PDMCC26XX Parameters are used to with the PDMCC26XX_open() call. Default values for these parameters are set using PDMCC26XX_Params_init(). More...

#include <PDMCC26XX.h>

Data Fields
bool	useDefaultFilter

bool	micPowerActiveHigh

bool	applyCompression

uint8_t	pdmBufferQueueDepth

uint16_t	retBufSizeInBytes

int32_t *	decimationFilter

uint32_t	startupDelayWithClockInSamples

PDMCC26XX_CallbackFxn	callbackFxn

PDMCC26XX_Gain	micGain

PDMCC26XX_MallocFxn	mallocFxn

PDMCC26XX_FreeFxn	freeFxn

uintptr_t	custom

Detailed Description

PDMCC26XX Parameters are used to with the PDMCC26XX_open() call. Default values for these parameters are set using PDMCC26XX_Params_init().

See also: PDMCC26XX_Params_init

Field Documentation

§ useDefaultFilter

bool PDMCC26XX_Params::useDefaultFilter

Set to TRUE to apply default filter. Set to FALSE to apply PDMCC26XX_Params::decimationFilter.

§ micPowerActiveHigh

bool PDMCC26XX_Params::micPowerActiveHigh

Set to TRUE if setting the GPIO high powers the microphone

§ applyCompression

bool PDMCC26XX_Params::applyCompression

Set to TRUE to apply compression. Setting it to FALSE allows user to apply own compression scheme.

§ pdmBufferQueueDepth

uint8_t PDMCC26XX_Params::pdmBufferQueueDepth

§ retBufSizeInBytes

uint16_t PDMCC26XX_Params::retBufSizeInBytes

PDM buffer queue depth in number of blocks. We assume that we will be able to consume approximately one buffer per 2ms. This allows us to use the minium number of blocks (3) for the PDMCC26XX driver. If the application can not service the PDM task within the 2ms time window, increase this value to permit more latency in processing incoming PDM data at the cost of increased RAM useage.Size of returned buffers. It is not reccomended to make this value less than 64, the driver will not crash, but the equence numbers may become unaligned with the data in the buffer.

§ decimationFilter

int32_t* PDMCC26XX_Params::decimationFilter

Filter that is applied if PDMCC26XX_Params::useDefaultFilter is set to FALSE

§ startupDelayWithClockInSamples

uint32_t PDMCC26XX_Params::startupDelayWithClockInSamples

Some digital microphones have a startup delay. Set the number of samples to discard after powering the microphone starting to clock in data.

§ callbackFxn

PDMCC26XX_CallbackFxn PDMCC26XX_Params::callbackFxn

Callback function pointer

§ micGain

PDMCC26XX_Gain PDMCC26XX_Params::micGain

Microphone gain

§ mallocFxn

PDMCC26XX_MallocFxn PDMCC26XX_Params::mallocFxn

Malloc function pointer

§ freeFxn

PDMCC26XX_FreeFxn PDMCC26XX_Params::freeFxn

Free function pointer

§ custom

uintptr_t PDMCC26XX_Params::custom

Custom argument used by driver implementation

The documentation for this struct was generated from the following file:

PDMCC26XX.h

Data Fields