can_pxa.h

这是在linux下的key驱动,很不错的.

//#include <linux/types.h>
#include <linux/ioctl.h>

#ifndef _CAN_H
#define _CAN_H

#ifndef PACKED
#define PACKED __attribute__((packed))
#endif
#define CAN_MSG_LENGTH 8

struct canmsg_t {
	short		flags;
	int		cob;
	unsigned int	id;
	unsigned int	timestamp;
	unsigned int	length;
	char		data[CAN_MSG_LENGTH];
} PACKED;

/* Definitions to use for canmsg_t flags */
#define MSG_RTR (1<<0)
#define MSG_OVR (1<<1)
#define MSG_EXT (1<<2)
#define MSG_STAN 0
/* CAN ioctl magic number */
#define CAN_IOC_MAGIC 'd'

unsigned long bittiming;
unsigned short channel;
enum bau {B1000,B800,B500,B320,B250,B160,B80,B40,B20,B10,B5};
/* CAN ioctl functions */
#define CAN_IOCRESET             _IO(CAN_IOC_MAGIC,  0)  

 
#define CAN_SET_BAUDRATE         _IOW(CAN_IOC_MAGIC,  10,enum bau) 
#define CAN_GET_BAUDRATE         _IOR(CAN_IOC_MAGIC,  11,enum bau )  
                                                      
#define CAN_SET_FILTER           _IOW(CAN_IOC_MAGIC,  12,filter_struct *)
#define CAN_GET_FILTER           _IOR(CAN_IOC_MAGIC,  13,filter) 
                                                      
#define CAN_SET_MODE		         _IOW(CAN_IOC_MAGIC,  14,int)
#define CAN_GET_MODE             _IOR(CAN_IOC_MAGIC,  15,int)  
                                                      
#define DEV_SET_REG              _IOW(CAN_IOC_MAGIC,  28,unsigned char *)
#define DEV_GET_REG              _IOWR(CAN_IOC_MAGIC, 29,unsigned char *)

#define DEBUG_INFO               _IOW(CAN_IOC_MAGIC,  31,int)


/*Define Can mode for function ioctl CAN_SET_MODE and CAN_GET_MODE*/

#define MODE_SM  (1<<4)	//Sleep Mode 0 (wake-up) 0 (wake-up)
#define MODE_AFM (1<<3)	//Acceptance Filter Mode 0 (dual) X
#define MODE_STM (1<<2)	//Self Test Mode 0 (normal) X
#define MODE_LOM (1<<1)	//Listen Only Mode 0 (normal) X
#define MODE_RM  (1<<0)	//Reset Mode 1 (present) 1 (present)


typedef struct _filter_struct
{
   unsigned int  code;
   unsigned int  mask;
} filter_struct;
#endif //_CAN_H