Arduino上用JPEG Color Camera拍照【转】

shenhaiyu

原帖地址：http://www.oschina.net/question/1425530_143521


今天晚上用Arduino+JPEG摄像头拍照，并且存到了SD开里面。因为网上的很多例子都说照出来的照片很花，结果果然如此，花了很长的时候将这个问题解决，得到了清晰的图像，现在分享给大家。



硬件清单

• Arduino UNO
• LinkSprite JPGE Color Camera
• SD Card Breakout Board
• 导线若干
  

接线方法
SD Card Breakout Board

• MOSI – pin 11
• MISO – pin 12
• CLK – pin 13
• CS – pin 4
• VCC-5v
  

JPGE Camera

• RX-pin6
• TX-pin5
• VCC-5v
  

示例代码  

1. // LinkSprite.com
   
2. // Note:
   
3. // 1. SD must be formated to FAT16
   
4. // 2. As the buffer of softserial has 64 bytes, so the code read 32 bytes each time
   
5. // 3. Please add the libaray to the lib path
   
6. 
   
7. //  * SD card attached to SPI bus as follows:
   
8. //** MOSI - pin 11
   
9. // ** MISO - pin 12
   
10. // ** CLK - pin 13
    
11. // ** CS - pin 4
    
12. 
    
13. #include <SoftwareSerial.h>
    
14. #include <SD.h>
    
15. 
    
16. byte ZERO = 0x00;
    
17. 
    
18. byte incomingbyte;
    
19. SoftwareSerial mySerial(5,6);          // Set Arduino pin 4 and 5 as softserial
    
20. 
    
21. long int a=0x0000,j=0,k=0,count=0,i=0;
    
22. uint8_t MH,ML;
    
23. boolean EndFlag=0;
    
24. 
    
25. File  myFile;
    
26. 
    
27. void SendResetCmd();
    
28. void SetBaudRateCmd();
    
29. void SetImageSizeCmd();
    
30. void SendTakePhotoCmd();
    
31. void SendReadDataCmd();
    
32. void StopTakePhotoCmd();
    
33. 
    
34. void setup()
    
35. {
    
36. 
    
37. Serial.begin(38400);
    
38. while (!Serial) {
    
39. ; // wait for serial port to connect. Needed for Leonardo only
    
40. }
    
41. 
    
42. mySerial.begin(38400);
    
43. 
    
44. Serial.print("Initializing SD card...");
    
45. // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
    
46. // Note that even if it's not used as the CS pin, the hardware SS pin
    
47. // (10 on most Arduino boards, 53 on the Mega) must be left as an output
    
48. // or the SD library functions will not work.
    
49. pinMode(10, OUTPUT);
    
50. 
    
51. if (!SD.begin(4)) {
    
52. Serial.println("initialization failed!");
    
53. return;
    
54. }
    
55. Serial.println("initialization done.");
    
56. 
    
57. }
    
58. 
    
59. void loop()
    
60. {
    
61. 
    
62. byte a[32];
    
63. int ii;
    
64. 
    
65. SendResetCmd();
    
66. delay(4000);                            //Wait 2-3 second to send take picture command
    
67. 
    
68. SendTakePhotoCmd();
    
69. 
    
70. while(mySerial.available()>0)
    
71. {
    
72. incomingbyte=mySerial.read();
    
73. }
    
74. 
    
75. myFile = SD.open("pic.jpg", FILE_WRITE); //<strong><span style="color: #ff0000;">The file name should not be too long</span></strong>
    
76. 
    
77. while(!EndFlag)
    
78. {
    
79. j=0;
    
80. k=0;
    
81. count=0;
    
82. SendReadDataCmd();
    
83. 
    
84. delay(20); //250 for regular
    
85. 
    
86. while(mySerial.available()>0)
    
87. {
    
88. incomingbyte=mySerial.read();
    
89. k++;
    
90. if((k>5)&&(j<32)&&(!EndFlag))
    
91. {
    
92. a[j]=incomingbyte;
    
93. if((a[j-1]==0xFF)&&(a[j]==0xD9))     //tell if the picture is finished
    
94. EndFlag=1;
    
95. j++;
    
96. count++;
    
97. }
    
98. }
    
99. 
    
100. for(j=0;j<count;j++)
     
101. {
     
102. if(a[j]<0x10)
     
103. Serial.print("0");
     
104. Serial.print(a[j],HEX);           // observe the image through serial port
     
105. Serial.print(" ");
     
106. }
     
107. 
     
108. for(ii=0; ii<count; ii++)
     
109. myFile.write(a[ii]);
     
110. 
     
111. Serial.println();
     
112. 
     
113. i++;
     
114. 
     
115. }
     
116. 
     
117. myFile.close();
     
118. 
     
119. Serial.print("Finished writing data to file");
     
120. 
     
121. while(1);
     
122. 
     
123. }
     
124. 
     
125. void SendResetCmd()
     
126. {
     
127. mySerial.write(0x56);
     
128. mySerial.write(ZERO);
     
129. mySerial.write(0x26);
     
130. mySerial.write(ZERO);
     
131. }
     
132. 
     
133. void SetImageSizeCmd()
     
134. {
     
135. mySerial.write(0x56);
     
136. mySerial.write(ZERO);
     
137. mySerial.write(0x31);
     
138. mySerial.write(0x05);
     
139. mySerial.write(0x04);
     
140. mySerial.write(0x01);
     
141. mySerial.write(ZERO);
     
142. mySerial.write(0x19);
     
143. mySerial.write(0x11);
     
144. }
     
145. 
     
146. void SetBaudRateCmd()
     
147. {
     
148. mySerial.write(0x56);
     
149. mySerial.write(ZERO);
     
150. mySerial.write(0x24);
     
151. mySerial.write(0x03);
     
152. mySerial.write(0x01);
     
153. mySerial.write(0x2A);
     
154. mySerial.write(0xC8);
     
155. 
     
156. }
     
157. 
     
158. void SendTakePhotoCmd()
     
159. {
     
160. mySerial.write(0x56);
     
161. mySerial.write(ZERO);
     
162. mySerial.write(0x36);
     
163. mySerial.write(0x01);
     
164. mySerial.write(ZERO);
     
165. }
     
166. 
     
167. void SendReadDataCmd()
     
168. {
     
169. MH=a/0x100;
     
170. ML=a%0x100;
     
171. mySerial.write(0x56);
     
172. mySerial.write(ZERO);
     
173. mySerial.write(0x32);
     
174. mySerial.write(0x0c);
     
175. mySerial.write(ZERO);
     
176. mySerial.write(0x0a);
     
177. mySerial.write(ZERO);
     
178. mySerial.write(ZERO);
     
179. mySerial.write(MH);
     
180. mySerial.write(ML);
     
181. mySerial.write(ZERO);
     
182. mySerial.write(ZERO);
     
183. mySerial.write(ZERO);
     
184. mySerial.write(0x20);
     
185. mySerial.write(ZERO);
     
186. mySerial.write(0x0a);
     
187. a+=0x20;
     
188. }
     
189. 
     
190. void StopTakePhotoCmd()
     
191. {
     
192. mySerial.write(0x56);
     
193. mySerial.write(ZERO);
     
194. mySerial.write(0x36);
     
195. mySerial.write(0x01);
     
196. mySerial.write(0x03);
     
197. }

复制代码

测试运行

• 将所有的线接好。
• 在Arduino IDE 1.0.5里面运行代码
• 编译下载
• 打开串口触发拍照
• 当监视串口打出“Finished writing data to file”则照片数据已经写到SD里面
  

看看我拍的照片。

wing

不错不错,效果还可以

shenhaiyu

wing 发表于 2014-4-15 12:50
不错不错,效果还可以

嗯，转来的帖子，在这分享一下，我没实际做过

hp198969

保存后是什么格式呢？

shenhaiyu

hp198969 发表于 2014-4-15 20:09
保存后是什么格式呢？

没注意看程序吧，第75行：jpg

daiqx2

如果要玩这个强烈建议用硬串口读取，速度会快很多

shenhaiyu

daiqx2 发表于 2014-5-2 09:07
如果要玩这个强烈建议用硬串口读取，速度会快很多

嗯，有待实验一下，给出个速度测试报告

smallfivecn

好帖要顶呀