Functions
void	initMic (gpio_num_t gpio)
	Initialize the ADC which continuously samples the microphone.

void	deinitMic (void)
	Deinitialize the ADC which continuously samples the microphone.

void	powerDownMic (void)
	Power down the ADC (microphone)

void	powerUpMic (void)
	Power up the ADC (microphone)

void	startMic (void)
	Start sampling the microphone's ADC.

uint32_t	loopMic (uint16_t *outSamples, uint32_t outSamplesMax)
	Attempt to read a block of 12-bit samples from the ADC in continuous mode. This may return fewer than expected samples (or zero samples) if the task rate is faster than the sampling rate.

void	stopMic (void)
	Stop sampling the microphone's ADC.

Function Documentation

◆ initMic()

void initMic ( gpio_num_t gpio )

Initialize the ADC which continuously samples the microphone.

This does not start sampling, so startMic() must be called afterwards.

Parameters

gpio	The GPIO the microphone is attached to

◆ deinitMic()

void deinitMic ( void )

Deinitialize the ADC which continuously samples the microphone.

◆ powerDownMic()

void powerDownMic ( void )

Power down the ADC (microphone)

◆ powerUpMic()

void powerUpMic ( void )

Power up the ADC (microphone)

◆ startMic()

void startMic ( void )

Start sampling the microphone's ADC.

◆ loopMic()

uint32_t loopMic	(	uint16_t *	outSamples,
		uint32_t	outSamplesMax )

Attempt to read a block of 12-bit samples from the ADC in continuous mode. This may return fewer than expected samples (or zero samples) if the task rate is faster than the sampling rate.

Parameters

[out]	outSamples	A pointer to write 12-bit samples from the ADC
[in]	outSamplesMax	The maximum number of samples that can be written to outSamples

Returns: The number of samples which were actually written to outSamples

◆ stopMic()

void stopMic ( void )

Stop sampling the microphone's ADC.

Functions