Logfile time variable likely overflowing after 4294.96sec

[YohanHadji]

Current Behavior

INAV 7.0.0 Blackbox logging is stopped just before reaching 4,294,967,295us probably because of a uint32 overflow somewhere in the log process. This prevents any log file to run for more than 1h11min after boot.

Steps to Reproduce

1. Enable Blackbox logging
2. Arm
3. Wait more than 4,294,967,295us
4. Check the log file and see that the log file is stopping right before reaching 4,294,967,295us

Expected behavior

It should be possible have log files lasting multiple hours

Suggested solution(s)

Handle the time overflow correctly

---

• FC Board name and vendor: MatekF405 Mini TE
• INAV version string: 7.0.0

[sensei-hacker]

Flying for multiple hours? How big is your battery?

[YohanHadji]

you can fly forever when the wind and sun is you propulsion :)

[sensei-hacker]

Okay. The number of people who need to log multiple hours of each flight is probably pretty small. So if you want to adjust the code to roll over to zero or whatever, we'd be happy to look at a pull request.

Writing and testing it isn't going to be on my top 10 list, so it would be up to you or someone else who wants it.

[stronnag]

This is not a bug in the firmware, it is a bug in the log decoder:

• For blackbox_decode there is a bug in the time rollover accumulator. This will be fixed in the appropriate repository in the next 24 hours.
• For blackbox explorer I suspect that it does not implement time rollover.

Example:

Extant blackbox_decode

$ bbsummary  truncated.TXT
Flight   : A-MODEL on 2022-06-19 14:35:28
Firmware : INAV 5.0.0 (6e88012b) MATEKF405SE of Jun 16 2022 22:34:35
Size     : 22.42 MB
Log      : truncated.TXT / 1
Range    : 8495 m at 26:40
Current  : 31.9 A at 00:11
Distance : 57827 m
Duration : 70:08
Altitude : 1255.6 m at 70:06
Speed    : 40.9 m/s at 27:13
Disarm   : Switch

The log ends with the vehicle c. 3.6 km from home (to which it returned, eventually).

With fixed blackbox_decode:

[jrh@eeyore]$ bbsummary truncated.TXT
Log      : truncated.TXT / 1
Flight   : A-MODEL on 2022-06-19 14:35:28
Firmware : INAV 5.0.0 (6e88012b) MATEKF405SE of Jun 16 2022 22:34:35
Size     : 22.42 MB
Altitude : 2002.4 m at 84:19
Speed    : 40.9 m/s at 27:13
Range    : 8495 m at 26:40
Current  : 31.9 A at 00:11
Distance : 79203 m
Duration : 103:13
Disarm   : Switch

Closing, as this is not a firmware bug.

[stronnag]

Fixed in blackbox-tools-inav iNavFlight/blackbox-tools#98