Added DDS datasheets
Add small delay into the reset code, as per AD9850 data sheet; move settle_delay delay into the set frequency routine.
Add a basic 'oscilloscope mode' to show the detector voltages, as I suspect noise. (Confirmed existence of some digital noise with my old scope). Need to fix in hardware, or perhaps take mode of some voltage readings?
Extract analogRead to its own function so I can return the mode of a few values; knock out fade, as the noise I'm seeing seems to be exacerbated by it.
Merge branch 'master' of https://github.com/devzendo/antenna-analyser
Add ATmega16U4/32U4 data sheet and summary - the Arduino Micro
Investigating noise: remove fading / flashing LED effects, first cut of an analog read using the mode of several measurements,
Set the DDS frequency several times as it doesn't always set reliably first time.
A better oscilloscope mode.
Return the VSWR as a double, as suggested by Simon Kennedy G0FCU. (Need to check that this does not adversely affect the protocol, to keep compatibility with Beric's original)