CAN Bus Controller. More...

Collaboration diagram for SJA1000:

Data Structures
struct	_CANBuffer
Defines
#define	SJA1000_MODECTRL ((volatile uint8_t) (sja_base+0))
#define	RM_RR_Bit 0x01
#define	LOM_Bit 0x02
#define	STM_Bit 0x04
#define	AFM_Bit 0x08
#define	SM_Bit 0x10
#define	SJA1000_IEN ((volatile uint8_t) (sja_base+4))
#define	RIE_Bit 0x01
#define	TIE_Bit 0x02
#define	EIE_Bit 0x04
#define	DOIE_Bit 0x08
#define	WUIE_Bit 0x10
#define	EPIE_Bit 0x20
#define	ALIE_Bit 0x40
#define	BEIE_Bit 0x80
#define	SJA1000_CMD ((volatile uint8_t) (sja_base+1))
#define	TR_Bit 0x01
#define	AT_Bit 0x02
#define	RRB_Bit 0x04
#define	CDO_Bit 0x08
#define	SRR_Bit 0x10
#define	SJA1000_STATUS ((volatile uint8_t) (sja_base+2))
#define	RBS_Bit 0x01
#define	DOS_Bit 0x02
#define	TBS_Bit 0x04
#define	TCS_Bit 0x08
#define	RS_Bit 0x10
#define	TS_Bit 0x20
#define	ES_Bit 0x40
#define	BS_Bit 0x80
#define	SJA1000_INT ((volatile uint8_t) (sja_base+3))
#define	RI_Bit 0x01
#define	TI_Bit 0x02
#define	EI_Bit 0x04
#define	DOI_Bit 0x08
#define	WUI_Bit 0x10
#define	EPI_Bit 0x20
#define	ALI_Bit 0x40
#define	BEI_Bit 0x80
#define	SJA1000_BT0 ((volatile uint8_t) (sja_base+6))
#define	SJA1000_BT1 ((volatile uint8_t) (sja_base+7))
#define	SAM_Bit 0x80
#define	SJA1000_OUTCTRL ((volatile uint8_t) (sja_base+8))
#define	BiPhaseMode 0x00
#define	NormalMode 0x02
#define	ClkOutMode 0x03
#define	ClkOutMode 0x03
#define	OCPOL1_Bit 0x20
#define	OCPOL1_Bit 0x20
#define	Tx1Float 0x00
#define	Tx1Float 0x00
#define	Tx1PullDn 0x40
#define	Tx1PullDn 0x40
#define	Tx1PullUp 0x80
#define	Tx1PullUp 0x80
#define	Tx1PshPull 0xC0
#define	Tx1PshPull 0xC0
#define	OCPOLO_Bit 0x04
#define	Tx0Float 0x00
#define	Tx0Float 0x00
#define	Tx0PullDn 0x08
#define	Tx0PullDn 0x08
#define	Tx0PullUp 0x10
#define	Tx0PshPull 0x18
#define	SJA1000_AC0 ((volatile uint8_t) (sja_base+16))
#define	SJA1000_AC1 ((volatile uint8_t) (sja_base+17))
#define	SJA1000_AC2 ((volatile uint8_t) (sja_base+18))
#define	SJA1000_AC3 ((volatile uint8_t) (sja_base+19))
#define	SJA1000_AM0 ((volatile uint8_t) (sja_base+20))
#define	SJA1000_AM1 ((volatile uint8_t) (sja_base+21))
#define	SJA1000_AM2 ((volatile uint8_t) (sja_base+22))
#define	SJA1000_AM3 ((volatile uint8_t) (sja_base+23))
#define	SJA1000_RxFrameInfo ((volatile uint8_t) (sja_base+16))
#define	SJA1000_Rx1 ((volatile uint8_t) (sja_base+17))
#define	SJA1000_Rx2 ((volatile uint8_t) (sja_base+18))
#define	SJA1000_Rx3 ((volatile uint8_t) (sja_base+19))
#define	SJA1000_Rx4 ((volatile uint8_t) (sja_base+20))
#define	SJA1000_Rx5 ((volatile uint8_t) (sja_base+21))
#define	SJA1000_Rx6 ((volatile uint8_t) (sja_base+22))
#define	SJA1000_Rx7 ((volatile uint8_t) (sja_base+23))
#define	SJA1000_Rx8 ((volatile uint8_t) (sja_base+24))
#define	SJA1000_Rx9 ((volatile uint8_t) (sja_base+25))
#define	SJA1000_Rx10 ((volatile uint8_t) (sja_base+26))
#define	SJA1000_Rx11 ((volatile uint8_t) (sja_base+27))
#define	SJA1000_Rx12 ((volatile uint8_t) (sja_base+28))
#define	TestReg ((volatile uint8_t) (sja_base+9))
#define	SJA1000_TxFrameInfo ((volatile uint8_t) (sja_base+16))
#define	SJA1000_Tx1 ((volatile uint8_t) (sja_base+17))
#define	SJA1000_Tx2 ((volatile uint8_t) (sja_base+18))
#define	SJA1000_Tx3 ((volatile uint8_t) (sja_base+19))
#define	SJA1000_Tx4 ((volatile uint8_t) (sja_base+20))
#define	SJA1000_Tx5 ((volatile uint8_t) (sja_base+21))
#define	SJA1000_Tx6 ((volatile uint8_t) (sja_base+22))
#define	SJA1000_Tx7 ((volatile uint8_t) (sja_base+23))
#define	SJA1000_Tx8 ((volatile uint8_t) (sja_base+24))
#define	SJA1000_Tx9 ((volatile uint8_t) (sja_base+25))
#define	SJA1000_Tx10 ((volatile uint8_t) (sja_base+26))
#define	SJA1000_Tx11 ((volatile uint8_t) (sja_base+27))
#define	SJA1000_Tx12 ((volatile uint8_t) (sja_base+28))
#define	SJA1000_TxFrameInfoRd ((volatile uint8_t) (sja_base+96))
#define	SJA1000_TxRd1 ((volatile uint8_t) (sja_base+97))
#define	SJA1000_TxRd2 ((volatile uint8_t) (sja_base+98))
#define	SJA1000_TxRd3 ((volatile uint8_t) (sja_base+99))
#define	SJA1000_TxRd4 ((volatile uint8_t) (sja_base+100))
#define	SJA1000_TxRd5 ((volatile uint8_t) (sja_base+101))
#define	SJA1000_TxRd6 ((volatile uint8_t) (sja_base+102))
#define	SJA1000_TxRd7 ((volatile uint8_t) (sja_base+103))
#define	SJA1000_TxRd8 ((volatile uint8_t) (sja_base+104))
#define	SJA1000_TxRd9 ((volatile uint8_t) (sja_base+105))
#define	SJA1000_TxRd10 ((volatile uint8_t) (sja_base+106))
#define	SJA1000_TxRd11 ((volatile uint8_t) (sja_base+107))
#define	SJA1000_TxRd12 ((volatile uint8_t) (sja_base+108))
#define	SJA1000_ArbLostCap ((volatile uint8_t) (sja_base+11))
#define	SJA1000_ErrCodeCap ((volatile uint8_t) (sja_base+12))
#define	SJA1000_ErrWarnLimit ((volatile uint8_t) (sja_base+13))
#define	SJA1000_RxErrCount ((volatile uint8_t) (sja_base+14))
#define	SJA1000_TxErrCount ((volatile uint8_t) (sja_base+15))
#define	SJA1000_RxMsgCount ((volatile uint8_t) (sja_base+29))
#define	SJA1000_RxBufStartAdr ((volatile uint8_t) (sja_base+30))
#define	SJA1000_CLK_DIV ((volatile uint8_t) (sja_base+31))
#define	DivBy1 0x07
#define	DivBy2 0x00
#define	ClkOff_Bit 0x08
#define	RXINTEN_Bit 0x20
#define	CBP_Bit 0x40
#define	CANMode_Bit 0x80
#define	OCPOL0_Bit 0x04
#define	Presc_MB_16 0x00
#define	SJW_MB_16 0x00
#define	TSEG1_MB_16 0x04
#define	TSEG2_MB_16 0x10
#define	errCAN_INVALID_BAUD 7
#define	CAN_OK 0
#define	CAN_ERR 1
#define	CAN_INIT_SPEED_ERR 1
#define	CAN_NOT_INITIATED 1
#define	CAN_NOT_STARTED 1
#define	CAN_TXBUF_FULL 2
#define	CAN_RXBUF_EMPTY 2
#define	CAN_LOST_FRAME 0x01
#define	CAN_BUS_OFF 0x02
#define	CAN_29 0x80
#define	CAN_RTR 0x40
#define	ClrIntEnSJA 0x00
#define	SJA_SIGNAL sig_INTERRUPT7
#define	SJA_EICR EICRB
#define	SJA_SIGNAL_BIT 7
#define	SJA_BASE 0x8800
#define	CAN_BufSize 64
Typedefs
typedef struct _CANBuffer	CANBuffer
Functions
void	CANBufferInit (CANBuffer *buffer, uint16_t size)
CANFRAME	CANBufferGetMutex (CANBuffer *buffer)
void	CANBufferPutMutex (CANBuffer buffer, CANFRAME data)
CANFRAME	CANBufferGet (CANBuffer *buffer)
void	CANBufferPut (CANBuffer buffer, CANFRAME data)
uint16_t	CANBufferFree (CANBuffer *buffer)
uint8_t	SJARxAvail (NUTDEVICE *dev)
	checks if data is available in input buffer
uint8_t	SJATxFree (NUTDEVICE *dev)
	checks if there's still space in output buffer
void	SJAOutput (NUTDEVICE dev, CANFRAME frame)
	Write a frame from to output buffer.
uint8_t	SJAInput (NUTDEVICE dev, CANFRAME frame)
	Reads a frame from input buffer.
void	SJASetAccCode (NUTDEVICE dev, uint8_t ac)
	Sets the acceptance code.
void	SJASetAccMask (NUTDEVICE dev, uint8_t am)
	Sets the acceptance mask.
uint8_t	SJASetBaudrate (NUTDEVICE *dev, uint32_t baudrate)
	Sets the baudrate.
void	SJATxFrame (CANFRAME *CAN_frame)
	Sends a CAN Frane.
void	SJARxFrame (CANFRAME *CAN_frame)
	Receives a CAN Frane.
void	CAN_Tx (void *arg)
	CAN transmitter thread.
int	SJAInit (NUTDEVICE *dev)
	Initialize SJA1000 Canbus interface.
Variables
NUTDEVICE	devSJA1000
	Device information structure.
CANINFO	dcb_sja1000
volatile uint16_t	sja_base = 0x0000
CANBuffer	CAN_RX_BUF
CANBuffer	CAN_TX_BUF
IFCAN	ifc_sja1000
	Interface information structure.
NUTDEVICE	devSJA1000
	Device information structure.

Detailed Description

CAN Bus Controller.

Define Documentation

#define SJA1000_MODECTRL (*(volatile uint8_t*) (sja_base+0))

Referenced by SJAInit(), SJASetAccCode(), SJASetAccMask(), and SJASetBaudrate().

#define RM_RR_Bit 0x01

Referenced by SJAInit(), SJASetAccCode(), SJASetAccMask(), and SJASetBaudrate().

#define LOM_Bit 0x02

#define STM_Bit 0x04

#define AFM_Bit 0x08

Referenced by SJAInit(), SJASetAccCode(), and SJASetAccMask().

#define SM_Bit 0x10

#define SJA1000_IEN (*(volatile uint8_t*) (sja_base+4))

Referenced by SJAInit(), and SJAInput().

#define RIE_Bit 0x01

Referenced by SJAInit(), and SJAInput().

#define TIE_Bit 0x02

Referenced by SJAInit().

#define EIE_Bit 0x04

Referenced by SJAInit().

#define DOIE_Bit 0x08

Referenced by SJAInit().

#define WUIE_Bit 0x10

#define EPIE_Bit 0x20

#define ALIE_Bit 0x40

#define BEIE_Bit 0x80

#define SJA1000_CMD (*(volatile uint8_t*) (sja_base+1))

Referenced by SJARxFrame(), and SJATxFrame().

#define TR_Bit 0x01

Referenced by SJATxFrame().

#define AT_Bit 0x02

#define RRB_Bit 0x04

Referenced by SJARxFrame().

#define CDO_Bit 0x08

#define SRR_Bit 0x10

#define SJA1000_STATUS (*(volatile uint8_t*) (sja_base+2))

Referenced by CAN_Tx().

#define RBS_Bit 0x01

#define DOS_Bit 0x02

#define TBS_Bit 0x04

Referenced by CAN_Tx().

#define TCS_Bit 0x08

#define RS_Bit 0x10

#define TS_Bit 0x20

#define ES_Bit 0x40

#define BS_Bit 0x80

#define SJA1000_INT (*(volatile uint8_t*) (sja_base+3))

Referenced by SJAInit().

#define RI_Bit 0x01

#define TI_Bit 0x02

#define EI_Bit 0x04

#define DOI_Bit 0x08

#define WUI_Bit 0x10

#define EPI_Bit 0x20

#define ALI_Bit 0x40

#define BEI_Bit 0x80

#define SJA1000_BT0 (*(volatile uint8_t*) (sja_base+6))

Referenced by SJAInit(), and SJASetBaudrate().

#define SJA1000_BT1 (*(volatile uint8_t*) (sja_base+7))

Referenced by SJAInit(), and SJASetBaudrate().

#define SAM_Bit 0x80

#define SJA1000_OUTCTRL (*(volatile uint8_t*) (sja_base+8))

Referenced by SJAInit().

#define BiPhaseMode 0x00

#define NormalMode 0x02

Referenced by SJAInit().

#define ClkOutMode 0x03

#define OCPOL1_Bit 0x20

#define Tx1Float 0x00

Referenced by SJAInit().

#define Tx1Float 0x00

#define Tx1PullDn 0x40

#define Tx1PullUp 0x80

#define Tx1PshPull 0xC0

#define OCPOLO_Bit 0x04

#define Tx0Float 0x00

#define Tx0PullDn 0x08

#define Tx0PullUp 0x10

#define Tx0PshPull 0x18

Referenced by SJAInit().

#define SJA1000_AC0 (*(volatile uint8_t*) (sja_base+16))

Referenced by SJAInit(), and SJASetAccCode().

#define SJA1000_AC1 (*(volatile uint8_t*) (sja_base+17))

Referenced by SJAInit(), and SJASetAccCode().

#define SJA1000_AC2 (*(volatile uint8_t*) (sja_base+18))

Referenced by SJAInit(), and SJASetAccCode().

#define SJA1000_AC3 (*(volatile uint8_t*) (sja_base+19))

Referenced by SJAInit(), and SJASetAccCode().

#define SJA1000_AM0 (*(volatile uint8_t*) (sja_base+20))

Referenced by SJAInit(), and SJASetAccMask().

#define SJA1000_AM1 (*(volatile uint8_t*) (sja_base+21))

Referenced by SJAInit(), and SJASetAccMask().

#define SJA1000_AM2 (*(volatile uint8_t*) (sja_base+22))

Referenced by SJAInit(), and SJASetAccMask().

#define SJA1000_AM3 (*(volatile uint8_t*) (sja_base+23))

Referenced by SJAInit(), and SJASetAccMask().

#define SJA1000_RxFrameInfo (*(volatile uint8_t*) (sja_base+16))

Referenced by SJARxFrame().

#define SJA1000_Rx1 (*(volatile uint8_t*) (sja_base+17))

Referenced by SJARxFrame().

#define SJA1000_Rx2 (*(volatile uint8_t*) (sja_base+18))

Referenced by SJARxFrame().

#define SJA1000_Rx3 (*(volatile uint8_t*) (sja_base+19))

Referenced by SJARxFrame().

#define SJA1000_Rx4 (*(volatile uint8_t*) (sja_base+20))

Referenced by SJARxFrame().

#define SJA1000_Rx5 (*(volatile uint8_t*) (sja_base+21))

Referenced by SJARxFrame().

#define SJA1000_Rx6 (*(volatile uint8_t*) (sja_base+22))

Referenced by SJARxFrame().

#define SJA1000_Rx7 (*(volatile uint8_t*) (sja_base+23))

Referenced by SJARxFrame().

#define SJA1000_Rx8 (*(volatile uint8_t*) (sja_base+24))

Referenced by SJARxFrame().

#define SJA1000_Rx9 (*(volatile uint8_t*) (sja_base+25))

Referenced by SJARxFrame().

#define SJA1000_Rx10 (*(volatile uint8_t*) (sja_base+26))

Referenced by SJARxFrame().

#define SJA1000_Rx11 (*(volatile uint8_t*) (sja_base+27))

Referenced by SJARxFrame().

#define SJA1000_Rx12 (*(volatile uint8_t*) (sja_base+28))

Referenced by SJARxFrame().

#define TestReg (*(volatile uint8_t*) (sja_base+9))

#define SJA1000_TxFrameInfo (*(volatile uint8_t*) (sja_base+16))

Referenced by SJATxFrame().

#define SJA1000_Tx1 (*(volatile uint8_t*) (sja_base+17))

Referenced by SJATxFrame().

#define SJA1000_Tx2 (*(volatile uint8_t*) (sja_base+18))

Referenced by SJATxFrame().

#define SJA1000_Tx3 (*(volatile uint8_t*) (sja_base+19))

Referenced by SJATxFrame().

#define SJA1000_Tx4 (*(volatile uint8_t*) (sja_base+20))

Referenced by SJATxFrame().

#define SJA1000_Tx5 (*(volatile uint8_t*) (sja_base+21))

Referenced by SJATxFrame().

#define SJA1000_Tx6 (*(volatile uint8_t*) (sja_base+22))

Referenced by SJATxFrame().

#define SJA1000_Tx7 (*(volatile uint8_t*) (sja_base+23))

Referenced by SJATxFrame().

#define SJA1000_Tx8 (*(volatile uint8_t*) (sja_base+24))

Referenced by SJATxFrame().

#define SJA1000_Tx9 (*(volatile uint8_t*) (sja_base+25))

Referenced by SJATxFrame().

#define SJA1000_Tx10 (*(volatile uint8_t*) (sja_base+26))

Referenced by SJATxFrame().

#define SJA1000_Tx11 (*(volatile uint8_t*) (sja_base+27))

Referenced by SJATxFrame().

#define SJA1000_Tx12 (*(volatile uint8_t*) (sja_base+28))

Referenced by SJATxFrame().

#define SJA1000_TxFrameInfoRd (*(volatile uint8_t*) (sja_base+96))

#define SJA1000_TxRd1 (*(volatile uint8_t*) (sja_base+97))

#define SJA1000_TxRd2 (*(volatile uint8_t*) (sja_base+98))

#define SJA1000_TxRd3 (*(volatile uint8_t*) (sja_base+99))

#define SJA1000_TxRd4 (*(volatile uint8_t*) (sja_base+100))

#define SJA1000_TxRd5 (*(volatile uint8_t*) (sja_base+101))

#define SJA1000_TxRd6 (*(volatile uint8_t*) (sja_base+102))

#define SJA1000_TxRd7 (*(volatile uint8_t*) (sja_base+103))

#define SJA1000_TxRd8 (*(volatile uint8_t*) (sja_base+104))

#define SJA1000_TxRd9 (*(volatile uint8_t*) (sja_base+105))

#define SJA1000_TxRd10 (*(volatile uint8_t*) (sja_base+106))

#define SJA1000_TxRd11 (*(volatile uint8_t*) (sja_base+107))

#define SJA1000_TxRd12 (*(volatile uint8_t*) (sja_base+108))

#define SJA1000_ArbLostCap (*(volatile uint8_t*) (sja_base+11))

#define SJA1000_ErrCodeCap (*(volatile uint8_t*) (sja_base+12))

#define SJA1000_ErrWarnLimit (*(volatile uint8_t*) (sja_base+13))

#define SJA1000_RxErrCount (*(volatile uint8_t*) (sja_base+14))

#define SJA1000_TxErrCount (*(volatile uint8_t*) (sja_base+15))

#define SJA1000_RxMsgCount (*(volatile uint8_t*) (sja_base+29))

#define SJA1000_RxBufStartAdr (*(volatile uint8_t*) (sja_base+30))

#define SJA1000_CLK_DIV (*(volatile uint8_t*) (sja_base+31))

Referenced by SJAInit().

#define DivBy1 0x07

#define DivBy2 0x00

Referenced by SJAInit().

#define ClkOff_Bit 0x08

Referenced by SJAInit().

#define RXINTEN_Bit 0x20

#define CBP_Bit 0x40

Referenced by SJAInit().

#define CANMode_Bit 0x80

Referenced by SJAInit().

#define OCPOL0_Bit 0x04

#define Presc_MB_16 0x00

#define SJW_MB_16 0x00

#define TSEG1_MB_16 0x04

#define TSEG2_MB_16 0x10

#define errCAN_INVALID_BAUD 7

Referenced by SJAInit().

#define CAN_OK 0

#define CAN_ERR 1

#define CAN_INIT_SPEED_ERR 1

#define CAN_NOT_INITIATED 1

#define CAN_NOT_STARTED 1

#define CAN_TXBUF_FULL 2

#define CAN_RXBUF_EMPTY 2

#define CAN_LOST_FRAME 0x01

#define CAN_BUS_OFF 0x02

#define CAN_29 0x80

Referenced by SJARxFrame(), and SJATxFrame().

#define CAN_RTR 0x40

Referenced by SJARxFrame(), and SJATxFrame().

#define ClrIntEnSJA 0x00

Referenced by SJAInit().

#define SJA_SIGNAL sig_INTERRUPT7

Referenced by SJAInit().

#define SJA_EICR EICRB

#define SJA_SIGNAL_BIT 7

Referenced by SJAInit().

#define SJA_BASE 0x8800

Referenced by SJAInit().

#define CAN_BufSize 64

Referenced by CANBufferInit(), and SJAInit().

Typedef Documentation

typedef struct _CANBuffer CANBuffer

Function Documentation

void CANBufferInit	(	CANBuffer *	buffer,
		uint16_t	size
	)

References CAN_BufSize, _CANBuffer::dataindex, _CANBuffer::datalength, _CANBuffer::dataptr, _CANBuffer::empty, _CANBuffer::full, NutHeapAlloc, NutSemInit(), and _CANBuffer::size.

Referenced by SJAInit().

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CANFRAME CANBufferGetMutex ( CANBuffer * buffer )

References _CANBuffer::dataindex, _CANBuffer::datalength, _CANBuffer::dataptr, _CANBuffer::empty, _CANBuffer::full, NutSemPost(), NutSemWait(), and _CANBuffer::size.

Referenced by CAN_Tx().

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void CANBufferPutMutex	(	CANBuffer *	buffer,
		CANFRAME *	data
	)

References _CANBuffer::dataindex, _CANBuffer::datalength, _CANBuffer::dataptr, _CANBuffer::empty, _CANBuffer::full, NutSemPost(), NutSemWait(), and _CANBuffer::size.

Referenced by SJAOutput().

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CANFRAME CANBufferGet ( CANBuffer * buffer )

References _CANBuffer::dataindex, _CANBuffer::datalength, _CANBuffer::dataptr, and _CANBuffer::size.

Referenced by SJAInput().

void CANBufferPut	(	CANBuffer *	buffer,
		CANFRAME *	data
	)

References _CANBuffer::dataindex, _CANBuffer::datalength, _CANBuffer::dataptr, and _CANBuffer::size.

uint16_t CANBufferFree ( CANBuffer * buffer )

References _CANBuffer::datalength, and _CANBuffer::size.

Referenced by SJATxFree().

SJARxAvail ( NUTDEVICE * dev ) [inline]

checks if data is available in input buffer

Parameters:

dev	Pointer to the device structure

References _CANBuffer::datalength.

SJATxFree ( NUTDEVICE * dev ) [inline]

checks if there's still space in output buffer

Parameters:

dev	Pointer to the device structure

References CANBufferFree().

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SJAOutput	(	NUTDEVICE *	dev,
		CANFRAME *	frame
	)

Write a frame from to output buffer.

This function writes a frame to the output buffer. If the output buffer is full the function will block until frames are send.

Parameters:

dev	Pointer to the device structure
frame	Pointer to the receive frame

References _CANINFO::can_tx_rdy, CANBufferPutMutex(), _NUTDEVICE::dev_dcb, and NutEventPostAsync().

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SJAInput	(	NUTDEVICE *	dev,
		CANFRAME *	frame
	)

Reads a frame from input buffer.

This function reads a frame from the input buffer. If the input buffer is empty the function will block unitl new frames are received.

Parameters:

dev	Pointer to the device structure
frame	Pointer to the receive frame

Returns:: 1 if timeout, 0 otherwise

References _CANINFO::can_rx_rdy, CANBufferGet(), _CANBuffer::datalength, _NUTDEVICE::dev_dcb, _NUTDEVICE::dev_icb, NutEnterCritical, NutEventWait(), NutExitCritical, RIE_Bit, and SJA1000_IEN.

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SJASetAccCode	(	NUTDEVICE *	dev,
		uint8_t *	ac
	)

Sets the acceptance code.

Parameters:

dev	Pointer to the device structure
ac	4 byte char array with the acceptance code

References AFM_Bit, _NUTDEVICE::dev_icb, memcpy(), RM_RR_Bit, SJA1000_AC0, SJA1000_AC1, SJA1000_AC2, SJA1000_AC3, and SJA1000_MODECTRL.

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SJASetAccMask	(	NUTDEVICE *	dev,
		uint8_t *	am
	)

Sets the acceptance mask.

Parameters:

dev	Pointer to the device structure
am	4 byte char array with the acceptance mask

References AFM_Bit, _NUTDEVICE::dev_icb, memcpy(), RM_RR_Bit, SJA1000_AM0, SJA1000_AM1, SJA1000_AM2, SJA1000_AM3, and SJA1000_MODECTRL.

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SJASetBaudrate	(	NUTDEVICE *	dev,
		uint32_t	baudrate
	)

Sets the baudrate.

Parameters:

dev	Pointer to the device structure
baudrate	Baudrate (One of the defined baudrates. See sja1000.h)

References CAN_SPEED_100K, CAN_SPEED_10K, CAN_SPEED_125K, CAN_SPEED_1M, CAN_SPEED_20K, CAN_SPEED_250K, CAN_SPEED_500K, CAN_SPEED_50K, CAN_SPEED_800K, _NUTDEVICE::dev_icb, RM_RR_Bit, SJA1000_BT0, SJA1000_BT1, and SJA1000_MODECTRL.

SJATxFrame ( CANFRAME * CAN_frame )

Sends a CAN Frane.

Parameters:

CAN_frame Pointer to the send frame

References _CANFRAME::byte, CAN_29, CAN_RTR, _CANFRAME::ext, _CANFRAME::id, _CANFRAME::len, _CANFRAME::rtr, SJA1000_CMD, SJA1000_Tx1, SJA1000_Tx10, SJA1000_Tx11, SJA1000_Tx12, SJA1000_Tx2, SJA1000_Tx3, SJA1000_Tx4, SJA1000_Tx5, SJA1000_Tx6, SJA1000_Tx7, SJA1000_Tx8, SJA1000_Tx9, SJA1000_TxFrameInfo, and TR_Bit.

Referenced by CAN_Tx().

SJARxFrame ( CANFRAME * CAN_frame )

Receives a CAN Frane.

Parameters:

CAN_frame Pointer to the receive frame

References _CANFRAME::byte, CAN_29, CAN_RTR, _CANFRAME::ext, _CANFRAME::id, _CANFRAME::len, RRB_Bit, _CANFRAME::rtr, SJA1000_CMD, SJA1000_Rx1, SJA1000_Rx10, SJA1000_Rx11, SJA1000_Rx12, SJA1000_Rx2, SJA1000_Rx3, SJA1000_Rx4, SJA1000_Rx5, SJA1000_Rx6, SJA1000_Rx7, SJA1000_Rx8, SJA1000_Rx9, and SJA1000_RxFrameInfo.

CAN_Tx ( void * arg )

CAN transmitter thread.

This thread transmits data if there's some in the output buffer. It runs with high priority.

References _CANINFO::can_tx_frames, _CANINFO::can_tx_rdy, CANBufferGetMutex(), _NUTDEVICE::dev_dcb, NUT_WAIT_INFINITE, NutEventWait(), NutThreadSetPriority(), SJA1000_STATUS, SJATxFrame(), and TBS_Bit.

Referenced by SJAInit().

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SJAInit ( NUTDEVICE * dev )

Initialize SJA1000 Canbus interface.

Applications typically do not use this function, but call NutRegisterDevice().

Parameters:

dev	Identifies the device to initialize. The structure must be properly set.

References AFM_Bit, ifcan::can_acc_code, ifcan::can_acc_mask, ifcan::can_baudrate, CAN_BufSize, CAN_SPEED_100K, CAN_SPEED_10K, CAN_SPEED_125K, CAN_SPEED_1M, CAN_SPEED_20K, CAN_SPEED_250K, CAN_SPEED_500K, CAN_SPEED_50K, CAN_SPEED_800K, CAN_Tx(), CANBufferInit(), CANMode_Bit, cbi, CBP_Bit, ClkOff_Bit, ClrIntEnSJA, _NUTDEVICE::dev_base, _NUTDEVICE::dev_dcb, _NUTDEVICE::dev_icb, DivBy2, DOIE_Bit, EICR, EIE_Bit, errCAN_INVALID_BAUD, memset(), NormalMode, NutEnterCritical, NutExitCritical, NutRegisterIrqHandler(), NutThreadCreate(), RIE_Bit, RM_RR_Bit, sbi, SJA1000_AC0, SJA1000_AC1, SJA1000_AC2, SJA1000_AC3, SJA1000_AM0, SJA1000_AM1, SJA1000_AM2, SJA1000_AM3, SJA1000_BT0, SJA1000_BT1, SJA1000_CLK_DIV, SJA1000_IEN, SJA1000_INT, SJA1000_MODECTRL, SJA1000_OUTCTRL, SJA_BASE, sja_base, SJA_SIGNAL, SJA_SIGNAL_BIT, TIE_Bit, Tx0PshPull, and Tx1Float.

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Variable Documentation

NUTDEVICE devSJA1000

Device information structure.

Applications must pass this structure to NutRegisterDevice() to bind this CAN device driver to the Nut/OS kernel.

CANINFO dcb_sja1000

volatile uint16_t sja_base = 0x0000

Referenced by SJAInit().

CANBuffer CAN_RX_BUF

CANBuffer CAN_TX_BUF

IFCAN ifc_sja1000

Initial value:

 {
    CAN_IF_2B,                  
    CAN_SPEED_500K,             
    {0xFF, 0xFF, 0xFF, 0xFF}
    ,                           
    {0x00, 0x00, 0x00, 0x00}
    ,                           
    NUT_WAIT_INFINITE,         
    SJARxAvail,                 
    SJATxFree,                  
    SJAInput,                   
    SJAOutput,                  
    SJASetAccCode,              
    SJASetAccMask,              
    SJASetBaudrate              
}

Interface information structure.

This struct stores some interface parameters like bautdate and acceptance mask / code. Beside this Callback handlers are registered.

NUTDEVICE devSJA1000

Initial value:

 {
    0,                          
    {'s', 'j', 'a', '1', '0', '0', '0', 0, 0}
    ,                           
    IFTYP_CAN,                  
    0,                          
    0,                          
    &ifc_sja1000,               
    &dcb_sja1000,               
    SJAInit,                    
    0,                          
    0,                          
    0,                          
    0,                          
    0,                          
    0,                          
    0                           
}

Device information structure.

Applications must pass this structure to NutRegisterDevice() to bind this CAN device driver to the Nut/OS kernel.

Data Structures

Defines

Typedefs

Functions

Variables

Detailed Description

Define Documentation

Typedef Documentation

Function Documentation

Variable Documentation