Absolutely agree with that, really enjoyed the challenge and what a buzz when the penny dropped, albeit short lived re below, my final hurdle brings new territory now with error messages 😁 So the Code works a?

Could you perhaps see anything wrong with these lines of code. Linda is blowing an error at me and I really have got no clue, I truly have tried everything I can think of, unless I need to declare & initialise a variable? But I think not because I cannot find the original functions initialised anywhere.

I have verified the LvAR - Kn62InnerKnobPull - using Linda's Tracer (setting the values 0 & 1 via Shift+Ctrl+Alt+F10)  

A2A LvAR list states - DME inner knobPull - (L:Kn62InnerKnobPull,bool)  

[E] *** LUA Error: ...linda/aircrafts/A2A_Piper_PA28_180_Cherokee/user.lua:65: attempt to call global 'PA28_5K_on' (a nil value)

-- Original Functions 
-- A2A_DME_toggle
-- A2A_ADFident_toggle

-- Amended both error the same.

function PA28_5K_toggle ()

    if ipc.readLvar("Kn62InnerKnobPull") == 0 then
       PA28_5K_on ()
	else
       PA28_5K_off ()
	end
end
-- -------------------------------------------------
function PA28_5K_toggle ()

	if _tl("Kn62InnerKnobPull", 0) then
       PA28_5K_on ()
	else
       PA28_5K_off ()
	end
end

Thanks Andrew, 

What is function PA28_5K_on? The error indicates that it does not exist or has not been defined as a function (ie. nil means it is undefined). It is not your if/then statements or the Lvar that are at fault. 

See you are a good teacher, my code is good, thank you 😀

This to pull (Toggle) the inner rotary encoder knob out on the DME to manipulate the last digit. I have scoured the A2A Linda modules looking for this but it seems the A2A Linda Modules do not include the radio changing knobs (encoders) rather they rely on the built in controls in P3D / FSX found in the Linda lib-fsx-lua file i.e.

function _ADF1_RADIO_TENTHS_DEC (p)     ipc.control( 66453, p )  end 
function _ADF1_RADIO_TENTHS_INC (p)     ipc.control( 66454, p )  end 

I have looked at the P3D Event ID and cannot find anything like this for the DME to alter the tenths frequency. (On the COM/NAV 1-2 I have used Lindas shift ability to programme the tenths)

Outter Knob will change the 100's 10's 1's from -117.00khz to 108.00khz

Inner Knob will change the first decimal - 108.60

PA28_5k_On should pull the inner knob out to change the second decimal - 108.65 

Observation: -  

7 hours ago, ScotFlieger said:

"The error indicates that it does not exist or has not been defined as a function"

Whilst the DME encoder can be used in the Linda Tracer successfully to both see the cockpit knob move in/out (push/pull) and the digits change on the DME display, it seems to me that this is missing from the P3D EventId list http://www.prepar3d.com/SDKv3/LearningCenter/utilities/variables/event_ids.html 

So I need to define a function? No because its already define in Linda because Tracer operates the encoder pull/push. So I need to find the function in Linda?

 

Edited November 10, 20196 yr by Ace9
Typo

Where the built-in FSX functions (offsets/control) work with an aircraft we tend to leave these well alone. As you are finding, radios and nav aids tend to be a mystery unto themselves.

The ipc.control(value) refers to the FSUIPC control values which can be found in /modules/fsuipc documents. 

Copy that, I've read and used that document, understand what you are saying. 😃

Many Thanks again my friend.

PS so I need to work backwards, I know the LvAr, so use this to find the ipc.control using Tracer? No, trawl through the FSUIPC document 👍 Got it.. I think

Edited November 10, 20196 yr by Ace9
Add PS.

I'm gettin there, got the function working on 2 buttons first then combine these in to an if statement and Bingo..

I have learnt so much. 👍 many thanks for your guidance and direction Andrew, onwards and upwards. 

function PA28_5K_toggle_push ()
    ipc.writeLvar("Kn62InnerKnobPull", 0)
end
function PA28_5K_toggle_pull ()
    ipc.writeLvar("Kn62InnerKnobPull", 1)
end

Here is the working code.. 😁

function PA28_DME_5k_toggle ()
    Def = "Kn62InnerKnobPull"
    Var = ipc.readLvar(Def)
        if  Var == 0 then
            Var = Var + 1
        else
            Var = Var - 1
        end
    ipc.writeLvar(Def, Var)
end

 

Edited November 10, 20196 yr by Ace9
added working

Hi Andrew, like good old Columbo used to say, "Just one more thing" 🤔

I cannot find much info about developer mode in Linda, is it possible to select an Lvar in Linda tracer, and have it show the ipc.control and any offset. Thus far have not been able to achieve this, am I wasting my time? 

Many Thanks again

The Developer mode and tracer are just tools to help with the hard job of finding out how an aircraft developer may have implemented their creation.   Lvars, offsets and control codes are completely independent of each other. Description for the later 2 can be found in the FSUIPC documents. The Lvars are purely in the developers gift. Most of the time you can surmise what they do from the description. All have to be explored with dogged determination. There are few shortcuts to hard and time consuming graft. 

That's my understanding thus far, its fun to investigate and hit gold every now and again.

Cheers.