FalconSharedMemoryArea2 about simscript

[nmeier]

Hi

I reviewed up to pilotsStatus, and believe you have to use the multipliers for the array lengths. After that the fields might be from a newer version of FlightData.h? Where can I see the latest?

Nils

redacted

[dglava]

Here's a link to a copy of version 4.35 FlightData.h: https://gist.github.com/dglava/55a823cb6d8f899f11790b2a4c3e4356

Thanks for looking into this.

[nmeier]

ok, try the struct description in my post #2 (comment), that looks right atm

[dglava]

I have tried it, but I'm still getting weird data. I tried a few things:

• "caraAlow" is giving me"1.3508517196091237e-42" instead of the CARA ALOW value.
• "turnRate" is giving me constantly 0.0

But then stuff like "cmdsMode" seems to give me the correct data. Do you reckon it's an issue with the FlightData2 class or with the shared memory in Falcon BMS itself?

[nmeier]

Ok, found another mistake that would break anything after RTT_*, see below

class FLIGHTDATA2(ctypes.Structure):
    _fields_ = (
        ("nozzlePos2", ctypes.wintypes.FLOAT),
        ("rpm2", ctypes.wintypes.FLOAT),
        ("ftit2", ctypes.wintypes.FLOAT),
        ("oilPressure2", ctypes.wintypes.FLOAT),
        ("navMode", ctypes.wintypes.BYTE),
        ("AAUZ", ctypes.wintypes.FLOAT),
        ("tacanInfo", ctypes.wintypes.CHAR * 2),
        
        ("AltCalReading", ctypes.wintypes.INT),
        ("altBits", ctypes.wintypes.INT),
        ("powerBits", ctypes.wintypes.INT),
        ("blinkBits", ctypes.wintypes.INT),
        
        ("cmdsMode", ctypes.wintypes.INT),
        ("BupUhfPreset", ctypes.wintypes.INT),
        
        ("BupUhfFreq", ctypes.wintypes.INT),
        ("cabinAlt", ctypes.wintypes.FLOAT),
        ("hydPressureA", ctypes.wintypes.FLOAT),
        ("hydPressureB", ctypes.wintypes.FLOAT),
        ("currentTime", ctypes.wintypes.INT),
        ("vehicleACD", ctypes.wintypes.SHORT),
        ("VersionNum", ctypes.wintypes.INT),

        ("fuelFlow2", ctypes.wintypes.FLOAT),

        ("RwrInfo", ctypes.wintypes.CHAR * 512),
        ("lefPos", ctypes.wintypes.FLOAT),
        ("tefPos", ctypes.wintypes.FLOAT),

        ("vtolPos", ctypes.wintypes.FLOAT),

        ("pilotsOnline", ctypes.wintypes.CHAR),
        ("pilotsCallsign", ctypes.wintypes.CHAR * 32 * 12),
        ("pilotsStatus", ctypes.wintypes.CHAR * 32),

        ("bumpIntensity", ctypes.wintypes.FLOAT),

        ("latitude", ctypes.wintypes.FLOAT),
        ("longitude", ctypes.wintypes.FLOAT),

        ("RTT_size", ctypes.wintypes.USHORT * 2),
        ("RTT_area", ctypes.wintypes.USHORT) * 7 * 4,

        ("iffBackupMode1Digit1", ctypes.wintypes.CHAR),
        ("iffBackupMode1Digit2", ctypes.wintypes.CHAR),
        ("iffBackupMode3Digit1", ctypes.wintypes.CHAR),
        ("iffBackupMode3Digit2", ctypes.wintypes.CHAR),

        ("instrLight", ctypes.wintypes.CHAR),

        ("bettyBits", ctypes.wintypes.UINT),
        ("miscBits", ctypes.wintypes.UINT),
        ("RALT", ctypes.wintypes.FLOAT),
        ("bingoFuel", ctypes.wintypes.FLOAT),
        ("caraAlow", ctypes.wintypes.FLOAT),
        ("bullseyeX", ctypes.wintypes.FLOAT),
        ("bullseyeY", ctypes.wintypes.FLOAT),
        ("BMSVersionMajor", ctypes.wintypes.INT),
        ("BMSVersionMinor", ctypes.wintypes.INT),
        ("BMSVersionMicro", ctypes.wintypes.INT),
        ("BMSBuildNumber", ctypes.wintypes.INT),
        ("StringAreaSize", ctypes.wintypes.UINT),
        ("StringAreaTime", ctypes.wintypes.UINT),
        ("DrawingAreaSize", ctypes.wintypes.UINT),

        ("turnRate", ctypes.wintypes.FLOAT),
)

[dglava]

Thanks, it's working!

Sorry for bothering you, but would you also know why this additional Falcon BMS shared memory part isn't working when trying to access it? It's the IntelliVibe values which can be seen in the "IVibe" tab inside Falcon BMS shared memory viewer. It's not documented in the FlightData.h file. Here's a related thread and the only documentation I could find.

I have created a new class and defined those fields according to the info above. The first few ones (BYTE and INT) are working, but the BOOL fields aren't.

Here's what I have:

class IVDATA(ctypes.Structure):
    _fields_ = (
        ("AAMissileFired", ctypes.wintypes.BYTE),
        ("AGMissileFired", ctypes.wintypes.BYTE),
        ("BombDropped", ctypes.wintypes.BYTE),
        ("FlareDropped", ctypes.wintypes.BYTE),
        ("ChaffDropped", ctypes.wintypes.BYTE),
        ("BulletsFired", ctypes.wintypes.BYTE),
        ("CollisionCounter", ctypes.wintypes.INT),
        ("IsFiringGun", ctypes.wintypes.BOOL),
        ("IsEndFlight", ctypes.wintypes.BOOL),
        ("IsEjecting", ctypes.wintypes.BOOL),
        ("In3D", ctypes.wintypes.BOOL),
        ("IsPaused", ctypes.wintypes.BOOL),
        ("IsFrozen", ctypes.wintypes.BOOL),
        ("IsOverG", ctypes.wintypes.BOOL),
        ("IsOnGround", ctypes.wintypes.BOOL),
        ("IsExitGame", ctypes.wintypes.BOOL),
        ("Gforce", ctypes.wintypes.FLOAT),
        ("eyex", ctypes.wintypes.FLOAT),
        ("eyey", ctypes.wintypes.FLOAT),
        ("eyez", ctypes.wintypes.FLOAT),
        ("lastdamage", ctypes.wintypes.INT),
        ("damageforce", ctypes.wintypes.FLOAT),
        ("whendamage", ctypes.wintypes.INT)
)

def getIV():
    global _pIV
 
    if _pIV == None:
 
        handle = ctypes.windll.kernel32.OpenFileMappingA(FILE_MAP_READ|FILE_MAP_WRITE, False, "FalconIntellivibeSharedMemoryArea".encode())
        if handle:
            ctypes.windll.kernel32.MapViewOfFile.restype = ctypes.POINTER(IVDATA)
            _pIV = ctypes.windll.kernel32.MapViewOfFile(handle, FILE_MAP_READ|FILE_MAP_WRITE, 0, 0, 0)
 
    if not _pIV:
        raise EnvironmentError("can't access falcon shared memory area")
 
    return _pIV.contents

When I do print(getIV().In3D) it's giving me 1065307441 instead of something resembling a boolean value. I don't know anything about this really, but was wondering if it could have something to do with this?

[nmeier]

Glad it works, can you create a pull request so your shared memory area 2 ends up in code?

For your additional example try ctypes.wintypes.BOOLEAN (not BOOL which seems to be a long)

[dglava]

Using BOOLEAN instead of BOOL fixed it!