Pico modules

These modules are to be used with rp2040 based boards, such as Raspberry Pi pico. More...

These modules are to be used with rp2040 based boards, such as Raspberry Pi pico.

Modules
	pico_audio
	Common API for audio output.
	pico_audio_pwm
	PWM audio output (with optional noise shaping and error diffusion) using the PIO.
	fraise
	Common Fraise API.
	fraise_eeprom
	EEPROM emulation in flash memory.
	smooth_pwm
	Demo module, implementing smoothed configurable PWM channels.
	fraise_stdout
	Setup Fraise output as a regular stdout.
	ws2812
	ws2812 (aka pixel led) module.