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f5fd5912fe
* Allow specifying waveform generator in source code
Allows code to explicitly specify which waveform generator it wants,
without needing to use one of the 100 IDE menus or adding a `-D`
compile-time define.
Uses weakrefs to allow for apps to call `enablePhaseLockedWaveform();`
within their `setup()` (or anywhere, really) and have the phase locked
versions override the default waveform generators automatically.
For example:
````
void setup() {
// Uncomment following line to use phase-locked waveform generator
// enablePhaseLockedWaveform();
Serial.begin(115200);
pinMode(LED_BUILTIN, OUTPUT); // Initialize the LED_BUILTIN pin as an output
analogWriteRange(1000);
}
void loop() {
analogWrite(LED_BUILTIN, 100);
delay(1000); // Wait for a second
analogWrite(LED_BUILTIN, 900);
delay(2000); // Wait for two seconds (to demonstrate the active low LED)
}
````
Also adds an example showing it's use.
Address @dok-net's comments and also remove the _weak/_bound version of
startWaveform() since it's invariant of the actual waveform generator.