I'm experimenting with Ghidra and decompiling code intended for the MSP430 FR4133 Launchpad. I'm not sure if it's supported but Ghidra appeared to support MSP430 devices.
For a simple test, I'm using the example code at this link for the MSP EXP430FR4133 Launchpad.
This link contains a simple source program in this directory
MSP-EXP430FR4133_Software_Examples_windows\Firmware\Source\OutOfBox_MSP430FR4133. It's a simple program with a stop watch and temperature sensor.
I decided to load the binary that's also there in the Binary folder.
Then I selected TI MSP430 16-bit and let Ghidra do the analysis. The problem is that the decompiler doesn't provide any functions. I'm wondering if I've selected the wrong architecture or option?
UPDATE 1
I'm posting two extra images which show two functions but there's nothing of any significance.
You are not decompiling a raw binary, but a text file.
If you look at the Readme, it indicates that this is a pre-built TI-TXT image.
Basically, it contains small chunks of data encoded in hexadecimal, prefixed with the load address. See the format definition here.
Ghidra supports similar formats (Intel HEX or Motorola S-Records), but not TI-TXT. I didn't find a tool to convert it to a supported format, but this could probably be done with a small script.
Related
Assume I have sensitive information (passwords, private keys,...) that I saved to a file which I encrypted.
Is there an easy to use tool to convert back and forth between a small file (say 0.5kB) and an image (QR code?) that I can print out to have a safe backup?
You can use LaTeX with the ps-tricks and pst-barcode modules, it produces nice QR codes, and yesm we used it exactly for this purpose: Paper backup of SSH private keys.
Denso Wave of QR code developer distributes software on their site.
Membership registration on the site is required to obtain it.
Even if you can not print with this, there are various tools regardless of free/commercial, so please search.
The maximum amount of data that can be stored in the QR code is 2953 bytes in binary mode.
However, it depends on the ability of the scanner to use.
QR code FAQ #6 Can an image or sound be stored in a QR Code?
I wrote a linux program to do this, called qr-backup.
In researching similar programs as part of it, I discovered a number of alternative projects as well. All of these are also linux-only.
asc2qr.sh
paperbackup. Focused on GPG/SSH key backup. See also the paperkey preprocessor, to reduce the size of keys.
qrdump (incomplete)
qrpdf
If your file is very small (0.5KB is a good cutoff), you can generate one single QR code. An example command-line program to generate it is qrencode. Several web converters are also available.
I am working on a project that involves GNU Radio/GRC and am not very familiar with the software. I am trying to output data to a serial port in GNU Radio using a block, but have not found a way to do so.
I was wondering if there is a pre-defined block that I can use to put this information to a serial port (USB on a Raspberry Pi 3), or if I had to create my own block. And if I had to create my own block, what that code would look like.
I have been able to write the data to a file using the File Sink to make sure I was getting data, and was wondering if the fix is something as simple as changing the File sink to an serial port sink. See picture below:
http://imgur.com/a/BdaMZ
I also did some research and found a github repo that looks like what I need -- unfortunately, the repository that it links to is no longer there. It did mention using pyserial, which is what I believe is meant for creating my own block in python. The link to this repo is below:
https://github.com/jmalsbury/gr-pyserial
… was wondering if the fix is something as simple as changing the File sink to an serial port sink.
Yes! Or No, it's even easier:
So, in fact, you could even simply use your file sink to write to e.g. /dev/ttyS0 (or /dev/ttyUSB0, or whatever is the device name of your serial port), but you'd have to set up the serial port to work like you want it to separately first. A way of doing that would be using stty, e.g.
stty -F /dev/ttyS0 115200
prior to running your flow graph.
Note that practically all in your flow graph point points to you not being sufficiently proficient with GNU Radio to successfully exchange data. I can't cover everything here, please read the official Guided Tutorials, but:
In a flow graph like yours, where the IO is the inherently rate-limiting element, you must not use "Throttle". Throttle is really just a tool to avoid a flowgraph consuming all your CPU (and to slow down simulations)
Giving your files a .grc ending is bad practice, as that is the ending reserved for GNU Radio flow graphs.
Giving it a .txt ending is plain misleading, since there's no text involved whatsoever. The "file format" (I wouldn't even call it a format) is really just plain binary numbers, as your computer handles them; not decimal ASCII representations of these floating point binary numbers
I also did some research and found a github repo that looks like what I need -- unfortunately, the repository that it links to is no longer there. It did mention using pyserial, which is what I believe is meant for creating my own block in python. The link to this repo is below:
Don't know what you're referring to, https://github.com/jmalsbury/gr-pyserial is perfectly existing!
Every Python developer knows tools like Sphinx. You write some text in a markup language, write make in the shell and let some compilers do their job. In the end you get beautiful HTML or PDF.
I am looking for something like that, just for Finite State Machines, e.g. I put SCXML into a file (with a GUI or manually with VIM as I desire) start a compiler and out comes a picture file format that i can use however I please and that looks good even if I don't know what I am doing. Example:
$ vim my-fsm.scxml
$ scxml2svg my-fsm.scxml
writing file...
finished writing my-fsm.svg
$
The closest I got so far is using various Eclipse plugins (years ago, dislike huge IDEs), draw.io or what I am using now: Umlet. Even Umlet has problems, though. For example it doesn't support the workflow I am used to (write text files, start compiler, see beautiful result). The results are often also suboptimal, because the engine is actually quite simple. But everywhere I look for a more useful alternative (python wiki, other SO questions, tools) I still don't find a simple compiler.
Now I would be really happy if anybody would know such a compiler. If not possible a FOSS GUI editors with PNG/SVG export would also be okay.
GraphViz has a file format which can be written manually and compiled to different picture formats.
I wrote some tools to do this: http://goo.gl/V97ft
I´m working on an application based on directshow that has to convert an AVI source file to to an mp4-file that can be played back with Quicktime.
Since 3ivx, according to my web research the most popular way to fulfill this task, has become commercial (and my budget is quite limited), I decided to use a solution based on ffdshow.
I created a simple graph in graphedit, using LAME for audio encoding and GDCL MPEG 4 Multiplexor for the muxing, but everytime I try to play the movie with Quicktime, I´m getting an error indicating a wrong "sample description".
Playback with Windows Media Player is working, except that there is no sound.
My guess is that there´s a problem with the muxer, because every time I try to add audio encoding, graphedit automatically adds an decoder after the encoding unit (see picture link).
http://imageshack.us/photo/my-images/39/graphjrgr.png/
Any ideas on how to integrate ffdshow in a better way, tips for alternative mp4 muxers, or a complete different approach are appreciated!
The GDCL muxer has limited number of audio formats that it supports, probably you should check the source code for the muxer to see if the formats you are using are in fact supported. Basically, you need to choose an audio encoder that the mux recognizes as valid. It might be possible to use GraphEdit to choose different properties for the encoder filter that allow things to work better.
I have had some luck with the Monogram x264(video) and AAC(audio) encoders. See http://blog.monogram.sk/janos/directshow-filters/
Finally, try the debug version of the GDCL mp4 muxer.
Also, you must be aware of MPEG-4 LA licensing requirements for x264 http://www.mpegla.com/main/programs/AVC/Pages/FAQ.aspx
I have ASN format files i have to convert into CSV format also readable one
I need a Decoder with some advanced options like schedule,Auto FTP like that
Pretty old thread but it still comes at top on Google search and it will be good for people to get an answer. Not exactly Unix programming but you can find a "generic" Javascript based ASN decoder at http://lapo.it/asn1js/.
You can also download this and run natively on your box.
Erlang provides very good support for reading and writing BER-, DER- and PER-encoded ASN.1 packets. The Erlang compiler even accepts ASN.1 syntax natively and produces a custom codec as an Erlang module.
It's a whole new programming language for most people though, so whether it's worth learning it just for this exercise, I'll leave up to you. It is a very fun language to learn, however, and will teach you a very different way to think about programming.
You could have a look at asn1 compiler.
It converts asn.1 syntax files to C code.
As Marcelo noted in you question, you didn't exactly say precisely what you need, so can't tell if it covers all your bases, but you will be able to compile the code to binary (from C code, obviously)
There is an open source package called asn1c which will do ASN.1 encoding and decoding. Its a C library that you need to build and then write code around to implement your program. In order to build the library, it requires the ASN.1 syntax file that is used to construct the encoded messages. When decoding, one option is to output the data to an XML file which you would then need to convert to a CSV file somehow. At a minimum, it supports BER, XER, and PER.
In Python, there is also the PyASN1 library and tools: http://pyasn1.sourceforge.net/