SinWaveGen is a synchronised sinewave generator that takes a square input on an Arduino Uno, Nano, etc digital pin and outputs a loosely synchronised sinusoid wave as opposite polarity PWM signals on pins 5 (+ve) & 6 (-ve). It's designed to be compatible with pedalShield Uno for example. (Pin changes necessary for that, mind.)
It's intended to test the timings and reliability when generating a sychronised sinewave at frequencies equal to the first 2 octaves of a bass guitar and whether it's feasable as a tone generator for "top secret" guitar pedal. It would probably be used in conjunction with an analog VCA and Attack/Decay circuit as I'm not sure at this stage if an AT328p has the bandwidth to do that digitally, without writing the sketch entirely in assembly code. I'm pretty sure that option is beyond me at this stage.
(<thinks> Hmm, it probably is doable, really. What
have I to lose trying? NOTHING!)
My aim is to create this in pure C/C++ code, in order to make it compatible with almost any microcontroller.
ToDos:
- Turn off output when input timing is null,
- Create proper C++ class with header and source,
- Create wave tables and formulae for several different waveforms.
The project here is setup for development in PlatformIO, to
use with ArdinoIDE, download the "src" directory, change
the name of the SinWaveGen.cpp file to SinWaveGen.ino, add
Thomas Fredericks' Chrono library to ArduinoIDE, comment
out (or delete) the very first line of SinWaveGen.ino,
eg // #include Arduino.h and you're good to build.
©2023 Crunchysteve bandmassa@gmail.com Modified MIT licence, commercial developers should negotiate a paid licence with the above author.