mcp2515_defs.h

CAN-CAN - Controller Area Network Projects

/* from Microchip Example */

#ifndef MCP2515_DEFS_H_
#define MCP2515_DEFS_H_

/*
mcp2515_defs.h

This file contains constants that are specific to the MCP2515.

Version     Date        Description
----------------------------------------------------------------------
v1.00       2003/12/11  Initial release
Copyright 2003 Kimberly Otten Software Consulting

Changes M. Thomas:
- rename to mcp2515_defs.h
- added handy definitions from kvaser-sample
- status-bits

*/

// Begin mt
#define MCP_SIDH        0
#define MCP_SIDL        1
#define MCP_EID8        2
#define MCP_EID0        3

#define MCP_TXB_EXIDE_M     0x08    /* In TXBnSIDL */
#define MCP_DLC_MASK        0x0F    /* 4 LSBits */
#define MCP_RTR_MASK        0x40    /* (1<<6) Bit 6 */

#define MCP_RXB_RX_ANY      0x60
#define MCP_RXB_RX_EXT      0x40
#define MCP_RXB_RX_STD      0x20
#define MCP_RXB_RX_STDEXT   0x00
#define MCP_RXB_RX_MASK     0x60
#define MCP_RXB_BUKT_MASK   (1<<2)

/*
** Bits in the TXBnCTRL registers.
*/
#define MCP_TXB_TXBUFE_M    0x80
#define MCP_TXB_ABTF_M      0x40
#define MCP_TXB_MLOA_M      0x20
#define MCP_TXB_TXERR_M     0x10
#define MCP_TXB_TXREQ_M     0x08
#define MCP_TXB_TXIE_M      0x04
#define MCP_TXB_TXP10_M     0x03

#define MCP_TXB_RTR_M       0x40    // In TXBnDLC
#define MCP_RXB_IDE_M       0x08    // In RXBnSIDL
#define MCP_RXB_RTR_M       0x40    // In RXBnDLC

#define MCP_STAT_RXIF_MASK   (0x03)
#define MCP_STAT_RX0IF (1<<0)
#define MCP_STAT_RX1IF (1<<1)

#define MCP_EFLG_RX1OVR (1<<7)
#define MCP_EFLG_RX0OVR (1<<6)
#define MCP_EFLG_TXBO   (1<<5)
#define MCP_EFLG_TXEP   (1<<4)
#define MCP_EFLG_RXEP   (1<<3)
#define MCP_EFLG_TXWAR  (1<<2)
#define MCP_EFLG_RXWAR  (1<<1)
#define MCP_EFLG_EWARN  (1<<0)
#define MCP_EFLG_ERRORMASK  (0xF8) /* 5 MS-Bits */

// End mt


// Define MCP2515 register addresses

#define MCP_RXF0SIDH	0x00
#define MCP_RXF0SIDL	0x01
#define MCP_RXF0EID8	0x02
#define MCP_RXF0EID0	0x03
#define MCP_RXF1SIDH	0x04
#define MCP_RXF1SIDL	0x05
#define MCP_RXF1EID8	0x06
#define MCP_RXF1EID0	0x07
#define MCP_RXF2SIDH	0x08
#define MCP_RXF2SIDL	0x09
#define MCP_RXF2EID8	0x0A
#define MCP_RXF2EID0	0x0B
#define MCP_CANSTAT		0x0E
#define MCP_CANCTRL		0x0F
#define MCP_RXF3SIDH	0x10
#define MCP_RXF3SIDL	0x11
#define MCP_RXF3EID8	0x12
#define MCP_RXF3EID0	0x13
#define MCP_RXF4SIDH	0x14
#define MCP_RXF4SIDL	0x15
#define MCP_RXF4EID8	0x16
#define MCP_RXF4EID0	0x17
#define MCP_RXF5SIDH	0x18
#define MCP_RXF5SIDL	0x19
#define MCP_RXF5EID8	0x1A
#define MCP_RXF5EID0	0x1B
#define MCP_TEC			0x1C
#define MCP_REC			0x1D
#define MCP_RXM0SIDH	0x20
#define MCP_RXM0SIDL	0x21
#define MCP_RXM0EID8	0x22
#define MCP_RXM0EID0	0x23
#define MCP_RXM1SIDH	0x24
#define MCP_RXM1SIDL	0x25
#define MCP_RXM1EID8	0x26
#define MCP_RXM1EID0	0x27
#define MCP_CNF3		0x28
#define MCP_CNF2		0x29
#define MCP_CNF1		0x2A
#define MCP_CANINTE		0x2B
#define MCP_CANINTF		0x2C
#define MCP_EFLG		0x2D
#define MCP_TXB0CTRL	0x30
#define MCP_TXB1CTRL	0x40
#define MCP_TXB2CTRL	0x50
#define MCP_RXB0CTRL	0x60
#define MCP_RXB0SIDH	0x61
#define MCP_RXB1CTRL	0x70
#define MCP_RXB1SIDH	0x71


#define MCP_TX_INT		0x1C		// Enable all transmit interrupts
#define MCP_TX01_INT	0x0C		// Enable TXB0 and TXB1 interrupts
#define MCP_RX_INT		0x03		// Enable receive interrupts
#define MCP_NO_INT		0x00		// Disable all interrupts

#define MCP_TX01_MASK	0x14
#define MCP_TX_MASK		0x54

// Define SPI Instruction Set

#define MCP_WRITE		0x02

#define MCP_READ		0x03

#define MCP_BITMOD		0x05

#define MCP_LOAD_TX0	0x40
#define MCP_LOAD_TX1	0x42
#define MCP_LOAD_TX2	0x44

#define MCP_RTS_TX0		0x81
#define MCP_RTS_TX1		0x82
#define MCP_RTS_TX2		0x84
#define MCP_RTS_ALL		0x87

#define MCP_READ_RX0	0x90
#define MCP_READ_RX1	0x94

#define MCP_READ_STATUS	0xA0

#define MCP_RX_STATUS	0xB0

#define MCP_RESET		0xC0


// CANCTRL Register Values

#define MODE_NORMAL     0x00
#define MODE_SLEEP      0x20
#define MODE_LOOPBACK   0x40
#define MODE_LISTENONLY 0x60
#define MODE_CONFIG     0x80
#define MODE_POWERUP	0xE0
#define MODE_MASK		0xE0
#define ABORT_TX        0x10
#define MODE_ONESHOT	0x08
#define CLKOUT_ENABLE	0x04
#define CLKOUT_DISABLE	0x00
#define CLKOUT_PS1		0x00
#define CLKOUT_PS2		0x01
#define CLKOUT_PS4		0x02
#define CLKOUT_PS8		0x03


// CNF1 Register Values

#define SJW1            0x00
#define SJW2            0x40
#define SJW3            0x80
#define SJW4            0xC0


// CNF2 Register Values

#define BTLMODE			0x80
#define SAMPLE_1X       0x00
#define SAMPLE_3X       0x40


// CNF3 Register Values

#define SOF_ENABLE		0x80
#define SOF_DISABLE		0x00
#define WAKFIL_ENABLE	0x40
#define WAKFIL_DISABLE	0x00


// CANINTF Register Bits

#define MCP_RX0IF		0x01
#define MCP_RX1IF		0x02
#define MCP_TX0IF		0x04
#define MCP_TX1IF		0x08
#define MCP_TX2IF		0x10
#define MCP_ERRIF		0x20
#define MCP_WAKIF		0x40
#define MCP_MERRF		0x80



#endif