LFS Forum - How to substract variable Flags? OutGauge

#1 - Erazotropa

How to substract variable Flags? OutGauge

Sun 11 Jan 2009, 22:13

Hi all!

I am recently active with VB6 and making a application that is receiving the OutGauge UDP packets.

With VB6 i have created a Virtual dashboard that will visible on a secondary monitor.

All is going very well exept 1 thing....


'Each update sends the following UDP packet :
Private Type OutGaugePacket
    Time(0 To 3) As Byte        'time in milliseconds (to check order)
    Car(0 To 3) As Byte         'Car name
    Flags(0 To 1) As Byte       'Combination of OG_FLAGS, see below
    Gear As Byte                'Reverse:0, Neutral:1, First:2...
    SpareB As Byte              'Spare
    Speed As Single             'M/S
    Rpm As Single               'RPM
    Turbo As Single             'BAR
    EngTemp As Single           'C
    Fuel As Single              '0 to 1
    OilPress As Single          'BAR
    Spare1 As Single            'Spare
    Spare2 As Single            'Spare
    Spare3 As Single            'Spare
    Throttle As Single          '0 to 1
    Brake As Single             '0 to 1
    Clutch As Single            '0 to 1
    Display1(0 To 15) As Byte   'Usually Fuel
    Display2(0 To 15) As Byte   'Usually Settings
    ID As Long                  '(optional ID - if specified in cfg.txt)
End Type

Private Const OG_SHIFTLIGHT As Long = 1
Private Const OG_FULLBEAM As Long = 2
Private Const OG_HANDBRAKE As Long = 4
Private Const OG_PITSPEED As Long = 8
Private Const OG_TC As Long = 16
Private Const OG_HEADLIGHTS As Long = 32
Private Const OG_SIGNAL_L As Long = 64
Private Const OG_SIGNAL_R As Long = 128
Private Const OG_REDLINE As Long = 256
Private Const OG_OILWARN As Long = 512
Private Const OG_1 As Long = 1024
Private Const OG_2 As Long = 2048
Private Const OG_3 As Long = 4096
Private Const OG_4 As Long = 8192
Private Const OG_KM As Long = 16384
Private Const OG_BAR As Long = 32768

How do I get the OG flags out of the FLAGS variable?

I want to copy the result into a new variable that would be 1 or 0

Anyone got an idea?

Kind Regards
Bjorn Pasteuning

#2 - DarkTimes

Sun 11 Jan 2009, 22:47

edit: irrelevant.

#3 - Radekteam

Sun 11 Jan 2009, 22:52

I don't know VB but maybe you should try this

if Flags AND 256 = NOT 0 //og_redline is on

#4 - Dygear

Mon 12 Jan 2009, 07:41

List of all bit values:

0000000000000000 = 0     None
1000000000000000 = 1     OG_SHIFTLIGHT
0100000000000000 = 2     OG_FULLBEAM
0010000000000000 = 4     OG_HANDBRAKE
0001000000000000 = 8     OG_PITSPEED
0000100000000000 = 16    OG_TC
0000010000000000 = 32    OG_HEADLIGHTS
0000001000000000 = 64    OG_SIGNAL_L
0000000100000000 = 128   OG_SIGNAL_R
0000000010000000 = 256   OG_REDLINE
0000000001000000 = 512   OG_OILWARN
0000000000100000 = 1024  OG_1
0000000000010000 = 2048  OG_2
0000000000001000 = 4096  OG_3
0000000000000100 = 8192  OG_4
0000000000000010 = 16384 OG_KM
0000000000000001 = 32786 OG_BAR

Shift light is active, driver is in the redline.

1000000010000000 = 257 OG_SHIFTLIGHT & OG_REDLINE

In this case, the driver is revving the nuts off the engine.

Shift light is active, driver is in the redline and oil warning light is on.

1000000011000000 = 769 OG_SHIFTLIGHT & OG_REDLINE & OG_OILWARN

In this case the driver is revving the nuts off the engine and has done so for so long he heated up the oil so much that your now also throwing a warning light for oil temp too.

----

So now you have an idea on what it looks like to the computer. How do we now test for this situation? Well first, we have to know that we are reading this information from the flags part of the OutGauge Packet and now we test aginst each value for the state of the Flags part of the packet to see if that value is set in the Bit Field.

In PHP:



<?php 
if ($OutGaugePack->Flags & OG_SHIFTLIGHT)
    // Shift Light Is On;
if ($OutGaugePack->Flags & OG_FULLBEAM)
    // Full Beams Are On;
if ($OutGaugePack->Flags & OG_HANDBRAKE)
    // Hand Break is Active.
if ($OutGaugePack->Flags & OG_PITSPEED)
    // Pit speed Limit is On.
if ($OutGaugePack->Flags & OG_TC)
    // Traction Control is active.
if ($OutGaugePack->Flags & OG_HEADLIGHTS)
    // Headlights are On.
if ($OutGaugePack->Flags & OG_SIGNAL_L)
    // Left Turn Signal is Active.
if ($OutGaugePack->Flags & OG_SIGNAL_R)
    // Right Turn Signal is Active.
if ($OutGaugePack->Flags & OG_REDLINE)
    // Rev guage is on or above red line.
if ($OutGaugePack->Flags & OG_OILWARN)
    // Oil Warning Light is On.
if ($OutGaugePack->Flags & OG_1)
    // Not a clue.
if ($OutGaugePack->Flags & OG_2)
    // Not a clue.
if ($OutGaugePack->Flags & OG_3)
    // Not a clue.
if ($OutGaugePack->Flags & OG_4)
    // Not a clue.
if ($OutGaugePack->Flags & OG_KM)
    // Not a clue.
if ($OutGaugePack->Flags & OG_BAR)
    // Not a clue.
?>

Might be the same operator in VB. But, let me google that for yo ... BitFields in Visual Basic

#5 - dawesdust_12

Mon 12 Jan 2009, 09:34

Not sure what OG_1 - OG_4 are, but I believe OG_KM and OG_BAR are simply reporting what the LFS users settings are set to, rather Metric or Imperial, or PSI/BAR... at least that'd be my best understanding of it.

#6 - Silox

Mon 12 Jan 2009, 17:28

Well, if you don't know it, it's easy to test...

Just let LFS output all those variables, when you leave the pits for example...

I could do it, and put the info here, too bad I'm kinda busy now

#7 - Napalm Candy

Mon 12 Jan 2009, 19:04

Quote :'Shift Ligth
Select Case Packet.Flags And OG_SHIFTLIGHT
Case 0
ShiftLight = False
Case 1
ShiftLigth = True
End Select
picShiftLight.Visible = ShiftLigth

This is the code that I use for every Flag

How do you do this "digital" numbers? I want to make something like that, but I don't know how

-

(Silox) DELETED by Silox

Mon 12 Jan 2009, 19:08

#8 - Napalm Candy

Mon 12 Jan 2009, 19:13

I Attach my interface, I like you neddles how do you this triangle? Or better, do you know how to rotate an image? But first of this, how to load a image with transparent background.

Attached images

#9 - Erazotropa

Mon 12 Jan 2009, 19:25

Hi all!

Thanks for all your replies and help!

I have figured out howto..


            If (Packet.Flags And OG_SHIFTLIGHT) > 0 Then
                LEDShiftLigth.Visible = True
            Else
                LEDShiftLigth.Visible = False
            End If
            
            If (Packet.Flags And OG_FULLBEAM) > 0 Then
                Headlights.Visible = True
            Else
                Headlights.Visible = False
            End If
            
            If (Packet.Flags And OG_SIGNAL_L) > 0 Then
                LeftSignalLight.Visible = True
            Else
                LeftSignalLight.Visible = False
            End If
            
            If (Packet.Flags And OG_SIGNAL_R) > 0 Then
                RightSignalLight.Visible = True
            Else
                RightSignalLight.Visible = False
            End If

Works fantastic!

#10 - Stuff

Mon 12 Jan 2009, 21:07

Optimization note.. If an if expression is true, don't assign a variable true.. just assign it the expression.

Like so:


LEDShiftLigth.Visible = (Packet.Flags And OG_SHIFTLIGHT) > 0

#11 - Erazotropa

Mon 12 Jan 2009, 23:58

Quote from Stuff :Optimization note.. If an if expression is true, don't assign a variable true.. just assign it the expression.

Like so:


LEDShiftLigth.Visible = (Packet.Flags And OG_SHIFTLIGHT) > 0

Ok thanks for the tip!

#12 - K-Dog

Sorry....

Sat 18 Apr 2009, 09:37

Sorry for the gravedig..... but does anyone have a version of this that they would be willing to share with me, or just all the code i need to do the shift light?

Thanks in advance,

Kyle