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nuttx/drivers/can/mcp2515.h

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MCP2515: Changes from review of last PR
2017-05-23 20:22:49 +02:00
/****************************************************************************
* drivers/can/mcp2515.c
*
* Copyright (C) 2017 Alan Carvalho de Assis. All rights reserved.
* Author: Alan Carvalho de Assis <acassis@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX, Atmel, nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __DRIVERS_CAN_MCP2514_H
#define __DRIVERS_CAN_MCP2514_H 1
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
Add Microchip MCP2515 CAN Bus controller driver
2017-05-23 19:28:52 +02:00
/* Register Addresses */
#define MCP2515_RXF0SIDH 0x00
#define MCP2515_RXF0SIDL 0x01
#define MCP2515_RXF0EID8 0x02
#define MCP2515_RXF0EID0 0x03
#define MCP2515_RXF1SIDH 0x04
#define MCP2515_RXF1SIDL 0x05
#define MCP2515_RXF1EID8 0x06
#define MCP2515_RXF1EID0 0x07
#define MCP2515_RXF2SIDH 0x08
#define MCP2515_RXF2SIDL 0x09
#define MCP2515_RXF2EID8 0x0a
#define MCP2515_RXF2EID0 0x0b
#define MCP2515_BFPCTRL 0x0c
#define MCP2515_TXRTSCTRL 0x0d
#define MCP2515_CANSTAT 0x0e
#define MCP2515_CANCTRL 0x0f
#define MCP2515_RXF3SIDH 0x10
#define MCP2515_RXF3SIDL 0x11
#define MCP2515_RXF3EID8 0x12
#define MCP2515_RXF3EID0 0x13
#define MCP2515_RXF4SIDH 0x14
#define MCP2515_RXF4SIDL 0x15
#define MCP2515_RXF4EID8 0x16
#define MCP2515_RXF4EID0 0x17
#define MCP2515_RXF5SIDH 0x18
#define MCP2515_RXF5SIDL 0x19
#define MCP2515_RXF5EID8 0x1a
#define MCP2515_RXF5EID0 0x1b
#define MCP2515_TEC 0x1c
#define MCP2515_REC 0x1d
#define MCP2515_RXM0SIDH 0x20
#define MCP2515_RXM0SIDL 0x21
#define MCP2515_RXM0EID8 0x22
#define MCP2515_RXM0EID0 0x23
#define MCP2515_RXM1SIDH 0x24
#define MCP2515_RXM1SIDL 0x25
#define MCP2515_RXM1EID8 0x26
#define MCP2515_RXM1EID0 0x27
#define MCP2515_CNF3 0x28
#define MCP2515_CNF2 0x29
#define MCP2515_CNF1 0x2a
#define MCP2515_CANINTE 0x2b
#define MCP2515_CANINTF 0x2c
#define MCP2515_EFLG 0x2d
#define MCP2515_TXB0CTRL 0x30
#define MCP2515_TXB0SIDH 0x31
#define MCP2515_TXB0SIDL 0x32
#define MCP2515_TXB0EID8 0x33
#define MCP2515_TXB0EID0 0x34
#define MCP2515_TXB0DLC 0x35
#define MCP2515_TXB0D0 0x36
#define MCP2515_TXB0D1 0x37
#define MCP2515_TXB0D2 0x38
#define MCP2515_TXB0D3 0x39
#define MCP2515_TXB0D4 0x3a
#define MCP2515_TXB0D5 0x3b
#define MCP2515_TXB0D6 0x3c
#define MCP2515_TXB0D7 0x3d
#define MCP2515_TXB1CTRL 0x40
#define MCP2515_TXB1SIDH 0x41
#define MCP2515_TXB1SIDL 0x42
#define MCP2515_TXB1EID8 0x43
#define MCP2515_TXB1EID0 0x44
#define MCP2515_TXB1DLC 0x45
#define MCP2515_TXB1D0 0x46
#define MCP2515_TXB1D1 0x47
#define MCP2515_TXB1D2 0x48
#define MCP2515_TXB1D3 0x49
#define MCP2515_TXB1D4 0x4a
#define MCP2515_TXB1D5 0x4b
#define MCP2515_TXB1D6 0x4c
#define MCP2515_TXB1D7 0x4d
#define MCP2515_TXB2CTRL 0x50
#define MCP2515_TXB2SIDH 0x51
#define MCP2515_TXB2SIDL 0x52
#define MCP2515_TXB2EID8 0x53
#define MCP2515_TXB2EID0 0x54
#define MCP2515_TXB2DLC 0x55
#define MCP2515_TXB2D0 0x56
#define MCP2515_TXB2D1 0x57
#define MCP2515_TXB2D2 0x58
#define MCP2515_TXB2D3 0x59
#define MCP2515_TXB2D4 0x5a
#define MCP2515_TXB2D5 0x5b
#define MCP2515_TXB2D6 0x5c
#define MCP2515_TXB2D7 0x5d
#define MCP2515_RXB0CTRL 0x60
#define MCP2515_RXB0SIDH 0x61
#define MCP2515_RXB0SIDL 0x62
#define MCP2515_RXB0EID8 0x63
#define MCP2515_RXB0EID0 0x64
#define MCP2515_RXB0DLC 0x65
#define MCP2515_RXB0D0 0x66
#define MCP2515_RXB0D1 0x67
#define MCP2515_RXB0D2 0x68
#define MCP2515_RXB0D3 0x69
#define MCP2515_RXB0D4 0x6a
#define MCP2515_RXB0D5 0x6b
#define MCP2515_RXB0D6 0x6c
#define MCP2515_RXB0D7 0x6d
#define MCP2515_RXB1CTRL 0x70
#define MCP2515_RXB1SIDH 0x71
#define MCP2515_RXB1SIDL 0x72
#define MCP2515_RXB1EID8 0x73
#define MCP2515_RXB1EID0 0x74
#define MCP2515_RXB1DLC 0x75
#define MCP2515_RXB1D0 0x76
#define MCP2515_RXB1D1 0x77
#define MCP2515_RXB1D2 0x78
#define MCP2515_RXB1D3 0x79
#define MCP2515_RXB1D4 0x7a
#define MCP2515_RXB1D5 0x7b
#define MCP2515_RXB1D6 0x7c
#define MCP2515_RXB1D7 0x7d
/* Offset to simplify mcp2515_receive() function */
#define MCP2515_RX0_OFFSET 0x00
#define MCP2515_RX1_OFFSET 0x10
/* Offset to simplify mcp2515_send() function */
#define MCP2515_TX0_OFFSET 0x00
#define MCP2515_TX1_OFFSET 0x10
#define MCP2515_TX2_OFFSET 0x20
/* CANCTRL: CAN CONTROL REGISTER */
#define CANCTRL_CLKPRE_SHIFT (0) /* Bits 0-1: CLKOUT Pin Prescaler bits */
#define CANCTRL_CLKPRE_MASK (3 << CANCTRL_CLKPRE_SHIFT)
#define CANCTRL_CLKEN (1 << 2) /* Bit 2: CLKOUT Pin Enable bit */
#define CANCTRL_OSM (1 << 3) /* Bit 3: One-Shot Mode bit */
#define CANCTRL_ABAT (1 << 4) /* Bit 4: Abort All Pending Transmissions bit */
#define CANCTRL_REQOP_SHIFT (5) /* Bits 5-7: Request Operation Mode bits */
#define CANCTRL_REQOP_MASK (7 << CANCTRL_REQOP_SHIFT)
#define CANCTRL_REQOP_NORMAL (0 << CANCTRL_REQOP_SHIFT)
#define CANCTRL_REQOP_SLEEP (1 << CANCTRL_REQOP_SHIFT)
#define CANCTRL_REQOP_LOOPBK (2 << CANCTRL_REQOP_SHIFT)
#define CANCTRL_REQOP_LISTEN (3 << CANCTRL_REQOP_SHIFT)
#define CANCTRL_REQOP_CONFIG (4 << CANCTRL_REQOP_SHIFT)
/* TXBnCTRL – TRANSMIT BUFFER n CONTROL REGISTER */
#define TXBCTRL_TXP_SHIFT (0) /* Bits 0-1: Transmit Buffer Priority */
#define TXBCTRL_TXP_MASK (3 << MCP2515_TXBCTRL_TXP_SHIFT)
/* Bit 2: Not used */
#define TXBCTRL_TXREQ (1 << 3) /* Bit 3: Message Transmit Request bit */
#define TXBCTRL_TXERR (1 << 4) /* Bit 4: Transmission Error Detected bit */
#define TXBCTRL_MLOA (1 << 5) /* Bit 5: Message Lost Arbitration bit */
#define TXBCTRL_ABTF (1 << 6) /* Bit 6: Message Aborted Flag bit */
/* Bit 7: Not used */
/* TXRTSCTRL – TXnRTS PIN CONTROL AND STATUS REGISTER */
#define TXRTSCTRL_B0RTSM (1 << 0) /* Bit 0: TX0RTS Pin mode bit */
#define TXRTSCTRL_B1RTSM (1 << 1) /* Bit 1: TX1RTS Pin mode bit */
#define TXRTSCTRL_B2RTSM (1 << 2) /* Bit 2: TX2RTS Pin mode bit */
#define TXRTSCTRL_B0RTS (1 << 3) /* Bit 3: TX0RTS Pin State bit */
#define TXRTSCTRL_B1RTS (1 << 4) /* Bit 4: TX1RTS Pin State bit */
#define TXRTSCTRL_B2RTS (1 << 5) /* Bit 5: TX2RTS Pin State bit */
/* Bit 6-7: Not used */
/* TXBnSIDH – TRANSMIT BUFFER n STANDARD IDENTIFIER HIGH */
#define TXBSIDH_SID_MASK 0xff /* Standard Identifier bits <10:3> */
/* TXBnSIDL – TRANSMIT BUFFER n STANDARD IDENTIFIER LOW */
#define TXBSIDL_SID_SHIFT (5) /* Bits 5-7: Standard Identifier bits <2:0> */
#define TXBSIDL_SID_MASK (0x7 << TXBSIDL_SID_SHIFT)
#define TXBSIDL_EXIDE (1 << 3) /* Bit 3: Extended Identifier Enable bit */
#define TXBSIDL_EID_SHIFT (0) /* Bits 0-1: Extended Identifier bits <17:16> */
#define TXBSIDL_EID_MASK (0x03 << TXBSIDL_EID_MASK)
/* TXBnEID8 – TRANSMIT BUFFER n EXTENDED IDENTIFIER HIGH */
#define TXBEID8_EID_MASK 0xff /* Bits 0-7: Extended Identifier bits <15:8> */
/* TXBnEID0 – TRANSMIT BUFFER n EXTENDED IDENTIFIER LOW */
#define TXBEID0_EID_MASK 0xff /* Bits 0-7: Extended Identifier bits <7:0> */
/* TXBnDLC - TRANSMIT BUFFER n DATA LENGTH CODE */
#define TXBDLC_DLC_SHIFT (0) /* Bits 0-3: Data Length Code <3:0> bits */
#define TXBDLC_DLC_MASK (0xf << TXBDLC_DLC_SHIFT)
#define TXBDLC_RTR (1 << 6) /* Bit 6: Remote Transmission Request bit */
/* TXBnDm – TRANSMIT BUFFER n DATA BYTE m */
#define TXBD_D0 (1 << 0) /* Bit 0: Transmit Buffer n Data Field Bytes 0 */
#define TXBD_D1 (1 << 1) /* Bit 1: Transmit Buffer n Data Field Bytes 1 */
#define TXBD_D2 (1 << 2) /* Bit 2: Transmit Buffer n Data Field Bytes 2 */
#define TXBD_D3 (1 << 3) /* Bit 3: Transmit Buffer n Data Field Bytes 3 */
#define TXBD_D4 (1 << 4) /* Bit 4: Transmit Buffer n Data Field Bytes 4 */
#define TXBD_D5 (1 << 5) /* Bit 5: Transmit Buffer n Data Field Bytes 5 */
#define TXBD_D6 (1 << 6) /* Bit 6: Transmit Buffer n Data Field Bytes 6 */
#define TXBD_D7 (1 << 7) /* Bit 7: Transmit Buffer n Data Field Bytes 7 */
/* RXB0CTRL – RECEIVE BUFFER 0 CONTROL */
#define RXB0CTRL_FILHIT (1 << 0) /* Bit 0: Filter Hit bit - 1 = Msg was accepted by Filter 1; 0 = Filter 0 */
#define RXB0CTRL_BUKT1 (1 << 1) /* Bit 1: Read-only Copy of BUKT bit (used internally by the MCP2515) */
#define RXB0CTRL_BUKT (1 << 2) /* Bit 2: Rollover Enable bit */
/* These bits are common to RXB0 and RXB1: */
#define RXBCTRL_RXRTR (1 << 3) /* Bit 3: Received Remote Transfer Request bit */
/* Bit 4: Not used */
#define RXBCTRL_RXM_SHIFT (5) /* Bits 5-6: Receive Buffer Operating Mode bits */
#define RXBCTRL_RXM_MASK (0x3 << RXBCTRL_RXM_SHIFT)
#define RXBCTRL_RXM_ALLMSG (3 << RXBCTRL_RXM_SHIFT) /* 11: Turn mask/filters off; receive any message */
#define RXBCTRL_RXM_ALLVALID (0 << RXBCTRL_RXM_SHIFT) /* 00: Receive all valid msgs using (STD or EXT) that meet filter criteria */
/* Bit 7: Not used */
/* N.B.: In the datasheet DS21801D the file RXM of RXBnCTRL could to assume
drivers/can/mcp2515.c: mcp2515 driver optimizations.
2019-04-12 19:37:08 +02:00
* the value 01 and 10 to receive only STD or EXT msgs respectively.
* But in a more recent datasheet DS20001801H it was removed.
*/
Add Microchip MCP2515 CAN Bus controller driver
2017-05-23 19:28:52 +02:00
/* RXB1CTRL – RECEIVE BUFFER 1 CONTROL */
#define RXB1CTRL_FILHIT_SHIFT (0) /* Filter Hit bits - indicates which acceptance filter enabled reception of message */
#define RXB1CTRL_FILHIT_MASK (0x7 << RXB0CTRL_FILHIT_SHIFT)
#define RXB1CTRL_FILHIT_F5 (5 << RXB1CTRL_FILHIT_SHIFT) /* Acceptance Filter 5 (RXF5) */
#define RXB1CTRL_FILHIT_F4 (4 << RXB1CTRL_FILHIT_SHIFT) /* Acceptance Filter 4 (RXF4) */
#define RXB1CTRL_FILHIT_F3 (3 << RXB1CTRL_FILHIT_SHIFT) /* Acceptance Filter 3 (RXF3) */
#define RXB1CTRL_FILHIT_F2 (2 << RXB1CTRL_FILHIT_SHIFT) /* Acceptance Filter 2 (RXF2) */
#define RXB1CTRL_FILHIT_F1 (1 << RXB1CTRL_FILHIT_SHIFT) /* Acceptance Filter 1 (RXF1) (Only if BUKT bit set in RXB0CTRL) */
#define RXB1CTRL_FILHIT_F0 (0 << RXB1CTRL_FILHIT_SHIFT) /* Acceptance Filter 0 (RXF0) (Only if BUKT bit set in RXB0CTRL) */
/* BFPCTRL – RXnBF PIN CONTROL AND STATUS */
#define BFPCTRL_B0BFM (1 << 0) /* Bit 0: RX0BF Pin Operation Mode bit */
#define BFPCTRL_B1BFM (1 << 1) /* Bit 1: RX1BF Pin Operation Mode bit */
#define BFPCTRL_B0BFE (1 << 2) /* Bit 2: RX0BF Pin Function Enable bit */
#define BFPCTRL_B1BFE (1 << 3) /* Bit 3: RX1BF Pin Function Enable bit */
#define BFPCTRL_B0BFS (1 << 4) /* Bit 4: RX0BF Pin State bit (Digital Output mode only) */
#define BFPCTRL_B1BFS (1 << 5) /* Bit 5: RX1BF Pin State bit (Digital Output mode only) */
/* Bits 6-7: Not used */
/* RXBnSIDH – RECEIVE BUFFER n STANDARD IDENTIFIER HIGH */
#define RXBSIDH_SID_MASK 0xff /* Standard Identifier bits <10:3> */
/* RXBnSIDL – RECEIVE BUFFER n STANDARD IDENTIFIER LOW */
#define RXBSIDL_SID_SHIFT (5) /* Bits 5-7: Standard Identifier bits <2:0> */
#define RXBSIDL_SID_MASK (0x7 << RXBSIDL_SID_SHIFT)
#define RXBSIDL_SRR (1 << 4) /* Bit 4: Standard Frame Remote Transmit Request bit (valid only if IDE bit = '0')*/
#define RXBSIDL_IDE (1 << 3) /* Bit 3: Extended Identifier Message received */
/* Bit 2: Not used */
#define RXBSIDL_EID_SHIFT (0) /* Bits 0-1: Extended Identifier bits <17:16> */
#define RXBSIDL_EID_MASK (0x03 << RXBSIDL_EID_SHIFT)
/* RXBnEID8 – RECEIVE BUFFER n EXTENDED IDENTIFIER HIGH */
#define RXBEID8_EID_MASK 0xff /* Bits 0-7: Extended Identifier bits <15:8> */
/* RXBnEID0 – RECEIVE BUFFER n EXTENDED IDENTIFIER LOW */
#define RXBEID0_EID_MASK 0xff /* Bits 0-7: Extended Identifier bits <7:0> */
/* RXBnDLC – RECEIVE BUFFER n DATA LENGHT CODE */
#define RXBDLC_DLC_SHIFT (0) /* Bits 0-3: Data Length Code <3:0> bits */
#define RXBDLC_DLC_MASK (0xf << RXBDLC_DLC_SHIFT)
#define RXBDLC_RB0 (1 << 4) /* Bit 4: Reserved bit 0 */
#define RXBDLC_RB1 (1 << 5) /* Bit 5: Reserved bit 1 */
#define RXBDLC_RTR (1 << 6) /* Bit 6: Remote Transmission Request bit */
/* Bit 7: Not used */
/* RXFnSIDH – FILTER n STANDARD IDENTIFIER HIGH */
#define RXFSIDH_SID_MASK 0xff /* Standard Identifier Filter bits <10:3> */
/* RXFnSIDL – FILTER n STANDARD IDENTIFIER LOW */
#define RXFSIDL_EID_SHIFT (0) /* Bit 0-1: Extended Identifier Filter bits <17:16> */
#define RXFSIDL_EID_MASK (3 << RXFSIDL_EID_SHIFT)
#define RXFSIDL_EXIDE (1 << 3) /* Bit 3: Extended Identifier Enable bit */
#define RXFSIDL_SID_SHIFT (5) /* Bits 5-7: Standard Identifier Filter bits <2:0> */
#define RXFSIDL_SID_MASK (0x7 << RXFSIDL_SID_SHIFT)
/* RXFnEID8 – FILTER n EXTENDED IDENTIFIER HIGH */
#define RXFEID8_EID_MASK 0xff /* Extended Identifier bits <15:8> */
/* RXFnEID0 – FILTER n EXTENDED IDENTIFIER LOW */
#define RXFEID0_EID_MASK 0xff /* Extended Identifier bits <7:0> */
/* RXMnSIDH – MASK n STANDARD IDENTIFIER HIGH */
#define RXMSIDH_SID_MASK 0xff /* Standard Identifier Mask bits <10:3> */
/* RXMnSIDL – MASK n STANDARD IDENTIFIER LOW */
#define RXMSIDL_EID_SHIFT (0) /* Bits 0-1: Extended Identifier Mask bits <17:16> */
#define RXMSIDL_EID_MASK (3 << RXMSIDH_EID_SHIFT)
#define RXMSIDL_SID_SHIFT (5) /* Bits 5-7: Standard Identifier Mask bits <2:0> */
#define RXMSIDL_MASK (7 << RXMSIDH_SID_SHIFT)
/* RXMnEID8 – MASK n EXTENDED IDENTIFIER HIGH */
#define RXMEID8_EID_MASK 0xff /* Extended Identifier bits <15:8> */
/* RXMnEID0 – MASK n EXTENDED IDENTIFIER LOW */
#define RXMEID0_EID_MASK 0xff /* Extended Identifier Mask bits <7:0> */
/* CNF1 – CONFIGURATION 1 */
#define CNF1_BRP_SHIFT (0) /* Bits 0-5: Baud Rate Prescaler bits <5:0>, TQ = 2 x (BRP + 1)/Fosc */
#define CNF1_BRP_MASK (0x3f << CNF1_BRP_SHIFT)
#define CNF1_SJW_SHIFT (6) /* Bit 6-7: Synchronization Jump Width Length bits <1:0> */
#define CNF1_SJW_MASK (3 << CNF1_SJW_SHIFT)
# define CNF1_SJW_4xTQ (3 << CNF1_SJW_SHIFT) /* Length = 4 x TQ */
# define CNF1_SJW_3xTQ (2 << CNF1_SJW_SHIFT) /* Length = 3 x TQ */
# define CNF1_SJW_2xTQ (1 << CNF1_SJW_SHIFT) /* Length = 2 x TQ */
# define CNF1_SJW_1xTQ (0 << CNF1_SJW_SHIFT) /* Length = 1 x TQ */
/* CNF2 – CONFIGURATION 2 */
#define CNF2_PRSEG_SHIFT (0) /* Bits 0-2: Propagation Segment Length bits <2:0>, (PRSEG + 1) x TQ */
#define CNF2_PRSEG_MASK (7 << CNF2_PRSEG_SHIFT)
#define CNF2_PHSEG1_SHIFT (3) /* Bits 3-5: PS1 Length bits <2:0>, (PHSEG1 + 1) x TQ */
#define CNF2_PHSEG1_MASK (7 << CNF2_PHSEG1_SHIFT)
#define CNF2_SAM (1 << 6) /* Bit 6: Sample Point Configuration bit */
#define CNF2_BTLMODE (1 << 7) /* Bit 7: PS2 Bit Time Length bit */
/* CNF3 - CONFIGURATION 3 */
#define CNF3_PHSEG2_SHIFT (0) /* Bits 0-2: PS2 Length bits<2:0>, (PHSEG2 + 1) x TQ */
#define CNF3_PHSEG2_MASK (7 << CNF3_PHSEG2_SHIFT)
#define CNF3_WAKFIL (1 << 6) /* Bit 3: Wake-up Filter bit */
#define CNF3_SOF (1 << 7) /* Bit 7: Start-of-Frame signal bit */
/* TEC – TRANSMIT ERROR COUNTER */
#define TEC_MASK 0xff /* Transmit Error Count bits <7:0> */
/* REC – RECEIVER ERROR COUNTER */
#define REC_MASK 0xff /* Receive Error Count bits <7:0> */
/* EFLG – ERROR FLAG */
#define EFLG_EWARN (1 << 0) /* Bit 0: Error Warning Flag bit */
#define EFLG_RXWAR (1 << 1) /* Bit 1: Receive Error Warning Flag bit */
#define EFLG_TXWAR (1 << 2) /* Bit 2: Transmit Error Warning Flag bit */
#define EFLG_RXEP (1 << 3) /* Bit 3: Receive Error-Passive Flag bit */
#define EFLG_TXEP (1 << 4) /* Bit 4: Transmit Error-Passive Flag bit */
#define EFLG_TXBO (1 << 5) /* Bit 5: Bus-Off Error Flag bit */
#define EFLG_RX0OVR (1 << 6) /* Bit 6: Receive Buffer 0 Overflow Flag bit */
#define EFLG_RX1OVR (1 << 7) /* Bit 7: Receive Buffer 1 Overflow Flag bit */
/* CANINTE/CANINTF – INTERRUPT ENABLE/FLAG */
#define MCP2515_INT_RX0 (1 << 0) /* Bit 0: Receive Buffer 0 Full Interrupt Enable bit */
#define MCP2515_INT_RX1 (1 << 1) /* Bit 1: Receive Buffer 1 Full Interrupt Enable bit */
#define MCP2515_INT_TX0 (1 << 2) /* Bit 2: Transmit Buffer 0 Empty Interrupt Enable bit */
#define MCP2515_INT_TX1 (1 << 3) /* Bit 3: Transmit Buffer 1 Empty Interrupt Enable bit */
#define MCP2515_INT_TX2 (1 << 4) /* Bit 4: Transmit Buffer 2 Empty Interrupt Enable bit */
#define MCP2515_INT_ERR (1 << 5) /* Bit 5: Error Interrupt Enable bit (multiple sources in EFLG register) */
#define MCP2515_INT_WAK (1 << 6) /* Bit 6: Wakeup Interrupt Enable bit */
#define MCP2515_INT_MERR (1 << 7) /* Bit 7: Message Error Interrupt Enable bit */
/* MCP2515 SPI Instruction/Command byte */
#define MCP2515_RESET 0xC0
#define MCP2515_READ 0x03
#define MCP2515_READ_RX0 0x90
#define MCP2515_READ_RX1 0x94
#define MCP2515_WRITE 0x02
#define MCP2515_LOAD_TX0 0x40
#define MCP2515_LOAD_TX1 0x42
#define MCP2515_LOAD_TX2 0x44
drivers/can/mcp2515.c: mcp2515 driver optimizations.
2019-04-12 19:37:08 +02:00
#define MCP2515_LOAD_TXB(n) (0x40 + 2 * (n))
#define MCP2515_READ_RXB(n) (((n) == 0) ? 0x90 : 0x94)
Add Microchip MCP2515 CAN Bus controller driver
2017-05-23 19:28:52 +02:00
#define MCP2515_RTS_TX0 0x81
#define MCP2515_RTS_TX1 0x82
#define MCP2515_RTS_TX2 0x84
drivers/can/mcp2515.c: mcp2515 driver optimizations.
2019-04-12 19:37:08 +02:00
#define MCP2515_RTS(x) (0x81+x)
Add Microchip MCP2515 CAN Bus controller driver
2017-05-23 19:28:52 +02:00
#define MCP2515_RTS_ALL 0x87
#define MCP2515_READ_STATUS 0xA0
#define MCP2515_RX_STATUS 0xB0
#define MCP2515_BITMOD 0x05
/* CANCTRL register will be 0x87 after reset and in Conf. Mode */
#define DEFAULT_CANCTRL_CONFMODE 0x87
/* Crystal Frequency used on MCP2515 board */
drivers/can/mcp2515.c: Fix MCP2515 compile errors.
2019-03-20 14:48:40 +01:00
#define MCP2515_CANCLK_FREQUENCY CONFIG_MCP2515_CLK_FREQUENCY
Add Microchip MCP2515 CAN Bus controller driver
2017-05-23 19:28:52 +02:00
MCP2515: Changes from review of last PR
2017-05-23 20:22:49 +02:00
#endif /* __DRIVERS_CAN_MCP2514_H */
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