DPR: Display Prefetch Resolve

Overview

The MCUXpresso SDK provides a peripheral driver for the DPR module of MCUXpresso SDK devices.

The DPR works with Prefetch Resolve Gasket (PRG) to prefetch the frame buffer data for display controller.

Data Structures
struct	dpr_buffer_config_t
	Frame buffer configuration. More...

Macros
#define	FSL_DPR_DRIVER_VERSION   (MAKE_VERSION(2, 0, 1))
	Driver version. More...

Enumerations
enum	dpr_data_type_t {   kDPR_DataType16Bpp = 1U,   kDPR_DataType32Bpp = 2U }
	Data type of the frame buffer. More...

Functions
void	DPR_Init (DPR_Type *base)
	Enables and configures the DPR peripheral module. More...
void	DPR_Deinit (DPR_Type *base)
	Disables the DPR peripheral module. More...
void	DPR_SetBufferConfig (DPR_Type *base, const dpr_buffer_config_t *config)
	Set the input frame buffer configuration. More...
void	DPR_BufferGetDefaultConfig (dpr_buffer_config_t *config)
	Get the input frame buffer default configuration. More...
static void	DPR_Start (DPR_Type *base)
	Starts the DPR. More...
static void	DPR_StartRepeat (DPR_Type *base)
	Starts the DPR to run repeatly. More...
static void	DPR_Stop (DPR_Type *base)
	Stops the DPR. More...
static void	DPR_SetBufferAddr (DPR_Type *base, uint32_t addr)
	Set the frame buffer address. More...

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Data Structure Documentation

struct dpr_buffer_config_t

Data Fields
uint16_t	width
	Frame buffer width, how many pixels per line. More...
uint16_t	height
	Frame buffer height. More...
uint16_t	strideBytes
	Stride in bytes. More...
dpr_data_type_t	dataType
	Data type. More...

Field Documentation

uint16_t dpr_buffer_config_t::width

uint16_t dpr_buffer_config_t::height

uint16_t dpr_buffer_config_t::strideBytes

dpr_data_type_t dpr_buffer_config_t::dataType

Macro Definition Documentation

#define FSL_DPR_DRIVER_VERSION   (MAKE_VERSION(2, 0, 1))

Enumeration Type Documentation

enum dpr_data_type_t

Enumerator
kDPR_DataType16Bpp	16 bits per pixel.
kDPR_DataType32Bpp	32 bits per pixel.

Function Documentation

void DPR_Init

(

DPR_Type *

base

)

Parameters

base	DPR peripheral address.

void DPR_Deinit

(

DPR_Type *

base

)

Parameters

base	DPR peripheral address.

void DPR_SetBufferConfig	(	DPR_Type *	base,
		const dpr_buffer_config_t *	config
	)

Parameters

base	DPR peripheral address.
config	Pointer to the configuration.

void DPR_BufferGetDefaultConfig

(

dpr_buffer_config_t *

config

)

The default configuration is

config->width = 1080U;
config->height = 1920U;
config->strideBytes = 4U * 1080U;
config->dataType = kDPR_DataType32Bpp;

Parameters

config

Pointer to the configuration.

static void DPR_Start ( DPR_Type *  base )

inlinestatic

This function trigers the DPR to load the new configuration and start processing the next frame. It should be called before display started.

Parameters

base	DPR peripheral address.

static void DPR_StartRepeat ( DPR_Type *  base )

inlinestatic

This function should be called after display started. The display signal trigers the new configuration loading repeatly.

Parameters

base	DPR peripheral address.

static void DPR_Stop ( DPR_Type *  base )

inlinestatic

Parameters

base	DPR peripheral address.

static void DPR_SetBufferAddr ( DPR_Type *  base, uint32_t  addr  )

inlinestatic

Parameters

base	DPR peripheral address.
addr	Frame buffer address.