New method settings provides dynamic SPI speed support

[Makuna]

NeoPixelBus now exposes a new method void SetMethodSettings(const SettingsObject& settings) that allows setting properties exposed for specific "Methods". Currently only the hardware SPI for Two Wire methods use this.

This allows for the dynamic setting of the SPI speed on the NeoPixelBus when using one of these specific methods:

• DotStarSpiHzMethod
• NeoWs2801SpiHzMethod
• P9813SpiHzMethod
• Lpd6803SpiHzMethod
• Lpd8806SpiHzMethod

You would instance your two wire strip like...

NeoPixelBus<DotStarBgrFeature, DotStarSpiHzMethod> strip(PixelCount);

And then you can set the speed like...

strip.SetMethodSettings(NeoSpiSettings(900000)); // custom 900Khz clock speed