📄 demo.lst
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C51 COMPILER V7.50 DEMO 04/04/2005 11:43:52 PAGE 1
C51 COMPILER V7.50, COMPILATION OF MODULE DEMO
OBJECT MODULE PLACED IN demo.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE demo.c BROWSE DEBUG OBJECTEXTEND
line level source
1 #include <reg52.h>
2 //#include <string.h>
3 //#include <stdio.h>
4
5 #define uchar unsigned char
6
7 #define EMBIT P1^1
8
9 uchar OLDEM=0;
10
11 //u2270b 读卡模块，利用T0解码
12
13 SCON |= 0xc0; //开启帧错误位。UART设置为9位。
*** ERROR C129 IN LINE 13 OF DEMO.C: missing ';' before '|='
14 TCON |= 0x00;
15 PCON &= 0x7f;
16 TMOD |= 0x11; //定义T0工作模式定时器0作为双8位定时计数 器。
17 //TL0为8位定时/计数器通过标准定时器0控制位控制。
18 //TH0仅作为8位定时器，由定时器1控制位控制，此模式下定时/计数器1关闭。
19
20 bit bitchange(void)//检查数据
21 {
22 uchar outtime;
23 bit bitc;
24 bitc=1;
25 outtime=200;
26 bitchlp1:
27 if (((EMBIT==OLDEM) && (outtime!=0))==1)
28 {
29 outtime--;
30 rst_wdog();
31 goto bitchlp1;
32 }
33 if (outtime==0)
34 {
35 bitc=0;
36 }
37 OLDEM=EMBIT;
38 return bitc;
39 }
40
41 bit findlongpluse(void)
42 {
43 bit retbit;
44 retbit=1;
45 OLDEM=EMBIT;
46 TH0=0;
47 TL0=0;
48 TR0=0;
49 if (bitchange()==0)
50 {
51 goto errfindlong;
52 }
53 TR0=1;
54 findllp1:
C51 COMPILER V7.50 DEMO 04/04/2005 11:43:52 PAGE 2
55 if (bitchange()==0)
56 {
57 goto errfindlong;
58 }
59 TR0=0;
60 if (TH0>2)
61 {
62 goto errfindlong;
63 }
64 if (TH0==2)
65 {
66 goto findllp2;
67 }
68 if ((TH0==1) && (TL0>98))
69 {
70 goto findllp2;
71 }
72 if ((TH0==0) && (TL0<100))
73 {
74 goto errfindlong;
75 }
76 TH0=0;
77 TL0=0;
78 TR0=1;
79 goto findllp1;
80 errfindlong:retbit=0;
81 findllp2: return retbit;
82 }
83
84 bit readbit(void)
85 {
86 bit retbit;
87 retbit=1;
88 TH0=0;
89 TL0=0;
90 TR0=1;
91 if (bitchange()==0)
92 {
93 goto errreadbit;
94 }
95 TR0=0;
96 if (TH0>2)
97 {
98 goto errreadbit;
99 }
100 if ((TH0==0) && (TL0<100))
101 {
102 goto errreadbit;
103 }
104 if (TH0==2)
105 {
106 goto okreadbit;
107 }
108 if ((TH0==1) && (TL0>35))
109 {
110 goto okreadbit;
111 }
112 TH0=0;
113 TL0=0;
114 TR0=1;
115 if (bitchange()==0)
116 {
C51 COMPILER V7.50 DEMO 04/04/2005 11:43:52 PAGE 3
117 goto errreadbit;
118 }
119 TR0=0;
120 if (TH0>1)
121 {
122 goto errreadbit;
123 }
124 if ((TH0==0) && (TL0<100))
125 {
126 goto errreadbit;
127 }
128 if ((TH0==1) && (TL0>35))
129 {
130 goto errreadbit;
131 }
132 goto okreadbit;
133 errreadbit:retbit=0;
134 okreadbit:return retbit;
135 }
136
137 bit findbegin(void)
138 {
139 bit retbit;
140 uchar tempdata;
141 uint fk;
142 fk=1000;
143 retbit=1;
144 tempdata=0;
145 if (findlongpluse()==0)
146 {
147 goto errfindbegin;
148 }
149 findbelp1:
150 if (readbit()==0)
151 {
152 goto errfindbegin;
153 }
154 if (OLDEM==0)
155 {
156 if (tempdata==0xff)
157 {
158 goto okfindbegin;
159 }
160 tempdata=tempdata<<1;
161 tempdata=tempdata | 1;
162 }
163 else
164 {
165 tempdata=tempdata<<1;
166 }
167 fk--;
168 if (fk==0)
169 {
170 goto errfindbegin;
171 }
172 goto findbelp1;
173 errfindbegin: retbit=0;
174 okfindbegin:return retbit;
175 }
176
177 bit rdemdata(void)
178 {
C51 COMPILER V7.50 DEMO 04/04/2005 11:43:52 PAGE 4
179 bit retbit;
180 uchar i;
181 uchar j;
182 uchar parity;
183 uchar emcheck;
184 emcheck=0;
185 retbit=1;
186 if (findbegin()==0)
187 {
188 goto errrdem;
189 }
190 for (j=0;j<=4;j++)
191 {
192 parity=0;
193 for (i=1;i<=4;i++)
194 {
195 if (readbit()==0)
196 {
197 goto errrdem;
198 }
199 emdata[j]=emdata[j]<<1;
200 if (OLDEM==0)
201 {
202 emdata[j]=emdata[j] | 1;
203 parity++;
204 }
205 }
206 if (readbit()==0)
207 {
208 goto errrdem;
209 }
210 if (OLDEM==0)
211 {
212 parity++;
213 }
214 if ((parity & 1)==1)
215 {
216 goto errrdem;
217 }
218 parity=0;
219
220 for (i=1;i<=4;i++)
221 {
222 if (readbit()==0)
223 {
224 goto errrdem;
225 }
226 emdata[j]=emdata[j]<<1;
227 if (OLDEM==0)
228 {
229 emdata[j]=emdata[j] | 1;
230 parity++;
231 }
232 }
233 if (readbit()==0)
234 {
235 goto errrdem;
236 }
237 if (OLDEM==0)
238 {
239 parity++;
240 }
C51 COMPILER V7.50 DEMO 04/04/2005 11:43:52 PAGE 5
241 if ((parity&1)==1)
242 {
243 goto errrdem;
244 }
245 }
246 for (i=1;i<=5;i++)
247 {
248 if (readbit()==0)
249 {
250 goto errrdem;
251 }
252 emcheck=emcheck<<1;
253 if (OLDEM==0)
254 {
255 emcheck=emcheck | 1;
256 }
257 }
258 if ((emcheck&1)==1)
259 {
260 goto errrdem;
261 }
262 emcheck=emcheck<<3;
263 for (j=0;j<=3;j++)
264 {
265 parity=0;
266 for (i=0;i<=4;i++)
267 {
268 if (((emdata[i]<<j) & 0x80)==0x80)
269 {
270 parity++;
271 }
272 if (((emdata[i]<<j) & 0x8)==0x8)
273 {
274 parity++;
275 }
276 }
277 if (((emcheck<<j) & 0x80)==0x80)
278 {
279 parity++;
280 }
281 if ((parity%2)==1)
282 {
283 goto errrdem;
284 }
285 }
286 goto okrdemdata;
287 errrdem:retbit=0;
288 okrdemdata:return retbit;
289 }
290
291
292
C51 COMPILATION COMPLETE. 0 WARNING(S), 1 ERROR(S)
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