Obscure error in the datastream

[Etienne]

Hi all

I've come across an error that occurred when using the older firmware, and I would just like to find out if it's a known bug before I go flying again...

When turning left (i.e.e heading decreasing), as I cross 000, the heading increases, then jumps to the 350's... It's as if the readings from the compass are being interpolated by the turn-rate gyro, and going negative, but because the datastream cannot display a negative heading, it only shows the magnitude, then when the next reading from the compass module is received, the heading is fixed. Is this correct?

Here is a text dump, showing the time frame and what's actually happening...

04520652-021-05130080344+2283-167-00+142600DBFE01CD
04520653-021-05120080345+2283-167-00+142600DBFE01CE
04520654-021-05120070345+2283-167-00+142600DBFE01CE
04520655-021-05120070346+2283-168-00+142600DBFE01D1
04520656-021-05110070346+2283-168-00+142600DBFE01D1
04520657-021-05110060346+2283-168-00+142600DBFE01D1
04520658-022-05110060346+2283-168-00+142600DBFE01D3
04520659-022-05100060346+2283-168-00+142600DBFE01D3
04520660-022-05100050346+2283-169-00+142500DBFE01CA
04520661-022-05090050346+2283-169-00+142500DBFE01D3
04520662-022-05090050346+2283-169-00+142500DBFE01D4
04520663-022-05080040346+2283-169-01+142500DBFE01D4
04520600-023-05080040346+2283-169-00+142500DBFE01CB
04520601-023-05070030346+2283-170-01+142500DBFE01C3
04520602-023-05070030346+2283-170-01+142500DBFE01C4
04520703-023-05060030347+2283-170-01+142600DBFE01C7
04520704-023-05060020347+2283-171-01+142600DBFE01C8
04520705-024-05040020346+2283-171-01+142500DBFE01C6
04520706-024-05040020346+2283-171-01+142600DBFE01C8
04520707-024-05030010346+2283-171-01+142600DBFE01C7
04520708-024-05020010346+2283-171-01+142600DBFE01C7
04520709-024-05010010346+2283-172-01+142600DBFE01C8
04520710-024-05010000346+2283-172-01+142600DBFE01BF
04520711-024-04990000347+2283-172-01+142600DBFE01D1 <-- Going negative internally?
04520712-025-04980000347+2283-172-01+142600DBFE01D2
04520713-026-04970010347+2283-172-01+142700DBFE01D5
04520714-026-04960010347+2283-172-01+142700DBFE01D5
04520715-026-04940010346+2283-172-01+142600DBFE01D2
04520716-027-04940020347+2283-172-01+142600DBFE01D6
04520717-027-04920020347+2283-173-01+142700DBFE01D7
04520718-027-04910020347+2283-173-00+142700DBFE01D6
04520719-027-04890030346+2283-173-00+142700DBFE01DE
04520720-027-04880030346+2283-173-00+142800DBFE01D6
04520721-028-04860030347+2283-173-00+142700DBFE01D6
04520722-029-04850040347+2283-173-00+142700DBFE01D8
04520723-029-04840040347+2283-174-00+152700DBFE01DA
04520724-030-04820040348+2283-174-00+142700DBFE01D1
04520725-030-04810050347+2283-174+01+152700DBFE01D1
04520726-030-04800050347+2283-174+01+152800DBFE01D2
04520727-031-04790050348+2283-174+01+152800DBFE01DD
04520728-031-04770060348+2283-175+02+152800DBFE01DF
04520729-032-04770060348+2283-175+01+152800DBFE01E0
04520730-031-04760060348+2283-175+01+152800DBFE01D6
04520731-032-04740070348+2283-175+02+152800DBFE01D8
04520732-032-04740070348+2283-175+02+152800DBFE01D9
04520733-033-04723530348+2283-175+02+152900DBFE01DE <-- Fixed!
04520734-033-04723520348+2283-175+02+152900DBFE01DE
04520735-034-04723520348+2283-175+02+152900DBFE01E0
04520736-034-04713520348+2283-175+02+152800DBFE01DF
04520737-034-04703510348+2283-176+02+152800DBFE01DF
04520738-035-04703510349+2283-176+03+142800DBFE01E2
04520739-035-04693510349+2283-176+02+142800DBFE01EA

Has this been actively fixed in the latest release?

Thanks
Etienne

 

[dynonsupport]

Nope - it looks like you've found a bug that will be fixed in the future. Thanks!

 

[Etienne]

Pity... I was hoping you'd say that it had been found and fixed :'(

When can we expect the next release? (the ever-present question)

 

[dynonsupport]

No firm target date to report yet.

 

[Etienne]

No firm target date to report yet.

Ok, how about a soft one? Are we talking days, weeks, months or years? (Basically, should I try and find a workaround in my code, or will it be a wasted effort? )

Thanks as always for the prompt responses!

 

[dynonsupport]

Months.

 

[Etienne]

Months.

Thanks... I shall persevere and will post the C workaround once I have one

 

[Etienne]

Well, I never did find a workaround, despite many late nights trying to find one

But now there's the shiny new firmware ;D ! Has this issue been fixed?

 

[dynonsupport]

We've updated the firmware announcement page to give our expected time frame of a June release for the firmware:

http://www.dynonavionics.com/docs/news_spring_2007_firmware.html

 

[Etienne]

Apologies for dragging this up again, but I'm still a bit confused by the last reply... Assuming the shiny new firmware gets it's bug discovered on the weekend sorted out, does this mean that the problem posted here originally will also be fixed? I'm really hoping I won't need to wait another whole dev cycle...

Maybe one of the beta testers could post some output from the datastream of the aircraft turning left through north (i.e. the heading decreasing through 000)?

Thankyou!!
Etienne

 

[dynonsupport]

Yes, the heading datastream bug is fixed in the upcoming release.

 

[Etienne]

Yay!

Very very good news - thankyou!