[simpits-tech] Image warping (Was: Frustration!)

[dabigboy at cox.net]

---- Cris Harrison <phoenixcomm at gmail.com> wrote: 
> >>
> > Hey Matt hang on there.. I just posted a new post about ARINC 410 and 
> > some proto info.. lots of info
> > http://phoenixcomm.wordpress.com/2012/02/21/arinc-410interface/

Thanks Chris, you have some good info there! Your chart looks really close to the JPG that Gables sent me.

> BTW how in the world are you going to use a joystick controler???
> Cris H.

Well, call it a cave-man approach, but since I don't have an Arduino or similar unit yet, and since my microcontroller skills are most definitely in their infancy to say the least.....I am wiring the 8 inputs for the decimal place on NAV to 8 inputs on my Plasma V2 controller, with the Gables common lead going to VCC on the Plasma. With software, I simply check the status of each input, in order, and end up wiith essentially an 8-bit string that is unique for each frequency. I already have this part working within X-Plane.

For the whole numbers, there are only 10 unique values, and the head uses a resistor pack. Two leads get different resistance values based on frequency. I was just going to wire this into one analog input and read its value to determine frequency. The problem I'm having right now is detailed in my other post....basically, the Plasma needs to see the ground terminal of the "potentiometer" in order to read it. Of course, there really is no ground terminal for the resistor pack...I think?

At the end of the day I will be using 8 digital inputs plus one analog input for this and similar heads. I suppose that's really no worse than using 8 + 1 inputs of an Arduino, the only difference is the (extremely light) processing would happen on the Arduino instead of inside an X-Plane plugin on the PC. At any rate, the code is ludicrously simple this way.

Matt