Hello,
I am trying to modify the original K6BEZ antenna analyzer and replace the Windows app with the Arduino TFT display.
For the inquisitives here are the details: NameBright - Coming Soon
To wrap it up, the start end end frequency are declared to Arduino, which controls an AD9850 DDS that sends RF to an electronic circuit connected to the antenna. Each step of the sweep involves measuring the voltage at A0 and A1 and based on those readings, the Windows app draws a graph.
I am relatively new to programming (and electronics too :-[ ) but I'd like a few guidelines to port the graph to the Arduino TFT.
More exactly, I'd like to be able to use the readings of A0 and A1 of each step to draw a dot on the TFT but the most important thing is to be able to evaluate all the values returned by each step of the sweep, determine the minimum value and draw a vertical line in that point, for those of you who know a thing or two about ham radio, I'd like to know the frequency of the minimal SWR point and have it highlighted on the graph. But to do that I would need to be able to compare all of the readings.
Thank you.