CAN routines shared between OCCAN, GRCAN and GRCANFD controllers. More...

Files
file	canbtrs.h
	Common CAN baud-rate routines for OCCAN/GRCAN/GRCANFD controllers.

file	grcan.h
	Driver API for the GRLIB GRCAN and GRCANFD controllers.

file	occan.h
	Driver API for GRLIB wrapper to OpenCores CAN.

file	canbtrs.c
	Common CAN baud-rate routines for OCCAN/GRCAN/GRCANFD controllers.

Data Structures
struct	grlib_canbtrs_ranges

struct	grlib_canbtrs_timing

struct	grcan_regs

struct	grcan_stats

struct	grcan_timing

struct	grcanfd_timing

struct	grcan_selection

struct	grcan_filter

struct	CANMsg

struct	CANFDMsg

Macros
#define	GRCAN_FDOPT_NOM 0

#define	GRCAN_FDOPT_FDBTR 0x01

#define	GRCAN_FDOPT_FDFRM 0x02

#define	GRCAN_FDMASK (GRCAN_FDOPT_FDBTR \| GRCAN_FDOPT_FDFRM)

#define	GRCAN_CFG_ABORT 0x00000001

#define	GRCAN_CFG_ENABLE0 0x00000002

#define	GRCAN_CFG_ENABLE1 0x00000004

#define	GRCAN_CFG_SELECTION 0x00000008

#define	GRCAN_CFG_SILENT 0x00000010

#define	GRCAN_CFG_BPR 0x00000300

#define	GRCAN_CFG_RSJ 0x00007000

#define	GRCAN_CFG_PS1 0x00f00000

#define	GRCAN_CFG_PS2 0x000f0000

#define	GRCAN_CFG_SCALER 0xff000000

#define	GRCAN_CFG_BPR_BIT 8

#define	GRCAN_CFG_RSJ_BIT 12

#define	GRCAN_CFG_PS1_BIT 20

#define	GRCAN_CFG_PS2_BIT 16

#define	GRCAN_CFG_SCALER_BIT 24

#define	GRCAN_CTRL_RESET 0x2

#define	GRCAN_CTRL_ENABLE 0x1

#define	GRCAN_TXCTRL_ENABLE 1

#define	GRCAN_TXCTRL_ONGOING 1

#define	GRCAN_RXCTRL_ENABLE 1

#define	GRCAN_RXCTRL_ONGOING 1

#define	GRCANFD_NBTR_SCALER 0x00ff0000

#define	GRCANFD_NBTR_PS1 0x0000fc00

#define	GRCANFD_NBTR_PS2 0x000003e0

#define	GRCANFD_NBTR_SJW 0x0000001f

#define	GRCANFD_NBTR_SCALER_BIT 16

#define	GRCANFD_NBTR_PS1_BIT 10

#define	GRCANFD_NBTR_PS2_BIT 5

#define	GRCANFD_NBTR_SJW_BIT 0

#define	GRCANFD_FDBTR_SCALER 0x00ff0000

#define	GRCANFD_FDBTR_PS1 0x00003c00

#define	GRCANFD_FDBTR_PS2 0x000001e0

#define	GRCANFD_FDBTR_SJW 0x0000000f

#define	GRCANFD_FDBTR_SCALER_BIT 16

#define	GRCANFD_FDBTR_PS1_BIT 10

#define	GRCANFD_FDBTR_PS2_BIT 5

#define	GRCANFD_FDBTR_SJW_BIT 0

#define	GRCAN_IRQ_IRQ 0

#define	GRCAN_IRQ_TXSYNC 1

#define	GRCAN_IRQ_RXSYNC 2

#define	GRCAN_ERR_IRQ 0x1

#define	GRCAN_OFF_IRQ 0x2

#define	GRCAN_OR_IRQ 0x4

#define	GRCAN_RXAHBERR_IRQ 0x8

#define	GRCAN_TXAHBERR_IRQ 0x10

#define	GRCAN_RXIRQ_IRQ 0x20

#define	GRCAN_TXIRQ_IRQ 0x40

#define	GRCAN_RXFULL_IRQ 0x80

#define	GRCAN_TXEMPTY_IRQ 0x100

#define	GRCAN_RX_IRQ 0x200

#define	GRCAN_TX_IRQ 0x400

#define	GRCAN_RXSYNC_IRQ 0x800

#define	GRCAN_TXSYNC_IRQ 0x1000

#define	GRCAN_RXERR_IRQ 0x2000

#define	GRCAN_TXERR_IRQ 0x4000

#define	GRCAN_RXMISS_IRQ 0x8000

#define	GRCAN_TXLOSS_IRQ 0x10000

#define	GRCAN_STAT_PASS 0x1

#define	GRCAN_STAT_OFF 0x2

#define	GRCAN_STAT_OR 0x4

#define	GRCAN_STAT_AHBERR 0x8

#define	GRCAN_STAT_ACTIVE 0x10

#define	GRCAN_STAT_RXERRCNT 0xff00

#define	GRCAN_STAT_TXERRCNT 0xff0000

Enumerations
enum	{ GRCAN_RET_OK = 0 , GRCAN_RET_INVARG = -1 , GRCAN_RET_NOTSTARTED = -2 , GRCAN_RET_TIMEOUT = -3 , GRCAN_RET_BUSOFF = -4 , GRCAN_RET_AHBERR = -5 }

enum	grcan_state { STATE_STOPPED = 0 , STATE_STARTED = 1 , STATE_BUSOFF = 2 , STATE_AHBERR = 3 }

Functions
int	grlib_canbtrs_calc_timing (unsigned int baud, unsigned int core_hz, unsigned int sampl_pt, struct grlib_canbtrs_ranges br, struct grlib_canbtrs_timing timing)

int	grcan_dev_count (void)

void *	grcan_open (int dev_no)

void *	grcan_open_by_name (char name, int dev_no)

int	grcan_close (void *d)

int	grcan_canfd_capable (void *d)

int	grcan_read (void d, CANMsg msg, size_t count)

int	grcanfd_read (void d, CANFDMsg msg, size_t count)

int	grcan_write (void d, CANMsg msg, size_t count)

int	grcanfd_write (void d, CANFDMsg msg, size_t ucount)

int	grcan_get_state (void *d)

int	grcan_start (void *d)

int	grcan_stop (void *d)

int	grcan_flush (void *d)

int	grcan_set_silent (void *d, int silent)

int	grcan_set_abort (void *d, int abort)

int	grcan_set_selection (void d, const struct grcan_selection selection)

int	grcan_set_speed (void *d, unsigned int hz)

int	grcan_set_btrs (void d, const struct grcan_timing timing)

int	grcanfd_set_speed (void *d, unsigned int nomhz, unsigned int fdhz)

int	grcanfd_set_btrs (void d, const struct grcanfd_timing nominal, const struct grcanfd_timing *fd)

int	grcan_set_rxblock (void *d, int block)

int	grcan_set_txblock (void *d, int block)

int	grcan_set_txcomplete (void *d, int complete)

int	grcan_set_rxcomplete (void *d, int complete)

int	grcan_get_stats (void d, struct grcan_stats stats)

int	grcan_clr_stats (void *d)

int	grcan_set_afilter (void d, const struct grcan_filter filter)

int	grcan_set_sfilter (void d, const struct grcan_filter filter)

int	grcan_get_status (void d, unsigned int status)

void	grcan_register_drv (void)

Variables
unsigned int	grlib_canbtrs_ranges::max_scaler

char	grlib_canbtrs_ranges::has_bpr

unsigned char	grlib_canbtrs_ranges::divfactor

unsigned char	grlib_canbtrs_ranges::min_tseg1

unsigned char	grlib_canbtrs_ranges::max_tseg1

unsigned char	grlib_canbtrs_ranges::min_tseg2

unsigned char	grlib_canbtrs_ranges::max_tseg2

unsigned char	grlib_canbtrs_timing::scaler

unsigned char	grlib_canbtrs_timing::ps1

unsigned char	grlib_canbtrs_timing::ps2

unsigned char	grlib_canbtrs_timing::rsj

unsigned char	grlib_canbtrs_timing::bpr

Detailed Description

CAN routines shared between OCCAN, GRCAN and GRCANFD controllers.

Macros used for grcan controller.

Files

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description