DMAMUX: Direct Memory Access Multiplexer Driver

Overview

The MCUXpresso SDK provides a peripheral driver for the Direct Memory Access Multiplexer (DMAMUX) of MCUXpresso SDK devices.

Typical use case

DMAMUX Operation

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/dmamux

Driver version
#define	FSL_DMAMUX_DRIVER_VERSION   (MAKE_VERSION(2, 0, 4))
	DMAMUX driver version 2.0.4. More...

DMAMUX Initialization and de-initialization
void	DMAMUX_Init (DMAMUX_Type *base)
	Initializes the DMAMUX peripheral. More...
void	DMAMUX_Deinit (DMAMUX_Type *base)
	Deinitializes the DMAMUX peripheral. More...

DMAMUX Channel Operation
static void	DMAMUX_EnableChannel (DMAMUX_Type *base, uint32_t channel)
	Enables the DMAMUX channel. More...
static void	DMAMUX_DisableChannel (DMAMUX_Type *base, uint32_t channel)
	Disables the DMAMUX channel. More...
static void	DMAMUX_SetSource (DMAMUX_Type *base, uint32_t channel, uint32_t source)
	Configures the DMAMUX channel source. More...
static void	DMAMUX_EnablePeriodTrigger (DMAMUX_Type *base, uint32_t channel)
	Enables the DMAMUX period trigger. More...
static void	DMAMUX_DisablePeriodTrigger (DMAMUX_Type *base, uint32_t channel)
	Disables the DMAMUX period trigger. More...
static void	DMAMUX_EnableAlwaysOn (DMAMUX_Type *base, uint32_t channel, bool enable)
	Enables the DMA channel to be always ON. More...

Macro Definition Documentation

#define FSL_DMAMUX_DRIVER_VERSION   (MAKE_VERSION(2, 0, 4))

Function Documentation

void DMAMUX_Init

(

DMAMUX_Type *

base

)

This function ungates the DMAMUX clock.

Parameters

base	DMAMUX peripheral base address.

void DMAMUX_Deinit

(

DMAMUX_Type *

base

)

This function gates the DMAMUX clock.

Parameters

base	DMAMUX peripheral base address.

static void DMAMUX_EnableChannel ( DMAMUX_Type *  base, uint32_t  channel  )

inlinestatic

This function enables the DMAMUX channel.

Parameters

base	DMAMUX peripheral base address.
channel	DMAMUX channel number.

static void DMAMUX_DisableChannel ( DMAMUX_Type *  base, uint32_t  channel  )

inlinestatic

This function disables the DMAMUX channel.

Note

The user must disable the DMAMUX channel before configuring it.

Parameters

base	DMAMUX peripheral base address.
channel	DMAMUX channel number.

static void DMAMUX_SetSource ( DMAMUX_Type *  base, uint32_t  channel, uint32_t  source  )

inlinestatic

Parameters

base	DMAMUX peripheral base address.
channel	DMAMUX channel number.
source	Channel source, which is used to trigger the DMA transfer.

static void DMAMUX_EnablePeriodTrigger ( DMAMUX_Type *  base, uint32_t  channel  )

inlinestatic

This function enables the DMAMUX period trigger feature.

Parameters

base	DMAMUX peripheral base address.
channel	DMAMUX channel number.

static void DMAMUX_DisablePeriodTrigger ( DMAMUX_Type *  base, uint32_t  channel  )

inlinestatic

This function disables the DMAMUX period trigger.

Parameters

base	DMAMUX peripheral base address.
channel	DMAMUX channel number.

static void DMAMUX_EnableAlwaysOn ( DMAMUX_Type *  base, uint32_t  channel, bool  enable  )

inlinestatic

This function enables the DMAMUX channel always ON feature.

Parameters

base	DMAMUX peripheral base address.
channel	DMAMUX channel number.
enable	Switcher of the always ON feature. "true" means enabled, "false" means disabled.