can.h

Go to the documentation of this file.

#include "t89c51cc02.h"
#include "datatypes.h"
/* baud rate 500kbit/s and bit timing parameters at Fosc=16Mhz */
/* refer to Xcalculator software on Atmel website for other bit timing */

/* defaults waren 5 0 1 3 2 */

#define BRP_500k    0x00
#define SJW_500k    0x00
#define PRS_500k    0x00
#define PHS2_500k   0x07
#define PHS1_500k   0x05

#define BRP_250k    0x01
#define PRS_250k    0x00
#define PHS1_250k   0x05
#define PHS2_250k   0x07
#define SJW_250k    0x00

#define MSK_CANGCON_ENA         0x02
#define MSK_CANGCON_GRES        0x01

#define DLC_MAX            8
#define CH_DISABLE         0x00
#define CH_RxENA           0x80
#define CH_TxENA           0x40
#define MSK_CANGIE_ENRX    0x20
#define MSK_CANGIE_ENTX    0x10

#define CAN_ACK                 0x06

#define CAN_NAK                 0x15

#define CAN_RECVID              0x400

#define CAN_SENDID              0x401

#define CAN_setchannel(ch) CANPAGE = (ch << 4)

#define CAN_enablechannel(ch) CANEN |= (1 << ch)

void CAN_init(void);
void CAN_interrupt(void) interrupt 7 using 1;
void CAN_SendACK(BYTE);
void CAN_SendMsg(BYTE);
void CAN_SendNAK(BYTE);

/* allow foreign access to can data array */
extern volatile BYTE idata can_data[8];

---