I tried to find same question with me several times but I failed.
I can not open my Dataflash logs but I can Telemetry log.
When I try to open flash logs, the error message box pop up
’ Log Browse will not function correctly without FMT messages in your log. These appear to be missing from your log.’
I’m using arducopter 3.3 with mission planner ver 1.3.34.
There is no direction about this kind of error in the ardupilot site…
You guys know what the reason is?
I check the bin files.
and all data is ‘255’. I do not know why…
and here is my dataflash log link:
drive.google.com/file/d/0B-f5-n … sp=sharing
drive.google.com/file/d/0B-f5-n … sp=sharing
p.s. I’m using Pixhawk
[quote=“TCIII”]@lsm0828,
What is your LOG_BITMASK parameter value set to?
Regards,
TCIII GM[/quote]
Where can I check this value??
[quote=“TCIII”]@lsm0828,
It is in the Mission Planner full parameter list.
Regards,
TCIII GM[/quote]
I found it!
value is 176126.
Format your SD card again (FAT32).
The same thing happened to me with Copter 3.3.2!
At first it worked for a few flights and then logs were just FFs.
I also checked LOG_BITMASK (same value as yours) and investigated my power supply because logs worked while I used a Power Module and then on a flight without power module I first encountered the broken logs.
In the end it turned out that the memory card must have been corrupted. I got the first hunch that something was funny when Mission Planner would say that there are no dataflash logs when downloading over MavLink but I could see BIN files when reading the SD card directly.
Anyhow, it seems to work for me now. I’m still wondering if maybe a power spike from my BEC broke something so will fly with a power module for now…