Arduino FlightGear Cockpit (AFGcockpit)
Page last changed: March 2011
- 1. Contents
- 2. What is it?
- 3. Why
- 4. Features
- 5. Communicating With FG
- 6. PCB Layout
- 7. Source Code
- 8. Pictures
- 9. Version History
- 10. Links (to related information)
What is it?
This is a project which uses the Arduino Duemilanove to control an aeroplane (Cessna) in the Flightgear flightsimulator (FG). The communication between Flightgear and Arduino is with the serial cable (USB). A future plan is to display different data using voltmeters as well, however far away in future in case I don't get bored before that.
AFGcockpit stands for Arduino FlightGear cockpit.
Please feel free to contact me if you have any questions or are interested about this.
- I want to learn electronics, especially with Arduino in mind.
- Since it is open source, everything is possible. Since it is possible, I want to do it!
- I like the FG simulator, and this would be a fun project!
The current features are:
- Two 4051 muxers connected in parallell (only uses 3 pins to control, 2 analog ins). Can now read input from up to 16 different sources (this can be expanded to 6 muxers, ie 48 controls, on the Duemilanove).
- Aileron, rudder, elevator, elevator trim controlled by rotary pots
- Throttle and flaps (value is converted to 4 discrete steps; 0, 0.3, 0.6, 1) controlled by fader pots
- Breaks (parking, left, right) are controlled with buttons connected to second muxer. Values converted to bools.
- LEDs and 7 segment displays controlled by 74HC595 shift registers (require 3 pins). Current uses:
- Parking brake LED
- Sync LED (lits when FG and Arduino are not in sync)
- Two 7 segment displays showing the air temp (!)
- ...but can be expanded easily to show more important stuff or build a digital autopilot or comm radio!
- LCD to show different values read from FG. This is mainly for debug and is planned to be removed.
- Switch to enable/disable sending data to FG, in case you want to use mouse, autopilot etc.
- 20 different data read from FG over serial port (ascii format).
- Main loop runs at around 300 times per second if FG send data at 2 Hz and Arduino send at (if necessary maximum) 10 Hz.
Communicating With FG
The communication with FG is carried out over the USB serial port cable. A generic protocol is created, actually two at the moment. One is used for sending and the other for recieving.
FG is started with the following commands:
This will cause FG to read data from the serial port at 10 Hz and send data at 2 Hz at the baud rate of 38400.
Download the protocols:
and place in the protocols folder of FG, ie. $FG_ROOT/Protocol.
I don't have this, but I have an SVG sketch showing how everything is connected at the moment.
Yes, the wiring is messy!
Previous versions on a separate page.
Links (to related information)
fg-arduino is a related project.