lindriver.h

基于MC908QY4的LIN从站通信例程

#ifndef _08QY4_LIN_SLAVE_DRV
#define _08QY4_LIN_SLAVE_DRV

#pragma MESSAGE DISABLE C1106

/*		Defs			*/

//defines needed for the types used in the project
#define  U8             unsigned char
#define  VU8            volatile unsigned char
#define  U16            unsigned short
#define  VU16           volatile unsigned short
#define  U32            unsigned long
#define  VU32           volatile unsigned long

//Driver states
#define Unsyncronized	0
#define Idle 			1
#define PossibleSynk 	2
#define Syncbreak		3
#define	Syncronised		4
#define ReceiveId		8
#define Receiving		9
#define ReceivingWFS	10  // Waiting for start bit while receiving
#define Sending			12

#define SLEEP			0x80

#define SyncBitCount	33   
#define DefaultBitTimeH 1
#define DefaultBitTimeL 0xaa

typedef unsigned char byte;

typedef union {
  U8 Byte;
  struct {
    byte Bit		:1;           /* BitError */
    byte Bit2		:1;			  /* BitError latch */
    byte Checksum   :1;           /* Checksumerror */
    byte FTO	    :1;           /* FrametimeOut = No traffic on the bus for FrameTimeOutLimit x 0xFFFF clocks */
    byte NRIDD	    :1;           /* RelevantIdTimeOutLimit amount of valid ID's detected without detecting a ID relevant to this slave */
    byte Sleep	    :1;           /*  */
    byte Wake	    :1;           /* Not used at the moment */
    byte spare7     :1;           /*  */
  } Bits;
} LINERRORSTR;

#define LinERROR 			_LinERROR.Byte
#define BitERROR 			_LinERROR.Bits.Bit
#define BitERROR2 			_LinERROR.Bits.Bit2
#define ChecksumERROR 		_LinERROR.Bits.Checksum
//#define FrameTimeOutERROR 	_LinERROR.Bits.FTO   //not used at the moment
#define NoRelIDDetected 	_LinERROR.Bits.NRIDD
#define LINSleep			_LinERROR.Bits.Sleep
//#define LINWake				_LinERROR.Bits.Wake  //not used at the moment

#pragma DATA_SEG SHORT _DATA_ZEROPAGE 

extern volatile LINERRORSTR _LinERROR;

#pragma DATA_SEG DEFAULT

/* Function Prototype */
/* API */
void LIN_Init(void);
U8 LIN_GetMsg(U8 msgId, U8 *msgData );
U8 LIN_PutMsg(U8 msgId, U8 *msgData);
U8 LIN_MsgStatus(U8 msgId );
void LIN_GotoRun( void );
U8 LIN_Wakeup( void );

/* LIN message declarations */
extern U8 volatile * MessagePointerTbl[]; 
extern U8 const near IdTbl[];  
extern U8 const near MessageCountTbl[]; 
extern U8 volatile LinMsgStatus[];
extern U8 const No_of_Ids;

#pragma DATA_SEG SHORT _DATA_ZEROPAGE   

extern U8 volatile near LinState;   //state of the driver
extern U8 volatile near BitTimeH, BitTimeL;  	//bit time value
extern U8 volatile near BreakH, BreakL; //used for calculating length of breakpulse

#pragma DATA_SEG DEFAULT

/*----------------------------------------------------------------------*/
/*   LINStatusType Constant Definition   */

#define LIN_OK                0x00    /* No error, service call has succeeded.                    */
#define LIN_MSG_NOCHANGE      0x02    /* The message data has not changed since last read.        */
#define LIN_MSG_OVERRUN       0x04    /* The message data has not been read and was overwritten.  */

#define LIN_INVALID_MODE      0x16    /* The service could not be called in the current driver state */                                      
#define LIN_INVALID_ID        0x80    /* The message identifier is invalid, i.e. the message      */
                                      /* direction differs from the configured one.               */
#define LIN_NO_ID             0x7F    /* The message identifier is absent, i.e. there is no such  */
                                      /* identifier configured on this node.                      */

/* Message state */
/* The message data buffer is empty (data has not been initialized or received yet) */
#define LIN_MSG_NODATA      0x01u
/* The message data buffer has been updated by the user */
#define LIN_MSG_UPDATED     0x20u
#define LIN_MSG_OK          0x10u



#endif /* _08QY4_LIN_SLAVE_DRV */