lib_can.h

基于sam7x256平台做的CAN与网口互转接口

#ifndef	__lib_can_H
#define	__lib_can_H



/*typedef 	enum		_mailboxnum_				
{ 

	AT91C_BASE_CAN_MB0 = 0, 					
	AT91C_BASE_CAN_MB0,						
	AT91C_BASE_CAN_MB0,							
	AT91C_BASE_CAN_MB0,	
	MailBox4,
	MailBox5,	
	MailBox6,	
	MailBox7							

}MailBoxNUM;*/

/*------------------*/
/* CAN Definition   */
/*------------------*/

#define AT91B_CAN_TRANSCEIVER_RS  (1<<2)    // PA2	

#define AT91C_TEST_NOK			0
#define AT91C_TEST_OK			1
#define AT91C_CAN_TIMEOUT       100000
#define	USE_CAN_cycRCV_BUF_SIZE	50//*环形缓冲区大小
//*定义一个与CANMailBox类似得数据结构，便于接受
/*pedef	union		_canrdx_
{
	ULONG		Word;					//字操作定义
	struct	
	{
		ULONG	Data1 	:8;			//数据字节
		ULONG	Data2 	:8;	
		ULONG	Data3 	:8;	
		ULONG	Data4 	:8;	
	}Bits;
}uCANRDx,*P_uCANRDx;*/

typedef	struct	_stcRXBUF_
{
	ULONG   RDA;
	ULONG	RDB;
}*P_stcRxBUF,stcRxBUF;
typedef	struct	_RcvCANDataCycleBuf_
 {
	ULONG		WritePoint	:8;			//CAN的写指针
	ULONG		ReadPoint	:8;			//CAN的读指针
	ULONG		FullFlag	:8;			//CAN缓冲区满标志

	stcRxBUF	RcvBuf[USE_CAN_cycRCV_BUF_SIZE];
 }stcRcvCANCyBuf,*P_stcRcvCANCyBuf;


//应用环形缓冲区定义

extern stcRcvCANCyBuf		CANRcvCyBufApp;//*建立缓冲区
//*---------------------------------------------------------------------------------------------
//*                      函数区
//*--------------------------------------------------------------------------------------------
extern void CANInit(void);
extern void AT91F_InitMailbox(void);


#endif/* lib_can_h */