Skip to main content

Show Posts

This section allows you to view all Show Posts made by this member. Note that you can only see Show Posts made in areas you currently have access to.

Messages - carpas

Bus Pirate Development / Re: Bus Pirate "Ultra" v1a & v1b with ICE40 and Icestorm :)
I'm curious why we couldn't support the JTAG auto detect?
I have a router with 20 pin header which should be a jtag, has not standard pinout, I tried many "jtag finder" none has had success.
All devices which I've seen, have more than 8 pins: 30, 24. So with only 8 pins I don't know how bus pirate detect all pins.

I'm sure we can do that.
Good...  :D
Bus Pirate Development / Re: Bus Pirate "Ultra" v1a & v1b with ICE40 and Icestorm :)
Have you seen this project:

It originally even had "Bus Pirate + Bus Blaster + Logic Sniffer" as description, but that is now removed.
Very interesting project. It has many pins, I think the new bus pirate must have at least 16 I/O pins, 32 is better.
Another interesting function is "automatically determine unknown JTAG pinout", with new bus pirate is very hard add it.
Not has uC ARM, but a 8051, I don't know which is better.
I hope the price will not be more than 50$.
General discussion / rtl-sdr ook analyzer and measure time
I'm analyzing a signal RF OOK with a RTL-SDR device. I'm a newbie with GnuRadio so I use it only for make a wave audio of the signal and analyze it. This is my flow graph taken from here
How I can extract the time in ms/us when there is modulation and when there is silence? I tried with audacity but is not easy to calculate.
I tried to use the project rtl_433 with command line

Code: [Select]
-a -s 1000000
for analyzing but it with give me only:

Code: [Select]
*** signal_start = 8925959, signal_end = 9279917
signal_len = 353958,  pulses = 191
Iteration 1. t: 483    min: 323 (87)    max: 643 (104)    delta 99289
Iteration 2. t: 486    min: 323 (89)    max: 650 (102)    delta 49
Iteration 3. t: 486    min: 323 (89)    max: 650 (102)    delta 0
Pulse coding: Short pulse length 323 - Long pulse length 650

Short distance: 320, long distance: 643, packet distance: 11349
Is there a way for convert pulse length in time? I see if I change the sample rate change also the length.
I tried the project ook_decoder but doesn't work it see only rumors.

Sorry for my very newbie question and thank you for your suggestions.
Project development, ideas, and suggestions / Re: NFC TI TRF7970A Breakout Board for BusPirate or other HW
[quote author="TitanMKD"]but it is planned in fact you are the first one to ask for it.[/quote]
Very strange. Maybe the people not understand, how many feature has this IC.
So I'm waiting for it.

[quote author="TitanMKD"]I also maybe plan to do a new project 100% open source on Kickstarter to include NFC support and a powerful ┬ÁC (multi core ARM based) to build a Hacker/Developer/Tester tools like BusPirate including NFC analyzer(with features like Proxmark3) and other cool high speed protocol analyzer/debugger ... like BusPirate and why not some possible extension for BlueTooth, Zigbee, Wifi ...[/quote]
I would like to see a board with TRF7970A and STM32F4 on it, or better ARM CortexA15 (maybe is too much!!!).
Can you sniff also ISO14443* and 15693 with IC TRF7970A?
Proxmark3 for me is a big delusion. Good hardware, but the firmware is bad.