime.obj)
stmt level source
1
2 #include <52.h>
3 #define WDT 63
4
5 #define READ 0xa3
6 #define WRITE 0xa2
7 #define uchar unsigned char
8 #define uint unsigned int
9 #define ulong unsigned long int
10 #define byte unsigned char
11 #define word unsigned int
12 #define ulong unsigned long int
13
14 sbit SDA = P1^6;//时钟芯片数据线
15 sbit SCL = P1^7;//时钟芯片时钟线
16
17 uchar data second, minute, hour, week, day, month, year;
18 word data date, time;//从控制器下载的时间暂存储变量
19 word code monthday[12] = {31, 28, 31, 30, 31, 30, //每月天数
20 31, 31, 30, 31, 30, 31};
21
22 void wr_time(void); //写时间到8563
23 void byt_to_time(void); //计算时间
24 void time_to_byt(void); //计算时间
25 void rd_time(void); //从时间芯片中读时间到second,minute,hour,week等变量中
26
27
28 void delay_iic(void)
29 {
30 1 byte i;
31 1 for(i = 0; i < 5; i++);
32 1 }
33
34 void I_start(void)//启动I2C
35 {
36 1 SDA = 1;
37 1 SCL = 1;
38 1 delay_iic();
39 1 SDA = 0;
40 1 delay_iic();
41 1 SCL = 0;
42 1 }
43
44 void I_stop(void)//I2C停止
45 {
46 1 SDA = 0;
47 1 SCL = 1;
48 1 delay_iic();
49 1 SDA = 1;
50 1 }
51
52 byte I_WaitAck(void)//等待应答
53 {
54 1 bit ack;
C51 COMPILER V7.02b READTIME 04/19/2008 20:42:51 PAGE 2
55 1
56 1 SDA = 1;
57 1 delay_iic();
58 1 SCL = 1;
59 1 delay_iic();
60 1 ack = SDA;
61 1 SCL = 0;
62 1
63 1 // WDT_CONTR=WDT;//启动看门狗
64 1
65 1 if(ack) return 0;
66 1 else return 1;
67 1 }
68
69 void I_Ack(void)//I2C应答
70 {
71 1 SDA = 1;
72 1 delay_iic();
73 1 SCL = 1;
74 1 delay_iic();
75 1 SCL = 0;
76 1 delay_iic();
77 1 SDA = 0;
78 1 // WDT_CONTR=WDT;//启动看门狗
79 1
80 1 }
81
82 void I_send(byte i_data)//I2C发送数据
83 {
84 1 byte i;
85 1
86 1 for(i = 0; i < 8; i++)
87 1 {
88 2 SDA = (bit)(i_data & 0x80);
89 2 i_data = i_data << 1;
90 2 SCL = 1;
91 2 delay_iic();
92 2 SCL = 0;
93 2 WDT_CONTR=WDT;//启动看门狗
94 2 }
95 1 SDA = 1;
96 1 }
97
98 byte I_receive(void)//I2C接收数据
99 {
100 1 byte i;
101 1 byte i_data = 0;
102 1 bit rdata;
103 1
104 1 SDA = 1;
105 1
106 1 for(i = 0; i < 8; i++)
107 1 {
108 2 SCL = 1;
109 2 i_data *= 2;
110 2 rdata = SDA;
111 2 if(rdata) i_data++;
112 2 SCL = 0;
113 2 WDT_CONTR=WDT;//启动看门狗
114 2
115 2 }
116 1 return i_data;
C51 COMPILER V7.02b READTIME 04/19/2008 20:42:51 PAGE 3
117 1 }
118
119 void I_Write(byte address, byte i_data)//写时间芯片
120 {
121 1 I_start();
122 1 I_send(WRITE);
123 1 I_WaitAck();
124 1 I_send(address);
125 1 I_WaitAck();
126 1
127 1 // WDT_CONTR=WDT;//启动看门狗
128 1
129 1 I_send(i_data);
130 1 I_WaitAck();
131 1 I_stop();
132 1 }
133
134 byte I_Read(byte address)//读时间芯片
135 {
136 1 byte i_data;
137 1
138 1 I_start();
139 1 I_send(WRITE);
140 1 I_WaitAck();
141 1 I_send(address);
142 1 I_WaitAck();
143 1
144 1 // WDT_CONTR=WDT;//启动看门狗
145 1
146 1 I_start();
147 1 I_send(READ);
148 1 I_WaitAck();
149 1 i_data = I_receive();
150 1 I_Ack();
151 1 I_stop();
152 1
153 1 return i_data;
154 1 }
155
156
157 void wr_time(void) ////更新8563时间
158 {
159 1 byte tmp;
160 1
161 1 tmp = second/10 * 16 + second%10;
162 1 I_Write(2, tmp);
163 1 tmp = minute/10 * 16 + minute%10;
164 1 I_Write(3, tmp);
165 1 tmp = hour/10 * 16 + hour%10;
166 1 I_Write(4, tmp);
167 1
168 1 WDT_CONTR=WDT;//启动看门狗
169 1
170 1 tmp = week/10 *16 + week%10;
171 1 I_Write(6, tmp);
172 1 tmp = day/10 * 16 + day%10;
173 1 I_Write(5, tmp);
174 1 tmp = month/10 * 16 + month%10;
175 1 I_Write(7, tmp);
176 1 tmp = year/10 * 16 + year%10;
177 1 I_Write(8, tmp);
178 1 }
C51 COMPILER V7.02b READTIME 04/19/2008 20:42:51 PAGE 4
179
180 /*void byt_to_time(void) //把下载的时间计算后放到dyear等变量中
181 {
182 word tmp, md;
183 byte temp, i;
184
185 year = dn_date / 1461;
186 year *= 4;
187 tmp = dn_date % 1461;
188 if(tmp >= 1096)
189 {
190 year += 3;
191 tmp -= 1096;
192 }
193 else if(tmp >= 731)
194 {
195 year += 2;
196 tmp -= 731;
197 }
198 else if(tmp >= 366)
199 {
200 year += 1;
201 tmp -= 366;
202 }
203 if((year & 3) == 0)
204 temp = 1;
205 else
206 temp = 0;
207 month = 0;
208 i = 0;
209 while(i == 0)
210 {
211 md = monthday[month];
212 month += 1;
213 if((temp != 0) && (month == 2))
214 md += 1;
215
216 WDT_CONTR=WDT;//启动看门狗
217
218 if(tmp >= md)
219 tmp -= md;
220 else
221 i = 1;
222 }
223 day = (byte)(tmp + 1);
224 week = (dn_date + 6) % 7;
225
226 hour = dn_time / 1800;
227 minute = (dn_time % 1800) / 30;
228 second = ((dn_time % 1800) % 30) * 2;
229 if((month>0x0c)|(day>0x1f)|(hour>0x18)|(minute>0x3b))timeflg=1;
230 else timeflg=0;
231
232 }*/
233 void rd_time(void) //从时间芯片中读时间到second,minute,hour,week等变量中
234 {
235 1 byte tmp;
236 1
237 1 tmp = I_Read(0x02);
238 1 tmp &= 0x7f;
239 1 second = tmp/16 * 10 + tmp%16; //BCD码转换成16进制
240 1
C51 COMPILER V7.02b READTIME 04/19/2008 20:42:51 PAGE 5
241 1 tmp = I_Read(0x03);
242 1 tmp &= 0x7f;
243 1 minute = tmp/16 * 10 + tmp%16;
244 1
245 1 tmp = I_Read(0x04);
246 1 tmp &= 0x3f;
247 1 hour = tmp/16 * 10 + tmp%16;
248 1
249 1 tmp = I_Read(0x06);
250 1 tmp &= 0x07;
251 1 week = tmp/16 * 10 + tmp%16;
252 1
253 1 // WDT_CONTR=WDT;//启动看门狗
254 1
255 1 tmp = I_Read(0x05);
256 1 tmp &= 0x3f;
257 1 day = tmp/16 * 10 + tmp%16;
258 1
259 1 tmp = I_Read(0x07);
260 1 tmp &= 0x1f;
261 1 month = tmp/16 * 10 + tmp%16;
262 1
263 1 tmp = I_Read(0x08);
264 1 tmp &= 0x7f;
265 1 year = tmp/16 * 10 + tmp%16;
266 1 //time_to_byt();
267 1 }
268
269 void time_to_byt(void)
270 {
271 1 byte tmp;
272 1 word t_da, t_ti;
273 1
274 1 tmp = year / 4;
275 1 t_da = tmp * 1461; //每4年有一闰年，共1461天
276 1 tmp = year & 0x03;
277 1 t_da += (tmp * 365); //算年
278 1 // WDT_CONTR=WDT;//启动看门狗
279 1
280 1 //if((year == 0) && (month < 3)) //2000年1、2月总天数要减1， //chinge Vx.xxA
281 1 if(((year % 4) == 0) && (month < 3)) //2000年1、2月总天数要减1，
282 1 t_da += (day - 1); //而其它的在下面算天数时由于闰年29天，在monthdat[2]数组中只算了28天，所以不用减1
283 1 else
284 1 t_da += day; //算天
285 1 for(tmp = 1; tmp < month; tmp++) //算月
286 1 t_da += monthday[tmp-1]; //由于闰年29天，在monthdat[2]数组中只算了28天，所以不用减1
287 1 date = t_da; //上传的天数=实际天数-1 （2000年01月01日 数值为0）
288 1
289 1 WDT_CONTR=WDT;//启动看门狗
290 1
291 1 t_ti = hour * 1800 + minute * 30 + second / 2;
292 1 time = t_ti;
293 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 707 ----
CONSTANT SIZE = 24 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 11 2
IDATA SIZE = ---- ----
C51 COMPILER V7.02b READTIME 04/19/2008 20:42:51 PAGE 6
BIT SIZE = ---- 2
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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