Hello,
I am really interested in this project as it is exactly within my scope of expertise. Could you send the command guide of the function generator and interfacing details? Which TFT shield you are using ? Have weblink? I have ArduinoMega and 3.2 inch LCD with touch (iteadstudio). And I have done few project around it.
Please do not hesitate to write back if you consider.
Thank you, Sam