Overview

The MCUXpresso SDK provides a peripheral driver for the Flexible Serial Peripheral Interface (FLEXSPI) module of MCUXpresso SDK/i.MX devices.

FLEXSPI driver includes functional APIs and interrupt/EDMA non-blocking transactional APIs.

Functional APIs are feature/property target low level APIs. Functional APIs can be used for FLEXSPI initialization/configuration/operation for optimization/customization purpose. Using the functional API requires the knowledge of the FLEXSPI peripheral and how to organize functional APIs to meet the application requirements. All functional API use the peripheral base address as the first parameter. FLEXSPI functional operation groups provide the functional API set.

Transactional APIs are transaction target high level APIs. Transactional APIs can be used to enable the peripheral and in the application if the code size and performance of transactional APIs satisfy the requirements. If the code size and performance are a critical requirement, see the transactional API implementation and write a custom code. All transactional APIs use the flexspi_handle_t/flexspi_edma_handle_t as the second parameter. Initialize the handle for interrupt non-blocking transfer by calling the FLEXSPI_TransferCreateHandle API. Initialize the handle for interrupt non-blocking transfer by calling the FLEXSPI_TransferCreateHandleEDMA API.

Transactional APIs support asynchronous transfer. This means that the functions FLEXSPI_TransferNonBlocking() and FLEXSPI_TransferEDMA() set up data transfer. When the transfer completes, the upper layer is notified through a callback function with the kStatus_FLEXSPI_Idle status.

Modules
	FLEXSPI eDMA Driver

Data Structures
struct	flexspi_config_t
	FLEXSPI configuration structure. More...

struct	flexspi_device_config_t
	External device configuration items. More...

struct	flexspi_transfer_t
	Transfer structure for FLEXSPI. More...

struct	flexspi_handle_t
	Transfer handle structure for FLEXSPI. More...

Macros
#define	FLEXSPI_LUT_SEQ(cmd0, pad0, op0, cmd1, pad1, op1)
	Formula to form FLEXSPI instructions in LUT table. More...

Typedefs
typedef void(*	flexspi_transfer_callback_t )(FLEXSPI_Type base, flexspi_handle_t handle, status_t status, void *userData)
	FLEXSPI transfer callback function. More...

Enumerations
enum	_flexspi_status { kStatus_FLEXSPI_Busy = MAKE_STATUS(kStatusGroup_FLEXSPI, 0), kStatus_FLEXSPI_SequenceExecutionTimeout = MAKE_STATUS(kStatusGroup_FLEXSPI, 1), kStatus_FLEXSPI_IpCommandSequenceError = MAKE_STATUS(kStatusGroup_FLEXSPI, 2), kStatus_FLEXSPI_IpCommandGrantTimeout = MAKE_STATUS(kStatusGroup_FLEXSPI, 3) }
	Status structure of FLEXSPI. More...

enum	_flexspi_command { kFLEXSPI_Command_STOP = 0x00U, kFLEXSPI_Command_SDR = 0x01U, kFLEXSPI_Command_RADDR_SDR = 0x02U, kFLEXSPI_Command_CADDR_SDR = 0x03U, kFLEXSPI_Command_MODE1_SDR = 0x04U, kFLEXSPI_Command_MODE2_SDR = 0x05U, kFLEXSPI_Command_MODE4_SDR = 0x06U, kFLEXSPI_Command_MODE8_SDR = 0x07U, kFLEXSPI_Command_WRITE_SDR = 0x08U, kFLEXSPI_Command_READ_SDR = 0x09U, kFLEXSPI_Command_LEARN_SDR = 0x0AU, kFLEXSPI_Command_DATSZ_SDR = 0x0BU, kFLEXSPI_Command_DUMMY_SDR = 0x0CU, kFLEXSPI_Command_DUMMY_RWDS_SDR = 0x0DU, kFLEXSPI_Command_DDR = 0x21U, kFLEXSPI_Command_RADDR_DDR = 0x22U, kFLEXSPI_Command_CADDR_DDR = 0x23U, kFLEXSPI_Command_MODE1_DDR = 0x24U, kFLEXSPI_Command_MODE2_DDR = 0x25U, kFLEXSPI_Command_MODE4_DDR = 0x26U, kFLEXSPI_Command_MODE8_DDR = 0x27U, kFLEXSPI_Command_WRITE_DDR = 0x28U, kFLEXSPI_Command_READ_DDR = 0x29U, kFLEXSPI_Command_LEARN_DDR = 0x2AU, kFLEXSPI_Command_DATSZ_DDR = 0x2BU, kFLEXSPI_Command_DUMMY_DDR = 0x2CU, kFLEXSPI_Command_DUMMY_RWDS_DDR = 0x2DU, kFLEXSPI_Command_JUMP_ON_CS = 0x1FU }
	CMD definition of FLEXSPI, use to form LUT instruction. More...

enum	_flexspi_pad { kFLEXSPI_1PAD = 0x00U, kFLEXSPI_2PAD = 0x01U, kFLEXSPI_4PAD = 0x02U, kFLEXSPI_8PAD = 0x03U }
	pad definition of FLEXSPI, use to form LUT instruction. More...

enum	flexspi_flags_t { kFLEXSPI_SequenceExecutionTimeoutFlag = FLEXSPI_INTEN_SEQTIMEOUTEN_MASK, kFLEXSPI_AhbBusTimeoutFlag = FLEXSPI_INTEN_AHBBUSTIMEOUTEN_MASK, kFLEXSPI_SckStoppedBecauseTxEmptyFlag, kFLEXSPI_SckStoppedBecauseRxFullFlag, kFLEXSPI_IpTxFifoWatermarkEmpltyFlag = FLEXSPI_INTEN_IPTXWEEN_MASK, kFLEXSPI_IpRxFifoWatermarkAvailableFlag = FLEXSPI_INTEN_IPRXWAEN_MASK, kFLEXSPI_AhbCommandSequenceErrorFlag, kFLEXSPI_IpCommandSequenceErrorFlag = FLEXSPI_INTEN_IPCMDERREN_MASK, kFLEXSPI_AhbCommandGrantTimeoutFlag, kFLEXSPI_IpCommandGrantTimeoutFlag, kFLEXSPI_IpCommandExcutionDoneFlag, kFLEXSPI_AllInterruptFlags = 0xFFFU }
	FLEXSPI interrupt status flags. More...

enum	flexspi_read_sample_clock_t { kFLEXSPI_ReadSampleClkLoopbackInternally = 0x0U, kFLEXSPI_ReadSampleClkLoopbackFromDqsPad = 0x1U, kFLEXSPI_ReadSampleClkLoopbackFromSckPad = 0x2U, kFLEXSPI_ReadSampleClkExternalInputFromDqsPad = 0x3U }
	FLEXSPI sample clock source selection for Flash Reading. More...

enum	flexspi_cs_interval_cycle_unit_t { kFLEXSPI_CsIntervalUnit1SckCycle = 0x0U, kFLEXSPI_CsIntervalUnit256SckCycle = 0x1U }
	FLEXSPI interval unit for flash device select. More...

enum	flexspi_ahb_write_wait_unit_t { kFLEXSPI_AhbWriteWaitUnit2AhbCycle = 0x0U, kFLEXSPI_AhbWriteWaitUnit8AhbCycle = 0x1U, kFLEXSPI_AhbWriteWaitUnit32AhbCycle = 0x2U, kFLEXSPI_AhbWriteWaitUnit128AhbCycle = 0x3U, kFLEXSPI_AhbWriteWaitUnit512AhbCycle = 0x4U, kFLEXSPI_AhbWriteWaitUnit2048AhbCycle = 0x5U, kFLEXSPI_AhbWriteWaitUnit8192AhbCycle = 0x6U, kFLEXSPI_AhbWriteWaitUnit32768AhbCycle = 0x7U }
	FLEXSPI AHB wait interval unit for writting. More...

enum	flexspi_ip_error_code_t { kFLEXSPI_IpCmdErrorNoError = 0x0U, kFLEXSPI_IpCmdErrorJumpOnCsInIpCmd = 0x2U, kFLEXSPI_IpCmdErrorUnknownOpCode = 0x3U, kFLEXSPI_IpCmdErrorSdrDummyInDdrSequence = 0x4U, kFLEXSPI_IpCmdErrorDdrDummyInSdrSequence = 0x5U, kFLEXSPI_IpCmdErrorInvalidAddress = 0x6U, kFLEXSPI_IpCmdErrorSequenceExecutionTimeout = 0xEU, kFLEXSPI_IpCmdErrorFlashBoundaryAcrosss = 0xFU }
	Error Code when IP command Error detected. More...

enum	flexspi_ahb_error_code_t { kFLEXSPI_AhbCmdErrorNoError = 0x0U, kFLEXSPI_AhbCmdErrorJumpOnCsInWriteCmd = 0x2U, kFLEXSPI_AhbCmdErrorUnknownOpCode = 0x3U, kFLEXSPI_AhbCmdErrorSdrDummyInDdrSequence = 0x4U, kFLEXSPI_AhbCmdErrorDdrDummyInSdrSequence = 0x5U, kFLEXSPI_AhbCmdSequenceExecutionTimeout = 0x6U }
	Error Code when AHB command Error detected. More...

enum	flexspi_port_t { kFLEXSPI_PortA1 = 0x0U, kFLEXSPI_PortA2 = 0x1U, kFLEXSPI_PortB1 = 0x2U, kFLEXSPI_PortB2 = 0x3U }
	FLEXSPI operation port select. More...

enum	flexspi_arb_command_source_t
	Trigger source of current command sequence granted by arbitrator. More...

enum	flexspi_command_type_t { kFLEXSPI_Command, kFLEXSPI_Config }

Driver version
#define	FSL_FLEXSPI_DRIVER_VERSION (MAKE_VERSION(2, 0, 1))
	FLEXSPI driver version 2.0.1. More...

Initialization and deinitialization
void	FLEXSPI_Init (FLEXSPI_Type base, const flexspi_config_t config)
	Initializes the FLEXSPI module and internal state. More...

void	FLEXSPI_GetDefaultConfig (flexspi_config_t *config)
	Gets default settings for FLEXSPI. More...

void	FLEXSPI_Deinit (FLEXSPI_Type *base)
	Deinitializes the FLEXSPI module. More...

void	FLEXSPI_SetFlashConfig (FLEXSPI_Type base, flexspi_device_config_t config, flexspi_port_t port)
	Configures the connected device parameter. More...

static void	FLEXSPI_SoftwareReset (FLEXSPI_Type *base)
	Software reset for the FLEXSPI logic. More...

static void	FLEXSPI_Enable (FLEXSPI_Type *base, bool enable)
	Enables or disables the FLEXSPI module. More...

Interrupts
static void	FLEXSPI_EnableInterrupts (FLEXSPI_Type *base, uint32_t mask)
	Enables the FLEXSPI interrupts. More...

static void	FLEXSPI_DisableInterrupts (FLEXSPI_Type *base, uint32_t mask)
	Disable the FLEXSPI interrupts. More...

DMA control
static void	FLEXSPI_EnableTxDMA (FLEXSPI_Type *base, bool enable)
	Enables or disables FLEXSPI IP Tx FIFO DMA requests. More...

static void	FLEXSPI_EnableRxDMA (FLEXSPI_Type *base, bool enable)
	Enables or disables FLEXSPI IP Rx FIFO DMA requests. More...

static uint32_t	FLEXSPI_GetTxFifoAddress (FLEXSPI_Type *base)
	Gets FLEXSPI IP tx fifo address for DMA transfer. More...

static uint32_t	FLEXSPI_GetRxFifoAddress (FLEXSPI_Type *base)
	Gets FLEXSPI IP rx fifo address for DMA transfer. More...

FIFO control
static void	FLEXSPI_ResetFifos (FLEXSPI_Type *base, bool txFifo, bool rxFifo)
	Clears the FLEXSPI IP FIFO logic. More...

static void	FLEXSPI_GetFifoCounts (FLEXSPI_Type base, size_t txCount, size_t *rxCount)
	Gets the valid data entries in the FLEXSPI FIFOs. More...

Status
static uint32_t	FLEXSPI_GetInterruptStatusFlags (FLEXSPI_Type *base)
	Get the FLEXSPI interrupt status flags. More...

static void	FLEXSPI_ClearInterruptStatusFlags (FLEXSPI_Type *base, uint32_t mask)
	Get the FLEXSPI interrupt status flags. More...

static flexspi_arb_command_source_t	FLEXSPI_GetArbitratorCommandSource (FLEXSPI_Type *base)
	Gets the trigger source of current command sequence granted by arbitrator. More...

static flexspi_ip_error_code_t	FLEXSPI_GetIPCommandErrorCode (FLEXSPI_Type base, uint8_t index)
	Gets the error code when IP command error detected. More...

static flexspi_ahb_error_code_t	FLEXSPI_GetAHBCommandErrorCode (FLEXSPI_Type base, uint8_t index)
	Gets the error code when AHB command error detected. More...

static bool	FLEXSPI_GetBusIdleStatus (FLEXSPI_Type *base)
	Returns whether the bus is idle. More...

Bus Operations
static void	FLEXSPI_EnableIPParallelMode (FLEXSPI_Type *base, bool enable)
	Enables/disables the FLEXSPI IP command parallel mode. More...

static void	FLEXSPI_EnableAHBParallelMode (FLEXSPI_Type *base, bool enable)
	Enables/disables the FLEXSPI AHB command parallel mode. More...

void	FLEXSPI_UpdateLUT (FLEXSPI_Type base, uint32_t index, const uint32_t cmd, uint32_t count)
	Updates the LUT table. More...

static void	FLEXSPI_WriteData (FLEXSPI_Type *base, uint32_t data, uint8_t fifoIndex)
	Writes data into FIFO. More...

static uint32_t	FLEXSPI_ReadData (FLEXSPI_Type *base, uint8_t fifoIndex)
	Receives data from data FIFO. More...

status_t	FLEXSPI_WriteBlocking (FLEXSPI_Type base, uint32_t buffer, size_t size)
	Sends a buffer of data bytes using blocking method. More...

status_t	FLEXSPI_ReadBlocking (FLEXSPI_Type base, uint32_t buffer, size_t size)
	Receives a buffer of data bytes using a blocking method. More...

status_t	FLEXSPI_TransferBlocking (FLEXSPI_Type base, flexspi_transfer_t xfer)
	Execute command to transfer a buffer data bytes using a blocking method. More...

Transactional
void	FLEXSPI_TransferCreateHandle (FLEXSPI_Type base, flexspi_handle_t handle, flexspi_transfer_callback_t callback, void *userData)
	Initializes the FLEXSPI handle which is used in transactional functions. More...

status_t	FLEXSPI_TransferNonBlocking (FLEXSPI_Type base, flexspi_handle_t handle, flexspi_transfer_t *xfer)
	Performs a interrupt non-blocking transfer on the FLEXSPI bus. More...

status_t	FLEXSPI_TransferGetCount (FLEXSPI_Type base, flexspi_handle_t handle, size_t *count)
	Gets the master transfer status during a interrupt non-blocking transfer. More...

void	FLEXSPI_TransferAbort (FLEXSPI_Type base, flexspi_handle_t handle)
	Aborts an interrupt non-blocking transfer early. More...

void	FLEXSPI_TransferHandleIRQ (FLEXSPI_Type base, flexspi_handle_t handle)
	Master interrupt handler. More...

Data Structure Documentation

struct flexspi_config_t

Data Fields
flexspi_read_sample_clock_t	rxSampleClock
	Sample Clock source selection for Flash Reading. More...

bool	enableSckFreeRunning
	Enable/disable SCK output free-running. More...

bool	enableCombination
	Enable/disable combining PORT A and B Data Pins (SIOA[3:0] and SIOB[3:0]) to support Flash Octal mode. More...

bool	enableDoze
	Enable/disable doze mode support. More...

bool	enableHalfSpeedAccess
	Enable/disable divide by 2 of the clock for half speed commands. More...

bool	enableSckBDiffOpt
	Enable/disable SCKB pad use as SCKA differential clock output, when enable, Port B flash access is not available. More...

bool	enableSameConfigForAll
	Enable/disable same configuration for all connected devices when enabled, same configuration in FLASHA1CRx is applied to all. More...

uint16_t	seqTimeoutCycle
	Timeout wait cycle for command sequence execution, timeout after ahbGrantTimeoutCyle*1024 serial root clock cycles. More...

uint8_t	ipGrantTimeoutCycle
	Timeout wait cycle for IP command grant, timeout after ipGrantTimeoutCycle*1024 AHB clock cycles. More...

uint8_t	txWatermark
	FLEXSPI IP transmit watermark value. More...

uint8_t	rxWatermark
	FLEXSPI receive watermark value. More...

bool	enableAHBWriteIpTxFifo
	Enable AHB bus write access to IP TX FIFO. More...

bool	enableAHBWriteIpRxFifo
	Enable AHB bus write access to IP RX FIFO. More...

uint8_t	ahbGrantTimeoutCycle
	Timeout wait cycle for AHB command grant, timeout after ahbGrantTimeoutCyle*1024 AHB clock cycles. More...

uint16_t	ahbBusTimeoutCycle
	Timeout wait cycle for AHB read/write access, timeout after ahbBusTimeoutCycle*1024 AHB clock cycles. More...

uint8_t	resumeWaitCycle
	Wait cycle for idle state before suspended command sequence resume, timeout after ahbBusTimeoutCycle AHB clock cycles. More...

flexspi_ahbBuffer_config_t	buffer [FSL_FEATURE_FLEXSPI_AHB_BUFFER_COUNT]
	AHB buffer size. More...

bool	enableClearAHBBufferOpt
	Enable/disable automatically clean AHB RX Buffer and TX Buffer when FLEXSPI returns STOP mode ACK. More...

bool	enableAHBPrefetch
	Enable/disable AHB read prefetch feature, when enabled, FLEXSPI will fetch more data than current AHB burst. More...

bool	enableAHBBufferable
	Enable/disable AHB bufferable write access support, when enabled, FLEXSPI return before waiting for command excution finished. More...

bool	enableAHBCachable
	Enable AHB bus cachable read access support. More...

Field Documentation

flexspi_read_sample_clock_t flexspi_config_t::rxSampleClock

bool flexspi_config_t::enableSckFreeRunning

bool flexspi_config_t::enableCombination

bool flexspi_config_t::enableDoze

bool flexspi_config_t::enableHalfSpeedAccess

bool flexspi_config_t::enableSckBDiffOpt

bool flexspi_config_t::enableSameConfigForAll

uint16_t flexspi_config_t::seqTimeoutCycle

uint8_t flexspi_config_t::ipGrantTimeoutCycle

uint8_t flexspi_config_t::txWatermark

uint8_t flexspi_config_t::rxWatermark

bool flexspi_config_t::enableAHBWriteIpTxFifo

bool flexspi_config_t::enableAHBWriteIpRxFifo

uint8_t flexspi_config_t::ahbGrantTimeoutCycle

uint16_t flexspi_config_t::ahbBusTimeoutCycle

uint8_t flexspi_config_t::resumeWaitCycle

flexspi_ahbBuffer_config_t flexspi_config_t::buffer[FSL_FEATURE_FLEXSPI_AHB_BUFFER_COUNT]

bool flexspi_config_t::enableClearAHBBufferOpt

bool flexspi_config_t::enableAHBPrefetch

bool flexspi_config_t::enableAHBBufferable

bool flexspi_config_t::enableAHBCachable

struct flexspi_device_config_t

Data Fields
uint32_t	flexspiRootClk
	FLEXSPI serial root clock. More...

bool	isSck2Enabled
	FLEXSPI use SCK2. More...

uint32_t	flashSize
	Flash size in KByte. More...

flexspi_cs_interval_cycle_unit_t	CSIntervalUnit
	CS interval unit, 1 or 256 cycle. More...

uint16_t	CSInterval
	CS line assert interval, mutiply CS interval unit to get the CS line assert interval cycles. More...

uint8_t	CSHoldTime
	CS line hold time. More...

uint8_t	CSSetupTime
	CS line setup time. More...

uint8_t	dataValidTime
	Data valid time for external device. More...

uint8_t	columnspace
	Column space size. More...

bool	enableWordAddress
	If enable word address. More...

uint8_t	AWRSeqIndex
	Sequence ID for AHB write command. More...

uint8_t	AWRSeqNumber
	Sequence number for AHB write command. More...

uint8_t	ARDSeqIndex
	Sequence ID for AHB read command. More...

uint8_t	ARDSeqNumber
	Sequence number for AHB read command. More...

flexspi_ahb_write_wait_unit_t	AHBWriteWaitUnit
	AHB write wait unit. More...

uint16_t	AHBWriteWaitInterval
	AHB write wait interval, mutiply AHB write interval unit to get the AHB write wait cycles. More...

bool	enableWriteMask
	Enable/Disable FLEXSPI drive DQS pin as write mask when writing to external device. More...

Field Documentation

uint32_t flexspi_device_config_t::flexspiRootClk

bool flexspi_device_config_t::isSck2Enabled

uint32_t flexspi_device_config_t::flashSize

flexspi_cs_interval_cycle_unit_t flexspi_device_config_t::CSIntervalUnit

uint16_t flexspi_device_config_t::CSInterval

uint8_t flexspi_device_config_t::CSHoldTime

uint8_t flexspi_device_config_t::CSSetupTime

uint8_t flexspi_device_config_t::dataValidTime

uint8_t flexspi_device_config_t::columnspace

bool flexspi_device_config_t::enableWordAddress

uint8_t flexspi_device_config_t::AWRSeqIndex

uint8_t flexspi_device_config_t::AWRSeqNumber

uint8_t flexspi_device_config_t::ARDSeqIndex

uint8_t flexspi_device_config_t::ARDSeqNumber

flexspi_ahb_write_wait_unit_t flexspi_device_config_t::AHBWriteWaitUnit

uint16_t flexspi_device_config_t::AHBWriteWaitInterval

bool flexspi_device_config_t::enableWriteMask

struct flexspi_transfer_t

Data Fields
uint32_t	deviceAddress
	Operation device address. More...

flexspi_port_t	port
	Operation port. More...

flexspi_command_type_t	cmdType
	Execution command type. More...

uint8_t	seqIndex
	Sequence ID for command. More...

uint8_t	SeqNumber
	Sequence number for command. More...

uint32_t *	data
	Data buffer. More...

size_t	dataSize
	Data size in bytes. More...

Field Documentation

uint32_t flexspi_transfer_t::deviceAddress

flexspi_port_t flexspi_transfer_t::port

flexspi_command_type_t flexspi_transfer_t::cmdType

uint8_t flexspi_transfer_t::seqIndex

uint8_t flexspi_transfer_t::SeqNumber

uint32_t* flexspi_transfer_t::data

size_t flexspi_transfer_t::dataSize

struct _flexspi_handle

Data Fields
uint32_t	state
	Internal state for FLEXSPI transfer.

uint32_t *	data
	Data buffer. More...

size_t	dataSize
	Remaining Data size in bytes. More...

size_t	transferTotalSize
	Total Data size in bytes. More...

flexspi_transfer_callback_t	completionCallback
	Callback for users while transfer finish or error occurred.

void *	userData
	FLEXSPI callback function parameter. More...

Field Documentation

uint32_t* flexspi_handle_t::data

size_t flexspi_handle_t::dataSize

size_t flexspi_handle_t::transferTotalSize

void* flexspi_handle_t::userData

Macro Definition Documentation

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

#define FLEXSPI_LUT_SEQ	(	cmd0,
		pad0,
		op0,
		cmd1,
		pad1,
		op1
	)

Value:

(FLEXSPI_LUT_OPERAND0(op0) | FLEXSPI_LUT_NUM_PADS0(pad0) | FLEXSPI_LUT_OPCODE0(cmd0) | FLEXSPI_LUT_OPERAND1(op1) | \

FLEXSPI_LUT_NUM_PADS1(pad1) | FLEXSPI_LUT_OPCODE1(cmd1))

Typedef Documentation

typedef void(* flexspi_transfer_callback_t)(FLEXSPI_Type *base, flexspi_handle_t *handle, status_t status, void *userData)

Enumeration Type Documentation

enum _flexspi_status

Enumerator
kStatus_FLEXSPI_Busy	FLEXSPI is busy.
kStatus_FLEXSPI_SequenceExecutionTimeout	Sequence execution timeout error occurred during FLEXSPI transfer.
kStatus_FLEXSPI_IpCommandSequenceError	IP command Sequence execution timeout error occurred during FLEXSPI transfer.
kStatus_FLEXSPI_IpCommandGrantTimeout	IP command grant timeout error occurred during FLEXSPI transfer.

enum _flexspi_command

Enumerator
kFLEXSPI_Command_STOP	Stop execution, deassert CS.
kFLEXSPI_Command_SDR	Transmit Command code to Flash, using SDR mode.
kFLEXSPI_Command_RADDR_SDR	Transmit Row Address to Flash, using SDR mode.
kFLEXSPI_Command_CADDR_SDR	Transmit Column Address to Flash, using SDR mode.
kFLEXSPI_Command_MODE1_SDR	Transmit 1-bit Mode bits to Flash, using SDR mode.
kFLEXSPI_Command_MODE2_SDR	Transmit 2-bit Mode bits to Flash, using SDR mode.
kFLEXSPI_Command_MODE4_SDR	Transmit 4-bit Mode bits to Flash, using SDR mode.
kFLEXSPI_Command_MODE8_SDR	Transmit 8-bit Mode bits to Flash, using SDR mode.
kFLEXSPI_Command_WRITE_SDR	Transmit Programming Data to Flash, using SDR mode.
kFLEXSPI_Command_READ_SDR	Receive Read Data from Flash, using SDR mode.
kFLEXSPI_Command_LEARN_SDR	Receive Read Data or Preamble bit from Flash, SDR mode.
kFLEXSPI_Command_DATSZ_SDR	Transmit Read/Program Data size (byte) to Flash, SDR mode.
kFLEXSPI_Command_DUMMY_SDR	Leave data lines undriven by FlexSPI controller.
kFLEXSPI_Command_DUMMY_RWDS_SDR	Leave data lines undriven by FlexSPI controller, dummy cycles decided by RWDS.
kFLEXSPI_Command_DDR	Transmit Command code to Flash, using DDR mode.
kFLEXSPI_Command_RADDR_DDR	Transmit Row Address to Flash, using DDR mode.
kFLEXSPI_Command_CADDR_DDR	Transmit Column Address to Flash, using DDR mode.
kFLEXSPI_Command_MODE1_DDR	Transmit 1-bit Mode bits to Flash, using DDR mode.
kFLEXSPI_Command_MODE2_DDR	Transmit 2-bit Mode bits to Flash, using DDR mode.
kFLEXSPI_Command_MODE4_DDR	Transmit 4-bit Mode bits to Flash, using DDR mode.
kFLEXSPI_Command_MODE8_DDR	Transmit 8-bit Mode bits to Flash, using DDR mode.
kFLEXSPI_Command_WRITE_DDR	Transmit Programming Data to Flash, using DDR mode.
kFLEXSPI_Command_READ_DDR	Receive Read Data from Flash, using DDR mode.
kFLEXSPI_Command_LEARN_DDR	Receive Read Data or Preamble bit from Flash, DDR mode.
kFLEXSPI_Command_DATSZ_DDR	Transmit Read/Program Data size (byte) to Flash, DDR mode.
kFLEXSPI_Command_DUMMY_DDR	Leave data lines undriven by FlexSPI controller.
kFLEXSPI_Command_DUMMY_RWDS_DDR	Leave data lines undriven by FlexSPI controller, dummy cycles decided by RWDS.
kFLEXSPI_Command_JUMP_ON_CS	Stop execution, deassert CS and save operand[7:0] as the instruction start pointer for next sequence.

enum _flexspi_pad

Enumerator
kFLEXSPI_1PAD	Transmit command/address and transmit/receive data only through DATA0/DATA1.
kFLEXSPI_2PAD	Transmit command/address and transmit/receive data only through DATA[1:0].
kFLEXSPI_4PAD	Transmit command/address and transmit/receive data only through DATA[3:0].
kFLEXSPI_8PAD	Transmit command/address and transmit/receive data only through DATA[7:0].

enum flexspi_flags_t

Enumerator
kFLEXSPI_SequenceExecutionTimeoutFlag	Sequence execution timeout.
kFLEXSPI_AhbBusTimeoutFlag	AHB Bus timeout.
kFLEXSPI_SckStoppedBecauseTxEmptyFlag	SCK is stopped during command sequence because Async TX FIFO empty.
kFLEXSPI_SckStoppedBecauseRxFullFlag	SCK is stopped during command sequence because Async RX FIFO full.
kFLEXSPI_IpTxFifoWatermarkEmpltyFlag	IP TX FIFO WaterMark empty.
kFLEXSPI_IpRxFifoWatermarkAvailableFlag	IP RX FIFO WaterMark available.
kFLEXSPI_AhbCommandSequenceErrorFlag	AHB triggered Command Sequences Error.
kFLEXSPI_IpCommandSequenceErrorFlag	IP triggered Command Sequences Error.
kFLEXSPI_AhbCommandGrantTimeoutFlag	AHB triggered Command Sequences Grant Timeout.
kFLEXSPI_IpCommandGrantTimeoutFlag	IP triggered Command Sequences Grant Timeout.
kFLEXSPI_IpCommandExcutionDoneFlag	IP triggered Command Sequences Execution finished.
kFLEXSPI_AllInterruptFlags	All flags.

enum flexspi_read_sample_clock_t

Enumerator
kFLEXSPI_ReadSampleClkLoopbackInternally	Dummy Read strobe generated by FlexSPI Controller and loopback internally.
kFLEXSPI_ReadSampleClkLoopbackFromDqsPad	Dummy Read strobe generated by FlexSPI Controller and loopback from DQS pad.
kFLEXSPI_ReadSampleClkLoopbackFromSckPad	SCK output clock and loopback from SCK pad.
kFLEXSPI_ReadSampleClkExternalInputFromDqsPad	Flash provided Read strobe and input from DQS pad.

enum flexspi_cs_interval_cycle_unit_t

Enumerator
kFLEXSPI_CsIntervalUnit1SckCycle	Chip selection interval: CSINTERVAL * 1 serial clock cycle.
kFLEXSPI_CsIntervalUnit256SckCycle	Chip selection interval: CSINTERVAL * 256 serial clock cycle.

enum flexspi_ahb_write_wait_unit_t

Enumerator
kFLEXSPI_AhbWriteWaitUnit2AhbCycle	AWRWAIT unit is 2 ahb clock cycle.
kFLEXSPI_AhbWriteWaitUnit8AhbCycle	AWRWAIT unit is 8 ahb clock cycle.
kFLEXSPI_AhbWriteWaitUnit32AhbCycle	AWRWAIT unit is 32 ahb clock cycle.
kFLEXSPI_AhbWriteWaitUnit128AhbCycle	AWRWAIT unit is 128 ahb clock cycle.
kFLEXSPI_AhbWriteWaitUnit512AhbCycle	AWRWAIT unit is 512 ahb clock cycle.
kFLEXSPI_AhbWriteWaitUnit2048AhbCycle	AWRWAIT unit is 2048 ahb clock cycle.
kFLEXSPI_AhbWriteWaitUnit8192AhbCycle	AWRWAIT unit is 8192 ahb clock cycle.
kFLEXSPI_AhbWriteWaitUnit32768AhbCycle	AWRWAIT unit is 32768 ahb clock cycle.

enum flexspi_ip_error_code_t

Enumerator
kFLEXSPI_IpCmdErrorNoError	No error.
kFLEXSPI_IpCmdErrorJumpOnCsInIpCmd	IP command with JMP_ON_CS instruction used.
kFLEXSPI_IpCmdErrorUnknownOpCode	Unknown instruction opcode in the sequence.
kFLEXSPI_IpCmdErrorSdrDummyInDdrSequence	Instruction DUMMY_SDR/DUMMY_RWDS_SDR used in DDR sequence.
kFLEXSPI_IpCmdErrorDdrDummyInSdrSequence	Instruction DUMMY_DDR/DUMMY_RWDS_DDR used in SDR sequence.
kFLEXSPI_IpCmdErrorInvalidAddress	Flash access start address exceed the whole flash address range (A1/A2/B1/B2).
kFLEXSPI_IpCmdErrorSequenceExecutionTimeout	Sequence execution timeout.
kFLEXSPI_IpCmdErrorFlashBoundaryAcrosss	Flash boundary crossed.

enum flexspi_ahb_error_code_t

Enumerator
kFLEXSPI_AhbCmdErrorNoError	No error.
kFLEXSPI_AhbCmdErrorJumpOnCsInWriteCmd	AHB Write command with JMP_ON_CS instruction used in the sequence.
kFLEXSPI_AhbCmdErrorUnknownOpCode	Unknown instruction opcode in the sequence.
kFLEXSPI_AhbCmdErrorSdrDummyInDdrSequence	Instruction DUMMY_SDR/DUMMY_RWDS_SDR used in DDR sequence.
kFLEXSPI_AhbCmdErrorDdrDummyInSdrSequence	Instruction DUMMY_DDR/DUMMY_RWDS_DDR used in SDR sequence.
kFLEXSPI_AhbCmdSequenceExecutionTimeout	Sequence execution timeout.

enum flexspi_port_t

Enumerator
kFLEXSPI_PortA1	Access flash on A1 port.
kFLEXSPI_PortA2	Access flash on A2 port.
kFLEXSPI_PortB1	Access flash on B1 port.
kFLEXSPI_PortB2	Access flash on B2 port.

enum flexspi_arb_command_source_t

enum flexspi_command_type_t

Enumerator
kFLEXSPI_Command	FlexSPI operation: Only command, both TX and Rx buffer are ignored.
kFLEXSPI_Config	FlexSPI operation: Configure device mode, the TX fifo size is fixed in LUT.

Function Documentation

void FLEXSPI_Init	(	FLEXSPI_Type *	base,
		const flexspi_config_t *	config
	)

This function enables the clock for FLEXSPI and also configures the FLEXSPI with the input configure parameters. Users should call this function before any FLEXSPI operations.

Parameters

base	FLEXSPI peripheral base address.
config	FLEXSPI configure structure.

void FLEXSPI_GetDefaultConfig ( flexspi_config_t * config )

Parameters

config FLEXSPI configuration structure.

void FLEXSPI_Deinit ( FLEXSPI_Type * base )

Clears the FLEXSPI state and FLEXSPI module registers.

Parameters

base	FLEXSPI peripheral base address.

void FLEXSPI_SetFlashConfig	(	FLEXSPI_Type *	base,
		flexspi_device_config_t *	config,
		flexspi_port_t	port
	)

This function configures the connected device relevant parameters, such as the size, command, and so on. The flash configuration value cannot have a default value. The user needs to configure it according to the connected device.

Parameters

base	FLEXSPI peripheral base address.
config	Flash configuration parameters.
port	FLEXSPI Operation port.

static void FLEXSPI_SoftwareReset ( FLEXSPI_Type * base )

inlinestatic

This function sets the software reset flags for both AHB and buffer domain and resets both AHB buffer and also IP FIFOs.

Parameters

base	FLEXSPI peripheral base address.

static void FLEXSPI_Enable	(	FLEXSPI_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
enable	True means enable FLEXSPI, false means disable.

static void FLEXSPI_EnableInterrupts	(	FLEXSPI_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
mask	FLEXSPI interrupt source.

static void FLEXSPI_DisableInterrupts	(	FLEXSPI_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
mask	FLEXSPI interrupt source.

static void FLEXSPI_EnableTxDMA	(	FLEXSPI_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
enable	Enable flag for transmit DMA request. Pass true for enable, false for disable.

static void FLEXSPI_EnableRxDMA	(	FLEXSPI_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
enable	Enable flag for receive DMA request. Pass true for enable, false for disable.

static uint32_t FLEXSPI_GetTxFifoAddress ( FLEXSPI_Type * base )

inlinestatic

Parameters

base	FLEXSPI peripheral base address.

Return values

The	tx fifo address.

static uint32_t FLEXSPI_GetRxFifoAddress ( FLEXSPI_Type * base )

inlinestatic

Parameters

base	FLEXSPI peripheral base address.

Return values

The	rx fifo address.

static void FLEXSPI_ResetFifos	(	FLEXSPI_Type *	base,
		bool	txFifo,
		bool	rxFifo
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
txFifo	Pass true to reset TX FIFO.
rxFifo	Pass true to reset RX FIFO.

static void FLEXSPI_GetFifoCounts	(	FLEXSPI_Type *	base,
		size_t *	txCount,
		size_t *	rxCount
	)

inlinestatic

Parameters

	base	FLEXSPI peripheral base address.
[out]	txCount	Pointer through which the current number of bytes in the transmit FIFO is returned. Pass NULL if this value is not required.
[out]	rxCount	Pointer through which the current number of bytes in the receive FIFO is returned. Pass NULL if this value is not required.

static uint32_t FLEXSPI_GetInterruptStatusFlags ( FLEXSPI_Type * base )

inlinestatic

Parameters

base	FLEXSPI peripheral base address.

Return values

interrupt status flag, use status flag to AND flexspi_flags_t could get the related status.

static void FLEXSPI_ClearInterruptStatusFlags	(	FLEXSPI_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
interrupt	status flag.

static flexspi_arb_command_source_t FLEXSPI_GetArbitratorCommandSource ( FLEXSPI_Type * base )

inlinestatic

Parameters

base	FLEXSPI peripheral base address.

Return values

trigger source of current command sequence.

static flexspi_ip_error_code_t FLEXSPI_GetIPCommandErrorCode	(	FLEXSPI_Type *	base,
		uint8_t *	index
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
index	Pointer to a uint8_t type variable to receive the sequence index when error detected.

Return values

error code when IP command error detected.

static flexspi_ahb_error_code_t FLEXSPI_GetAHBCommandErrorCode	(	FLEXSPI_Type *	base,
		uint8_t *	index
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
index	Pointer to a uint8_t type variable to receive the sequence index when error detected.

Return values

error code when AHB command error detected.

static bool FLEXSPI_GetBusIdleStatus ( FLEXSPI_Type * base )

inlinestatic

Parameters

base	FLEXSPI peripheral base address.

Return values

true	Bus is idle.
false	Bus is busy.

static void FLEXSPI_EnableIPParallelMode	(	FLEXSPI_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
enable	True means enable parallel mode, false means disable parallel mode.

static void FLEXSPI_EnableAHBParallelMode	(	FLEXSPI_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address.
enable	True means enable parallel mode, false means disable parallel mode.

void FLEXSPI_UpdateLUT	(	FLEXSPI_Type *	base,
		uint32_t	index,
		const uint32_t *	cmd,
		uint32_t	count
	)

Parameters

base	FLEXSPI peripheral base address.
index	From which index start to update. It could be any index of the LUT table, which also allows user to update command content inside a command. Each command consists of up to 8 instructions and occupy 4*32-bit memory.
cmd	Command sequence array.
count	Number of sequences.

static void FLEXSPI_WriteData	(	FLEXSPI_Type *	base,
		uint32_t	data,
		uint8_t	fifoIndex
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address
data	The data bytes to send
fifoIndex	Destination fifo index.

static uint32_t FLEXSPI_ReadData	(	FLEXSPI_Type *	base,
		uint8_t	fifoIndex
	)

inlinestatic

Parameters

base	FLEXSPI peripheral base address
fifoIndex	Source fifo index.

Returns: The data in the FIFO.

status_t FLEXSPI_WriteBlocking	(	FLEXSPI_Type *	base,
		uint32_t *	buffer,
		size_t	size
	)

Note: This function blocks via polling until all bytes have been sent.

Parameters

base	FLEXSPI peripheral base address
buffer	The data bytes to send
size	The number of data bytes to send

Return values

kStatus_Success	write success without error
kStatus_FLEXSPI_SequenceExecutionTimeout	sequence execution timeout
kStatus_FLEXSPI_IpCommandSequenceError	IP command sequencen error detected
kStatus_FLEXSPI_IpCommandGrantTimeout	IP command grant timeout detected

status_t FLEXSPI_ReadBlocking	(	FLEXSPI_Type *	base,
		uint32_t *	buffer,
		size_t	size
	)

Note: This function blocks via polling until all bytes have been sent.

Parameters

base	FLEXSPI peripheral base address
buffer	The data bytes to send
size	The number of data bytes to receive

Return values

kStatus_Success	read success without error
kStatus_FLEXSPI_SequenceExecutionTimeout	sequence execution timeout
kStatus_FLEXSPI_IpCommandSequenceError	IP command sequencen error detected
kStatus_FLEXSPI_IpCommandGrantTimeout	IP command grant timeout detected

status_t FLEXSPI_TransferBlocking	(	FLEXSPI_Type *	base,
		flexspi_transfer_t *	xfer
	)

Parameters

base	FLEXSPI peripheral base address
xfer	pointer to the transfer structure.

Return values

kStatus_Success	command transfer success without error
kStatus_FLEXSPI_SequenceExecutionTimeout	sequence execution timeout
kStatus_FLEXSPI_IpCommandSequenceError	IP command sequencen error detected
kStatus_FLEXSPI_IpCommandGrantTimeout	IP command grant timeout detected

void FLEXSPI_TransferCreateHandle	(	FLEXSPI_Type *	base,
		flexspi_handle_t *	handle,
		flexspi_transfer_callback_t	callback,
		void *	userData
	)

Parameters

base	FLEXSPI peripheral base address.
handle	pointer to flexspi_handle_t structure to store the transfer state.
callback	pointer to user callback function.
userData	user parameter passed to the callback function.

status_t FLEXSPI_TransferNonBlocking	(	FLEXSPI_Type *	base,
		flexspi_handle_t *	handle,
		flexspi_transfer_t *	xfer
	)

Note: Calling the API returns immediately after transfer initiates. The user needs to call FLEXSPI_GetTransferCount to poll the transfer status to check whether the transfer is finished. If the return status is not kStatus_FLEXSPI_Busy, the transfer is finished. For FLEXSPI_Read, the dataSize should be multiple of rx watermark levle, or FLEXSPI could not read data properly.

Parameters

base	FLEXSPI peripheral base address.
handle	pointer to flexspi_handle_t structure which stores the transfer state.
xfer	pointer to flexspi_transfer_t structure.

Return values

kStatus_Success	Successfully start the data transmission.
kStatus_FLEXSPI_Busy	Previous transmission still not finished.

status_t FLEXSPI_TransferGetCount	(	FLEXSPI_Type *	base,
		flexspi_handle_t *	handle,
		size_t *	count
	)

Parameters

base	FLEXSPI peripheral base address.
handle	pointer to flexspi_handle_t structure which stores the transfer state.
count	Number of bytes transferred so far by the non-blocking transaction.

Return values

kStatus_InvalidArgument	count is Invalid.
kStatus_Success	Successfully return the count.

void FLEXSPI_TransferAbort	(	FLEXSPI_Type *	base,
		flexspi_handle_t *	handle
	)

Note: This API can be called at any time when an interrupt non-blocking transfer initiates to abort the transfer early.

Parameters

base	FLEXSPI peripheral base address.
handle	pointer to flexspi_handle_t structure which stores the transfer state

void FLEXSPI_TransferHandleIRQ	(	FLEXSPI_Type *	base,
		flexspi_handle_t *	handle
	)

Parameters

base	FLEXSPI peripheral base address.
handle	pointer to flexspi_handle_t structure.

Overview

Modules

Data Structures

Macros

Typedefs

Enumerations

Driver version

Initialization and deinitialization

Interrupts

DMA control

FIFO control

Status

Bus Operations

Transactional

Data Structure Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation