CAN

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

Files
file	bsps/include/grlib/canbtrs.h
	Common CAN baud-rate routines for OCCAN/GRCAN/GRCANFD controllers.
file	bsps/include/grlib/grcan.h
	Driver API for the GRLIB GRCAN and GRCANFD controllers.
file	bsps/include/grlib/occan.h
	Driver API for GRLIB wrapper to OpenCores CAN.
file	bsps/shared/grlib/can/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
union	CANFDMsg::[union].data

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.