Binary DataFlash Log inside. How to parse it in my own program?

Andrei_Khotko · June 21, 2019, 11:31am

I want to parse Binary DataFlash Log by myself to create my own BinaryLog Viewer application. And the problem is I can’t understand the format of binary log file, how the data is written into file, in what order, etc.

Especially I need to know how can I get a list of values of specific parameter. Where can I find the information about it? Or how can I contact with Michael Oborne?

I’ve downloaded MissionPlanner Project from github and opened it. Also I’ve read a piece of code LogBrowse.cs, but still can’t understand the inner format of bin log file.

james_pattison · June 23, 2019, 6:44am

@peterbarker might have some tips

Andrei_Khotko · June 24, 2019, 8:10am

How could I contact him? Sorry, I’m a newbee on this forum, didn’t find any button to write a direct message to user.

james_pattison · June 24, 2019, 8:33am

I tagged him so he should get an email notification of the post (although I’m sure he gets many).

Regards,

James

peterbarker · June 24, 2019, 8:33am

I want to parse Binary DataFlash Log by myself to create my own BinaryLog
Viewer application. And the problem is I can¢t understand the format of
binary log file, how the data is written into file, in what order, etc.

There are several implementations.

In Python:

github.com

ArduPilot/pymavlink/blob/master/DFReader.py#L1


#!/usr/bin/env python
'''
APM DataFlash log file reader


Copyright Andrew Tridgell 2011
Released under GNU GPL version 3 or later


Partly based on SDLog2Parser by Anton Babushkin
'''
from __future__ import print_function
from builtins import range

In
C++:https://github.com/ardupilot/ardupilot/blob/master/Tools/Replay/DataFlashFileReader.cpp#L64

Especially I need to know how can I get a list of values of specific

The log file is self-describing. AutoPilot parameter information is
described elsewhere (the ArduPilot Wiki, for example).

Peter

Andrei_Khotko · June 24, 2019, 9:38am

Thanks, Peter! I will look into it.