Overview

This section describes the programming interface of the FlexCAN driver. The FlexCAN driver configures FlexCAN module, provides a functional and transactional interfaces to build the FlexCAN application.

Typical use case

Message Buffer Send Operation

flexcan_config_t flexcanConfig;
flexcan_frame_t txFrame;
/* Init FlexCAN module. 
FLEXCAN_GetDefaultConfig(&flexcanConfig);
FLEXCAN_Init(EXAMPLE_CAN, &flexcanConfig);
/* Enable FlexCAN module. 
FLEXCAN_Enable(EXAMPLE_CAN, true);
/* Sets up the transmit message buffer. 
FLEXCAN_SetTxMbConfig(EXAMPLE_CAN, TX_MESSAGE_BUFFER_INDEX, true);
/* Prepares the transmit frame for sending. 
txFrame.format = KFLEXCAN_FrameFormatStandard;
txFrame.type   = KFLEXCAN_FrameTypeData;
txFrame.id     = FLEXCAN_ID_STD(0x123);
txFrame.length = 8;
txFrame.dataWord0 = CAN_WORD0_DATA_BYTE_0(0x11) |
                    CAN_WORD0_DATA_BYTE_1(0x22) |
                    CAN_WORD0_DATA_BYTE_2(0x33) |
                    CAN_WORD0_DATA_BYTE_3(0x44);
txFrame.dataWord1 = CAN_WORD1_DATA_BYTE_4(0x55) |
                    CAN_WORD1_DATA_BYTE_5(0x66) |
                    CAN_WORD1_DATA_BYTE_6(0x77) |
                    CAN_WORD1_DATA_BYTE_7(0x88);
/* Writes a transmit message buffer to send a CAN Message. 
FLEXCAN_WriteTxMb(EXAMPLE_CAN, TX_MESSAGE_BUFFER_INDEX, &txFrame);
/* Waits until the transmit message buffer is empty. 
while (!FLEXCAN_GetMbStatusFlags(EXAMPLE_CAN, 1 << TX_MESSAGE_BUFFER_INDEX));
/* Cleans the transmit message buffer empty status. 
FLEXCAN_ClearMbStatusFlags(EXAMPLE_CAN, 1 << TX_MESSAGE_BUFFER_INDEX);

Message Buffer Receive Operation

flexcan_config_t flexcanConfig;
flexcan_frame_t rxFrame;
/* Initializes the FlexCAN module. 
FLEXCAN_GetDefaultConfig(&flexcanConfig);
FLEXCAN_Init(EXAMPLE_CAN, &flexcanConfig);
/* Enables the FlexCAN module. 
FLEXCAN_Enable(EXAMPLE_CAN, true);
/* Sets up the receive message buffer. 
mbConfig.format    = KFLEXCAN_FrameFormatStandard;
mbConfig.type      = KFLEXCAN_FrameTypeData;
mbConfig.id        = FLEXCAN_ID_STD(0x123);
FLEXCAN_SetRxMbConfig(EXAMPLE_CAN, RX_MESSAGE_BUFFER_INDEX, &mbConfig, true);
/* Waits until the receive message buffer is full. 
while (!FLEXCAN_GetMbStatusFlags(EXAMPLE_CAN, 1 << RX_MESSAGE_BUFFER_INDEX));
/* Reads the received message from the receive message buffer. 
FLEXCAN_ReadRxMb(EXAMPLE_CAN, RX_MESSAGE_BUFFER_INDEX, &rxFrame);
/* Cleans the receive message buffer full status. 
FLEXCAN_ClearMbStatusFlags(EXAMPLE_CAN, 1 << RX_MESSAGE_BUFFER_INDEX);

Receive FIFO Operation

uint32_t rxFifoFilter[] = {FLEXCAN_RX_FIFO_STD_FILTER_TYPE_A(0x321, 0, 0),
                           FLEXCAN_RX_FIFO_STD_FILTER_TYPE_A(0x321, 1, 0),
                           FLEXCAN_RX_FIFO_STD_FILTER_TYPE_A(0x123, 0, 0),
                           FLEXCAN_RX_FIFO_STD_FILTER_TYPE_A(0x123, 1, 0)};
flexcan_config_t flexcanConfig;
flexcan_frame_t rxFrame;
/* Initializes the FlexCAN module. 
FLEXCAN_GetDefaultConfig(&flexcanConfig);
FLEXCAN_Init(EXAMPLE_CAN, &flexcanConfig);
/* Enables the FlexCAN module. 
FLEXCAN_Enable(EXAMPLE_CAN, true);
/* Sets up the receive FIFO. 
rxFifoConfig.idFilterTable = rxFifoFilter;
rxFifoConfig.idFilterType  = KFLEXCAN_RxFifoFilterTypeA;
rxFifoConfig.idFilterNum   = sizeof(rxFifoFilter) / sizeof(rxFifoFilter[0]);
rxFifoConfig.priority      = KFLEXCAN_RxFifoPrioHigh;
FlEXCAN_SetRxFifoConfig(EXAMPLE_CAN, &rxFifoConfig, true);
/* Waits until the receive FIFO becomes available. 
while (!FLEXCAN_GetMbStatusFlags(EXAMPLE_CAN, KFLEXCAN_RxFifoFrameAvlFlag));
/* Reads the message from the receive FIFO. 
FlEXCAN_ReadRxFifo(EXAMPLE_CAN, &rxFrame);
/* Cleans the receive FIFO available status. 
FLEXCAN_ClearMbStatusFlags(EXAMPLE_CAN, KFLEXCAN_RxFifoFrameAvlFlag);

Files
file	fsl_flexcan.h

Data Structures
struct	flexcan_frame_t
	FlexCAN message frame structure. More...

struct	flexcan_config_t
	FlexCAN module configuration structure. More...

struct	flexcan_timing_config_t
	FlexCAN protocol timing characteristic configuration structure. More...

struct	flexcan_rx_mb_config_t
	FlexCAN Receive Message Buffer configuration structure. More...

struct	flexcan_rx_fifo_config_t
	FlexCAN Rx FIFO configure structure. More...

struct	flexcan_mb_transfer_t
	FlexCAN Message Buffer transfer. More...

struct	flexcan_fifo_transfer_t
	FlexCAN Rx FIFO transfer. More...

struct	flexcan_handle_t
	FlexCAN handle structure. More...

Macros
#define	FLEXCAN_ID_STD(id) (((uint32_t)(((uint32_t)(id)) << CAN_ID_STD_SHIFT)) & CAN_ID_STD_MASK)
	FlexCAN Frame ID helper macro. More...

#define	FLEXCAN_ID_EXT(id)
	Extend Frame ID helper macro. More...

#define	FLEXCAN_RX_MB_STD_MASK(id, rtr, ide)
	FlexCAN Rx Message Buffer Mask helper macro. More...

#define	FLEXCAN_RX_MB_EXT_MASK(id, rtr, ide)
	Extend Rx Message Buffer Mask helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(id, rtr, ide)
	FlexCAN Rx FIFO Mask helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_HIGH(id, rtr, ide)
	Standard Rx FIFO Mask helper macro Type B upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_LOW(id, rtr, ide)
	Standard Rx FIFO Mask helper macro Type B lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_HIGH(id) ((FLEXCAN_ID_STD(id) & 0x7F8) << 21)
	Standard Rx FIFO Mask helper macro Type C upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_HIGH(id) ((FLEXCAN_ID_STD(id) & 0x7F8) << 13)
	Standard Rx FIFO Mask helper macro Type C mid-upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_LOW(id) ((FLEXCAN_ID_STD(id) & 0x7F8) << 5)
	Standard Rx FIFO Mask helper macro Type C mid-lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_LOW(id) ((FLEXCAN_ID_STD(id) & 0x7F8) >> 3)
	Standard Rx FIFO Mask helper macro Type C lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_A(id, rtr, ide)
	Extend Rx FIFO Mask helper macro Type A helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_HIGH(id, rtr, ide)
	Extend Rx FIFO Mask helper macro Type B upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_LOW(id, rtr, ide)
	Extend Rx FIFO Mask helper macro Type B lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_HIGH(id) ((FLEXCAN_ID_EXT(id) & 0x1FE00000) << 3)
	Extend Rx FIFO Mask helper macro Type C upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_HIGH(id)
	Extend Rx FIFO Mask helper macro Type C mid-upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_LOW(id)
	Extend Rx FIFO Mask helper macro Type C mid-lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_LOW(id) ((FLEXCAN_ID_EXT(id) & 0x1FE00000) >> 21)
	Extend Rx FIFO Mask helper macro Type C lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_FILTER_TYPE_A(id, rtr, ide) FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(id, rtr, ide)
	FlexCAN Rx FIFO Filter helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_FILTER_TYPE_B_HIGH(id, rtr, ide)
	Standard Rx FIFO Filter helper macro Type B upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_FILTER_TYPE_B_LOW(id, rtr, ide)
	Standard Rx FIFO Filter helper macro Type B lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_HIGH(id)
	Standard Rx FIFO Filter helper macro Type C upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_MID_HIGH(id)
	Standard Rx FIFO Filter helper macro Type C mid-upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_MID_LOW(id)
	Standard Rx FIFO Filter helper macro Type C mid-lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_LOW(id) FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_LOW(id)
	Standard Rx FIFO Filter helper macro Type C lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_A(id, rtr, ide) FLEXCAN_RX_FIFO_EXT_MASK_TYPE_A(id, rtr, ide)
	Extend Rx FIFO Filter helper macro Type A helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_B_HIGH(id, rtr, ide)
	Extend Rx FIFO Filter helper macro Type B upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_B_LOW(id, rtr, ide)
	Extend Rx FIFO Filter helper macro Type B lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_HIGH(id) FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_HIGH(id)
	Extend Rx FIFO Filter helper macro Type C upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_MID_HIGH(id)
	Extend Rx FIFO Filter helper macro Type C mid-upper part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_MID_LOW(id)
	Extend Rx FIFO Filter helper macro Type C mid-lower part helper macro. More...

#define	FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_LOW(id) FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_LOW(id)
	Extend Rx FIFO Filter helper macro Type C lower part helper macro. More...

Typedefs
typedef void(*	flexcan_transfer_callback_t )(CAN_Type base, flexcan_handle_t handle, status_t status, uint32_t result, void *userData)
	FlexCAN transfer callback function. More...

Enumerations
enum	_flexcan_status { kStatus_FLEXCAN_TxBusy = MAKE_STATUS(kStatusGroup_FLEXCAN, 0), kStatus_FLEXCAN_TxIdle = MAKE_STATUS(kStatusGroup_FLEXCAN, 1), kStatus_FLEXCAN_TxSwitchToRx, kStatus_FLEXCAN_RxBusy = MAKE_STATUS(kStatusGroup_FLEXCAN, 3), kStatus_FLEXCAN_RxIdle = MAKE_STATUS(kStatusGroup_FLEXCAN, 4), kStatus_FLEXCAN_RxOverflow = MAKE_STATUS(kStatusGroup_FLEXCAN, 5), kStatus_FLEXCAN_RxFifoBusy = MAKE_STATUS(kStatusGroup_FLEXCAN, 6), kStatus_FLEXCAN_RxFifoIdle = MAKE_STATUS(kStatusGroup_FLEXCAN, 7), kStatus_FLEXCAN_RxFifoOverflow = MAKE_STATUS(kStatusGroup_FLEXCAN, 8), kStatus_FLEXCAN_RxFifoWarning = MAKE_STATUS(kStatusGroup_FLEXCAN, 0), kStatus_FLEXCAN_ErrorStatus = MAKE_STATUS(kStatusGroup_FLEXCAN, 10), kStatus_FLEXCAN_UnHandled = MAKE_STATUS(kStatusGroup_FLEXCAN, 11) }
	FlexCAN transfer status. More...

enum	flexcan_frame_format_t { kFLEXCAN_FrameFormatStandard = 0x0U, kFLEXCAN_FrameFormatExtend = 0x1U }
	FlexCAN frame format. More...

enum	flexcan_frame_type_t { kFLEXCAN_FrameTypeData = 0x0U, kFLEXCAN_FrameTypeRemote = 0x1U }
	FlexCAN frame type. More...

enum	flexcan_clock_source_t { kFLEXCAN_ClkSrcOsc = 0x0U, kFLEXCAN_ClkSrcPeri = 0x1U }
	FlexCAN clock source. More...

enum	flexcan_rx_fifo_filter_type_t { kFLEXCAN_RxFifoFilterTypeA = 0x0U, kFLEXCAN_RxFifoFilterTypeB, kFLEXCAN_RxFifoFilterTypeC, kFLEXCAN_RxFifoFilterTypeD = 0x3U }
	FlexCAN Rx Fifo Filter type. More...

enum	flexcan_rx_fifo_priority_t { kFLEXCAN_RxFifoPrioLow = 0x0U, kFLEXCAN_RxFifoPrioHigh = 0x1U }
	FlexCAN Rx FIFO priority. More...

enum	_flexcan_interrupt_enable { kFLEXCAN_BusOffInterruptEnable = CAN_CTRL1_BOFFMSK_MASK, kFLEXCAN_ErrorInterruptEnable = CAN_CTRL1_ERRMSK_MASK, kFLEXCAN_RxWarningInterruptEnable = CAN_CTRL1_RWRNMSK_MASK, kFLEXCAN_TxWarningInterruptEnable = CAN_CTRL1_TWRNMSK_MASK, kFLEXCAN_WakeUpInterruptEnable = CAN_MCR_WAKMSK_MASK }
	FlexCAN interrupt configuration structure, default settings all disabled. More...

enum	_flexcan_flags { kFLEXCAN_SynchFlag = CAN_ESR1_SYNCH_MASK, kFLEXCAN_TxWarningIntFlag = CAN_ESR1_TWRNINT_MASK, kFLEXCAN_RxWarningIntFlag = CAN_ESR1_RWRNINT_MASK, kFLEXCAN_TxErrorWarningFlag = CAN_ESR1_TXWRN_MASK, kFLEXCAN_RxErrorWarningFlag = CAN_ESR1_RXWRN_MASK, kFLEXCAN_IdleFlag = CAN_ESR1_IDLE_MASK, kFLEXCAN_FaultConfinementFlag = CAN_ESR1_FLTCONF_MASK, kFLEXCAN_TransmittingFlag = CAN_ESR1_TX_MASK, kFLEXCAN_ReceivingFlag = CAN_ESR1_RX_MASK, kFLEXCAN_BusOffIntFlag = CAN_ESR1_BOFFINT_MASK, kFLEXCAN_ErrorIntFlag = CAN_ESR1_ERRINT_MASK, kFLEXCAN_WakeUpIntFlag = CAN_ESR1_WAKINT_MASK, kFLEXCAN_ErrorFlag }
	FlexCAN status flags. More...

enum	_flexcan_error_flags { kFLEXCAN_StuffingError = CAN_ESR1_STFERR_MASK, kFLEXCAN_FormError = CAN_ESR1_FRMERR_MASK, kFLEXCAN_CrcError = CAN_ESR1_CRCERR_MASK, kFLEXCAN_AckError = CAN_ESR1_ACKERR_MASK, kFLEXCAN_Bit0Error = CAN_ESR1_BIT0ERR_MASK, kFLEXCAN_Bit1Error = CAN_ESR1_BIT1ERR_MASK }
	FlexCAN error status flags. More...

enum	_flexcan_rx_fifo_flags { kFLEXCAN_RxFifoOverflowFlag = CAN_IFLAG1_BUF7I_MASK, kFLEXCAN_RxFifoWarningFlag = CAN_IFLAG1_BUF6I_MASK, kFLEXCAN_RxFifoFrameAvlFlag = CAN_IFLAG1_BUF5I_MASK }
	FlexCAN Rx FIFO status flags. More...

Driver version
#define	FLEXCAN_DRIVER_VERSION (MAKE_VERSION(2, 1, 0))
	FlexCAN driver version 2.1.0. More...

Initialization and deinitialization
void	FLEXCAN_Init (CAN_Type base, const flexcan_config_t config, uint32_t sourceClock_Hz)
	Initializes a FlexCAN instance. More...

void	FLEXCAN_Deinit (CAN_Type *base)
	De-initializes a FlexCAN instance. More...

void	FLEXCAN_GetDefaultConfig (flexcan_config_t *config)
	Get the default configuration structure. More...

Configuration.
void	FLEXCAN_SetTimingConfig (CAN_Type base, const flexcan_timing_config_t config)
	Sets the FlexCAN protocol timing characteristic. More...

void	FlEXCAN_SetRxMbGlobalMask (CAN_Type *base, uint32_t mask)
	Sets the FlexCAN receive message buffer global mask. More...

void	FlEXCAN_SetRxFifoGlobalMask (CAN_Type *base, uint32_t mask)
	Sets the FlexCAN receive FIFO global mask. More...

void	FlEXCAN_SetRxIndividualMask (CAN_Type *base, uint8_t maskIdx, uint32_t mask)
	Sets the FlexCAN receive individual mask. More...

void	FLEXCAN_SetTxMbConfig (CAN_Type *base, uint8_t mbIdx, bool enable)
	Configures a FlexCAN transmit message buffer. More...

void	FLEXCAN_SetRxMbConfig (CAN_Type base, uint8_t mbIdx, const flexcan_rx_mb_config_t config, bool enable)
	Configures a FlexCAN Receive Message Buffer. More...

void	FlEXCAN_SetRxFifoConfig (CAN_Type base, const flexcan_rx_fifo_config_t config, bool enable)
	Configures the FlexCAN Rx FIFO. More...

Status
static uint32_t	FLEXCAN_GetStatusFlags (CAN_Type *base)
	Gets the FlexCAN module interrupt flags. More...

static void	FLEXCAN_ClearStatusFlags (CAN_Type *base, uint32_t mask)
	Clears status flags with the provided mask. More...

static void	FlEXCAN_GetBusErrCount (CAN_Type base, uint8_t txErrBuf, uint8_t *rxErrBuf)
	Gets the FlexCAN Bus Error Counter value. More...

static uint32_t	FLEXCAN_GetMbStatusFlags (CAN_Type *base, uint32_t mask)
	Gets the FlexCAN Message Buffer interrupt flags. More...

static void	FLEXCAN_ClearMbStatusFlags (CAN_Type *base, uint32_t mask)
	Clears the FlexCAN Message Buffer interrupt flags. More...

Interrupts
static void	FLEXCAN_EnableInterrupts (CAN_Type *base, uint32_t mask)
	Enables FlexCAN interrupts according to provided mask. More...

static void	FLEXCAN_DisableInterrupts (CAN_Type *base, uint32_t mask)
	Disables FlexCAN interrupts according to provided mask. More...

static void	FLEXCAN_EnableMbInterrupts (CAN_Type *base, uint32_t mask)
	Enables FlexCAN Message Buffer interrupts. More...

static void	FLEXCAN_DisableMbInterrupts (CAN_Type *base, uint32_t mask)
	Disables FlexCAN Message Buffer interrupts. More...

Bus Operations
static void	FLEXCAN_Enable (CAN_Type *base, bool enable)
	Enables or disables the FlexCAN module operation. More...

status_t	FLEXCAN_WriteTxMb (CAN_Type base, uint8_t mbIdx, const flexcan_frame_t txFrame)
	Writes a FlexCAN Message to Transmit Message Buffer. More...

status_t	FLEXCAN_ReadRxMb (CAN_Type base, uint8_t mbIdx, flexcan_frame_t rxFrame)
	Reads a FlexCAN Message from Receive Message Buffer. More...

status_t	FlEXCAN_ReadRxFifo (CAN_Type base, flexcan_frame_t rxFrame)
	Reads a FlexCAN Message from Rx FIFO. More...

Transactional
status_t	FlEXCAN_TransferSendBlocking (CAN_Type base, uint8_t mbIdx, flexcan_frame_t txFrame)
	Performs a polling send transaction on the CAN bus. More...

status_t	FlEXCAN_TransferReceiveBlocking (CAN_Type base, uint8_t mbIdx, flexcan_frame_t rxFrame)
	Performs a polling receive transaction on the CAN bus. More...

status_t	FlEXCAN_TransferReceiveFifoBlocking (CAN_Type base, flexcan_frame_t rxFrame)
	Performs a polling receive transaction from Rx FIFO on the CAN bus. More...

void	FLEXCAN_TransferCreateHandle (CAN_Type base, flexcan_handle_t handle, flexcan_transfer_callback_t callback, void *userData)
	Initializes the FlexCAN handle. More...

status_t	FLEXCAN_TransferSendNonBlocking (CAN_Type base, flexcan_handle_t handle, flexcan_mb_transfer_t *xfer)
	Sends a message using IRQ. More...

status_t	FLEXCAN_TransferReceiveNonBlocking (CAN_Type base, flexcan_handle_t handle, flexcan_mb_transfer_t *xfer)
	Receives a message using IRQ. More...

status_t	FLEXCAN_TransferReceiveFifoNonBlocking (CAN_Type base, flexcan_handle_t handle, flexcan_fifo_transfer_t *xfer)
	Receives a message from Rx FIFO using IRQ. More...

void	FLEXCAN_TransferAbortSend (CAN_Type base, flexcan_handle_t handle, uint8_t mbIdx)
	Aborts the interrupt driven message send process. More...

void	FLEXCAN_TransferAbortReceive (CAN_Type base, flexcan_handle_t handle, uint8_t mbIdx)
	Aborts the interrupt driven message receive process. More...

void	FLEXCAN_TransferAbortReceiveFifo (CAN_Type base, flexcan_handle_t handle)
	Aborts the interrupt driven message receive from Rx FIFO process. More...

void	FLEXCAN_TransferHandleIRQ (CAN_Type base, flexcan_handle_t handle)
	FlexCAN IRQ handle function. More...

Data Structure Documentation

struct flexcan_frame_t

Field Documentation

uint32_t flexcan_frame_t::timestamp

uint32_t flexcan_frame_t::length

uint32_t flexcan_frame_t::type

uint32_t flexcan_frame_t::format

uint32_t flexcan_frame_t::reserve1

uint32_t flexcan_frame_t::idhit

uint32_t flexcan_frame_t::id

uint32_t flexcan_frame_t::reserve2

uint32_t flexcan_frame_t::dataWord0

uint32_t flexcan_frame_t::dataWord1

uint8_t flexcan_frame_t::dataByte3

uint8_t flexcan_frame_t::dataByte2

uint8_t flexcan_frame_t::dataByte1

uint8_t flexcan_frame_t::dataByte0

uint8_t flexcan_frame_t::dataByte7

uint8_t flexcan_frame_t::dataByte6

uint8_t flexcan_frame_t::dataByte5

uint8_t flexcan_frame_t::dataByte4

struct flexcan_config_t

Data Fields
uint32_t	baudRate
	FlexCAN baud rate in bps. More...

flexcan_clock_source_t	clkSrc
	Clock source for FlexCAN Protocol Engine. More...

uint8_t	maxMbNum
	The maximum number of Message Buffers used by user. More...

bool	enableLoopBack
	Enable or Disable Loop Back Self Test Mode. More...

bool	enableSelfWakeup
	Enable or Disable Self Wakeup Mode. More...

bool	enableIndividMask
	Enable or Disable Rx Individual Mask. More...

Field Documentation

uint32_t flexcan_config_t::baudRate

flexcan_clock_source_t flexcan_config_t::clkSrc

uint8_t flexcan_config_t::maxMbNum

bool flexcan_config_t::enableLoopBack

bool flexcan_config_t::enableSelfWakeup

bool flexcan_config_t::enableIndividMask

struct flexcan_timing_config_t

Data Fields
uint8_t	preDivider
	Clock Pre-scaler Division Factor. More...

uint8_t	rJumpwidth
	Re-sync Jump Width. More...

uint8_t	phaseSeg1
	Phase Segment 1. More...

uint8_t	phaseSeg2
	Phase Segment 2. More...

uint8_t	propSeg
	Propagation Segment. More...

Field Documentation

uint8_t flexcan_timing_config_t::preDivider

uint8_t flexcan_timing_config_t::rJumpwidth

uint8_t flexcan_timing_config_t::phaseSeg1

uint8_t flexcan_timing_config_t::phaseSeg2

uint8_t flexcan_timing_config_t::propSeg

struct flexcan_rx_mb_config_t

This structure is used as the parameter of FLEXCAN_SetRxMbConfig() function. The FLEXCAN_SetRxMbConfig() function is used to configure FlexCAN Receive Message Buffer. The function abort previous receiving process, clean the Message Buffer and activate the Rx Message Buffer using given Message Buffer setting.

Data Fields
uint32_t	id
	CAN Message Buffer Frame Identifier, should be set using FLEXCAN_ID_EXT() or FLEXCAN_ID_STD() macro. More...

flexcan_frame_format_t	format
	CAN Frame Identifier format(Standard of Extend). More...

flexcan_frame_type_t	type
	CAN Frame Type(Data or Remote). More...

Field Documentation

uint32_t flexcan_rx_mb_config_t::id

flexcan_frame_format_t flexcan_rx_mb_config_t::format

flexcan_frame_type_t flexcan_rx_mb_config_t::type

struct flexcan_rx_fifo_config_t

Data Fields
uint32_t *	idFilterTable
	Pointer to FlexCAN Rx FIFO identifier filter table. More...

uint8_t	idFilterNum
	The quantity of filter elements. More...

flexcan_rx_fifo_filter_type_t	idFilterType
	The FlexCAN Rx FIFO Filter type. More...

flexcan_rx_fifo_priority_t	priority
	The FlexCAN Rx FIFO receive priority. More...

Field Documentation

uint32_t* flexcan_rx_fifo_config_t::idFilterTable

uint8_t flexcan_rx_fifo_config_t::idFilterNum

flexcan_rx_fifo_filter_type_t flexcan_rx_fifo_config_t::idFilterType

flexcan_rx_fifo_priority_t flexcan_rx_fifo_config_t::priority

struct flexcan_mb_transfer_t

Data Fields
flexcan_frame_t *	frame
	The buffer of CAN Message to be transfer. More...

uint8_t	mbIdx
	The index of Message buffer used to transfer Message. More...

Field Documentation

flexcan_frame_t* flexcan_mb_transfer_t::frame

uint8_t flexcan_mb_transfer_t::mbIdx

struct flexcan_fifo_transfer_t

Data Fields
flexcan_frame_t *	frame
	The buffer of CAN Message to be received from Rx FIFO. More...

Field Documentation

flexcan_frame_t* flexcan_fifo_transfer_t::frame

struct _flexcan_handle

FlexCAN handle structure definition.

Data Fields
flexcan_transfer_callback_t	callback
	Callback function. More...

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

flexcan_frame_t *volatile	mbFrameBuf [CAN_WORD1_COUNT]
	The buffer for received data from Message Buffers. More...

flexcan_frame_t *volatile	rxFifoFrameBuf
	The buffer for received data from Rx FIFO. More...

volatile uint8_t	mbState [CAN_WORD1_COUNT]
	Message Buffer transfer state. More...

volatile uint8_t	rxFifoState
	Rx FIFO transfer state. More...

Field Documentation

flexcan_transfer_callback_t flexcan_handle_t::callback

void* flexcan_handle_t::userData

flexcan_frame_t* volatile flexcan_handle_t::mbFrameBuf[CAN_WORD1_COUNT]

flexcan_frame_t* volatile flexcan_handle_t::rxFifoFrameBuf

volatile uint8_t flexcan_handle_t::mbState[CAN_WORD1_COUNT]

volatile uint8_t flexcan_handle_t::rxFifoState

Macro Definition Documentation

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

#define FLEXCAN_ID_STD ( id ) (((uint32_t)(((uint32_t)(id)) << CAN_ID_STD_SHIFT)) & CAN_ID_STD_MASK)

Standard Frame ID helper macro.

#define FLEXCAN_ID_EXT ( id )

Value:

(((uint32_t)(((uint32_t)(id)) << CAN_ID_EXT_SHIFT)) & \

(CAN_ID_EXT_MASK | CAN_ID_STD_MASK))

#define FLEXCAN_RX_MB_STD_MASK	(	id,
		rtr,
		ide
	)

Value:

(((uint32_t)((uint32_t)(rtr) << 31) | (uint32_t)((uint32_t)(ide) << 30)) | \

FLEXCAN_ID_STD(id))

FLEXCAN_ID_STD

#define FLEXCAN_ID_STD(id)

FlexCAN Frame ID helper macro.

Definition: fsl_flexcan.h:53

Standard Rx Message Buffer Mask helper macro.

#define FLEXCAN_RX_MB_EXT_MASK	(	id,
		rtr,
		ide
	)

Value:

(((uint32_t)((uint32_t)(rtr) << 31) | (uint32_t)((uint32_t)(ide) << 30)) | \

FLEXCAN_ID_EXT(id))

FLEXCAN_ID_EXT

#define FLEXCAN_ID_EXT(id)

Extend Frame ID helper macro.

Definition: fsl_flexcan.h:56

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_A	(	id,
		rtr,
		ide
	)

Value:

(((uint32_t)((uint32_t)(rtr) << 31) | (uint32_t)((uint32_t)(ide) << 30)) | \

(FLEXCAN_ID_STD(id) << 1))

FLEXCAN_ID_STD

#define FLEXCAN_ID_STD(id)

FlexCAN Frame ID helper macro.

Definition: fsl_flexcan.h:53

Standard Rx FIFO Mask helper macro Type A helper macro.

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_HIGH	(	id,
		rtr,
		ide
	)

Value:

(((uint32_t)((uint32_t)(rtr) << 31) | (uint32_t)((uint32_t)(ide) << 30)) | \

(FLEXCAN_ID_STD(id) << 16))

FLEXCAN_ID_STD

#define FLEXCAN_ID_STD(id)

FlexCAN Frame ID helper macro.

Definition: fsl_flexcan.h:53

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_LOW	(	id,
		rtr,
		ide
	)

Value:

(((uint32_t)((uint32_t)(rtr) << 15) | (uint32_t)((uint32_t)(ide) << 14)) | \

FLEXCAN_ID_STD(id))

FLEXCAN_ID_STD

#define FLEXCAN_ID_STD(id)

FlexCAN Frame ID helper macro.

Definition: fsl_flexcan.h:53

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_HIGH ( id ) ((FLEXCAN_ID_STD(id) & 0x7F8) << 21)

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_HIGH ( id ) ((FLEXCAN_ID_STD(id) & 0x7F8) << 13)

\

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_LOW ( id ) ((FLEXCAN_ID_STD(id) & 0x7F8) << 5)

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_LOW ( id ) ((FLEXCAN_ID_STD(id) & 0x7F8) >> 3)

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_A	(	id,
		rtr,
		ide
	)

Value:

(((uint32_t)((uint32_t)(rtr) << 31) | (uint32_t)((uint32_t)(ide) << 30)) | \

(FLEXCAN_ID_EXT(id) << 1))

FLEXCAN_ID_EXT

#define FLEXCAN_ID_EXT(id)

Extend Frame ID helper macro.

Definition: fsl_flexcan.h:56

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_HIGH	(	id,
		rtr,
		ide
	)

Value:

(                                                                             \
        ((uint32_t)((uint32_t)(rtr) << 31) | (uint32_t)((uint32_t)(ide) << 30)) | \
        ((FLEXCAN_ID_EXT(id) & 0x1FFF8000)                                        \
         << 1))

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_LOW	(	id,
		rtr,
		ide
	)

Value:

(((uint32_t)((uint32_t)(rtr) << 15) | (uint32_t)((uint32_t)(ide) << 14)) | \
     ((FLEXCAN_ID_EXT(id) & 0x1FFF8000) >>                                     \
      15))

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_HIGH ( id ) ((FLEXCAN_ID_EXT(id) & 0x1FE00000) << 3)

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_HIGH ( id )

Value:

((FLEXCAN_ID_EXT(id) & 0x1FE00000) >> \

5)

FLEXCAN_ID_EXT

#define FLEXCAN_ID_EXT(id)

Extend Frame ID helper macro.

Definition: fsl_flexcan.h:56

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_LOW ( id )

Value:

((FLEXCAN_ID_EXT(id) & 0x1FE00000) >> \

13)

FLEXCAN_ID_EXT

#define FLEXCAN_ID_EXT(id)

Extend Frame ID helper macro.

Definition: fsl_flexcan.h:56

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_LOW ( id ) ((FLEXCAN_ID_EXT(id) & 0x1FE00000) >> 21)

#define FLEXCAN_RX_FIFO_STD_FILTER_TYPE_A	(	id,
		rtr,
		ide
	)	FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(id, rtr, ide)

Standard Rx FIFO Filter helper macro Type A helper macro.

#define FLEXCAN_RX_FIFO_STD_FILTER_TYPE_B_HIGH	(	id,
		rtr,
		ide
	)

Value:

FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_HIGH( \

id, rtr, ide)

FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_HIGH

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_HIGH(id, rtr, ide)

Standard Rx FIFO Mask helper macro Type B upper part helper macro.

Definition: fsl_flexcan.h:80

#define FLEXCAN_RX_FIFO_STD_FILTER_TYPE_B_LOW	(	id,
		rtr,
		ide
	)

Value:

FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_LOW( \

id, rtr, ide)

FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_LOW

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_B_LOW(id, rtr, ide)

Standard Rx FIFO Mask helper macro Type B lower part helper macro.

Definition: fsl_flexcan.h:85

#define FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_HIGH ( id )

Value:

FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_HIGH( \

id)

FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_HIGH

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_HIGH(id)

Standard Rx FIFO Mask helper macro Type C upper part helper macro.

Definition: fsl_flexcan.h:90

#define FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_MID_HIGH ( id )

Value:

FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_HIGH( \

id)

FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_HIGH

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_HIGH(id)

Standard Rx FIFO Mask helper macro Type C mid-upper part helper macro.

Definition: fsl_flexcan.h:93

#define FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_MID_LOW ( id )

Value:

FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_LOW( \

id)

FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_LOW

#define FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_MID_LOW(id)

Standard Rx FIFO Mask helper macro Type C mid-lower part helper macro.

Definition: fsl_flexcan.h:99

#define FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_LOW ( id ) FLEXCAN_RX_FIFO_STD_MASK_TYPE_C_LOW(id)

\

#define FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_A	(	id,
		rtr,
		ide
	)	FLEXCAN_RX_FIFO_EXT_MASK_TYPE_A(id, rtr, ide)

#define FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_B_HIGH	(	id,
		rtr,
		ide
	)

Value:

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_HIGH( \

id, rtr, ide)

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_HIGH

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_HIGH(id, rtr, ide)

Extend Rx FIFO Mask helper macro Type B upper part helper macro.

Definition: fsl_flexcan.h:110

#define FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_B_LOW	(	id,
		rtr,
		ide
	)

Value:

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_LOW( \

id, rtr, ide)

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_LOW

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_B_LOW(id, rtr, ide)

Extend Rx FIFO Mask helper macro Type B lower part helper macro.

Definition: fsl_flexcan.h:119

#define FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_HIGH ( id ) FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_HIGH(id)

\

#define FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_MID_HIGH ( id )

Value:

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_HIGH( \

id)

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_HIGH

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_HIGH(id)

Extend Rx FIFO Mask helper macro Type C mid-upper part helper macro.

Definition: fsl_flexcan.h:129

#define FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_MID_LOW ( id )

Value:

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_LOW( \

id)

FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_LOW

#define FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_MID_LOW(id)

Extend Rx FIFO Mask helper macro Type C mid-lower part helper macro.

Definition: fsl_flexcan.h:134

#define FLEXCAN_RX_FIFO_EXT_FILTER_TYPE_C_LOW ( id ) FLEXCAN_RX_FIFO_EXT_MASK_TYPE_C_LOW(id)

Typedef Documentation

typedef void(* flexcan_transfer_callback_t)(CAN_Type *base, flexcan_handle_t *handle, status_t status, uint32_t result, void *userData)

The FlexCAN transfer callback returns a value from the underlying layer. If the status equals to kStatus_FLEXCAN_ErrorStatus, the result parameter is the Content of FlexCAN status register which can be used to get the working status(or error status) of FlexCAN module. If the status equals to other FlexCAN Message Buffer transfer status, the result is the index of Message Buffer that generate transfer event. If the status equals to other FlexCAN Message Buffer transfer status, the result is meaningless and should be Ignored.

Enumeration Type Documentation

enum _flexcan_status

Enumerator
kStatus_FLEXCAN_TxBusy	Tx Message Buffer is Busy.
kStatus_FLEXCAN_TxIdle	Tx Message Buffer is Idle.
kStatus_FLEXCAN_TxSwitchToRx	Remote Message is send out and Message buffer changed to Receive one.
kStatus_FLEXCAN_RxBusy	Rx Message Buffer is Busy.
kStatus_FLEXCAN_RxIdle	Rx Message Buffer is Idle.
kStatus_FLEXCAN_RxOverflow	Rx Message Buffer is Overflowed.
kStatus_FLEXCAN_RxFifoBusy	Rx Message FIFO is Busy.
kStatus_FLEXCAN_RxFifoIdle	Rx Message FIFO is Idle.
kStatus_FLEXCAN_RxFifoOverflow	Rx Message FIFO is overflowed.
kStatus_FLEXCAN_RxFifoWarning	Rx Message FIFO is almost overflowed.
kStatus_FLEXCAN_ErrorStatus	FlexCAN Module Error and Status.
kStatus_FLEXCAN_UnHandled	UnHadled Interrupt asserted.

enum flexcan_frame_format_t

Enumerator
kFLEXCAN_FrameFormatStandard	Standard frame format attribute.
kFLEXCAN_FrameFormatExtend	Extend frame format attribute.

enum flexcan_frame_type_t

Enumerator
kFLEXCAN_FrameTypeData	Data frame type attribute.
kFLEXCAN_FrameTypeRemote	Remote frame type attribute.

enum flexcan_clock_source_t

Enumerator
kFLEXCAN_ClkSrcOsc	FlexCAN Protocol Engine clock from Oscillator.
kFLEXCAN_ClkSrcPeri	FlexCAN Protocol Engine clock from Peripheral Clock.

enum flexcan_rx_fifo_filter_type_t

Enumerator
kFLEXCAN_RxFifoFilterTypeA	One full ID (standard and extended) per ID Filter element.
kFLEXCAN_RxFifoFilterTypeB	Two full standard IDs or two partial 14-bit ID slices per ID Filter Table element.
kFLEXCAN_RxFifoFilterTypeC	Four partial 8-bit Standard or extended ID slices per ID Filter Table element.
kFLEXCAN_RxFifoFilterTypeD	All frames rejected.

enum flexcan_rx_fifo_priority_t

The matching process starts from the Rx MB(or Rx FIFO) with higher priority. If no MB(or Rx FIFO filter) is satisfied, the matching process goes on with the Rx FIFO(or Rx MB) with lower priority.

Enumerator
kFLEXCAN_RxFifoPrioLow	Matching process start from Rx Message Buffer first.
kFLEXCAN_RxFifoPrioHigh	Matching process start from Rx FIFO first.

enum _flexcan_interrupt_enable

This structure contains the settings for all of the FlexCAN Module interrupt configurations. Note: FlexCAN Message Buffers and Rx FIFO have their own interrupts.

Enumerator
kFLEXCAN_BusOffInterruptEnable	Bus Off interrupt.
kFLEXCAN_ErrorInterruptEnable	Error interrupt.
kFLEXCAN_RxWarningInterruptEnable	Rx Warning interrupt.
kFLEXCAN_TxWarningInterruptEnable	Tx Warning interrupt.
kFLEXCAN_WakeUpInterruptEnable	Wake Up interrupt.

enum _flexcan_flags

This provides constants for the FlexCAN status flags for use in the FlexCAN functions. Note: The CPU read action clears FlEXCAN_ErrorFlag, therefore user need to read FlEXCAN_ErrorFlag and distinguish which error is occur using _flexcan_error_flags enumerations.

Enumerator
kFLEXCAN_SynchFlag	CAN Synchronization Status.
kFLEXCAN_TxWarningIntFlag	Tx Warning Interrupt Flag.
kFLEXCAN_RxWarningIntFlag	Rx Warning Interrupt Flag.
kFLEXCAN_TxErrorWarningFlag	Tx Error Warning Status.
kFLEXCAN_RxErrorWarningFlag	Rx Error Warning Status.
kFLEXCAN_IdleFlag	CAN IDLE Status Flag.
kFLEXCAN_FaultConfinementFlag	Fault Confinement State Flag.
kFLEXCAN_TransmittingFlag	FlexCAN In Transmission Status.
kFLEXCAN_ReceivingFlag	FlexCAN In Reception Status.
kFLEXCAN_BusOffIntFlag	Bus Off Interrupt Flag.
kFLEXCAN_ErrorIntFlag	Error Interrupt Flag.
kFLEXCAN_WakeUpIntFlag	Wake-Up Interrupt Flag.
kFLEXCAN_ErrorFlag	All FlexCAN Error Status.

enum _flexcan_error_flags

The FlexCAN Error Status enumerations is used to report current error of the FlexCAN bus. This enumerations should be used with KFLEXCAN_ErrorFlag in _flexcan_flags enumerations to ditermine which error is generated.

Enumerator
kFLEXCAN_StuffingError	Stuffing Error.
kFLEXCAN_FormError	Form Error.
kFLEXCAN_CrcError	Cyclic Redundancy Check Error.
kFLEXCAN_AckError	Received no ACK on transmission.
kFLEXCAN_Bit0Error	Unable to send dominant bit.
kFLEXCAN_Bit1Error	Unable to send recessive bit.

enum _flexcan_rx_fifo_flags

The FlexCAN Rx FIFO Status enumerations are used to determine the status of the Rx FIFO. Because Rx FIFO occupy the MB0 ~ MB7 (Rx Fifo filter also occupies more Message Buffer space), Rx FIFO status flags are mapped to the corresponding Message Buffer status flags.

Enumerator
kFLEXCAN_RxFifoOverflowFlag	Rx FIFO overflow flag.
kFLEXCAN_RxFifoWarningFlag	Rx FIFO almost full flag.
kFLEXCAN_RxFifoFrameAvlFlag	Frames available in Rx FIFO flag.

Function Documentation

void FLEXCAN_Init	(	CAN_Type *	base,
		const flexcan_config_t *	config,
		uint32_t	sourceClock_Hz
	)

This function initializes the FlexCAN module with user-defined settings. This example shows how to set up the flexcan_config_t parameters and how to call the FLEXCAN_Init function by passing in these parameters:

flexcan_config_t flexcanConfig;
flexcanConfig.clkSrc            = KFLEXCAN_ClkSrcOsc;
flexcanConfig.baudRate          = 125000U;
flexcanConfig.maxMbNum          = 16;
flexcanConfig.enableLoopBack    = false;
flexcanConfig.enableSelfWakeup  = false;
flexcanConfig.enableIndividMask = false;
flexcanConfig.enableDoze        = false;
FLEXCAN_Init(CAN0, &flexcanConfig, 8000000UL);

Parameters

base	FlexCAN peripheral base address.
config	Pointer to user-defined configuration structure.
sourceClock_Hz	FlexCAN Protocol Engine clock source frequency in Hz.

void FLEXCAN_Deinit ( CAN_Type * base )

This function disable the FlexCAN module clock and set all register value to reset value.

Parameters

base	FlexCAN peripheral base address.

void FLEXCAN_GetDefaultConfig ( flexcan_config_t * config )

This function initializes the FlexCAN configure structure to default value. The default value are: flexcanConfig->clkSrc = KFLEXCAN_ClkSrcOsc; flexcanConfig->baudRate = 125000U; flexcanConfig->maxMbNum = 16; flexcanConfig->enableLoopBack = false; flexcanConfig->enableSelfWakeup = false; flexcanConfig->enableIndividMask = false; flexcanConfig->enableDoze = false;

Parameters

config Pointer to FlexCAN configuration structure.

void FLEXCAN_SetTimingConfig	(	CAN_Type *	base,
		const flexcan_timing_config_t *	config
	)

This function gives user settings to CAN bus timing characteristic. The function is for an experienced user. For less experienced users, call the FLEXCAN_Init() and fill the baud rate field with a desired value. This provides the default timing characteristics to the module.

Note that calling FLEXCAN_SetTimingConfig() overrides the baud rate set in FLEXCAN_Init().

Parameters

base	FlexCAN peripheral base address.
config	Pointer to the timing configuration structure.

void FlEXCAN_SetRxMbGlobalMask	(	CAN_Type *	base,
		uint32_t	mask
	)

This function sets the global mask for FlexCAN message buffer in a matching process. The configuration is only effective when the Rx individual mask is disabled in the FLEXCAN_Init().

Parameters

base	FlexCAN peripheral base address.
mask	Rx Message Buffer Global Mask value.

void FlEXCAN_SetRxFifoGlobalMask	(	CAN_Type *	base,
		uint32_t	mask
	)

This function sets the global mask for FlexCAN FIFO in a matching process.

Parameters

base	FlexCAN peripheral base address.
mask	Rx Fifo Global Mask value.

void FlEXCAN_SetRxIndividualMask	(	CAN_Type *	base,
		uint8_t	maskIdx,
		uint32_t	mask
	)

This function sets the individual mask for FlexCAN matching process. The configuration is only effective when the Rx individual mask is enabled in FLEXCAN_Init(). If Rx FIFO is disabled, the individual mask is applied to the corresponding Message Buffer. If Rx FIFO is enabled, the individual mask for Rx FIFO occupied Message Buffer is applied to the Rx Filter with same index. What calls for special attention is that only the first 32 individual masks can be used as Rx FIFO filter mask.

Parameters

base	FlexCAN peripheral base address.
maskIdx	The Index of individual Mask.
mask	Rx Individual Mask value.

void FLEXCAN_SetTxMbConfig	(	CAN_Type *	base,
		uint8_t	mbIdx,
		bool	enable
	)

This function aborts the previous transmission, cleans the Message Buffer, and configures it as a Transmit Message Buffer.

Parameters

base	FlexCAN peripheral base address.
mbIdx	The Message Buffer index.
enable	Enable/Disable Tx Message Buffer. true: Enable Tx Message Buffer. false: Disable Tx Message Buffer.

void FLEXCAN_SetRxMbConfig	(	CAN_Type *	base,
		uint8_t	mbIdx,
		const flexcan_rx_mb_config_t *	config,
		bool	enable
	)

This function cleans a FlexCAN build-in Message Buffer and configures it as a Receive Message Buffer.

Parameters

base	FlexCAN peripheral base address.
mbIdx	The Message Buffer index.
config	Pointer to FlexCAN Message Buffer configuration structure.
enable	Enable/Disable Rx Message Buffer. true: Enable Rx Message Buffer. false: Disable Rx Message Buffer.

void FlEXCAN_SetRxFifoConfig	(	CAN_Type *	base,
		const flexcan_rx_fifo_config_t *	config,
		bool	enable
	)

This function configures the Rx FIFO with given Rx FIFO configuration.

Parameters

base	FlexCAN peripheral base address.
config	Pointer to FlexCAN Rx FIFO configuration structure.
enable	Enable/Disable Rx FIFO. true: Enable Rx FIFO. false: Disable Rx FIFO.

static uint32_t FLEXCAN_GetStatusFlags ( CAN_Type * base )

inlinestatic

This function gets all FlexCAN status flags. The flags are returned as the logical OR value of the enumerators _flexcan_flags. To check the specific status, compare the return value with enumerators in _flexcan_flags.

Parameters

base	FlexCAN peripheral base address.

Returns: FlexCAN status flags which are ORed by the enumerators in the _flexcan_flags.

static void FLEXCAN_ClearStatusFlags	(	CAN_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function clears the FlexCAN status flags with a provided mask. An automatically cleared flag can't be cleared by this function.

Parameters

base	FlexCAN peripheral base address.
mask	The status flags to be cleared, it is logical OR value of _flexcan_flags.

static void FlEXCAN_GetBusErrCount	(	CAN_Type *	base,
		uint8_t *	txErrBuf,
		uint8_t *	rxErrBuf
	)

inlinestatic

This function gets the FlexCAN Bus Error Counter value for both Tx and Rx direction. These values may be needed in the upper layer error handling.

Parameters

base	FlexCAN peripheral base address.
txErrBuf	Buffer to store Tx Error Counter value.
rxErrBuf	Buffer to store Rx Error Counter value.

static uint32_t FLEXCAN_GetMbStatusFlags	(	CAN_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function gets the interrupt flags of a given Message Buffers.

Parameters

base	FlexCAN peripheral base address.
mask	The ORed FlexCAN Message Buffer mask.

Returns: The status of given Message Buffers.

static void FLEXCAN_ClearMbStatusFlags	(	CAN_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function clears the interrupt flags of a given Message Buffers.

Parameters

base	FlexCAN peripheral base address.
mask	The ORed FlexCAN Message Buffer mask.

static void FLEXCAN_EnableInterrupts	(	CAN_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function enables the FlexCAN interrupts according to provided mask. The mask is a logical OR of enumeration members, see _flexcan_interrupt_enable.

Parameters

base	FlexCAN peripheral base address.
mask	The interrupts to enable. Logical OR of _flexcan_interrupt_enable.

static void FLEXCAN_DisableInterrupts	(	CAN_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function disables the FlexCAN interrupts according to provided mask. The mask is a logical OR of enumeration members, see _flexcan_interrupt_enable.

Parameters

base	FlexCAN peripheral base address.
mask	The interrupts to disable. Logical OR of _flexcan_interrupt_enable.

static void FLEXCAN_EnableMbInterrupts	(	CAN_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function enables the interrupts of given Message Buffers

Parameters

base	FlexCAN peripheral base address.
mask	The ORed FlexCAN Message Buffer mask.

static void FLEXCAN_DisableMbInterrupts	(	CAN_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function disables the interrupts of given Message Buffers

Parameters

base	FlexCAN peripheral base address.
mask	The ORed FlexCAN Message Buffer mask.

static void FLEXCAN_Enable	(	CAN_Type *	base,
		bool	enable
	)

inlinestatic

This function enables or disables the FlexCAN module.

Parameters

base	FlexCAN base pointer.
enable	true to enable, false to disable.

status_t FLEXCAN_WriteTxMb	(	CAN_Type *	base,
		uint8_t	mbIdx,
		const flexcan_frame_t *	txFrame
	)

This function writes a CAN Message to the specified Transmit Message Buffer and changes the Message Buffer state to start CAN Message transmit. After that the function returns immediately.

Parameters

base	FlexCAN peripheral base address.
mbIdx	The FlexCAN Message Buffer index.
txFrame	Pointer to CAN message frame to be sent.

Return values

kStatus_Success	- Write Tx Message Buffer Successfully.
kStatus_Fail	- Tx Message Buffer is currently in use.

status_t FLEXCAN_ReadRxMb	(	CAN_Type *	base,
		uint8_t	mbIdx,
		flexcan_frame_t *	rxFrame
	)

This function reads a CAN message from a specified Receive Message Buffer. The function fills a receive CAN message frame structure with just received data and activates the Message Buffer again. The function returns immediately.

Parameters

base	FlexCAN peripheral base address.
mbIdx	The FlexCAN Message Buffer index.
rxFrame	Pointer to CAN message frame structure for reception.

Return values

kStatus_Success	- Rx Message Buffer is full and has been read successfully.
kStatus_FLEXCAN_RxOverflow	- Rx Message Buffer is already overflowed and has been read successfully.
kStatus_Fail	- Rx Message Buffer is empty.

status_t FlEXCAN_ReadRxFifo	(	CAN_Type *	base,
		flexcan_frame_t *	rxFrame
	)

This function reads a CAN message from the FlexCAN build-in Rx FIFO.

Parameters

base	FlexCAN peripheral base address.
rxFrame	Pointer to CAN message frame structure for reception.

Return values

kStatus_Success	- Read Message from Rx FIFO successfully.
kStatus_Fail	- Rx FIFO is not enabled.

status_t FlEXCAN_TransferSendBlocking	(	CAN_Type *	base,
		uint8_t	mbIdx,
		flexcan_frame_t *	txFrame
	)

Note that a transfer handle does not need to be created before calling this API.

Parameters

base	FlexCAN peripheral base pointer.
mbIdx	The FlexCAN Message Buffer index.
txFrame	Pointer to CAN message frame to be sent.

Return values

kStatus_Success	- Write Tx Message Buffer Successfully.
kStatus_Fail	- Tx Message Buffer is currently in use.

status_t FlEXCAN_TransferReceiveBlocking	(	CAN_Type *	base,
		uint8_t	mbIdx,
		flexcan_frame_t *	rxFrame
	)

Note that a transfer handle does not need to be created before calling this API.

Parameters

base	FlexCAN peripheral base pointer.
mbIdx	The FlexCAN Message Buffer index.
rxFrame	Pointer to CAN message frame structure for reception.

Return values

kStatus_Success	- Rx Message Buffer is full and has been read successfully.
kStatus_FLEXCAN_RxOverflow	- Rx Message Buffer is already overflowed and has been read successfully.
kStatus_Fail	- Rx Message Buffer is empty.

status_t FlEXCAN_TransferReceiveFifoBlocking	(	CAN_Type *	base,
		flexcan_frame_t *	rxFrame
	)

Note that a transfer handle does not need to be created before calling this API.

Parameters

base	FlexCAN peripheral base pointer.
rxFrame	Pointer to CAN message frame structure for reception.

Return values

kStatus_Success	- Read Message from Rx FIFO successfully.
kStatus_Fail	- Rx FIFO is not enabled.

void FLEXCAN_TransferCreateHandle	(	CAN_Type *	base,
		flexcan_handle_t *	handle,
		flexcan_transfer_callback_t	callback,
		void *	userData
	)

This function initializes the FlexCAN handle which can be used for other FlexCAN transactional APIs. Usually, for a specified FlexCAN instance, call this API once to get the initialized handle.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.
callback	The callback function.
userData	The parameter of the callback function.

status_t FLEXCAN_TransferSendNonBlocking	(	CAN_Type *	base,
		flexcan_handle_t *	handle,
		flexcan_mb_transfer_t *	xfer
	)

This function sends a message using IRQ. This is a non-blocking function, which returns right away. When messages have been sent out, the send callback function is called.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.
xfer	FlexCAN Message Buffer transfer structure. See the flexcan_mb_transfer_t.

Return values

kStatus_Success	Start Tx Message Buffer sending process successfully.
kStatus_Fail	Write Tx Message Buffer failed.
kStatus_FLEXCAN_TxBusy	Tx Message Buffer is in use.

status_t FLEXCAN_TransferReceiveNonBlocking	(	CAN_Type *	base,
		flexcan_handle_t *	handle,
		flexcan_mb_transfer_t *	xfer
	)

This function receives a message using IRQ. This is non-blocking function, which returns right away. When the message has been received, the receive callback function is called.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.
xfer	FlexCAN Message Buffer transfer structure. See the flexcan_mb_transfer_t.

Return values

kStatus_Success	- Start Rx Message Buffer receiving process successfully.
kStatus_FLEXCAN_RxBusy	- Rx Message Buffer is in use.

status_t FLEXCAN_TransferReceiveFifoNonBlocking	(	CAN_Type *	base,
		flexcan_handle_t *	handle,
		flexcan_fifo_transfer_t *	xfer
	)

This function receives a message using IRQ. This is a non-blocking function, which returns right away. When all messages have been received, the receive callback function is called.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.
xfer	FlexCAN Rx FIFO transfer structure. See the flexcan_fifo_transfer_t.

Return values

kStatus_Success	- Start Rx FIFO receiving process successfully.
kStatus_FLEXCAN_RxFifoBusy	- Rx FIFO is currently in use.

void FLEXCAN_TransferAbortSend	(	CAN_Type *	base,
		flexcan_handle_t *	handle,
		uint8_t	mbIdx
	)

This function aborts the interrupt driven message send process.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.
mbIdx	The FlexCAN Message Buffer index.

void FLEXCAN_TransferAbortReceive	(	CAN_Type *	base,
		flexcan_handle_t *	handle,
		uint8_t	mbIdx
	)

This function aborts the interrupt driven message receive process.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.
mbIdx	The FlexCAN Message Buffer index.

void FLEXCAN_TransferAbortReceiveFifo	(	CAN_Type *	base,
		flexcan_handle_t *	handle
	)

This function aborts the interrupt driven message receive from Rx FIFO process.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.

void FLEXCAN_TransferHandleIRQ	(	CAN_Type *	base,
		flexcan_handle_t *	handle
	)

This function handles the FlexCAN Error, the Message Buffer, and the Rx FIFO IRQ request.

Parameters

base	FlexCAN peripheral base address.
handle	FlexCAN handle pointer.

Overview

Typical use case

Message Buffer Send Operation

Message Buffer Receive Operation

Receive FIFO Operation

Files

Data Structures

Macros

Typedefs

Enumerations

Driver version

Initialization and deinitialization

Configuration.

Status

Interrupts

Bus Operations

Transactional

Data Structure Documentation

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field 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