Data Structures
struct	XCan_Config
	This typedef contains configuration information for a device. More...

struct	XCan
	The XCan driver instance data. More...

Macros
#define	XCAN_H
	by using protection macros More...

#define	XCan_IsTxDone(InstancePtr)
	This macro checks if the transmission is complete. More...

#define	XCan_IsTxFifoFull(InstancePtr)
	This macro checks if the transmission FIFO is full. More...

#define	XCan_IsHighPriorityBufFull(InstancePtr)
	This macro checks if the Transmission High Priority Buffer is full. More...

#define	XCan_IsRxEmpty(InstancePtr)
	This macro checks if the receive FIFO is empty. More...

#define	XCan_IsAcceptFilterBusy(InstancePtr)
	This macro checks if the CAN device is ready for the driver to change Acceptance Filter Identifier Registers (AFIR) and Acceptance Filter Mask Registers (AFMR). More...

#define	XCan_CreateIdValue(StandardId, SubRemoteTransReq, IdExtension, ExtendedId, RemoteTransReq)
	This macro calculates CAN message identifier value given identifier field values. More...

#define	XCan_CreateDlcValue(DataLengCode) (((DataLengCode) << XCAN_DLCR_DLC_SHIFT) & XCAN_DLCR_DLC_MASK)
	This macro calculates value for Data Length Code register given Data Length Code value. More...

#define	XCAN_L_H
	by using protection macros More...

#define	XCan_ReadReg(BaseAddress, RegOffset) Xil_In32((BaseAddress) + (RegOffset))
	This macro reads the given register. More...

#define	XCan_WriteReg(BaseAddress, RegOffset, Data) Xil_Out32((BaseAddress) + (RegOffset), (Data))
	This macro writes the given register. More...

#define	XCAN_MAX_FRAME_SIZE_IN_WORDS (XCAN_MAX_FRAME_SIZE / sizeof(u32))
	Max Frame Size. More...

#define	TEST_MESSAGE_ID 1024
	Mesage ID. More...

#define	TEST_CAN_DLC 8
	DLC length. More...

Typedefs
typedef void(*	XCan_SendRecvHandler )(void *CallBackRef)
	Callback type for frame sending and reception interrupts. More...

typedef void(*	XCan_ErrorHandler )(void *CallBackRef, u32 ErrorMask)
	Callback type for error interrupt. More...

typedef void(*	XCan_EventHandler )(void *CallBackRef, u32 Mask)
	Callback type for all kinds of interrupts except sending frame interrupt, receiving frame interrupt, and error interrupt. More...

Functions
int	XCan_Initialize (XCan *InstancePtr, u16 DeviceId)
	This routine initializes a specific XCan instance/driver. More...

int	XCan_VmInitialize (XCan *InstancePtr, u16 DeviceId, UINTPTR VirtAddr)
	This routine initializes of a specific XCan instance/driver. More...

void	XCan_Reset (XCan *InstancePtr)
	This function resets the CAN device. More...

u8	XCan_GetMode (XCan *InstancePtr)
	This routine returns current operation mode the CAN device is in. More...

void	XCan_EnterMode (XCan *InstancePtr, u8 OperationMode)
	This function allows the CAN device to enter one of the following operation modes: More...

u32	XCan_GetStatus (XCan *InstancePtr)
	This function returns Status value from Status Register (SR). More...

void	XCan_GetBusErrorCounter (XCan InstancePtr, u8 RxErrorCount, u8 *TxErrorCount)
	This function reads Receive and Transmit error counters. More...

u32	XCan_GetBusErrorStatus (XCan *InstancePtr)
	This function reads Error Status value from Error Status Register (ESR). More...

void	XCan_ClearBusErrorStatus (XCan *InstancePtr, u32 Mask)
	This function clears Error Status bit(s) previously set in Error Status Register (ESR). More...

int	XCan_Send (XCan InstancePtr, u32 FramePtr)
	This function sends a CAN Frame. More...

int	XCan_Recv (XCan InstancePtr, u32 FramePtr)
	This function receives a CAN Frame. More...

int	XCan_SendHighPriority (XCan InstancePtr, u32 FramePtr)
	This routine sends a CAN High Priority frame. More...

void	XCan_AcceptFilterEnable (XCan *InstancePtr, u32 FilterIndexes)
	This routine enables individual acceptance filters. More...

void	XCan_AcceptFilterDisable (XCan *InstancePtr, u32 FilterIndexes)
	This routine disables individual acceptance filters. More...

u32	XCan_AcceptFilterGetEnabled (XCan *InstancePtr)
	This function returns enabled acceptance filters. More...

int	XCan_AcceptFilterSet (XCan *InstancePtr, u32 FilterIndex, u32 MaskValue, u32 IdValue)
	This function sets values to the Acceptance Filter Mask Register (AFMR) and Acceptance Filter ID Register (AFIR) for the specified Acceptance Filter. More...

void	XCan_AcceptFilterGet (XCan InstancePtr, u32 FilterIndex, u32 MaskValue, u32 *IdValue)
	This function reads the values of the Acceptance Filter Mask and ID Register for the specified Acceptance Filter. More...

XCan_Config *	XCan_LookupConfig (u16 DeviceId)
	This function looks for the device configuration based on the unique device ID. More...

XCan_Config *	XCan_GetConfig (unsigned int InstanceIndex)
	This function looks for the device configuration based on the device index. More...

int	XCan_SetBaudRatePrescaler (XCan *InstancePtr, u8 Prescaler)
	This routine sets Baud Rate Prescaler value. More...

u8	XCan_GetBaudRatePrescaler (XCan *InstancePtr)
	This routine gets Baud Rate Prescaler value. More...

int	XCan_SetBitTiming (XCan *InstancePtr, u8 SyncJumpWidth, u8 TimeSegment2, u8 TimeSegment1)
	This routine sets Bit time. More...

void	XCan_GetBitTiming (XCan InstancePtr, u8 SyncJumpWidth, u8 TimeSegment2, u8 TimeSegment1)
	This routine gets Bit time. More...

int	XCan_SelfTest (XCan *InstancePtr)
	This function runs a self-test on the CAN driver/device. More...

void	XCan_InterruptEnable (XCan *InstancePtr, u32 Mask)
	This routine enables interrupt(s). More...

void	XCan_InterruptDisable (XCan *InstancePtr, u32 Mask)
	This routine disables interrupt(s). More...

u32	XCan_InterruptGetEnabled (XCan *InstancePtr)
	This routine returns enabled interrupt(s). More...

u32	XCan_InterruptGetStatus (XCan *InstancePtr)
	This routine returns interrupt status read from Interrupt Status Register. More...

void	XCan_InterruptClear (XCan *InstancePtr, u32 Mask)
	This function clears interrupt(s). More...

void	XCan_IntrHandler (void *InstancePtr)
	This routine is the interrupt handler for the CAN driver. More...

int	XCan_SetHandler (XCan InstancePtr, u32 HandlerType, void CallBackFunc, void *CallBackRef)
	This routine installs an asynchronous callback function for the given HandlerType: More...

Variables
XCan_Config	XCan_ConfigTable []
	This table contains configuration information for each CAN device in the system. More...

XCan_Config	XCan_ConfigTable [XPAR_XCAN_NUM_INSTANCES]
	This table contains configuration information for each CAN device in the system. More...

CAN operation modes
#define	XCAN_MODE_CONFIG 0x00000001
	Configuration mode. More...

#define	XCAN_MODE_NORMAL 0x00000002
	Normal mode. More...

#define	XCAN_MODE_LOOPBACK 0x00000004
	Loop Back mode. More...

#define	XCAN_MODE_SLEEP 0x00000008
	Sleep mode. More...

Callback identifiers used as parameters to XCan_SetHandler()
#define	XCAN_HANDLER_SEND 1
	Handler type for frame sending interrupt. More...

#define	XCAN_HANDLER_RECV 2
	Handler type for frame reception interrupt. More...

#define	XCAN_HANDLER_ERROR 3
	Handler type for error interrupt. More...

#define	XCAN_HANDLER_EVENT 4
	Handler type for all other interrupts. More...

Register offsets for the CAN. Each register is 32 bits.
#define	XCAN_SRR_OFFSET 0x000
	Software Reset Register. More...

#define	XCAN_MSR_OFFSET 0x004
	Mode Select Register. More...

#define	XCAN_BRPR_OFFSET 0x008
	Baud Rate Prescaler Register. More...

#define	XCAN_BTR_OFFSET 0x00C
	Bit Timing Register. More...

#define	XCAN_ECR_OFFSET 0x010
	Error Counter Register. More...

#define	XCAN_ESR_OFFSET 0x014
	Error Status Register. More...

#define	XCAN_SR_OFFSET 0x018
	Status Register. More...

#define	XCAN_ISR_OFFSET 0x01C
	Interrupt Status Register. More...

#define	XCAN_IER_OFFSET 0x020
	Interrupt Enable Register. More...

#define	XCAN_ICR_OFFSET 0x024
	Interrupt Clear Register. More...

#define	XCAN_TXFIFO_ID_OFFSET 0x030
	TX FIFO ID. More...

#define	XCAN_TXFIFO_DLC_OFFSET 0x034
	TX FIFO DLC. More...

#define	XCAN_TXFIFO_DW1_OFFSET 0x038
	TX FIFO Data Word 1. More...

#define	XCAN_TXFIFO_DW2_OFFSET 0x03C
	TX FIFO Data Word 2. More...

#define	XCAN_TXBUF_ID_OFFSET 0x040
	TX High Priority Buffer ID. More...

#define	XCAN_TXBUF_DLC_OFFSET 0x044
	TX High Priority Buffer DLC. More...

#define	XCAN_TXBUF_DW1_OFFSET 0x048
	TX High Priority Buf Data Word 1. More...

#define	XCAN_TXBUF_DW2_OFFSET 0x04C
	TX High Priority Buf Data Word 2. More...

#define	XCAN_RXFIFO_ID_OFFSET 0x050
	RX FIFO ID. More...

#define	XCAN_RXFIFO_DLC_OFFSET 0x054
	RX FIFO DLC. More...

#define	XCAN_RXFIFO_DW1_OFFSET 0x058
	RX FIFO Data Word 1. More...

#define	XCAN_RXFIFO_DW2_OFFSET 0x05C
	RX FIFO Data Word 2. More...

#define	XCAN_AFR_OFFSET 0x060
	Acceptance Filter Register. More...

#define	XCAN_AFMR1_OFFSET 0x064
	Acceptance Filter Mask Register 1. More...

#define	XCAN_AFIR1_OFFSET 0x068
	Acceptance Filter ID Register 1. More...

#define	XCAN_AFMR2_OFFSET 0x06C
	Acceptance Filter Mask Register 2. More...

#define	XCAN_AFIR2_OFFSET 0x070
	Acceptance Filter ID Register 2. More...

#define	XCAN_AFMR3_OFFSET 0x074
	Acceptance Filter Mask Register 3. More...

#define	XCAN_AFIR3_OFFSET 0x078
	Acceptance Filter ID Register 3. More...

#define	XCAN_AFMR4_OFFSET 0x07C
	Acceptance Filter Mask Register 4. More...

#define	XCAN_AFIR4_OFFSET 0x080
	Acceptance Filter ID Register 4. More...

Software Reset Register
#define	XCAN_SRR_CEN_MASK 0x00000002
	Can Enable Mask. More...

#define	XCAN_SRR_SRST_MASK 0x00000001
	Reset Mask. More...

Mode Select Register
#define	XCAN_MSR_LBACK_MASK 0x00000002
	Loop Back Mode Select Mask. More...

#define	XCAN_MSR_SLEEP_MASK 0x00000001
	Sleep Mode Select Mask. More...

Baud Rate Prescaler register
#define	XCAN_BRPR_BRP_MASK 0x000000FF
	Baud Rate Prescaler Mask. More...

Bit Timing Register
#define	XCAN_BTR_SJW_MASK 0x00000180
	Sync Jump Width Mask. More...

#define	XCAN_BTR_SJW_SHIFT 7
	Sync Jump Width Shift. More...

#define	XCAN_BTR_TS2_MASK 0x00000070
	Time Segment 2 Mask. More...

#define	XCAN_BTR_TS2_SHIFT 4
	Time Segment 2 Shift. More...

#define	XCAN_BTR_TS1_MASK 0x0000000F
	Time Segment 1 Mask. More...

Error Counter Register
#define	XCAN_ECR_REC_MASK 0x0000FF00
	Receive Error Counter Mask. More...

#define	XCAN_ECR_REC_SHIFT 8
	Receive Error Counter Shift. More...

#define	XCAN_ECR_TEC_MASK 0x000000FF
	Transmit Error Counter Mask. More...

Error Status Register
#define	XCAN_ESR_ACKER_MASK 0x00000010
	ACK Error Mask. More...

#define	XCAN_ESR_BERR_MASK 0x00000008
	Bit Error Mask. More...

#define	XCAN_ESR_STER_MASK 0x00000004
	Stuff Error Mask. More...

#define	XCAN_ESR_FMER_MASK 0x00000002
	Form Error Mask. More...

#define	XCAN_ESR_CRCER_MASK 0x00000001
	CRC Error Mask. More...

Status Register
#define	XCAN_SR_ACFBSY_MASK 0x00000800
	Acceptance Filter busy Mask. More...

#define	XCAN_SR_TXFLL_MASK 0x00000400
	TX FIFO is full Mask. More...

#define	XCAN_SR_TXBFLL_MASK 0x00000200
	TX High Priority Buffer full. More...

#define	XCAN_SR_ESTAT_MASK 0x00000180
	Error Status Mask. More...

#define	XCAN_SR_ESTAT_SHIFT 7
	Error Status Shift. More...

#define	XCAN_SR_ERRWRN_MASK 0x00000040
	Error Warning Mask. More...

#define	XCAN_SR_BBSY_MASK 0x00000020
	Bus Busy Mask. More...

#define	XCAN_SR_BIDLE_MASK 0x00000010
	Bus Idle Mask. More...

#define	XCAN_SR_NORMAL_MASK 0x00000008
	Normal Mode Mask. More...

#define	XCAN_SR_SLEEP_MASK 0x00000004
	Sleep Mode Mask. More...

#define	XCAN_SR_LBACK_MASK 0x00000002
	Loop Back Mode Mask. More...

#define	XCAN_SR_CONFIG_MASK 0x00000001
	Configuration Mode Mask. More...

Interrupt Status/Enable/Clear Register
#define	XCAN_IXR_WKUP_MASK 0x00000800
	Wake up Interrupt Mask. More...

#define	XCAN_IXR_SLP_MASK 0x00000400
	Sleep Interrupt Mask. More...

#define	XCAN_IXR_BSOFF_MASK 0x00000200
	Bus Off Interrupt Mask. More...

#define	XCAN_IXR_ERROR_MASK 0x00000100
	Error Interrupt Mask. More...

#define	XCAN_IXR_RXNEMP_MASK 0x00000080
	RX FIFO Not Empty Intr Mask. More...

#define	XCAN_IXR_RXOFLW_MASK 0x00000040
	RX FIFO Overflow Intr Mask. More...

#define	XCAN_IXR_RXUFLW_MASK 0x00000020
	RX FIFO Underflow Intr Mask. More...

#define	XCAN_IXR_RXOK_MASK 0x00000010
	New Message Received Intr. More...

#define	XCAN_IXR_TXBFLL_MASK 0x00000008
	TX High Priority Buf Full. More...

#define	XCAN_IXR_TXFLL_MASK 0x00000004
	TX FIFO Full Interrupt Mask. More...

#define	XCAN_IXR_TXOK_MASK 0x00000002
	TX Successful Interrupt Mask. More...

#define	XCAN_IXR_ARBLST_MASK 0x00000001
	Arbitration Lost Intr Mask. More...

#define	XCAN_IXR_ALL
	Mask for basic interrupts. More...

CAN Frame Identifier (TX High Priority Buffer/TX/RX/Acceptance Filter
Mask/Acceptance Filter ID)
#define	XCAN_IDR_ID1_MASK 0xFFE00000
	Standard Messg Ident Mask. More...

#define	XCAN_IDR_ID1_SHIFT 21
	Standard Messg Ident Shift. More...

#define	XCAN_IDR_SRR_MASK 0x00100000
	Substitute Remote TX Req. More...

#define	XCAN_IDR_SRR_SHIFT 20
	Shift Value for SRR. More...

#define	XCAN_IDR_IDE_MASK 0x00080000
	Identifier Extension Mask. More...

#define	XCAN_IDR_IDE_SHIFT 19
	Identifier Extension Shift. More...

#define	XCAN_IDR_ID2_MASK 0x0007FFFE
	Extended Message Ident Mask. More...

#define	XCAN_IDR_ID2_SHIFT 1
	Extended Message Ident Shift. More...

#define	XCAN_IDR_RTR_MASK 0x00000001
	Remote TX Request Mask. More...

CAN Frame Data Length Code (TX High Priority Buffer/TX/RX)
#define	XCAN_DLCR_DLC_MASK 0xF0000000
	Data Length Code Mask. More...

#define	XCAN_DLCR_DLC_SHIFT 28
	Data Length Code Shift. More...

CAN Frame Data Word 1 (TX High Priority Buffer/TX/RX)
#define	XCAN_DW1R_DB0_MASK 0xFF000000
	Data Byte 0 Mask. More...

#define	XCAN_DW1R_DB0_SHIFT 24
	Data Byte 0 Shift. More...

#define	XCAN_DW1R_DB1_MASK 0x00FF0000
	Data Byte 1 Mask. More...

#define	XCAN_DW1R_DB1_SHIFT 16
	Data Byte 1 Shift. More...

#define	XCAN_DW1R_DB2_MASK 0x0000FF00
	Data Byte 2 Mask. More...

#define	XCAN_DW1R_DB2_SHIFT 8
	Data Byte 2 Shift. More...

#define	XCAN_DW1R_DB3_MASK 0x000000FF
	Data Byte 3 Mask. More...

CAN Frame Data Word 2 (TX High Priority Buffer/TX/RX)
#define	XCAN_DW2R_DB4_MASK 0xFF000000
	Data Byte 4 Mask. More...

#define	XCAN_DW2R_DB4_SHIFT 24
	Data Byte 4 Shift. More...

#define	XCAN_DW2R_DB5_MASK 0x00FF0000
	Data Byte 5 Mask. More...

#define	XCAN_DW2R_DB5_SHIFT 16
	Data Byte 5 Shift. More...

#define	XCAN_DW2R_DB6_MASK 0x0000FF00
	Data Byte 6 Mask. More...

#define	XCAN_DW2R_DB6_SHIFT 8
	Data Byte 6 Shift. More...

#define	XCAN_DW2R_DB7_MASK 0x000000FF
	Data Byte 7. More...

Acceptance Filter Register
#define	XCAN_AFR_UAF4_MASK 0x00000008
	Use Acceptance Filter No.4. More...

#define	XCAN_AFR_UAF3_MASK 0x00000004
	Use Acceptance Filter No.3. More...

#define	XCAN_AFR_UAF2_MASK 0x00000002
	Use Acceptance Filter No.2. More...

#define	XCAN_AFR_UAF1_MASK 0x00000001
	Use Acceptance Filter No.1. More...

#define	XCAN_AFR_UAF_ALL_MASK
	Mask for Acceptance Filters. More...

CAN frame length constants
#define	XCAN_MAX_FRAME_SIZE 16
	Maximum CAN frame length in bytes. More...

Macro Definition Documentation

#define TEST_CAN_DLC 8

DLC length.

Referenced by XCan_SelfTest().

#define TEST_MESSAGE_ID 1024

Mesage ID.

Referenced by main(), and XCan_SelfTest().

#define XCAN_AFIR1_OFFSET 0x068

Acceptance Filter ID Register 1.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFIR2_OFFSET 0x070

Acceptance Filter ID Register 2.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFIR3_OFFSET 0x078

Acceptance Filter ID Register 3.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFIR4_OFFSET 0x080

Acceptance Filter ID Register 4.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFMR1_OFFSET 0x064

Acceptance Filter Mask Register 1.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFMR2_OFFSET 0x06C

Acceptance Filter Mask Register 2.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFMR3_OFFSET 0x074

Acceptance Filter Mask Register 3.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFMR4_OFFSET 0x07C

Acceptance Filter Mask Register 4.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFR_OFFSET 0x060

Acceptance Filter Register.

Referenced by XCan_AcceptFilterDisable(), XCan_AcceptFilterEnable(), and XCan_AcceptFilterGetEnabled().

#define XCAN_AFR_UAF1_MASK 0x00000001

Use Acceptance Filter No.1.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFR_UAF2_MASK 0x00000002

Use Acceptance Filter No.2.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFR_UAF3_MASK 0x00000004

Use Acceptance Filter No.3.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFR_UAF4_MASK 0x00000008

Use Acceptance Filter No.4.

Referenced by XCan_AcceptFilterGet(), and XCan_AcceptFilterSet().

#define XCAN_AFR_UAF_ALL_MASK

Value:

(XCAN_AFR_UAF4_MASK | XCAN_AFR_UAF3_MASK | \

XCAN_AFR_UAF2_MASK | XCAN_AFR_UAF1_MASK)

XCAN_AFR_UAF2_MASK

#define XCAN_AFR_UAF2_MASK

Use Acceptance Filter No.2.

Definition: xcan_l.h:235

XCAN_AFR_UAF3_MASK

#define XCAN_AFR_UAF3_MASK

Use Acceptance Filter No.3.

Definition: xcan_l.h:234

XCAN_AFR_UAF4_MASK

#define XCAN_AFR_UAF4_MASK

Use Acceptance Filter No.4.

Definition: xcan_l.h:233

XCAN_AFR_UAF1_MASK

#define XCAN_AFR_UAF1_MASK

Use Acceptance Filter No.1.

Definition: xcan_l.h:236

Mask for Acceptance Filters.

Referenced by XCan_AcceptFilterDisable(), and XCan_AcceptFilterEnable().

#define XCAN_BRPR_BRP_MASK 0x000000FF

Baud Rate Prescaler Mask.

#define XCAN_BRPR_OFFSET 0x008

Baud Rate Prescaler Register.

Referenced by XCan_GetBaudRatePrescaler(), and XCan_SetBaudRatePrescaler().

#define XCAN_BTR_OFFSET 0x00C

Bit Timing Register.

Referenced by XCan_GetBitTiming(), and XCan_SetBitTiming().

#define XCAN_BTR_SJW_MASK 0x00000180

Sync Jump Width Mask.

Referenced by XCan_GetBitTiming(), and XCan_SetBitTiming().

#define XCAN_BTR_SJW_SHIFT 7

Sync Jump Width Shift.

Referenced by XCan_GetBitTiming(), and XCan_SetBitTiming().

#define XCAN_BTR_TS1_MASK 0x0000000F

Time Segment 1 Mask.

Referenced by XCan_GetBitTiming(), and XCan_SetBitTiming().

#define XCAN_BTR_TS2_MASK 0x00000070

Time Segment 2 Mask.

Referenced by XCan_GetBitTiming(), and XCan_SetBitTiming().

#define XCAN_BTR_TS2_SHIFT 4

Time Segment 2 Shift.

Referenced by XCan_GetBitTiming(), and XCan_SetBitTiming().

#define XCan_CreateDlcValue ( DataLengCode ) (((DataLengCode) << XCAN_DLCR_DLC_SHIFT) & XCAN_DLCR_DLC_MASK)

This macro calculates value for Data Length Code register given Data Length Code value.

Parameters

DataLengCode indicates Data Length Code value.

Returns: Value that can be assigned to Data Length Code register.

Note

C-Style signature: u32 XCan_CreateDlcValue(u32 DataLengCode);

    Read the CAN specification for meaning of Data Length Code.

Referenced by main(), and XCan_SelfTest().

#define XCan_CreateIdValue	(	StandardId,
		SubRemoteTransReq,
		IdExtension,
		ExtendedId,
		RemoteTransReq
	)

Value:

((((StandardId) << XCAN_IDR_ID1_SHIFT) & XCAN_IDR_ID1_MASK) | \
 (((SubRemoteTransReq) << XCAN_IDR_SRR_SHIFT) & XCAN_IDR_SRR_MASK) | \
 (((IdExtension) << XCAN_IDR_IDE_SHIFT) & XCAN_IDR_IDE_MASK) | \
 (((ExtendedId) << XCAN_IDR_ID2_SHIFT) & XCAN_IDR_ID2_MASK) | \
 ((RemoteTransReq) & XCAN_IDR_RTR_MASK))

This macro calculates CAN message identifier value given identifier field values.

Parameters

StandardId	contains Standard Message ID value.
SubRemoteTransReq	contains Substitute Remote Transmission Request value.
IdExtension	contains Identifier Extension value.
ExtendedId	contains Extended Message ID value.
RemoteTransReq	contains Remote Transmission Request value.

Returns: Message Identifier value.

Note: C-Style signature: u32 XCan_CreateIdValue(u32 StandardId, u32 SubRemoteTransReq, u32 IdExtension, u32 ExtendedId, u32 RemoteTransReq);

Read the CAN specification for meaning of each parameter.

Referenced by main(), and XCan_SelfTest().

#define XCAN_DLCR_DLC_MASK 0xF0000000

Data Length Code Mask.

#define XCAN_DLCR_DLC_SHIFT 28

Data Length Code Shift.

#define XCAN_DW1R_DB0_MASK 0xFF000000

Data Byte 0 Mask.

#define XCAN_DW1R_DB0_SHIFT 24

Data Byte 0 Shift.

#define XCAN_DW1R_DB1_MASK 0x00FF0000

Data Byte 1 Mask.

#define XCAN_DW1R_DB1_SHIFT 16

Data Byte 1 Shift.

#define XCAN_DW1R_DB2_MASK 0x0000FF00

Data Byte 2 Mask.

#define XCAN_DW1R_DB2_SHIFT 8

Data Byte 2 Shift.

#define XCAN_DW1R_DB3_MASK 0x000000FF

Data Byte 3 Mask.

#define XCAN_DW2R_DB4_MASK 0xFF000000

Data Byte 4 Mask.

#define XCAN_DW2R_DB4_SHIFT 24

Data Byte 4 Shift.

#define XCAN_DW2R_DB5_MASK 0x00FF0000

Data Byte 5 Mask.

#define XCAN_DW2R_DB5_SHIFT 16

Data Byte 5 Shift.

#define XCAN_DW2R_DB6_MASK 0x0000FF00

Data Byte 6 Mask.

#define XCAN_DW2R_DB6_SHIFT 8

Data Byte 6 Shift.

#define XCAN_DW2R_DB7_MASK 0x000000FF

Data Byte 7.

#define XCAN_ECR_OFFSET 0x010

Error Counter Register.

Referenced by XCan_GetBusErrorCounter().

#define XCAN_ECR_REC_MASK 0x0000FF00

Receive Error Counter Mask.

Referenced by XCan_GetBusErrorCounter().

#define XCAN_ECR_REC_SHIFT 8

Receive Error Counter Shift.

Referenced by XCan_GetBusErrorCounter().

#define XCAN_ECR_TEC_MASK 0x000000FF

Transmit Error Counter Mask.

Referenced by XCan_GetBusErrorCounter().

#define XCAN_ESR_ACKER_MASK 0x00000010

ACK Error Mask.

Referenced by main().

#define XCAN_ESR_BERR_MASK 0x00000008

Bit Error Mask.

Referenced by main().

#define XCAN_ESR_CRCER_MASK 0x00000001

CRC Error Mask.

Referenced by main().

#define XCAN_ESR_FMER_MASK 0x00000002

Form Error Mask.

Referenced by main().

#define XCAN_ESR_OFFSET 0x014

Error Status Register.

Referenced by XCan_ClearBusErrorStatus(), and XCan_GetBusErrorStatus().

#define XCAN_ESR_STER_MASK 0x00000004

Stuff Error Mask.

Referenced by main().

#define XCAN_H

by using protection macros

#define XCAN_HANDLER_ERROR 3

Handler type for error interrupt.

Referenced by main(), and XCan_SetHandler().

#define XCAN_HANDLER_EVENT 4

Handler type for all other interrupts.

Referenced by main(), and XCan_SetHandler().

#define XCAN_HANDLER_RECV 2

Handler type for frame reception interrupt.

Referenced by main(), and XCan_SetHandler().

#define XCAN_HANDLER_SEND 1

Handler type for frame sending interrupt.

Referenced by main(), and XCan_SetHandler().

#define XCAN_ICR_OFFSET 0x024

Interrupt Clear Register.

Referenced by XCan_InterruptClear().

#define XCAN_IDR_ID1_MASK 0xFFE00000

Standard Messg Ident Mask.

#define XCAN_IDR_ID1_SHIFT 21

Standard Messg Ident Shift.

#define XCAN_IDR_ID2_MASK 0x0007FFFE

Extended Message Ident Mask.

#define XCAN_IDR_ID2_SHIFT 1

Extended Message Ident Shift.

#define XCAN_IDR_IDE_MASK 0x00080000

Identifier Extension Mask.

#define XCAN_IDR_IDE_SHIFT 19

Identifier Extension Shift.

#define XCAN_IDR_RTR_MASK 0x00000001

Remote TX Request Mask.

#define XCAN_IDR_SRR_MASK 0x00100000

Substitute Remote TX Req.

#define XCAN_IDR_SRR_SHIFT 20

Shift Value for SRR.

#define XCAN_IER_OFFSET 0x020

Interrupt Enable Register.

Referenced by XCan_InterruptDisable(), XCan_InterruptEnable(), and XCan_InterruptGetEnabled().

#define XCan_IsAcceptFilterBusy ( InstancePtr )

Value:

((XCan_ReadReg(((InstancePtr)->BaseAddress), XCAN_SR_OFFSET) & \

XCAN_SR_ACFBSY_MASK) ? TRUE : FALSE)

XCAN_SR_ACFBSY_MASK

#define XCAN_SR_ACFBSY_MASK

Acceptance Filter busy Mask.

Definition: xcan_l.h:140

XCAN_SR_OFFSET

#define XCAN_SR_OFFSET

Status Register.

Definition: xcan_l.h:57

XCan_ReadReg

#define XCan_ReadReg(BaseAddress, RegOffset)

This macro reads the given register.

Definition: xcan_l.h:266

This macro checks if the CAN device is ready for the driver to change Acceptance Filter Identifier Registers (AFIR) and Acceptance Filter Mask Registers (AFMR).

AFIR and AFMR for a filter are changeable only after the filter is disabled and this routine returns FALSE.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns

TRUE if the device is busy and NOT ready to accept writes to AFIR and AFMR.
FALSE if the device is ready to accept writes to AFIR and AFMR.

Note: C-Style signature: int XCan_IsAcceptFilterBusy(XCan *InstancePtr);

Referenced by XCan_AcceptFilterSet().

#define XCan_IsHighPriorityBufFull ( InstancePtr )

Value:

((XCan_ReadReg(((InstancePtr)->BaseAddress), XCAN_SR_OFFSET) & \

XCAN_SR_TXBFLL_MASK) ? TRUE : FALSE)

XCAN_SR_OFFSET

#define XCAN_SR_OFFSET

Status Register.

Definition: xcan_l.h:57

XCan_ReadReg

#define XCan_ReadReg(BaseAddress, RegOffset)

This macro reads the given register.

Definition: xcan_l.h:266

XCAN_SR_TXBFLL_MASK

#define XCAN_SR_TXBFLL_MASK

TX High Priority Buffer full.

Definition: xcan_l.h:142

This macro checks if the Transmission High Priority Buffer is full.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns

TRUE if TX High Priority Buffer is full.
FALSE if TX High Priority Buffer is not full.

Note: C-Style signature: int XCan_IsHighPriorityBufFull(XCan *InstancePtr);

Referenced by XCan_SendHighPriority().

#define XCAN_ISR_OFFSET 0x01C

Interrupt Status Register.

Referenced by XCan_InterruptGetStatus().

#define XCan_IsRxEmpty ( InstancePtr )

Value:

((XCan_ReadReg(((InstancePtr)->BaseAddress), XCAN_ISR_OFFSET) & \

XCAN_IXR_RXNEMP_MASK) ? FALSE : TRUE)

XCAN_IXR_RXNEMP_MASK

#define XCAN_IXR_RXNEMP_MASK

RX FIFO Not Empty Intr Mask.

Definition: xcan_l.h:161

XCan_ReadReg

#define XCan_ReadReg(BaseAddress, RegOffset)

This macro reads the given register.

Definition: xcan_l.h:266

XCAN_ISR_OFFSET

#define XCAN_ISR_OFFSET

Interrupt Status Register.

Definition: xcan_l.h:59

This macro checks if the receive FIFO is empty.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns

TRUE if RX FIFO is empty.
FALSE if RX FIFO is not empty.

Note: C-Style signature: int XCan_IsRxEmpty(XCan *InstancePtr);

Referenced by XCan_Recv(), and XCan_SelfTest().

#define XCan_IsTxDone ( InstancePtr )

Value:

((XCan_ReadReg(((InstancePtr)->BaseAddress), XCAN_ISR_OFFSET) & \

XCAN_IXR_TXOK_MASK) ? TRUE : FALSE)

XCAN_IXR_TXOK_MASK

#define XCAN_IXR_TXOK_MASK

TX Successful Interrupt Mask.

Definition: xcan_l.h:167

XCan_ReadReg

#define XCan_ReadReg(BaseAddress, RegOffset)

This macro reads the given register.

Definition: xcan_l.h:266

XCAN_ISR_OFFSET

#define XCAN_ISR_OFFSET

Interrupt Status Register.

Definition: xcan_l.h:59

This macro checks if the transmission is complete.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns

TRUE if the transmission is done (completed).
FALSE if the transmission is not completed.

Note: C-Style signature: int XCan_IsTxDone(XCan *InstancePtr);

#define XCan_IsTxFifoFull ( InstancePtr )

Value:

((XCan_ReadReg(((InstancePtr)->BaseAddress), XCAN_SR_OFFSET) & \

XCAN_SR_TXFLL_MASK) ? TRUE : FALSE)

XCAN_SR_OFFSET

#define XCAN_SR_OFFSET

Status Register.

Definition: xcan_l.h:57

XCan_ReadReg

#define XCan_ReadReg(BaseAddress, RegOffset)

This macro reads the given register.

Definition: xcan_l.h:266

XCAN_SR_TXFLL_MASK

#define XCAN_SR_TXFLL_MASK

TX FIFO is full Mask.

Definition: xcan_l.h:141

This macro checks if the transmission FIFO is full.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns

TRUE if TX FIFO is full.
FALSE if TX FIFO is not full.

Note: C-Style signature: int XCan_IsTxFifoFull(XCan *InstancePtr);

Referenced by main(), and XCan_Send().

#define XCAN_IXR_ALL

Value:

(XCAN_IXR_WKUP_MASK   | \
				XCAN_IXR_SLP_MASK   | \
				XCAN_IXR_BSOFF_MASK  | \
				XCAN_IXR_ERROR_MASK  | \
				XCAN_IXR_RXNEMP_MASK | \
 				XCAN_IXR_RXOFLW_MASK | \
				XCAN_IXR_RXUFLW_MASK | \
	 			XCAN_IXR_RXOK_MASK   | \
				XCAN_IXR_TXBFLL_MASK | \
				XCAN_IXR_TXFLL_MASK  | \
				XCAN_IXR_TXOK_MASK   | \
				XCAN_IXR_ARBLST_MASK)

Mask for basic interrupts.

Referenced by main(), and XCan_InterruptEnable().

#define XCAN_IXR_ARBLST_MASK 0x00000001

Arbitration Lost Intr Mask.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_IXR_BSOFF_MASK 0x00000200

Bus Off Interrupt Mask.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_IXR_ERROR_MASK 0x00000100

Error Interrupt Mask.

Referenced by XCan_IntrHandler().

#define XCAN_IXR_RXNEMP_MASK 0x00000080

RX FIFO Not Empty Intr Mask.

Referenced by XCan_IntrHandler(), and XCan_Recv().

#define XCAN_IXR_RXOFLW_MASK 0x00000040

RX FIFO Overflow Intr Mask.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_IXR_RXOK_MASK 0x00000010

New Message Received Intr.

#define XCAN_IXR_RXUFLW_MASK 0x00000020

RX FIFO Underflow Intr Mask.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_IXR_SLP_MASK 0x00000400

Sleep Interrupt Mask.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_IXR_TXBFLL_MASK 0x00000008

TX High Priority Buf Full.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_IXR_TXFLL_MASK 0x00000004

TX FIFO Full Interrupt Mask.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_IXR_TXOK_MASK 0x00000002

TX Successful Interrupt Mask.

Referenced by XCan_IntrHandler().

#define XCAN_IXR_WKUP_MASK 0x00000800

Wake up Interrupt Mask.

Referenced by main(), and XCan_IntrHandler().

#define XCAN_L_H

by using protection macros

#define XCAN_MAX_FRAME_SIZE 16

Maximum CAN frame length in bytes.

#define XCAN_MAX_FRAME_SIZE_IN_WORDS (XCAN_MAX_FRAME_SIZE / sizeof(u32))

Max Frame Size.

Referenced by XCan_SelfTest().

#define XCAN_MODE_CONFIG 0x00000001

Configuration mode.

Referenced by main(), XCan_EnterMode(), XCan_GetMode(), XCan_SelfTest(), XCan_SetBaudRatePrescaler(), XCan_SetBitTiming(), and XCanPolledExample().

#define XCAN_MODE_LOOPBACK 0x00000004

Loop Back mode.

Referenced by main(), XCan_EnterMode(), XCan_GetMode(), XCan_SelfTest(), and XCanPolledExample().

#define XCAN_MODE_NORMAL 0x00000002

Normal mode.

Referenced by XCan_EnterMode(), and XCan_GetMode().

#define XCAN_MODE_SLEEP 0x00000008

Sleep mode.

Referenced by XCan_EnterMode(), and XCan_GetMode().

#define XCAN_MSR_LBACK_MASK 0x00000002

Loop Back Mode Select Mask.

Referenced by XCan_EnterMode().

#define XCAN_MSR_OFFSET 0x004

Mode Select Register.

Referenced by XCan_EnterMode().

#define XCAN_MSR_SLEEP_MASK 0x00000001

Sleep Mode Select Mask.

Referenced by XCan_EnterMode().

#define XCan_ReadReg	(	BaseAddress,
		RegOffset
	)	Xil_In32((BaseAddress) + (RegOffset))

This macro reads the given register.

Parameters

BaseAddress	is the base address of the device
RegOffset	is the register offset to be read

Returns: The 32-bit value of the register

Note: C-Style signature: u32 XCan_ReadReg(u32 BaseAddress, u32 RegOffset);

Referenced by XCan_AcceptFilterDisable(), XCan_AcceptFilterEnable(), XCan_AcceptFilterGet(), XCan_AcceptFilterGetEnabled(), XCan_GetBaudRatePrescaler(), XCan_GetBitTiming(), XCan_GetBusErrorCounter(), XCan_GetBusErrorStatus(), XCan_GetStatus(), XCan_InterruptGetEnabled(), XCan_InterruptGetStatus(), and XCan_Recv().

#define XCAN_RXFIFO_DLC_OFFSET 0x054

RX FIFO DLC.

Referenced by XCan_Recv().

#define XCAN_RXFIFO_DW1_OFFSET 0x058

RX FIFO Data Word 1.

Referenced by XCan_Recv().

#define XCAN_RXFIFO_DW2_OFFSET 0x05C

RX FIFO Data Word 2.

Referenced by XCan_Recv().

#define XCAN_RXFIFO_ID_OFFSET 0x050

RX FIFO ID.

Referenced by XCan_Recv().

#define XCAN_SR_ACFBSY_MASK 0x00000800

Acceptance Filter busy Mask.

#define XCAN_SR_BBSY_MASK 0x00000020

Bus Busy Mask.

#define XCAN_SR_BIDLE_MASK 0x00000010

Bus Idle Mask.

#define XCAN_SR_CONFIG_MASK 0x00000001

Configuration Mode Mask.

Referenced by XCan_GetMode().

#define XCAN_SR_ERRWRN_MASK 0x00000040

Error Warning Mask.

#define XCAN_SR_ESTAT_MASK 0x00000180

Error Status Mask.

#define XCAN_SR_ESTAT_SHIFT 7

Error Status Shift.

#define XCAN_SR_LBACK_MASK 0x00000002

Loop Back Mode Mask.

#define XCAN_SR_NORMAL_MASK 0x00000008

Normal Mode Mask.

Referenced by XCan_GetMode().

#define XCAN_SR_OFFSET 0x018

Status Register.

Referenced by XCan_GetStatus().

#define XCAN_SR_SLEEP_MASK 0x00000004

Sleep Mode Mask.

Referenced by XCan_GetMode().

#define XCAN_SR_TXBFLL_MASK 0x00000200

TX High Priority Buffer full.

#define XCAN_SR_TXFLL_MASK 0x00000400

TX FIFO is full Mask.

#define XCAN_SRR_CEN_MASK 0x00000002

Can Enable Mask.

Referenced by XCan_EnterMode().

#define XCAN_SRR_OFFSET 0x000

Software Reset Register.

Referenced by XCan_EnterMode(), and XCan_Reset().

#define XCAN_SRR_SRST_MASK 0x00000001

Reset Mask.

Referenced by XCan_Reset().

#define XCAN_TXBUF_DLC_OFFSET 0x044

TX High Priority Buffer DLC.

Referenced by XCan_SendHighPriority().

#define XCAN_TXBUF_DW1_OFFSET 0x048

TX High Priority Buf Data Word 1.

Referenced by XCan_SendHighPriority().

#define XCAN_TXBUF_DW2_OFFSET 0x04C

TX High Priority Buf Data Word 2.

Referenced by XCan_SendHighPriority().

#define XCAN_TXBUF_ID_OFFSET 0x040

TX High Priority Buffer ID.

Referenced by XCan_SendHighPriority().

#define XCAN_TXFIFO_DLC_OFFSET 0x034

TX FIFO DLC.

Referenced by XCan_Send().

#define XCAN_TXFIFO_DW1_OFFSET 0x038

TX FIFO Data Word 1.

Referenced by XCan_Send().

#define XCAN_TXFIFO_DW2_OFFSET 0x03C

TX FIFO Data Word 2.

Referenced by XCan_Send().

#define XCAN_TXFIFO_ID_OFFSET 0x030

TX FIFO ID.

Referenced by XCan_Send().

#define XCan_WriteReg	(	BaseAddress,
		RegOffset,
		Data
	)	Xil_Out32((BaseAddress) + (RegOffset), (Data))

This macro writes the given register.

Parameters

BaseAddress	is the base address of the device
RegOffset	is the register offset to be written
Data	is the 32-bit value to write to the register

Returns: None.

Note: C-Style signature: u32 XCan_WriteReg(u32 BaseAddress, u32 RegOffset, u32 Data);

Referenced by XCan_AcceptFilterDisable(), XCan_AcceptFilterEnable(), XCan_AcceptFilterSet(), XCan_ClearBusErrorStatus(), XCan_EnterMode(), XCan_InterruptClear(), XCan_InterruptDisable(), XCan_InterruptEnable(), XCan_Reset(), XCan_Send(), XCan_SendHighPriority(), XCan_SetBaudRatePrescaler(), and XCan_SetBitTiming().

Typedef Documentation

typedef void(* XCan_ErrorHandler)(void *CallBackRef, u32 ErrorMask)

Callback type for error interrupt.

Parameters

CallBackRef	is a callback reference passed in by the upper layer when setting the callback functions, and passed back to the upper layer when the callback is invoked.
ErrorMask	is a bit mask indicating the cause of the error. Its value equals 'OR'ing one or more XCAN_ESR_* values defined in xcan_l.h

typedef void(* XCan_EventHandler)(void *CallBackRef, u32 Mask)

Callback type for all kinds of interrupts except sending frame interrupt, receiving frame interrupt, and error interrupt.

Parameters

CallBackRef	is a callback reference passed in by the upper layer when setting the callback functions, and passed back to the upper layer when the callback is invoked.
Mask	is a bit mask indicating the pending interrupts. Its value equals 'OR'ing one or more XCAN_IXR_* defined in xcan_l.h

typedef void(* XCan_SendRecvHandler)(void *CallBackRef)

Callback type for frame sending and reception interrupts.

Parameters

CallBackRef is a callback reference passed in by the upper layer when setting the callback functions, and passed back to the upper layer when the callback is invoked.

Function Documentation

void XCan_AcceptFilterDisable	(	XCan *	InstancePtr,
		u32	FilterIndexes
	)

This routine disables individual acceptance filters.

Up to 4 filters could be disabled. If all acceptance filters are disabled then all received frames are stored in the RX FIFO.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
FilterIndexes	specifies which filter(s) to disable. Use any XCAN_AFR_UAF_MASK to disable one filter, and "Or" multiple XCAN_AFR_UAF_MASK values if multiple filters need to be disabled. Any filter not specified in this parameter will keep its previous enable/disable setting. If all acceptance filters are disabled then all received frames are stored in the RX FIFO.

Returns: None.

Note

Acceptance Filter Register is an optional register in Xilinx CAN device. If it is NOT existing in the device, this function should NOT be used. Calling this function in this case will cause an assertion failure.

References XCan::BaseAddress, XCan::IsReady, XCan::NumOfAcceptFilters, XCAN_AFR_OFFSET, XCAN_AFR_UAF_ALL_MASK, XCan_ReadReg, and XCan_WriteReg.

void XCan_AcceptFilterEnable	(	XCan *	InstancePtr,
		u32	FilterIndexes
	)

This routine enables individual acceptance filters.

Up to 4 filters could be enabled.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
FilterIndexes	specifies which filter(s) to enable. Use any XCAN_AFR_UAF_MASK to enable one filter, and "Or" multiple XCAN_AFR_UAF_MASK values if multiple filters need to be enabled. Any filter not specified in this parameter will keep its previous enable/disable setting.

Returns: None.

Note

Acceptance Filter Register is an optional register in Xilinx CAN device. If it is NOT existing in the device, this function should NOT be used. Calling this function in this case will cause an assertion failure.

References XCan::BaseAddress, XCan::IsReady, XCan::NumOfAcceptFilters, XCAN_AFR_OFFSET, XCAN_AFR_UAF_ALL_MASK, XCan_ReadReg, and XCan_WriteReg.

void XCan_AcceptFilterGet	(	XCan *	InstancePtr,
		u32	FilterIndex,
		u32 *	MaskValue,
		u32 *	IdValue
	)

This function reads the values of the Acceptance Filter Mask and ID Register for the specified Acceptance Filter.

Use XCAN_IDR_* defined in xcan_l.h to interpret the values. Read xcan.h and device specification for details.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
FilterIndex	defines which Acceptance Filter Mask Register to get Mask and ID from. Use any single XCAN_FILTER_* value.
MaskValue	will store the Mask value read from the chosen Acceptance Filter Mask Register after this function returns.
IdValue	will store the ID value read from the chosen Acceptance Filter ID Register after this function returns.

Returns: None.

Note

Acceptance Filter Mask and ID Registers are optional registers in Xilinx CAN device. If they are NOT existing in the device, this function should NOT be used. Calling this function in this case will cause an assertion failure.

References XCan::BaseAddress, XCan::IsReady, XCan::NumOfAcceptFilters, XCAN_AFIR1_OFFSET, XCAN_AFIR2_OFFSET, XCAN_AFIR3_OFFSET, XCAN_AFIR4_OFFSET, XCAN_AFMR1_OFFSET, XCAN_AFMR2_OFFSET, XCAN_AFMR3_OFFSET, XCAN_AFMR4_OFFSET, XCAN_AFR_UAF1_MASK, XCAN_AFR_UAF2_MASK, XCAN_AFR_UAF3_MASK, XCAN_AFR_UAF4_MASK, and XCan_ReadReg.

u32 XCan_AcceptFilterGetEnabled ( XCan * InstancePtr )

This function returns enabled acceptance filters.

Use XCAN_AFR_UAF*_MASK defined in xcan_l.h to interpret the returned value. If no acceptance filters are enabled then all received frames are stored in the RX FIFO.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns: The value stored in Acceptance Filter Register.

Note

Acceptance Filter Register is an optional register in Xilinx CAN device. If it is NOT existing in the device, this function should NOT be used. Calling this function in this case will cause an assertion failure.

References XCan::BaseAddress, XCan::IsReady, XCan::NumOfAcceptFilters, XCAN_AFR_OFFSET, and XCan_ReadReg.

Referenced by XCan_AcceptFilterSet().

int XCan_AcceptFilterSet	(	XCan *	InstancePtr,
		u32	FilterIndex,
		u32	MaskValue,
		u32	IdValue
	)

This function sets values to the Acceptance Filter Mask Register (AFMR) and Acceptance Filter ID Register (AFIR) for the specified Acceptance Filter.

Use XCAN_IDR_* defined in xcan_l.h to create the values to set the filter. Read xcan.h and device specification for details.

This function should be called only after:

The given filter is disabled by calling XCan_AcceptFilterDisable();
And the CAN device is ready to accept writes to AFMR and AFIR, i.e., XCan_IsAcceptFilterBusy() returns FALSE.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
FilterIndex	defines which Acceptance Filter Mask and ID Register to set. Use any single XCAN_AFR_UAF*_MASK value.
MaskValue	is the value to write to the chosen Acceptance Filter Mask Register.
IdValue	is the value to write to the chosen Acceptance Filter ID Register.

Returns

XST_SUCCESS if the values were set successfully.
XST_FAILURE if the given filter was not disabled, or the CAN device was not ready to accept writes to AFMR and AFIR.

Note

Acceptance Filter Mask and ID Registers are optional registers in Xilinx CAN device. If they are NOT existing in the device, this function should NOT be used. Calling this function in this case will cause an assertion failure.

References XCan::BaseAddress, XCan::IsReady, XCan::NumOfAcceptFilters, XCan_AcceptFilterGetEnabled(), XCAN_AFIR1_OFFSET, XCAN_AFIR2_OFFSET, XCAN_AFIR3_OFFSET, XCAN_AFIR4_OFFSET, XCAN_AFMR1_OFFSET, XCAN_AFMR2_OFFSET, XCAN_AFMR3_OFFSET, XCAN_AFMR4_OFFSET, XCAN_AFR_UAF1_MASK, XCAN_AFR_UAF2_MASK, XCAN_AFR_UAF3_MASK, XCAN_AFR_UAF4_MASK, XCan_IsAcceptFilterBusy, and XCan_WriteReg.

void XCan_ClearBusErrorStatus	(	XCan *	InstancePtr,
		u32	Mask
	)

This function clears Error Status bit(s) previously set in Error Status Register (ESR).

Use the XCAN_ESR_* constants defined in xcan_l.h to create the value to pass in. If a bit was cleared in Error Status Register before this function is called, it will not be touched.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
Mask	is he 32-bit mask used to clear bits in Error Status Register. Multiple XCAN_ESR_* values could be 'OR'ed to clear multiple bits

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_ESR_OFFSET, and XCan_WriteReg.

Referenced by XCan_IntrHandler().

void XCan_EnterMode	(	XCan *	InstancePtr,
		u8	OperationMode
	)

This function allows the CAN device to enter one of the following operation modes:

Configuration Mode: Pass in parameter XCAN_MODE_CONFIG
Sleep Mode: Pass in parameter XCAN_MODE_SLEEP
Normal Mode: Pass in parameter XCAN_MODE_NORMAL
Loop Back Mode: Pass in parameter XCAN_MODE_LOOPBACK.

Read xcan.h and device specification for detailed description of each operation mode.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
OperationMode	specify which operation mode to enter. Valid value is any of XCAN_MODE_* defined in xcan.h. Please note no multiple modes could be entered at the same time.

Returns: None.

Note

This function does NOT ensure CAN device enters the specified operation mode before returns the control to the caller. The caller is responsible for checking current operation mode using XCan_GetMode().

References XCan::BaseAddress, XCan::IsReady, XCan_GetMode(), XCAN_MODE_CONFIG, XCAN_MODE_LOOPBACK, XCAN_MODE_NORMAL, XCAN_MODE_SLEEP, XCAN_MSR_LBACK_MASK, XCAN_MSR_OFFSET, XCAN_MSR_SLEEP_MASK, XCAN_SRR_CEN_MASK, XCAN_SRR_OFFSET, and XCan_WriteReg.

Referenced by main(), XCan_SelfTest(), and XCanPolledExample().

u8 XCan_GetBaudRatePrescaler ( XCan * InstancePtr )

This routine gets Baud Rate Prescaler value.

The system clock for the CAN controller is divided by (Prescaler + 1) to generate the quantum clock needed for sampling and synchronization. Read the device specification for details.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns: Current used Baud Rate Prescaler value. The value's range is from 0 to 255.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_BRPR_OFFSET, and XCan_ReadReg.

void XCan_GetBitTiming	(	XCan *	InstancePtr,
		u8 *	SyncJumpWidth,
		u8 *	TimeSegment2,
		u8 *	TimeSegment1
	)

This routine gets Bit time.

Time segment 1, Time segment 2 and Synchronization Jump Width values are read in this function. According to device specification, the actual value of each of these fields is one more than the value read. Read the device specification for details.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
SyncJumpWidth	will store the Synchronization Jump Width value after this function returns. Its value ranges from 0 to 3.
TimeSegment2	will store the Time Segment 2 value after this function returns. Its value ranges from 0 to 7.
TimeSegment1	will store the Time Segment 1 value after this function returns. Its value ranges from 0 to 15.

Returns: None.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_BTR_OFFSET, XCAN_BTR_SJW_MASK, XCAN_BTR_SJW_SHIFT, XCAN_BTR_TS1_MASK, XCAN_BTR_TS2_MASK, XCAN_BTR_TS2_SHIFT, and XCan_ReadReg.

void XCan_GetBusErrorCounter	(	XCan *	InstancePtr,
		u8 *	RxErrorCount,
		u8 *	TxErrorCount
	)

This function reads Receive and Transmit error counters.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
RxErrorCount	will contain Receive Error Counter value after this function returns.
TxErrorCount	will contain Transmit Error Counter value after this function returns.

Returns: None.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_ECR_OFFSET, XCAN_ECR_REC_MASK, XCAN_ECR_REC_SHIFT, XCAN_ECR_TEC_MASK, and XCan_ReadReg.

u32 XCan_GetBusErrorStatus ( XCan * InstancePtr )

This function reads Error Status value from Error Status Register (ESR).

Use the XCAN_ESR_* constants defined in xcan_l.h to interpret the returned value.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns: The 32-bit value read from Error Status Register.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_ESR_OFFSET, and XCan_ReadReg.

Referenced by XCan_IntrHandler().

XCan_Config * XCan_GetConfig ( unsigned int InstanceIndex )

This function looks for the device configuration based on the device index.

The table XCan_ConfigTable[] contains the configuration information for each device in the system.

Parameters

InstanceIndex is a 0-based integer indexing all CAN devices in the system.

Returns: A pointer to the configuration table entry corresponding to the given device ID, or NULL if no match is found.

Note: None.

u8 XCan_GetMode ( XCan * InstancePtr )

This routine returns current operation mode the CAN device is in.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns

XCAN_MODE_CONFIG if the device is in Configuration Mode.
XCAN_MODE_SLEEP if the device is in Sleep Mode.
XCAN_MODE_NORMAL if the device is in Normal Mode.
XCAN_MODE_LOOPBACK if the device is in Loop Back Mode.

Note: None.

References XCan::IsReady, XCan_GetStatus(), XCAN_MODE_CONFIG, XCAN_MODE_LOOPBACK, XCAN_MODE_NORMAL, XCAN_MODE_SLEEP, XCAN_SR_CONFIG_MASK, XCAN_SR_NORMAL_MASK, and XCAN_SR_SLEEP_MASK.

Referenced by main(), XCan_EnterMode(), XCan_SelfTest(), XCan_SetBaudRatePrescaler(), XCan_SetBitTiming(), and XCanPolledExample().

u32 XCan_GetStatus ( XCan * InstancePtr )

This function returns Status value from Status Register (SR).

Use the XCAN_SR_* constants defined in xcan_l.h to interpret the returned value.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns: The 32-bit value read from Status Register.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCan_ReadReg, and XCAN_SR_OFFSET.

Referenced by XCan_GetMode().

int XCan_Initialize	(	XCan *	InstancePtr,
		u16	DeviceId
	)

This routine initializes a specific XCan instance/driver.

This function should only be used when no Virtual Memory support is needed. To use virtual memory, the caller should invoke XCan_VmInitialize(). See the description of XCan_VmInitialize() for detailed information.

This initialization entails:

Search for device configuration given the device ID.
Initialize Base Address field of the XCan structure using the device address in the found device configuration.
Populate all other data fields in the XCan structure
Reset the device.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
DeviceId	is the unique ID of the device controlled by this XCan instance. Passing in a device ID associates the generic XCan instance to a specific device, as chosen by the caller or application developer.

Returns

XST_SUCCESS if initialization was successful
- XST_DEVICE_NOT_FOUND if device configuration information was not found for a device with the supplied device ID.

Note: None.

References XCan_Config::BaseAddress, XCan::BaseAddress, and XCan_LookupConfig().

Referenced by main(), and XCanPolledExample().

void XCan_InterruptClear	(	XCan *	InstancePtr,
		u32	Mask
	)

This function clears interrupt(s).

Every bit set in Interrupt Status Register indicates that a specific type of interrupt is occurring, and this function clears one or more interrupts by writing a bit mask to Interrupt Clear Register.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
Mask	is the mask to clear. Bit positions of 1 will be cleared. Bit positions of 0 will not change the previous interrupt status. This mask is formed by OR'ing XCAN_IXR_* bits defined in xcan_l.h.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_ICR_OFFSET, XCan_InterruptGetStatus(), and XCan_WriteReg.

Referenced by XCan_IntrHandler(), and XCan_Recv().

void XCan_InterruptDisable	(	XCan *	InstancePtr,
		u32	Mask
	)

This routine disables interrupt(s).

Use the XCAN_IXR_* constants defined in xcan_l.h to create the bit-mask to disable interrupt(s).

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
Mask	is the mask to disable. Bit positions of 1 will be disabled. Bit positions of 0 will keep the previous setting. This mask is formed by OR'ing XCAN_IXR_* bits defined in xcan_l.h.

Returns: None.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_IER_OFFSET, XCan_InterruptGetEnabled(), and XCan_WriteReg.

void XCan_InterruptEnable	(	XCan *	InstancePtr,
		u32	Mask
	)

This routine enables interrupt(s).

Use the XCAN_IXR_* constants defined in xcan_l.h to create the bit-mask to enable interrupts.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
Mask	is the mask to enable. Bit positions of 1 will be enabled. Bit positions of 0 will keep the previous setting. This mask is formed by OR'ing XCAN_IXR_* bits defined in xcan_l.h.

Returns: None.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_IER_OFFSET, XCan_InterruptGetEnabled(), XCAN_IXR_ALL, and XCan_WriteReg.

Referenced by main().

u32 XCan_InterruptGetEnabled ( XCan * InstancePtr )

This routine returns enabled interrupt(s).

Use the XCAN_IXR_* constants defined in xcan_l.h to interpret the returned value.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns: Enabled interrupt(s) in a 32-bit format.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_IER_OFFSET, and XCan_ReadReg.

Referenced by XCan_InterruptDisable(), XCan_InterruptEnable(), and XCan_IntrHandler().

u32 XCan_InterruptGetStatus ( XCan * InstancePtr )

This routine returns interrupt status read from Interrupt Status Register.

Use the XCAN_IXR_* constants defined in xcan_l.h to interpret the returned value.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns: The value stored in Interrupt Status Register.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_ISR_OFFSET, and XCan_ReadReg.

Referenced by XCan_InterruptClear(), and XCan_IntrHandler().

void XCan_IntrHandler ( void * InstancePtr )

This routine is the interrupt handler for the CAN driver.

This handler reads the interrupt status from the ISR, determines the source of the interrupts, calls according callbacks, and finally clears the interrupts.

Application beyond this driver is responsible for providing callbacks to handle interrupts and installing the callbacks using XCan_SetHandler() during initialization phase. An example delivered with this driver demonstrates how this could be done.

Parameters

InstancePtr is a pointer to the XCan instance that just interrupted.

Returns: None.

Note: None.

References XCan::ErrorHandler, XCan::ErrorRef, XCan::EventHandler, XCan::EventRef, XCan::IsReady, XCan::RecvHandler, XCan::RecvRef, XCan::SendHandler, XCan::SendRef, XCan_ClearBusErrorStatus(), XCan_GetBusErrorStatus(), XCan_InterruptClear(), XCan_InterruptGetEnabled(), XCan_InterruptGetStatus(), XCAN_IXR_ARBLST_MASK, XCAN_IXR_BSOFF_MASK, XCAN_IXR_ERROR_MASK, XCAN_IXR_RXNEMP_MASK, XCAN_IXR_RXOFLW_MASK, XCAN_IXR_RXUFLW_MASK, XCAN_IXR_SLP_MASK, XCAN_IXR_TXBFLL_MASK, XCAN_IXR_TXFLL_MASK, XCAN_IXR_TXOK_MASK, and XCAN_IXR_WKUP_MASK.

Referenced by main().

XCan_Config * XCan_LookupConfig ( u16 DeviceId )

This function looks for the device configuration based on the unique device ID.

The table XCan_ConfigTable[] contains the configuration information for each device in the system.

Parameters

DeviceId is the unique device ID of the device being looked up.

Returns: A pointer to the configuration table entry corresponding to the given device ID, or NULL if no match is found.

Note: None.

Referenced by main(), XCan_Initialize(), and XCan_VmInitialize().

int XCan_Recv	(	XCan *	InstancePtr,
		u32 *	FramePtr
	)

This function receives a CAN Frame.

This function first checks if RX FIFO is empty, if not, it then reads a frame from the RX FIFO into the given buffer. This function returns error code immediately if there is no frame in the RX FIFO.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
FramePtr	is a pointer to a 32-bit aligned buffer where the CAN frame to be written.

Returns

XST_SUCCESS if RX FIFO was not empty and a frame was read from RX FIFO successfully and written into the given buffer;
XST_NO_DATA if there is no frame to be received from the FIFO

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCan_InterruptClear(), XCan_IsRxEmpty, XCAN_IXR_RXNEMP_MASK, XCan_ReadReg, XCAN_RXFIFO_DLC_OFFSET, XCAN_RXFIFO_DW1_OFFSET, XCAN_RXFIFO_DW2_OFFSET, and XCAN_RXFIFO_ID_OFFSET.

Referenced by main(), and XCan_SelfTest().

void XCan_Reset ( XCan * InstancePtr )

This function resets the CAN device.

Calling this function resets the device immediately, and any pending transmission or reception is terminated at once. Both Object Layer and Transfer Layer are reset. This function does not reset the Physical Layer. All registers are reset to the default values, and no previous status will be restored. TX FIFO, RX FIFO and TX High Priority Buffer are also reset.

When a reset is required due to an internal error, the driver notifies the upper layer software of this need through the error status code or interrupts The upper layer software is responsible for calling this Reset function and then re-configuring the device.

The CAN device will be in Configuration Mode immediately after this function returns.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns: None.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_SRR_OFFSET, XCAN_SRR_SRST_MASK, and XCan_WriteReg.

Referenced by main(), and XCan_SelfTest().

int XCan_SelfTest ( XCan * InstancePtr )

This function runs a self-test on the CAN driver/device.

The test resets the device, sets up the Loop Back mode, sends a standard frame, receives the frame, verifies the contents, and resets the device again.

Note that this is a destructive test in that resets of the device are performed. Refer to the device specification for the device status after the reset operation.

Parameters

InstancePtr is a pointer to the XCan instance to be worked on.

Returns

XST_SUCCESS if the self-test passed. i.e., the frame received via the internal loop back has the same contents as the sent frame.
- XST_FAILURE Otherwise.

Note

If the CAN device does not work properly, this function may enter an infinite loop and will never return to the caller.

If XST_FAILURE is returned, the device is not reset so that the caller could have a chance to check reason(s) causing the failure.

References XCan::IsReady, TEST_CAN_DLC, TEST_MESSAGE_ID, XCan_CreateDlcValue, XCan_CreateIdValue, XCan_EnterMode(), XCan_GetMode(), XCan_IsRxEmpty, XCAN_MAX_FRAME_SIZE_IN_WORDS, XCAN_MODE_CONFIG, XCAN_MODE_LOOPBACK, XCan_Recv(), XCan_Reset(), XCan_Send(), XCan_SetBaudRatePrescaler(), and XCan_SetBitTiming().

Referenced by main(), and XCanPolledExample().

int XCan_Send	(	XCan *	InstancePtr,
		u32 *	FramePtr
	)

This function sends a CAN Frame.

This function first checks if TX FIFO is full. If not, it then writes the given frame into the TX FIFO; otherwise, it returns error code immediately. This function does not wait for the given frame being sent to CAN bus.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
FramePtr	is a pointer to a 32-bit aligned buffer containing the CAN frame to be sent.

Returns

XST_SUCCESS if TX FIFO was not full and the given frame was written into the FIFO;
XST_FIFO_NO_ROOM if there is no room in the TX FIFO for the given frame

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCan_IsTxFifoFull, XCAN_TXFIFO_DLC_OFFSET, XCAN_TXFIFO_DW1_OFFSET, XCAN_TXFIFO_DW2_OFFSET, XCAN_TXFIFO_ID_OFFSET, and XCan_WriteReg.

Referenced by main(), and XCan_SelfTest().

int XCan_SendHighPriority	(	XCan *	InstancePtr,
		u32 *	FramePtr
	)

This routine sends a CAN High Priority frame.

This function first checks if TX High Priority Buffer is empty. If yes, it then writes the given frame into the Buffer. If not, This function returns immediately. This function does not wait for the given frame being sent to CAN bus.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
FramePtr	is a pointer to a 32-bit aligned buffer containing the CAN High Priority frame to be sent.

Returns

XST_SUCCESS if TX High Priority Buffer was not full and the given frame was written into the buffer;
XST_FIFO_NO_ROOM if there is no room in the TX High Priority Buffer for this frame.

Note

If the frame needs to be sent immediately and not delayed by processor's interrupts handling, the caller should disable interrupt at processor level before invoking this function.

References XCan::BaseAddress, XCan::IsReady, XCan_IsHighPriorityBufFull, XCAN_TXBUF_DLC_OFFSET, XCAN_TXBUF_DW1_OFFSET, XCAN_TXBUF_DW2_OFFSET, XCAN_TXBUF_ID_OFFSET, and XCan_WriteReg.

int XCan_SetBaudRatePrescaler	(	XCan *	InstancePtr,
		u8	Prescaler
	)

This routine sets Baud Rate Prescaler value.

The system clock for the CAN controller is divided by (Prescaler + 1) to generate the quantum clock needed for sampling and synchronization. Read the device specification for details.

Baud Rate Prescaler could be set only after CAN device entered Configuration Mode. So please call XCan_EnterMode() to enter Configuration Mode before using this function.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
Prescaler	is the value to set. Valid values are from 0 to 255.

Returns

XST_SUCCESS if the Baud Rate Prescaler value is set successfully.
XST_FAILURE if CAN device is not in Configuration Mode.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_BRPR_OFFSET, XCan_GetMode(), XCAN_MODE_CONFIG, and XCan_WriteReg.

Referenced by main(), XCan_SelfTest(), and XCanPolledExample().

int XCan_SetBitTiming	(	XCan *	InstancePtr,
		u8	SyncJumpWidth,
		u8	TimeSegment2,
		u8	TimeSegment1
	)

This routine sets Bit time.

Time segment 1, Time segment 2 and Synchronization Jump Width are set in this function. Device specification requires the values passed into this function be one less than the actual values of these fields. Read the device specification for details.

Bit time could be set only after CAN device entered Configuration Mode. Please call XCan_EnterMode() to enter Configuration Mode before using this function.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
SyncJumpWidth	is the Synchronization Jump Width value to set. Valid values are from 0 to 3.
TimeSegment2	is the Time Segment 2 value to set. Valid values are from 0 to 7.
TimeSegment1	is the Time Segment 1 value to set. Valid values are from 0 to 15.

Returns

XST_SUCCESS if the Bit time is set successfully.
XST_FAILURE if CAN device is not in Configuration Mode.
- XST_INVALID_PARAM if any value of SyncJumpWidth, TimeSegment2 and TimeSegment1 is invalid.

Note: None.

References XCan::BaseAddress, XCan::IsReady, XCAN_BTR_OFFSET, XCAN_BTR_SJW_MASK, XCAN_BTR_SJW_SHIFT, XCAN_BTR_TS1_MASK, XCAN_BTR_TS2_MASK, XCAN_BTR_TS2_SHIFT, XCan_GetMode(), XCAN_MODE_CONFIG, and XCan_WriteReg.

Referenced by main(), XCan_SelfTest(), and XCanPolledExample().

int XCan_SetHandler	(	XCan *	InstancePtr,
		u32	HandlerType,
		void *	CallBackFunc,
		void *	CallBackRef
	)

This routine installs an asynchronous callback function for the given HandlerType:

HandlerType              Callback Function Type
-----------------------  ---------------------------
XCAN_HANDLER_SEND        XCan_SendRecvHandler
XCAN_HANDLER_RECV        XCan_SendRecvHandler
XCAN_HANDLER_ERROR       XCan_ErrorHandler
XCAN_HANDLER_EVENT       XCan_EventHandler

HandlerType              Invoked by this driver when:
-----------------------  --------------------------------------------------
XCAN_HANDLER_SEND        A frame transmitted by a call to
                         XCan_Send() has been sent successfully.

XCAN_HANDLER_RECV        A frame has been received and is sitting in
                         the RX FIFO.

XCAN_HANDLER_ERROR       An error interrupt is occurring.

XCAN_HANDLER_EVENT       Any other kind of interrupt is occurring.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
HandlerType	specifies which handler is to be attached.
CallBackFunc	is the address of the callback function.
CallBackRef	is a user data item that will be passed to the callback function when it is invoked.

Returns

XST_SUCCESS when handler is installed.
XST_INVALID_PARAM when HandlerType is invalid.

Note: Invoking this function for a handler that already has been installed replaces it with the new handler.

References XCan::ErrorHandler, XCan::ErrorRef, XCan::EventHandler, XCan::EventRef, XCan::IsReady, XCan::RecvHandler, XCan::RecvRef, XCan::SendHandler, XCan::SendRef, XCAN_HANDLER_ERROR, XCAN_HANDLER_EVENT, XCAN_HANDLER_RECV, and XCAN_HANDLER_SEND.

Referenced by main().

int XCan_VmInitialize	(	XCan *	InstancePtr,
		u16	DeviceId,
		UINTPTR	VirtAddr
	)

This routine initializes of a specific XCan instance/driver.

This function should only be used if Virtual Memory support is necessary. The caller is responsible for calculating the correct device base address in Virtual memory address space and passing it into this function.

This initialization entails:

Search for device configuration given the device ID.
Initialize Base Address field of the XCan structure using the given virtual address parameter value.
Populate all other data fields in the XCan structure.
Reset the device.

Parameters

InstancePtr	is a pointer to the XCan instance to be worked on.
DeviceId	is the unique ID of the device controlled by this XCan instance. Passing in a device ID associates the generic XCan instance to a specific device, as chosen by the caller or application developer.
VirtAddr	is the device base address in the virtual memory address space. The caller is responsible for keeping the address mapping from VirtAddr to the device physical base address unchanged once this function is invoked. Unexpected errors may occur if the address mapping changes after this function is called.

Returns

XST_SUCCESS if initialization was successful
XST_DEVICE_NOT_FOUND if device configuration information was not found for a device with the supplied device ID.

Note: None.

References XCan::BaseAddress, and XCan_LookupConfig().

Variable Documentation

XCan_Config XCan_ConfigTable[XPAR_XCAN_NUM_INSTANCES]

Initial value:

= {
        {
                XPAR_OPB_CAN_0_DEVICE_ID,   
                XPAR_OPB_CAN_0_BASEADDR,    
                XPAR_OPB_CAN_0_CAN_NUM_ACF  
         }
}

This table contains configuration information for each CAN device in the system.

XCan_Config XCan_ConfigTable[]

This table contains configuration information for each CAN device in the system.

Data Structures

Macros

Typedefs

Functions

Variables

CAN operation modes

Callback identifiers used as parameters to XCan_SetHandler()

Register offsets for the CAN. Each register is 32 bits.

Software Reset Register

Mode Select Register

Baud Rate Prescaler register

Bit Timing Register

Error Counter Register

Error Status Register

Status Register

Interrupt Status/Enable/Clear Register

CAN Frame Identifier (TX High Priority Buffer/TX/RX/Acceptance Filter

CAN Frame Data Length Code (TX High Priority Buffer/TX/RX)

CAN Frame Data Word 1 (TX High Priority Buffer/TX/RX)

CAN Frame Data Word 2 (TX High Priority Buffer/TX/RX)

Acceptance Filter Register

CAN frame length constants

Macro Definition Documentation

Typedef Documentation

Function Documentation

Variable Documentation