/**************************************************************************** * drivers/can/mcp2515.c * * Copyright (C) 2017 Alan Carvalho de Assis. All rights reserved. * Author: Alan Carvalho de Assis * * 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 /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* 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 * the value 01 and 10 to receive only STD or EXT msgs respectively. * But in a more recent datasheet DS20001801H it was removed. */ /* 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 LENGTH 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 #define MCP2515_LOAD_TXB(n) (0x40 + 2 * (n)) #define MCP2515_READ_RXB(n) (((n) == 0) ? 0x90 : 0x94) #define MCP2515_RTS_TX0 0x81 #define MCP2515_RTS_TX1 0x82 #define MCP2515_RTS_TX2 0x84 #define MCP2515_RTS(x) (0x81+x) #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 */ #define MCP2515_CANCLK_FREQUENCY CONFIG_MCP2515_CLK_FREQUENCY #endif /* __DRIVERS_CAN_MCP2514_H */