1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
|
Okay, let's tell something about the protocoll:
Everything can be looked up in the USB 1.1 secification!
http://www.usb.org/developers/data/usbspec.zip
That's where I have everything from.
All the communication consists of three usb command types:
It seems that all the packages have a little endian byte order (least significant byte first?)
I always confuse that. Well, If I have 0x0001 then it sends 01 00, so turned around.
1. control packages with direction "in"
2. control packages with direction "out"
3. bulk transfers with direction "in"
1. These control packages are always 8 Bytes long. The first
Byte is the reqest Type. this is always 0xc1 for direction "in".
The c1 is a Bitmap:
7 1 means that the direction is device to host
6 1 Bits 6 and 5 mean that the "Type" is "Vendor"
5 0
4 0 the first 5 Bits (0-4) define the recipient. In this case an "Interface"
3 0
2 0
1 0
0 1
the last two Bytes are always 01 00 the length of the camera reply, so 0x0001 - one Byte.
The camera always replys with 0x00.
2. Similar to 1. just the direction is "out".
The first byte is always 0x41 (just changing the last bit to 0 - direction "out")
The last two bytes are 00 00, because we don't await an answer of the camera.
3. these semm to be standard bulk transfers. you just open one, and the camera sends data.
The direction of this transfer is "in".
The trnsfer buffer length is always 0x100.
-----------------
So, what happens now on the bus:
First we send a standard USB Device request, to get the device descriptor:
direction is "in" (80) length of answer is 0x0012 (12 00)
SetupPacket : 80 06 00 01 00 00 12 00
We get as an answer the device descriptor:
0000:
12 01 00 01 00 00 00 08 bd 06 04 04 90 00 00 00
0010:
00 01
What this means is in the USB specs.
Then we want the "configuration descriptor" from the device. I think this is done by sending:
SetupPacket : 80 06 00 02 00 00 09 02
As answer we should get:
0000:
09 02 27 00 01 01 00 80 fa 09 04 01 00 03 ff 00
0010:
00 00 07 05 82 02 40 00 00 07 05 03 02 40 00 00
0020:
07 05 84 03 01 00 08
Now it's time to choose a configuration. I believe the camera just has one, but without setting it exlicitly, the camera does nothing!
So we choose configuration 0x01.
I think this is done by sending:
SetupPacket : 00 09 01 00 00 00 00 00
Note, that the direction is "out" now (00) and the length 0x0000 (00 00).
That was the setup process. Now the camera should talk to us.
***************
* Here I had one picture on the camera. I plugged the camera in,
* got the thumbnail and deleted it. Then I switched the camera
* off.
*
* In further experiemnts we have to try out, where our magic numbers
* are: Like: How many pictures are on the camera, which one is going
* to be downloaded...
*****************************
SetupPacket : c1 00 00 00 21 05 01 00
answer: 00
SetupPacket : 41 02 00 00 07 00 00 00
SetupPacket : 41 0a 00 00 00 00 00 00
SetupPacket : 41 02 00 00 07 00 00 00
SetupPacket : 41 0a 00 00 01 00 00 00
Bulk Transfer "in":
0000: 1 . 1 6 I think this is something
01 00 00 10 00 00 00 00 00 31 2e 31 36 00 00 00 like a directory... No idea, what
0010: the 1.16 means. Could be either a
00 00 00 00 00 00 02 00 00 02 00 00 00 00 06 0a protocol or firmware version.
0020:
1e 79 01 69 02 28 06 50 01 e0 00 60 00 c0 0f 00
0030:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0050:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0060:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0070:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0080:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0090:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00a0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00b0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00c0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00d0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00e0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00f0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
SetupPacket : c1 00 00 00 21 05 01 00
answer: 00
SetupPacket : c1 00 00 00 00 80 01 00
answer: 00
SetupPacket : 41 0a 01 00 08 00 00 00
Bulk Transfer "in":
0000: 1 . 1 6
01 00 00 10 00 14 00 00 00 31 2e 31 36 00 00 00 The 14 is new. No idea, what it means...
0010:
00 01 00 00 00 00 02 00 00 02 00 00 00 00 06 0a The 01 could be one of the magic
0020: numbers, since there was ONE pic
1e 79 01 69 02 28 06 50 01 e0 00 60 00 c0 0f 00 on the camera...
0030:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0050:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0060:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0070:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0080:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0090:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00a0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00b0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00c0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00d0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00e0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00f0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
**************************
* I just got an idea: The camera has internal AND a flash card as memory.
* When we have a flash card, the internal memory is not going to
* be used. Maybe the first "directory" is the internal one, with zero pics.
* Maybe the second one is the flash card directory with the one pic.
* Maybe I'm completely wrong... ;-)
***************************
SetupPacket : c1 00 00 00 85 89 01 00
answer: 00
SetupPacket : c1 00 00 00 21 05 01 00
answer: 00
SetupPacket : c1 00 00 00 00 80 01 00
answer: 00
SetupPacket : c1 00 00 00 21 05 01 00
answer: 00
SetupPacket : c1 00 00 00 00 80 01 00
answer: 00
SetupPacket : 41 0a 01 00 0a 00 00 00
Bulk Transfer "in":
0000: E x i f M M *
ff d8 ff e1 01 a5 45 78 69 66 00 00 4d 4d 00 2a
0010:
00 00 00 08 00 07 01 1a 00 05 00 00 00 01 00 00
0020: (
01 0e 01 1b 00 05 00 00 00 01 00 00 01 16 01 28
0030:
00 03 00 00 00 01 00 02 00 00 02 13 00 03 00 00
0040:
P I C T 0 0 0 1 J P G <sp>
50 49 43 54 30 30 30 31 4a 50 47 20 00 00 00 00
0050:
00 00 00 00 00 00 00 00 00 00 02 00 00 14 00 00
0060: D 0 ^ @ c
00 04 00 00 00 01 00 00 00 44 00 00 30 5e 40 63
0070:
@ , A f
40 00 01 2c 41 66 00 00 00 00 00 00 00 00 00 00
0080:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0090:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00a0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00b0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00c0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00d0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00e0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00f0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Bulk transfer "in":
0000:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0010:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0020:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0030:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0050:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0060: 0 2 1 0
0b 90 00 00 07 00 00 00 04 30 32 31 30 91 01 00
0070:
07 00 00 00 04 01 02 03 00 a0 00 00 07 00 00 00
0080:
04 00 00 00 00 a0 01 00 03 00 00 00 01 00 01 00
0090:
00 a0 02 00 04 00 00 00 01 00 00 02 00 a0 03 00
00a0:
04 00 00 00 01 00 00 01 80 ff db 00 84 00 10 0b
00b0: (
0c 0e 0c 0a 10 0e 0d 0e 12 11 10 13 18 28 1a 18
00c0: 1 # % ( : 3 = < 9 3 8 7
16 16 18 31 23 25 1d 28 3a 33 3d 3c 39 33 38 37
00d0:
@ H \ N @ D W E 7 8 P m Q W _ b
40 48 5c 4e 40 44 57 45 37 38 50 6d 51 57 5f 62
00e0:
67 68 67 3e 4d 71 79 70 64 78 5c 65 67 63 01 11
00f0:
12 12 18 15 18 2f 1a 1a 2f 63 42 38 42 63 63 63
Then 18 further bulk "in" transfers, probably containing the data of the picture/thumbnail.
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
plenty of these more for wuite a while.
SetupPacket : c1 00 00 00 21 05 01 00
SetupPacket : c1 00 00 00 00 80 01 00
SetupPacket : c1 00 00 00 21 05 01 00
SetupPacket : c1 00 00 00 00 80 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
and so on...
SetupPacket : c1 00 00 00 21 05 01 00
SetupPacket : c1 00 00 00 00 80 01 00
SetupPacket : 41 0a 01 00 0d 00 00 00
SetupPacket : c1 00 00 00 20 05 01 00 Somewhere here I deleted
SetupPacket : 41 02 00 00 07 00 00 00 a thumbnail...
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : 41 0a 01 00 00 00 00 00
SetupPacket : c1 00 00 00 21 05 01 00
SetupPacket : 41 02 00 00 07 00 00 00
SetupPacket : 41 0a 00 00 00 00 00 00
SetupPacket : 41 02 00 00 07 00 00 00
SetupPacket : 41 0a 00 00 01 00 00 00
Bult transfer "in":
0000: 1 . 1 6 Maybe this is something like
01 00 00 10 00 00 00 00 00 31 2e 31 36 00 00 00 the directory... So, after deleting
0010: a thumbnail, it re-reads the directory
00 00 00 00 00 00 01 00 00 02 00 00 00 00 06 0a
0020:
1e 79 01 69 02 28 06 50 01 e0 00 60 00 c0 0f 00
0030:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0050:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0060:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0070:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0080:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0090:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00a0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00b0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00c0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00d0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00e0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00f0:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
SetupPacket : c1 00 00 00 85 89 01 00
etc. pp.
SetupPacket : 41 0a 01 00 00 00 00 00 Somewhere here I just switched off
SetupPacket : c1 00 00 00 21 05 01 00 the camera... It just dies then
SetupPacket : c1 00 00 00 21 05 01 00 We don't have to do something
special...
|
