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Messages - s3c
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Bus Pirate Support / Re: RF Sniffing
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Bus Pirate Support / Re: RF Sniffing
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Bus Pirate Support / Re: RF Sniffing
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Which baudrate did you use ?
You don't need to worry about this at all, I only used the command interface to turn on the bus pirate power supplies, if I remember correctly you have to enter some functional mode before it's allowed however. Can you verify that these are in fact turned on while sniffing? The power led should be lit when it's on.
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Did you use 5v or 3v ?
These receivers get picky when you drop the voltage too much, ideally you want to use 5v.
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Which output type did you use ? Normal or Hi-z ?
Since no outputs are used this doesn't matter.
When capturing data hold down the button for one of those transmitters before you press capture, that should give you a nice trace like the ones I got.
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Bus Pirate Support / Re: RF Sniffing
The thing with these receivers is that they give complete rubbish when they don't pick up a signal. Setting the trigger mode thus won't be usefull. Also, you can probably get away with a much lower sampling rate, only guessing but prob something like 10khz. With a lower sample rate you can then record for longer which is usful since you can't use the trigger. Hope that helps.
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AVRDude / Re: BP V4 as STK500 with AVRStudio6
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AVRDude / BP V4 as STK500 with AVRStudio6
viewtopic.php?f=41&t=4207
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Bus Pirate Support / Re: Binary Raw wire not responding with read data.
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Bus Pirate Support / Binary Raw wire not responding with read data.
Here's a screen shot of the read waveform:
Which reads back "ABCDE" from a device, the read function however returns 0 most of the time and a random value some others, I was thinking maybe the bp is using the wrong pin to read back the data? Here's the code:
Code: [Select]
memset(data, 0, 24);
for(loop = 0; loop < 24; loop++){
data[loop] = sendcommand(hComm, CMD_READ_BYTE);
printf("%d ", data[loop]);
sleep(2);
}
Code: [Select]
unsigned char sendcommand(HANDLE hComm, unsigned char command){
int bytes_written, bytes_received;
unsigned char received_byte;
PurgeComm(hComm, PURGE_RXCLEAR);
WriteFile(hComm, &command, 1, &bytes_written, 0);
//sleep(2);
ReadFile(hComm, &received_byte, 1, &bytes_received, 0);
return received_byte;
}The values printed are "0 0 0 0 ..."
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Open Bench Logic Sniffer / ISE Webpack simulation woes.
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Open Bench Logic Sniffer / Re: Triggering tips and strange bus behaviour.
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Open Bench Logic Sniffer / Re: Triggering tips and strange bus behaviour.
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Open Bench Logic Sniffer / Triggering tips and strange bus behaviour.
http://dangerousprototypes.com/forum/index.php?topic=306.0
This is actually the immobilizer dongle for my car. I finally got around to playing around with it some more and hooked up the OLS. Some of the dumps made sense and others not so much, the bus pirate in I2C monitor mode made a lot more sense though, here's 3 consecutive dumps.
Code: [Select]
][0xA0+0x06+[0xA1+0x30+][][0xA0+0x05+[0xA1+0x03+][][0xA0+0x04+[0xA1+0xCE+]]]]]]
][0xA0+0x06+[0xA1+0x30+][][0xA0+0x05+[0xA1+0x03+][][0xA0+0x04+[0xA1+0xCE+]]]]
][0xA0+0x06+[0xA1+0x30+][][0xA0+0x05+[0xA1+0x03+][][0xA0+0x04+[0xA1+0xCE+]]]]]]
Easy enough to understand, it reads 3 bytes, byte 6, byte 5 and byte 4, in my case being 0x30, 0x3, 0xCE (Yes, you know have enough info to steal my car). I would simply have done one read of 3 bytes starting at location 4 and not 3 random reads but that's not the part that tickles me. Are the logic dumps wrong or is this design deliberately misleading.
I had some trouble getting these dumps as well, more than half the time getting only a blank output, I'd get a good dump, change the memory setting and then get nothing again, a fault on my part perhaps? If you're interested please take a look at the dumps and tell me what you think.
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Bus Pirate Support / Re: Announcement: Bus Ninja - AVR/Arduino Bus Pirate clone
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Bus Pirate Support / Re: help please can't activate bitbang mode
http://code.google.com/p/the-bus-pirate ... nk/scripts