📄 sccb.lst
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C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE SCCB
OBJECT MODULE PLACED IN sccb.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE sccb.c BROWSE DEBUG OBJECTEXTEND
line level source
1 // OmniVision Serial Camera Control Bus (SCCB) Functional File.
2 //低电平持续时间 最少1，3ns ------CLK
3 //高电平持续时间最少为 O。6ns -----CLK
4 #include <Reg52.h>
5 #include <Intrins.h>
6 #include<stdio.h>
7 sbit p32=P3^2;
8 sbit SIO_C=P1^1;
9 sbit SIO_D=P1^0;
10 sbit IO= P1^2;
11 //sbit SIO_D=P1^2;
12 //chip slave ID is 0X42(for write) and 0X43(for read)
13 #define OV7620_ID 0x42
14 void serial_init(void) //改变你需要的位即可！
15 {
16 1 //串口初始化，晶振11.0592Hz，波特率9600
17 1 SCON = 0x50; // Setup serial port control register
18 1 // Mode 1: 8-bit uart var. baud rate
19 1 // REN: enable receiver
20 1 PCON &= 0x7F; // Clear SMOD bit in power ctrl reg
21 1 // This bit doubles the baud rate
22 1 TMOD &= 0xCF; // Setup timer/counter mode register
23 1 // Clear M1 and M0 for timer 1
24 1 TMOD |= 0x20; //Set M1 for 8-bit autoreload timer
25 1 TH1 = 0xFD; // Set autoreload value for timer 1
26 1 // 9600 baud with 11.0592 MHz xtal
27 1 TR1 = 1; // Start timer 1 ->TCON
28 1 TI = 1; // Set TI to indicate ready to xmit.
29 1 ES=1;
30 1 EA=1;
31 1 }
32 void delay()
33 {
34 1 unsigned char i,j,k;
35 1 for(i=0;i<10;i++)
36 1 {
37 2 for(j=0;j<20;j++)
38 2 {
39 3 for(k=0;k<248;k++);
40 3 }
41 2 }
42 1 }
43
44 void nops(void) //36us
45 {
46 1 //_nop_();
47 1 //_nop_();
48 1 //_nop_();
49 1 // _nop_();
50 1 //_nop_();
51 1 _nop_();
52 1 _nop_();
53 1 _nop_();
54 1 _nop_();
55 1 _nop_();
C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 2
56 1 }
57
58 void hnops(void)
59 {
60 1 //_nop_();
61 1 //_nop_();
62 1 //_nop_();
63 1 _nop_();
64 1 _nop_();
65 1 }
66 void OV7620_SCCB_START(void)
67 {
68 1 SIO_C=1;
69 1 nops();
70 1 SIO_D=1;
71 1 nops();
72 1 SIO_D=0;
73 1 nops();
74 1 SIO_C=0;
75 1 nops();
76 1
77 1 }
78 void OV7620_SCCB_END(void)
79 {
80 1 //SIO_C=1;
81 1 //nops();
82 1 SIO_D=0;
83 1 nops();
84 1 // SIO_D=1;
85 1 // nops();
86 1 SIO_C=1;
87 1 nops();
88 1 SIO_D=1;
89 1
90 1 }
91
92 bit OV7620_SCCB_Readbit(void )
93 {
94 1 bit temp=0;
95 1
96 1 nops();
97 1 SIO_C=1;
98 1 //input
99 1 nops();
100 1 if(SIO_D)
101 1 temp =1;
102 1 nops();
103 1 SIO_C=0;
104 1 nops();
105 1 // SBUF=temp;
106 1 // delay();
107 1
108 1 return temp;
109 1
110 1 }
111 void OV7620_SCCB_Writebit(bit a)
112 {
113 1 nops();
114 1 SIO_D=a;
115 1 nops();
116 1 nops();
117 1 SIO_C=1;
C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 3
118 1 nops();
119 1 SIO_C=0;
120 1 nops();
121 1 }
122
123
124 void OV7620_SCCB_Writechar(unsigned char b)
125 {
126 1 int i = 0;
127 1 SBUF=b;
128 1 delay();
129 1 /* data */
130 1 for (i = 0; i < 8; i++ ) {
131 2 OV7620_SCCB_Writebit(b & 0x80);
132 2 b <<= 1;
133 2 }
134 1
135 1 /* 9th bit - Don't care */
136 1 OV7620_SCCB_Writebit(1);
137 1 nops();
138 1 nops();
139 1 }
140
141 unsigned char V7620_SCCB_Readchar( void)
142 {
143 1 char i;
144 1 unsigned char tmp = 0;
145 1 unsigned char val;
146 1 bit l=0;
147 1 SIO_D=1;
148 1 nops();
149 1 nops();
150 1 for (i = 7; i >= 0; i--) //0-255 溢出 没有报错
151 1 {
152 2 l= OV7620_SCCB_Readbit();
153 2 tmp<<=1;
154 2 if(l)
155 2 {//tmp = tmp | (1<<i);
156 3 tmp=tmp | 0x01;
157 3
158 3 }
159 2 }
160 1
161 1 nops();
162 1 /* 9th bit - N.A. */
163 1 OV7620_SCCB_Writebit(1);
164 1 nops();
165 1 nops();
166 1 val = tmp & 0xff;
167 1 return val;
168 1 }
169
170 unsigned char OV7620_Read_SCCB_CMOS(unsigned char DeviceAddress,unsigned char RegisterAddress)
171 {
172 1
173 1 unsigned char val=0;
174 1 // SBUF=DeviceAddress;
175 1 // delay();
176 1 // SBUF=RegisterAddress;
177 1 // delay();
178 1
179 1 /* 2-phase write */
C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 4
180 1 OV7620_SCCB_START(); //Start
181 1 OV7620_SCCB_Writechar(DeviceAddress);
182 1 OV7620_SCCB_Writechar(RegisterAddress);
183 1 OV7620_SCCB_END(); //stop
184 1 nops();
185 1 nops();
186 1 /* 2-phase read */
187 1 OV7620_SCCB_START(); //Start
188 1 OV7620_SCCB_Writechar(DeviceAddress | 0X01);
189 1 val=V7620_SCCB_Readchar();
190 1
191 1 OV7620_SCCB_END(); //stop
192 1
193 1 return val;
194 1 }
195
196 void OV7620_Write_SCCB_COMS(unsigned char DeviceAddress,unsigned char RegisterAddress, unsigned char Writ
-e_Data)
197 {
198 1 /* 3-phase write */
199 1 OV7620_SCCB_START(); //Start
200 1 OV7620_SCCB_Writechar(DeviceAddress);
201 1 OV7620_SCCB_Writechar(RegisterAddress);
202 1 OV7620_SCCB_Writechar( Write_Data);
203 1 OV7620_SCCB_END(); //stop
204 1
205 1
206 1 }
207 //相当于一个二相写和一个二相读操作
208 unsigned char Read_CMOS(unsigned char DeviceAddress,unsigned char RegisterAddress)
209 {
210 1 unsigned char bdata Buffer_Data;
211 1
212 1 bit Buffer_Data0=Buffer_Data^0;
213 1 bit Buffer_Data1=Buffer_Data^1;
214 1 bit Buffer_Data2=Buffer_Data^2;
215 1 bit Buffer_Data3=Buffer_Data^3;
216 1 bit Buffer_Data4=Buffer_Data^4;
217 1 bit Buffer_Data5=Buffer_Data^5;
218 1 bit Buffer_Data6=Buffer_Data^6;
219 1 bit Buffer_Data7=Buffer_Data^7;
220 1
221 1 Buffer_Data= 0x42;
222 1 //printf("write data to register 0x 1c is %x\n",Buffer_Data);
223 1 F0=0;
224 1 //SIO_E=0;
225 1 //nops();
226 1
227 1 OV7620_SCCB_START(); //Start
228 1
229 1
230 1
231 1 SIO_D=Buffer_Data7;
232 1 nops();
233 1 SIO_C=1;
234 1 nops();
235 1 SIO_C=0;
236 1 nops(); //bit7
237 1
238 1 SIO_D=Buffer_Data6;
239 1 nops();
240 1 SIO_C=1;
C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 5
241 1 nops();
242 1 SIO_C=0;
243 1 nops(); //bit6
244 1
245 1 SIO_D=Buffer_Data5;
246 1 nops();
247 1 SIO_C=1;
248 1 nops();
249 1 SIO_C=0;
250 1 nops(); //bit5
251 1
252 1 SIO_D=Buffer_Data4;
253 1 nops();
254 1 SIO_C=1;
255 1 nops();
256 1 SIO_C=0;
257 1 nops(); //bit4
258 1
259 1 SIO_D=Buffer_Data3;
260 1 nops();
261 1 SIO_C=1;
262 1 nops();
263 1 SIO_C=0;
264 1 nops(); //bit3
265 1
266 1 SIO_D=Buffer_Data2;
267 1 nops();
268 1 SIO_C=1;
269 1 nops();
270 1 SIO_C=0;
271 1 nops(); //bit2
272 1
273 1 SIO_D=Buffer_Data1;
274 1 SIO_C=1;
275 1 nops();
276 1 SIO_C=0;
277 1 nops(); //bit1
278 1
279 1 SIO_D=Buffer_Data0;
280 1 nops();
281 1 SIO_C=1;
282 1 nops();
283 1 SIO_C=0;
284 1 nops(); //bit0
285 1 SIO_D=1; // don't care 1
286 1 nops();
287 1 nops();
288 1 nops();
289 1
290 1
291 1 SIO_C=1;
292 1 nops();
293 1
294 1 SIO_C=0;
295 1 nops();
296 1 // printf("send DeviceAddress success\n");
297 1
298 1 Buffer_Data=RegisterAddress;
299 1 //printf("write data to register 0x 1c is %x\n",Buffer_Data);
300 1 SIO_D=0;
301 1 nops();
302 1 SIO_C=1;
C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 6
303 1 nops();
304 1 SIO_C=0;
305 1 nops(); //bit7
306 1
307 1 SIO_D=0;
308 1 nops();
309 1 SIO_C=1;
310 1 nops();
311 1 SIO_C=0;
312 1 nops(); //bit6
313 1
314 1 SIO_D=0;
315 1 nops();
316 1 SIO_C=1;
317 1 nops();
318 1 SIO_C=0;
319 1 nops(); //bit5
320 1
321 1 SIO_D=1;
322 1 nops();
323 1 SIO_C=1;
324 1 nops();
325 1 SIO_C=0;
326 1 nops(); //bit4
327 1
328 1 SIO_D=1;
329 1 nops();
330 1 SIO_C=1;
331 1 nops();
332 1 SIO_C=0;
333 1 nops(); //bit3
334 1
335 1 SIO_D=1;
336 1 nops();
337 1 SIO_C=1;
338 1 nops();
339 1 SIO_C=0;
340 1 nops(); //bit2
341 1
342 1 SIO_D=0;
343 1 nops();
344 1 SIO_C=1;
345 1 nops();
346 1 SIO_C=0;
347 1 nops(); //bit1
348 1
349 1 SIO_D=1;
350 1 nops();
351 1 SIO_C=1;
352 1 nops();
353 1 SIO_C=0;
354 1 nops(); //bit0
355 1 SIO_D=1; // don't care 0
356 1 nops();
357 1 nops();
358 1 nops();
359 1
360 1 SIO_C=1;
361 1 nops();
362 1 SIO_C=0;
363 1 nops(); //check Ack don't care 1
364 1 // printf("send RegisterAddress success\n");
C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 7
365 1
366 1
367 1 OV7620_SCCB_END(); //stop
368 1
369 1 nops();
370 1 nops();
371 1 nops();
372 1 nops();
373 1
374 1 OV7620_SCCB_START(); //Start
375 1
376 1
377 1 Buffer_Data=0X43; // 0x43
378 1 // printf("write data to register 0x 1c is %x\n",Buffer_Data);
379 1 SIO_D=0;
380 1 nops();
381 1 SIO_C=1;
382 1 nops();
383 1 SIO_C=0;
384 1 nops(); //bit7
385 1
386 1 SIO_D=1;
387 1 nops();
388 1 SIO_C=1;
389 1 nops();
390 1 SIO_C=0;
391 1 nops(); //bit6
392 1
393 1 SIO_D=0;
394 1 nops();
395 1 SIO_C=1;
396 1 nops();
397 1 SIO_C=0;
398 1 nops(); //bit5
399 1
400 1 SIO_D=0;
401 1 nops();
402 1 SIO_C=1;
403 1 nops();
404 1 SIO_C=0;
405 1 nops(); //bit4
406 1
407 1 SIO_D=0;
408 1 nops();
409 1 SIO_C=1;
410 1 nops();
411 1 SIO_C=0;
412 1 nops(); //bit3
413 1
414 1 SIO_D=0;
415 1 nops();
416 1 SIO_C=1;
417 1 nops();
418 1 SIO_C=0;
419 1 nops(); //bit2
420 1
421 1 SIO_D=1;
422 1 nops();
423 1 SIO_C=1;
424 1 nops();
425 1 SIO_C=0;
426 1 nops(); //bit1
C51 COMPILER V8.02 SCCB 01/07/2009 13:14:33 PAGE 8
427 1
428 1 SIO_D=1;
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