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Topics - Darren

1
General discussion / Open Source USB Protocol Analyzer
http://www.openvizsla.org/

http://www.kickstarter.com/projects/bus ... l-analyzer

It had crosssed my mind recently with talk on various forums/blogs about the xbox Kinect device and capturing data from it with the beagle usb analyzer and the beagle costing $1200! there must be a cheaper option, perhaps something would be possible with even just a cypress CY7C68013A capturing raw data and feeding it through to a pc for decoding ?
2
Bus Pirate Development / I2C Sniffer
Had a fiddle with the I2C_Sniffer code to see if I could increase the capture rate, space was tight in the firmware, so I used the Optimization flag to see if it could help me out

I compiled I2C.c with '-g -Wall -mlarge-code -mlarge-data -O' and managed to squeeze it in

Optimized Output:

Code: [Select]
				if(termMode) //output for the terminal 
 350:	0d 04 e0    	cp0.b     w13
 352:	00 00 32    	bra       Z, 0x354
				{
					RingBuffer[RingWritePostion++]='0';
 354:	00 c3 b3    	mov.b     #0x30, w0
 356:	00 73 7c    	mov.b     w0, [w6+w8]
					RingBuffer[RingWritePostion++&0xfff]='x';
 358:	06 00 e8    	inc.w     w6, w0
 35a:	0a 00 60    	and.w     w0, w10, w0
 35c:	81 c7 b3    	mov.b     #0x78, w1
 35e:	01 70 7c    	mov.b     w1, [w0+w8]
					RingBuffer[RingWritePostion++&0xfff]=HXASCII[dat>>4];
 360:	06 80 e8    	inc2.w    w6, w0
 362:	0a 00 60    	and.w     w0, w10, w0
 364:	0c 81 fb    	ze        w12, w2
 366:	c4 10 de    	lsr.w     w2, #0x4, w1
 368:	e1 40 7f    	mov.b     [w1+w14], w1
 36a:	01 70 7c    	mov.b     w1, [w0+w8]
					RingBuffer[RingWritePostion++&0xfff]=HXASCII[dat&0x0f];
 36c:	63 00 43    	add.w     w6, #0x3, w0
 36e:	0a 00 60    	and.w     w0, w10, w0
 370:	6f 01 61    	and.w     w2, #0xf, w2
 372:	62 41 7f    	mov.b     [w2+w14], w2
 374:	02 70 7c    	mov.b     w2, [w0+w8]
 376:	64 00 43    	add.w     w6, #0x4, w0
					RingWritePostion&=0xfff;
 378:	8a 00 60    	and.w     w0, w10, w1
 37a:	00 00 37    	bra       0x37c <.L101>


Unoptimized Output:

Code: [Select]

 				if(termMode) //output for the terminal 
 422:	6e 48 90    	mov.b     [w14+14], w0
 424:	00 04 e0    	cp0.b     w0
 426:	00 00 32    	bra       Z, 0x428
				{
					RingBuffer[RingWritePostion++]='0';
 428:	9e 00 78    	mov.w     [w14], w1
 42a:	2e 00 90    	mov.w     [w14+4], w0
 42c:	80 80 40    	add.w     w1, w0, w1
 42e:	00 c3 b3    	mov.b     #0x30, w0
 430:	80 48 78    	mov.b     w0, [w1]
 432:	1e 0f e8    	inc.w     [w14], [w14]
					RingBuffer[RingWritePostion++&0xfff]='x';
 434:	f0 ff 20    	mov.w     #0xfff, w0
 436:	1e 00 60    	and.w     w0, [w14], w0
 438:	80 00 78    	mov.w     w0, w1
 43a:	2e 00 90    	mov.w     [w14+4], w0
 43c:	80 80 40    	add.w     w1, w0, w1
 43e:	80 c7 b3    	mov.b     #0x78, w0
 440:	80 48 78    	mov.b     w0, [w1]
 442:	1e 0f e8    	inc.w     [w14], [w14]
					RingBuffer[RingWritePostion++&0xfff]=HXASCII[dat>>4];
 444:	f0 ff 20    	mov.w     #0xfff, w0
 446:	1e 00 60    	and.w     w0, [w14], w0
 448:	80 00 78    	mov.w     w0, w1
 44a:	2e 00 90    	mov.w     [w14+4], w0
 44c:	00 81 40    	add.w     w1, w0, w2
 44e:	6e 40 90    	mov.b     [w14+6], w0
 450:	00 80 fb    	ze        w0, w0
 452:	44 00 de    	lsr.w     w0, #0x4, w0
 454:	80 80 fb    	ze        w0, w1
 456:	00 00 20    	mov.w     #0x0, w0
 458:	00 80 40    	add.w     w1, w0, w0
 45a:	10 40 78    	mov.b     [w0], w0
 45c:	00 49 78    	mov.b     w0, [w2]
 45e:	1e 0f e8    	inc.w     [w14], [w14]
					RingBuffer[RingWritePostion++&0xfff]=HXASCII[dat&0x0f];
 460:	f0 ff 20    	mov.w     #0xfff, w0
 462:	1e 00 60    	and.w     w0, [w14], w0
 464:	80 00 78    	mov.w     w0, w1
 466:	2e 00 90    	mov.w     [w14+4], w0
 468:	00 81 40    	add.w     w1, w0, w2
 46a:	6e 40 90    	mov.b     [w14+6], w0
 46c:	00 80 fb    	ze        w0, w0
 46e:	ef 00 60    	and.w     w0, #0xf, w1
 470:	00 00 20    	mov.w     #0x0, w0
 472:	00 80 40    	add.w     w1, w0, w0
 474:	10 40 78    	mov.b     [w0], w0
 476:	00 49 78    	mov.b     w0, [w2]
 478:	1e 0f e8    	inc.w     [w14], [w14]
					RingWritePostion&=0xfff;
 47a:	f0 ff 20    	mov.w     #0xfff, w0
 47c:	1e 0f 60    	and.w     w0, [w14], [w14]
 47e:	00 00 37    	bra       0x480 <.L106>


It helped out alot on this section of the code, I've uploaded a Hex file and source snippet, would be interesting to hear if it can capture 400khz traffic now, as I've not got anything here to test that with and of course if the code is useful, your welcome to use and abuse however you like

( ! ) Fatal error: Uncaught exception 'Elk_Exception' with message 'Please try again. If you come back to this error screen, report the error to an administrator.' in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
( ! ) Elk_Exception: Please try again. If you come back to this error screen, report the error to an administrator. in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
Call Stack
#TimeMemoryFunctionLocation
10.01242305680session_write_close ( )...(null):0
20.01272437272ElkArte\sources\subs\SessionHandler\DatabaseHandler->write( )...(null):0
30.01272438048Database_MySQL->query( ).../DatabaseHandler.php:119
40.05782576784Database_MySQL->error( ).../Db-mysql.class.php:273