can81c9x.h

CAN总线传输及液晶显示文章

//****************************************************************************
// @Module        Standalone Full-CAN Controller SAE 81C90/91
// @Filename      CAN80C9x.H
// @Project       Hands on Training for the kitCON CAN/LCD Module
//----------------------------------------------------------------------------
// @Controller    Siemens C16x
//
// @Compiler      Tasking C166 V5.0
//                Keil C166 V3.00
//
// @Author        Michael Knese
//
// @Description   This file contains all function prototypes and macros for CAN
//                
//
//----------------------------------------------------------------------------
// @Date          11/16/98 12:45:00 PM
//
//****************************************************************************
//****************************************************************************
// @Definition of a structure for the CAN data
//****************************************************************************

// The following data type serves as a software message object. Each access to
// a hardware message object has to be made by forward a pointer to a software
// message object (TCAN_Obj). The data type has the following fields:
//
// ubMsgCfg:
// this byte has the same structure as the message configuration register of a
// hardware message object. It contains the "Data Lenght Code" (DLC),
// and the "Message Direction" (DIR, read only access).
//
//         7     6     5      4    3     2     1     0
//      |-----------------------------------------------|
//      |                  | DIR |        DLC           |
//      |-----------------------------------------------|
//
// ulArbitr: 
// this field is four bytes long and contains either the 11-bit identifier 
//
// ubData[8]:
// 8 bytes containing the data of a frame
//
// uwTsr:
// this filed contained the time at wish a specific messeage was received
//

typedef struct
  {
     ubyte ubMsgCfg;    // 8-bit Message Configuration Register
     uword uwArbitr;    // standard (11-bit) identifier
     ubyte ubData[8];   // 8-bit Data Bytes
     uword uwTsr;       // Time-Stamp (only for the first 8 message objects 0-7)
  }TCAN81C9x_Obj;


//****************************************************************************
// @Prototypes of global functions
//****************************************************************************
void CAN81C9x_vInit(void);
void CAN81C9x_vTransmit(ubyte ConNr, ubyte ObjNr);



// USER CODE BEGIN (CANHeader,1)

// USER CODE END




//****************************************************************************
// @Defines
//****************************************************************************



// Structure for a single CAN controller

#define CAN_OFFSET_81 0xFD00

struct can_con_81
{
  ubyte  BL1;      	//Bit-length register
  ubyte  BL2;      	//
  ubyte  OC;      	//Output-control register
  ubyte  BRPR;      	//Baud-rate prescaler
  ubyte  RRR1;     	//Receive-ready register
  ubyte  RRR2;     	//
  ubyte  RIMR1;    	//Receive-interrupt-mask register
  ubyte  RIMR2;    	//
  ubyte  TRSR1;     	//Transmit-request-set register
  ubyte  TRSR2;     	//
  ubyte  IMSK;      	//Interrupt-mask register
  ubyte  res0B;      	//
  ubyte  res0C;      	//
  ubyte  res0D;      	//
  ubyte  res0E;      	//
  ubyte  res0F;      	//

  ubyte  MOD;      	//Mode/status register
  ubyte  INT;      	//Interrupt register
  ubyte  CTRL;      	//Control register
  ubyte  res13;      	//
  ubyte  CC;      	//Clock-control register
  ubyte  TCEC;      	//Transmit-check error counter
  ubyte  TCD;      	//Transmit-check data register
  ubyte  res17;      	//
  ubyte  TRR1;      	//Transmit-request-reset register
  ubyte  TRR2;      	//
  ubyte  RRPR1;      	//Remote-request-pending register
  ubyte  RRPR2;      	//
  ubyte  TSCH;      	//Time-Stamp counter
  ubyte  TSCL;      	//
  ubyte  res1E;      	//
  ubyte  res1F;      	//

  ubyte  res20;      	//
  ubyte  res21;      	//
  ubyte  res22;      	//
  ubyte  res23;      	//
  ubyte  res24;      	//
  ubyte  res25;      	//
  ubyte  res26;      	//
  ubyte  res27;      	//
  struct {
              ubyte PDR;     //port-direction register
              ubyte PR;	     //pin register
	      ubyte LR;	     //latch register
	      ubyte resP;    //
         }Port[2];      //
  struct {
              ubyte H;
              ubyte L;
         }TSR[8];      	//Time-Stamp Register
  struct {
              ubyte H;
              ubyte L;
         }DR[16];       //Descriptor Register
  ubyte res60_7F[32];      
  struct {
              ubyte Data[8];

         }MsgObj[16];	//Data Register
  
};


#define CAN_CON ((struct can_con_81 volatile xdata *) (CAN_OFFSET_81))


// USER CODE BEGIN (CANHeader,2)

// USER CODE END


//****************************************************************************
// @Macros
//****************************************************************************


//****************************************************************************
// @Function      diverse Macros
//
//----------------------------------------------------------------------------
// @Description   These macros can be used for checking the status of the
//                SAE 81C90/91 (read only)
//       CAN81C9x_BusState:             BS  = MOD.2
//                                      0: Normal Mode
//					1: Bus Off state, the IC does not 
//            				   participate in bus activities.
//		  ReceiverWarning:      RWL = MOD.3
//         				0: Receive-error counter below 96.
//           				1: Receive-error counter >= 96.
//		  TransmitWarning:  	TWL = MOD.4
//         				0: Transmit-error counter below 96.
//					1: Transmit-error counter >= 96.
//		  TransmissionComplete:	TC  = MOD.5
// 					0: The last transmission request is 
//					   not yet executed successfully.
//					1: The last transmission request was 
//					   executed successfully.
//		  ReceiveState:		RS  = MOD.6
//					0: No reception active.
//					1: Currently the SAE 81C90/91 is in 
//					   receive mode.
//
//----------------------------------------------------------------------------
// @Returnvalue   status of the corresponding bit (see above)
//
//----------------------------------------------------------------------------
// @Parameters    Number of the CAN - Controller (0-1)
//
//----------------------------------------------------------------------------
// @Date          11/2/98 4:50:26 PM
//
//****************************************************************************
#define CAN81C9x_BusState(ConNr)             ( (CAN_CON[ConNr].MOD >> 2) & 0x1 )
#define CAN81C9x_ReceiverWarning(ConNr)      ( (CAN_CON[ConNr].MOD >> 3) & 0x1 )
#define CAN81C9x_TransmitWarning(ConNr)      ( (CAN_CON[ConNr].MOD >> 4) & 0x1 )
#define CAN81C9x_TransmissionComplete(ConNr) ( (CAN_CON[ConNr].MOD >> 5) & 0x1 )
#define CAN81C9x_ReceiveState(ConNr)         ( (CAN_CON[ConNr].MOD >> 6) & 0x1 )



// USER CODE BEGIN (CANHeader,3)

// USER CODE END