This is code for single-port network analyzer (SPNA) using an Arduino Mega, graphical display shield, AD9850 DDS signal generator, Mini-Circuits PDC-20-3BD directional coupler, and AD8302 RF gain phase detector.

http://pages.cs.wisc.edu/~timc/e/spna/

There are two different versions -- v3 and v4.

v3 uses UTFT and UTouch -- which is problematic as the touch function with this display is problematic at best.

v4 uses https://github.com/neu-rah/ArduinoMenu.git

v3 uses the following libraries:

UTFT: http://www.rinkydinkelectronics.com/library.php?id=51

various fonts: http://www.rinkydinkelectronics.com/r_fonts.php

URTouch: http://www.rinkydinkelectronics.com/library.php?id=92

UTFT_Buttons: http://www.rinkydinkelectronics.com/library.php?id=61

DDS: https://github.com/m0xpd/DDS

Tue Jan 2 23:33:32 CST 2018

Picking up project after a long hiatus. Lots of cleanup as the compiler gets pickier. Now have a mouse cursor on the screen, need to action that to find screen color select/replace/update cycle and actually 'click' a button.