drivers/can_lincan/canmsg.h
author edouard
Sat, 13 Nov 2010 23:08:34 +0100
changeset 633 2c43383a1d57
parent 145 e747d2e26af0
permissions -rw-r--r--
Fix mingw32 cross build for can_peak_win32 and can_tcp_win32 server.
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/* canmsg.h - common kernel-space and user-space CAN message structure
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 * Linux CAN-bus device driver.
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 * Written by Pavel Pisa - OCERA team member
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 * email:pisa@cmp.felk.cvut.cz
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 * This software is released under the GPL-License.
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 * Version lincan-0.3  17 Jun 2004
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 */
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#ifndef _CANMSG_T_H
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#define _CANMSG_T_H
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#ifdef __KERNEL__
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#include <linux/time.h>
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#include <linux/types.h>
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#else /* __KERNEL__ */
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#include <sys/time.h>
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#include <sys/types.h>
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#endif /* __KERNEL__ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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 * CAN_MSG_VERSION_2 enables new canmsg_t layout compatible with
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 * can4linux project from http://www.port.de/
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 *
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 */
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#define CAN_MSG_VERSION_2
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/* Number of data bytes in one CAN message */
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#define CAN_MSG_LENGTH 8
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#ifdef CAN_MSG_VERSION_2
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typedef struct timeval canmsg_tstamp_t ;
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typedef unsigned long canmsg_id_t;
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/**
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 * struct canmsg_t - structure representing CAN message
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 * @flags:  message flags
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 *      %MSG_RTR .. message is Remote Transmission Request,
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 *	%MSG_EXT .. message with extended ID,
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 *      %MSG_OVR .. indication of queue overflow condition,
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 *	%MSG_LOCAL .. message originates from this node.
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 * @cob:    communication object number (not used)
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 * @id:     ID of CAN message
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 * @timestamp: not used
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 * @length: length of used data
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 * @data:   data bytes buffer
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 *
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 * Header: canmsg.h
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 */
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struct canmsg_t {
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	int             flags;
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	int             cob;
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	canmsg_id_t     id;
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	canmsg_tstamp_t timestamp;
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	unsigned short  length;
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	unsigned char   data[CAN_MSG_LENGTH];
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};
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#else /*CAN_MSG_VERSION_2*/
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#ifndef PACKED
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#define PACKED __attribute__((packed))
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#endif
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/* Old, deprecated version of canmsg_t structure */
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struct canmsg_t {
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	short		flags;
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	int		cob;
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	canmsg_id_t	id;
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	unsigned long	timestamp;
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	unsigned int	length;
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	unsigned char	data[CAN_MSG_LENGTH];
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} PACKED;
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#endif /*CAN_MSG_VERSION_2*/
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typedef struct canmsg_t canmsg_t;
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/**
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 * struct canfilt_t - structure for acceptance filter setup
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 * @flags:  message flags
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 *      %MSG_RTR .. message is Remote Transmission Request,
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 *	%MSG_EXT .. message with extended ID,
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 *      %MSG_OVR .. indication of queue overflow condition,
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 *	%MSG_LOCAL .. message originates from this node.
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 *	there are corresponding mask bits
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 *	%MSG_RTR_MASK, %MSG_EXT_MASK, %MSG_LOCAL_MASK.
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 *	%MSG_PROCESSLOCAL enables local messages processing in the
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 *	combination with global setting
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 * @queid:  CAN queue identification in the case of the multiple
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 *	    queues per one user (open instance)
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 * @cob:    communication object number (not used)
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 * @id:     selected required value of cared ID id bits
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 * @mask:   select bits significand for the comparation;
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 *          1 .. take care about corresponding ID bit, 0 .. don't care
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 *
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 * Header: canmsg.h
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 */
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struct canfilt_t {
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	int		flags;
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	int		queid;
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	int		cob;
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	canmsg_id_t	id;
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	canmsg_id_t	mask;
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};
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typedef struct canfilt_t canfilt_t;
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/* Definitions to use for canmsg_t and canfilt_t flags */
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#define MSG_RTR   (1<<0)
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#define MSG_OVR   (1<<1)
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#define MSG_EXT   (1<<2)
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#define MSG_LOCAL (1<<3)
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/* If you change above lines, check canque_filtid2internal function */
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/* Additional definitions used for canfilt_t only */
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#define MSG_FILT_MASK_SHIFT   8
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#define MSG_RTR_MASK   (MSG_RTR<<MSG_FILT_MASK_SHIFT)
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#define MSG_EXT_MASK   (MSG_EXT<<MSG_FILT_MASK_SHIFT)
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#define MSG_LOCAL_MASK (MSG_LOCAL<<MSG_FILT_MASK_SHIFT)
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#define MSG_PROCESSLOCAL (MSG_OVR<<MSG_FILT_MASK_SHIFT)
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/* Can message ID mask */
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#define MSG_ID_MASK ((1l<<29)-1)
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#ifdef __cplusplus
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} /* extern "C"*/
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#endif
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#endif /*_CANMSG_T_H*/