Support Driverstation log version 4.

[caseyjbrotherton]

dsevents looks the same between version 3 and 4. By taking a small file, opening it in driverstation, and stepping through header, LV timestamp, LV string. It seems to match up.

The python script did not work for the dslog. It read things in…but a few things were off:

• Looking in Driverstation, the voltage seemed to range between 12.5 to 12.7 volts from what I could see. * The Robot was never placed into autonomous mode. Driver station also showed 24 PDP’s and all of them were noted as zero.
• The python script though created a csv where auto was true, and voltage was all over the place.
• I opened the log using od -ha, and looked for repeating patterns.
• It seemed like after the 10 byte information of each line, there were 68 bytes before similar 10 bytes started repeating again.
• My example dslog was 489470 bytes long. With a 20 byte version/LV timestamp header, that left 48950 bytes that should be evenly divisible, and 48950/78=6275
• If I change the python to assign 68 bytes to the PDP, it’s still not correct, as some of the original 16 PDP’s are showing values.
• However the values for the first 10 bytes match with what would be reasonable for when the driver station was logging.

If I get closer to the format, I will open a pull request.

If I can get closer to what the format should be, I will open a pull request for the python script.

[prensing]

Hi. I saw your post on CD.

I assume that log version 4 is generated from the 2022 Driver Station. We have not fired that up yet so I don't have an example. It makes sense that the number of PDP slots is now 24, given the new Rev control system. If you have an example file, feel free to post it, but not sure when I can look (build season!!). And I am happy to take a PR.

[prensing]

Oops did not mean to close this.

[caseyjbrotherton]

https://github.com/caseyjbrotherton/dslogparser/tree/quickhack has a quickhack that allows what seems to be correct parsing of the flags.

It doesn't have correct PDP versions. If I can figure out what is missing, or somebody updates the thread, then I will update my fork and make a pull request.