Overview

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

The FLEXRAM module intergrates the ITCM, DTCM, and OCRAM controllers, and supports parameterized RAM array and RAM array portioning.

This example code shows how to allocate RAM using the FLEXRAM driver.

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

Enumerations
enum	{ kFLEXRAM_Read = 0U, kFLEXRAM_Write = 1U }
	Flexram write/read selection. More...

enum	{ kFLEXRAM_OCRAMAccessError = FLEXRAM_INT_STATUS_OCRAM_ERR_STATUS_MASK, kFLEXRAM_DTCMAccessError = FLEXRAM_INT_STATUS_DTCM_ERR_STATUS_MASK, kFLEXRAM_ITCMAccessError = FLEXRAM_INT_STATUS_ITCM_ERR_STATUS_MASK, kFLEXRAM_OCRAMMagicAddrMatch = FLEXRAM_INT_STATUS_OCRAM_MAM_STATUS_MASK, kFLEXRAM_DTCMMagicAddrMatch = FLEXRAM_INT_STATUS_DTCM_MAM_STATUS_MASK, kFLEXRAM_ITCMMagicAddrMatch = FLEXRAM_INT_STATUS_ITCM_MAM_STATUS_MASK, kFLEXRAM_InterruptStatusAll }
	Interrupt status flag mask. More...

enum	flexram_tcm_access_mode_t { kFLEXRAM_TCMAccessFastMode = 0U, kFLEXRAM_TCMAccessWaitMode = 1U }
	FLEXRAM TCM access mode. More...

enum	{ kFLEXRAM_TCMSize32KB = 32 * 1024U, kFLEXRAM_TCMSize64KB = 64 * 1024U, kFLEXRAM_TCMSize128KB = 128 * 1024U, kFLEXRAM_TCMSize256KB = 256 * 1024U, kFLEXRAM_TCMSize512KB = 512 * 1024U }
	FLEXRAM TCM support size. More...

Functions
static void	FLEXRAM_SetTCMReadAccessMode (FLEXRAM_Type *base, flexram_tcm_access_mode_t mode)
	FLEXRAM module sets TCM read access mode. More...

static void	FLEXRAM_SetTCMWriteAccessMode (FLEXRAM_Type *base, flexram_tcm_access_mode_t mode)
	FLEXRAM module set TCM write access mode. More...

static void	FLEXRAM_EnableForceRamClockOn (FLEXRAM_Type *base, bool enable)
	FLEXRAM module force ram clock on. More...

static void	FLEXRAM_SetOCRAMMagicAddr (FLEXRAM_Type *base, uint16_t magicAddr, uint32_t rwSel)
	FLEXRAM OCRAM magic addr configuration. More...

static void	FLEXRAM_SetDTCMMagicAddr (FLEXRAM_Type *base, uint16_t magicAddr, uint32_t rwSel)
	FLEXRAM DTCM magic addr configuration. More...

static void	FLEXRAM_SetITCMMagicAddr (FLEXRAM_Type *base, uint16_t magicAddr, uint32_t rwSel)
	FLEXRAM ITCM magic addr configuration. More...

Driver version
#define	FSL_FLEXRAM_DRIVER_VERSION (MAKE_VERSION(2U, 0U, 7U))
	Driver version 2.0.7. More...

Initialization and de-initialization
void	FLEXRAM_Init (FLEXRAM_Type *base)
	FLEXRAM module initialization function. More...

void	FLEXRAN_Deinit (FLEXRAM_Type *base)
	De-initializes the FLEXRAM.

Status
static uint32_t	FLEXRAM_GetInterruptStatus (FLEXRAM_Type *base)
	FLEXRAM module gets interrupt status. More...

static void	FLEXRAM_ClearInterruptStatus (FLEXRAM_Type *base, uint32_t status)
	FLEXRAM module clears interrupt status. More...

static void	FLEXRAM_EnableInterruptStatus (FLEXRAM_Type *base, uint32_t status)
	FLEXRAM module enables interrupt status. More...

static void	FLEXRAM_DisableInterruptStatus (FLEXRAM_Type *base, uint32_t status)
	FLEXRAM module disable interrupt status. More...

Interrupts
static void	FLEXRAM_EnableInterruptSignal (FLEXRAM_Type *base, uint32_t status)
	FLEXRAM module enables interrupt. More...

static void	FLEXRAM_DisableInterruptSignal (FLEXRAM_Type *base, uint32_t status)
	FLEXRAM module disables interrupt. More...

Macro Definition Documentation

#define FSL_FLEXRAM_DRIVER_VERSION (MAKE_VERSION(2U, 0U, 7U))

Enumeration Type Documentation

anonymous enum

Enumerator
kFLEXRAM_Read	read
kFLEXRAM_Write	write

anonymous enum

Enumerator
kFLEXRAM_OCRAMAccessError	OCRAM accesses unallocated address.
kFLEXRAM_DTCMAccessError	DTCM accesses unallocated address.
kFLEXRAM_ITCMAccessError	ITCM accesses unallocated address.
kFLEXRAM_OCRAMMagicAddrMatch	OCRAM magic address match.
kFLEXRAM_DTCMMagicAddrMatch	DTCM magic address match.
kFLEXRAM_ITCMMagicAddrMatch	ITCM magic address match.
kFLEXRAM_InterruptStatusAll	all the interrupt status mask

enum flexram_tcm_access_mode_t

Fast access mode expected to be finished in 1-cycle; Wait access mode expected to be finished in 2-cycle. Wait access mode is a feature of the flexram and it should be used when the CPU clock is too fast to finish TCM access in 1-cycle. Normally, fast mode is the default mode, the efficiency of the TCM access will better.

Enumerator
kFLEXRAM_TCMAccessFastMode	fast access mode
kFLEXRAM_TCMAccessWaitMode	wait access mode

anonymous enum

Enumerator
kFLEXRAM_TCMSize32KB	TCM total size be 32KB.
kFLEXRAM_TCMSize64KB	TCM total size be 64KB.
kFLEXRAM_TCMSize128KB	TCM total size be 128KB.
kFLEXRAM_TCMSize256KB	TCM total size be 256KB.
kFLEXRAM_TCMSize512KB	TCM total size be 512KB.

Function Documentation

void FLEXRAM_Init ( FLEXRAM_Type * base )

Parameters

base	FLEXRAM base address.

static uint32_t FLEXRAM_GetInterruptStatus ( FLEXRAM_Type * base )

inlinestatic

Parameters

base	FLEXRAM base address.

static void FLEXRAM_ClearInterruptStatus	(	FLEXRAM_Type *	base,
		uint32_t	status
	)

inlinestatic

Parameters

base	FLEXRAM base address.
status	Status to be cleared.

static void FLEXRAM_EnableInterruptStatus	(	FLEXRAM_Type *	base,
		uint32_t	status
	)

inlinestatic

Parameters

base	FLEXRAM base address.
status	Status to be enabled.

static void FLEXRAM_DisableInterruptStatus	(	FLEXRAM_Type *	base,
		uint32_t	status
	)

inlinestatic

Parameters

base	FLEXRAM base address.
status	Status to be disabled.

static void FLEXRAM_EnableInterruptSignal	(	FLEXRAM_Type *	base,
		uint32_t	status
	)

inlinestatic

Parameters

base	FLEXRAM base address.
status	Status interrupt to be enabled.

static void FLEXRAM_DisableInterruptSignal	(	FLEXRAM_Type *	base,
		uint32_t	status
	)

inlinestatic

Parameters

base	FLEXRAM base address.
status	Status interrupt to be disabled.

static void FLEXRAM_SetTCMReadAccessMode	(	FLEXRAM_Type *	base,
		flexram_tcm_access_mode_t	mode
	)

inlinestatic

Parameters

base	FLEXRAM base address.
mode	Access mode.

static void FLEXRAM_SetTCMWriteAccessMode	(	FLEXRAM_Type *	base,
		flexram_tcm_access_mode_t	mode
	)

inlinestatic

Parameters

base	FLEXRAM base address.
mode	Access mode.

static void FLEXRAM_EnableForceRamClockOn	(	FLEXRAM_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	FLEXRAM base address.
enable	Enable or disable clock force on.

static void FLEXRAM_SetOCRAMMagicAddr	(	FLEXRAM_Type *	base,
		uint16_t	magicAddr,
		uint32_t	rwSel
	)

inlinestatic

When read/write access hit magic address, it will generate interrupt.

Parameters

base	FLEXRAM base address.
magicAddr	Magic address, the actual address bits [18:3] is corresponding to the register field [16:1].
rwSel	Read/write selection. 0 for read access while 1 for write access.

static void FLEXRAM_SetDTCMMagicAddr	(	FLEXRAM_Type *	base,
		uint16_t	magicAddr,
		uint32_t	rwSel
	)

inlinestatic

When read/write access hits magic address, it will generate interrupt.

Parameters

base	FLEXRAM base address.
magicAddr	Magic address, the actual address bits [18:3] is corresponding to the register field [16:1].
rwSel	Read/write selection. 0 for read access while 1 write access.

static void FLEXRAM_SetITCMMagicAddr	(	FLEXRAM_Type *	base,
		uint16_t	magicAddr,
		uint32_t	rwSel
	)

inlinestatic

When read/write access hits magic address, it will generate interrupt.

Parameters

base	FLEXRAM base address.
magicAddr	Magic address, the actual address bits [18:3] is corresponding to the register field [16:1].
rwSel	Read/write selection. 0 for read access while 1 for write access.

Overview

Enumerations

Functions

Driver version

Initialization and de-initialization

Status

Interrupts

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation