PH 29 and 30

[daniekuys]

Hi Pete,

Can you possibly shed some light on weird behaviour from these 2 pigeonholes.

#Expanding the 16bit variable for the Radial from bytes 2-3 gives a variable that behaves as expected until the aircraft passes from radial 179 to 180. At that point the variable displayed jumps to 356 and carries on from there into the 400's and 500's, carrying a difference of about +176 over and above the actual expected value, until you cross from actual radial 359 (527) to radial 000. Then the variable value jumps back to 000 and carries on normally to 179.

Looking at the Radial value with FS Interrogator, however, gives correct behaviour from radial 000 through 360 as expected

Thanks a stack

[Pete Dowson]

Can you possibly shed some light on weird behaviour from these 2 pigeonholes.

I assume you are talking about EPICINFO? You don't actualy say.

I'm sorry, but I don't use it any more so cannot really check what you are saying. But it has not been changed in years, and certainly the correct radial was always shown on my KR1 back when I used it.

Can you use the logging facilities, please? That's what they are for. If you cannot understand the logging just send it to me and I'll check it for you.

Regards,

Pete

[daniekuys]

Hi Pete please look at the extract from my log file .

Hoe do I construct a value from 0 to 360 . Up to 180 it seems quite easy, but what about 181 to 360?

********* EPICINFO Module, Version 4.21 (9SEP03) by Pete Dowson *********

Panel=AIRCRAFT\beech_king_air_350\panel.rmi\panel.cfg

Epic Ref= Icarus-BE200

CFG: Reading C:\FS2002\EPICINFO.CFG

************************************************

CFG: Processing section [All]

CFG: RESEND=0

************************************************

CFG: Processing section [icarus-BE200]

CFG: Log=2

CFG: LocInterceptZone=90,125

CFG: Sets=FUEL NAV

CFG: WHISKEY_COMPASS_DEGREES=1

Frequency not set

27537 PH040 = 000 000, 00000 [Hex 00 00, 00 00], orig val=0 [0x0000000000000000] VOR1_SIGNAL_STRENGTH

27537 PH029 = 255 000, 00000 [Hex FF 00, 00 00], orig val=0 [0x0000000000000000] NAV1_VOR_RADIAL

Frequency set on Radial 022

67332 PH040 = 007 027, 02707 [Hex 07 1B, 93 0A], orig val=2707.29 [0x40A5269700000000] VOR1_SIGNAL_STRENGTH

67332 PH029 = 022 000, 00022 [Hex 16 00, 16 00], orig val=4079 [0x40AFDDFFFFFFFFD5] NAV1_VOR_RADIAL

Frequency set on Radial 068

154397 PH040 = 087 010, 01087 [Hex 57 0A, 3F 04], orig val=1087.16 [0x4090FCA880000000] VOR1_SIGNAL_STRENGTH

154397 PH029 = 068 001, 00168 [Hex 44 01, A8 00], orig val=30621 [0x40DDE73FFFFFFFD7] NAV1_VOR_RADIAL

Frequency set on Radial 247

252753 PH040 = 054 010, 01054 [Hex 36 0A, 1E 04], orig val=1053.55 [0x4090762FE0000000] VOR1_SIGNAL_STRENGTH

252753 PH029 = 242 255, 65422 [Hex F2 FF, 8E FF], orig val=-20782 [0xC0D44B7FFFFFFFE5] NAV1_VOR_RADIAL

Frequency set on Radial 289

283343 PH040 = 034 009, 00934 [Hex 22 09, A6 03], orig val=933.594 [0x408D2CC060000000] VOR1_SIGNAL_STRENGTH

283343 PH029 = 184 000, 65464 [Hex B8 00, B8 FF], orig val=-13076 [0xC0C989FFFFFFFFDE] NAV1_VOR_RADIAL

Frequency set on Radial 333

322227 PH029 = 228 000, 65508 [Hex E4 00, E4 FF], orig val=-5020 [0xC0B39BFFFFFFFFE6] NAV1_VOR_RADIAL

322227 PH040 = 006 009, 00906 [Hex 06 09, 8A 03], orig val=906.495 [0x408C53F5E0000000] VOR1_SIGNAL_STRENGTH

Frequency set on Radial 009

351482 PH029 = 009 000, 00009 [Hex 09 00, 09 00], orig val=1642 [0x4099A7FFFFFFFFDE] NAV1_VOR_RADIAL

351482 PH040 = 019 008, 00819 [Hex 13 08, 33 03], orig val=819.067 [0x4089988860000000] VOR1_SIGNAL_STRENGTH

Frequency set on Radial 091

372483 PH040 = 006 007, 00706 [Hex 06 07, C2 02], orig val=705.73 [0x40860DD780000000] VOR1_SIGNAL_STRENGTH

372483 PH029 = 091 000, 00091 [Hex 5B 00, 5B 00], orig val=16562 [0x40D02C7FFFFFFFEA] NAV1_VOR_RADIAL

Frequency not set

384822 PH040 = 000 000, 00000 [Hex 00 00, 00 00], orig val=0 [0x0000000000000000] VOR1_SIGNAL_STRENGTH

384822 PH029 = 255 000, 00000 [Hex FF 00, 00 00], orig val=0 [0x0000000000000000] NAV1_VOR_RADIAL

425873 QP101 = Kill Done

CFG: Mouse positions cleared

********* EPICINFO Log file closed *********

[Pete Dowson]

Hoe do I construct a value from 0 to 360 . Up to 180 it seems quite easy, but what about 181 to 360?

The values 181 to 359 are arriving as negative numbers, which is screwing things in bytes 0 and 1 up a bit. Is this with FS2004? I'll look to see if this has changed. If so I'll see if it can be fixed. The data is actually there though, if you want to use it as it stands.

==============

Frequency set on Radial 068

154397 PH029 = 068 001, 00168 [Hex 44 01, A8 00], orig val=30621

This is 168, not 68. If you are only reading the first byte you will get the units and tens only. The 3rd-4th bytes give the correct binary, the 1st and 2nd are split inot units, tens in one, hundreds and thoiusands in the other. This is for the convenience of some display systems. It is all covered in the documentation.

It is going wrong for the -ve values it is receiving -- I think this must have changed in FS2004, if that is what you are using:

Frequency set on Radial 247

252753 PH029 = 242 255, 65422 [Hex F2 FF, 8E FF], orig val=-20782 [0xC0D44B7FFFFFFFE5] NAV1_VOR_RADIAL

This -20782 value represents -114, as in bytes 3-4 of the PH (65422 is 16-bit -114). -114 is the same as +246 (not 247).

Frequency set on Radial 289

283343 PH029 = 184 000, 65464 [Hex B8 00, B8 FF], orig val=-13076 [0xC0C989FFFFFFFFDE] NAV1_VOR_RADIAL

65464 is -72 which is the same as +288, not 289.

Frequency set on Radial 333

322227 PH029 = 228 000, 65508 [Hex E4 00, E4 FF], orig val=-5020 [0xC0B39BFFFFFFFFE6] NAV1_VOR_RADIAL

65508 is -28, which is the same as +332 not 333.

=================

So, you see, you can derive the correct positive number. But if you'd like to wait a couple of days, I'll look to see what has changed.

Derivation: if top bit of 4th byte is set, then do this:

value = 360 - (256 - 3rd byte).

i.e. 104 + 3rd byte.

Regards,

Pete