mirror of
https://github.com/eddyem/zeiss_utils.git
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137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/* 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*/
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