/* ---------------------------------------------------------------------------
 * can.h                                               (c) 2008 Micro-key bv
 * ---------------------------------------------------------------------------
 * Micro-key bv
 * Industrieweg 28, 9804 TG Noordhorn
 * Postbus 92, 9800 AB Zuidhorn
 * The Netherlands
 * Tel: +31 594 503020
 * Fax: +31 594 505825
 * Email: support@microkey.nl   
 * Web: www.microkey.nl
 * ---------------------------------------------------------------------------
 * Description: 
 * ---------------------------------------------------------------------------
 * Version(s):  0.1, Feb 11, 2008, MMi
 *                   Creation.
 * ---------------------------------------------------------------------------
 */
#ifndef CAN_H_
#define CAN_H_    
/* ---------------------------------------------------------------------------
 * System include files.
 * ---------------------------------------------------------------------------
 */
/* Hardware Includes */
#include "LPC23xx.h"
#include "types.h"

/* ---------------------------------------------------------------------------
 * Application include files.
 * ---------------------------------------------------------------------------
 */

/* ---------------------------------------------------------------------------
 * Constant and macro definitions.
 * ---------------------------------------------------------------------------
 */

// Maximum number of total FullCAN Filters for ALL CAN interfaces
#define MAX_FILTERS 20

// Define CAN SFR address bases 
#define CAN_REG_BASE                    (0xE0000000)
#define ACCEPTANCE_FILTER_RAM_BASE      (CAN_REG_BASE + 0x00038000)
#define ACCEPTANCE_FILTER_REGISTER_BASE (CAN_REG_BASE + 0x0003C000)
#define CENTRAL_CAN_REGISTER_BASE       (CAN_REG_BASE + 0x00040000)              

// Common CAN bit rates
#define     CANBitrate50_12MHz              0x001C000E
#define     CANBitrate125k_12MHz            0x001C0005
#define     CANBitrate250k_12MHz            0x001C0002

// CAN Interrupt Service Routines
void CAN_IRS_Handler (void) __attribute__ ((naked, interrupt("IRQ")));
/* ---------------------------------------------------------------------------
 * Type definitions.
 * ---------------------------------------------------------------------------
 */
// Type definition to hold a FullCAN message
// Compatible to FullCAN Mode Stored Messages in LPC User Manual
typedef struct
{
  UINT32 Dat1; // Bits  0..10: CAN Message ID
               // Bits 13..15: CAN interface number (1..4)
               // Bits 16..19: DLC - Data Length Counter
               // Bits 24..25: Semaphore bits
  UINT32 DatA; // CAN Message Data Bytes 0-3
  UINT32 DatB; // CAN Message Data Bytes 4-7
} CAN_MSG;
/* ---------------------------------------------------------------------------
 * Variable declarations.
 * ---------------------------------------------------------------------------
 */

/* ---------------------------------------------------------------------------
 * Function declarations.
 * ---------------------------------------------------------------------------
 */


UINT16 CANInit (
  UINT32 can_btr                   /* CAN Baud Rate setting        */
  );


UINT16 CANSetFilter 
  (
  UINT32 CANID       // 11-bit CAN message identifier
  );



UINT16 CANPushMessage (
  CAN_MSG *pTransmitBuf // Source pointer to a CAN message
  );


UINT16 CANPullMessage (
  CAN_MSG *pReceiveBuf // Destination pointer to a CAN message
  );


void CAN_CANISR_Rx1 (void);
void CAN_CANISR_Rx2 (void);
void CAN_CANISR_Err (void);
void CAN_ERRORBUS (void);



#endif /*CAN_H_*/