pico_audio_pwm

PWM audio output (with optional noise shaping and error diffusion) using the PIO. More...

PWM audio output (with optional noise shaping and error diffusion) using the PIO.

This library uses the hardware_pio system to implement a PWM audio interface

Functions
const audio_format_t *	audio_pwm_setup (const audio_format_t *intended_audio_format, int32_t max_latency_ms, const audio_pwm_channel_config_t *channel_config0,...)
bool	audio_pwm_default_connect (audio_buffer_pool_t *producer_pool, bool dedicate_core_1)
void	audio_pwm_set_enabled (bool enabled)
bool	audio_pwm_set_correction_mode (enum audio_correction_mode mode)
	Set the PWM correction mode. More...
enum audio_correction_mode	audio_pwm_get_correction_mode ()
	Get the PWM correction mode. More...

Function Documentation

audio_pwm_setup()

const audio_format_t* audio_pwm_setup	(	const audio_format_t *	intended_audio_format,
		int32_t	max_latency_ms,
		const audio_pwm_channel_config_t *	channel_config0,
			...
	)

max_latency_ms may be -1 (for don't care)

Parameters

intended_audio_format
max_latency_ms
channel_config0
...

Returns

audio_pwm_default_connect()

bool audio_pwm_default_connect	(	audio_buffer_pool_t *	producer_pool,
		bool	dedicate_core_1
	)

Parameters

producer_pool
dedicate_core_1	attempt a default mapping of producer buffers to pio pwm pico_audio output dedicate_core_1 to have core 1 set aside entirely to do work offloading as much stuff from the producer side as possible todo also allow IRQ handler to do it I guess

audio_pwm_set_enabled()

void audio_pwm_set_enabled

(

bool

enabled

)

Parameters

enable

true to enable the PWM audio, false to disable

audio_pwm_set_correction_mode()

bool audio_pwm_set_correction_mode

(

enum audio_correction_mode

mode

)

Set the PWM correction mode.

Parameters

mode

audio_pwm_get_correction_mode()

enum audio_correction_mode audio_pwm_get_correction_mode

(

)

Get the PWM correction mode.

Returns

mode