e0ce8a7265
This is a CPC CAN USB driver. Just some comments: cpcusb.h and cpc-usb_drv.c: Essential driver source code sja2m16c_2.c: Helper for converting bitrate timings cpc.h: Structures and definition needed to communicate with the device From: Sebastian Haas <haas@ems-wuensche.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
441 lines
16 KiB
C
441 lines
16 KiB
C
/*
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* CPC CAN Interface Definitions
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*
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* Copyright (C) 2000-2008 EMS Dr. Thomas Wuensche
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef CPC_HEADER
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#define CPC_HEADER
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// the maximum length of the union members within a CPC_MSG
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// this value can be defined by the customer, but has to be
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// >= 64 bytes
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// however, if not defined before, we set a length of 64 byte
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#if !defined(CPC_MSG_LEN) || (CPC_MSG_LEN < 64)
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#undef CPC_MSG_LEN
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#define CPC_MSG_LEN 64
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#endif
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// check the operating system used
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#ifdef _WIN32 // running a Windows OS
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// define basic types on Windows platforms
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#ifdef _MSC_VER // Visual Studio
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typedef unsigned __int8 u8;
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typedef unsigned __int16 u16;
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typedef unsigned __int32 u32;
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#else // Borland Compiler
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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#endif
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// on Windows OS we use a byte alignment of 1
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#pragma pack(push, 1)
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// set the calling conventions for the library function calls
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#define CALL_CONV __stdcall
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#else
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// Kernel headers already define this types
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#ifndef __KERNEL__
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// define basic types
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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#endif
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// Linux does not use this calling convention
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#define CALL_CONV
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#endif
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// Transmission of events from CPC interfaces to PC can be individually
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// controlled per event type. Default state is: don't transmit
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// Control values are constructed by bit-or of Subject and Action
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// and passed to CPC_Control()
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// Control-Values for CPC_Control() Command Subject Selection
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#define CONTR_CAN_Message 0x04
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#define CONTR_Busload 0x08
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#define CONTR_CAN_State 0x0C
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#define CONTR_SendAck 0x10
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#define CONTR_Filter 0x14
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#define CONTR_CmdQueue 0x18 // reserved, do not use
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#define CONTR_BusError 0x1C
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// Control Command Actions
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#define CONTR_CONT_OFF 0
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#define CONTR_CONT_ON 1
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#define CONTR_SING_ON 2
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// CONTR_SING_ON doesn't change CONTR_CONT_ON state, so it should be
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// read as: transmit at least once
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// defines for confirmed request
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#define DO_NOT_CONFIRM 0
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#define DO_CONFIRM 1
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// event flags
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#define EVENT_READ 0x01
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#define EVENT_WRITE 0x02
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// Messages from CPC to PC contain a message object type field.
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// The following message types are sent by CPC and can be used in
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// handlers, others should be ignored.
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#define CPC_MSG_T_RESYNC 0 // Normally to be ignored
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#define CPC_MSG_T_CAN 1 // CAN data frame
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#define CPC_MSG_T_BUSLOAD 2 // Busload message
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#define CPC_MSG_T_STRING 3 // Normally to be ignored
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#define CPC_MSG_T_CONTI 4 // Normally to be ignored
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#define CPC_MSG_T_MEM 7 // Normally not to be handled
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#define CPC_MSG_T_RTR 8 // CAN remote frame
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#define CPC_MSG_T_TXACK 9 // Send acknowledge
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#define CPC_MSG_T_POWERUP 10 // Power-up message
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#define CPC_MSG_T_CMD_NO 11 // Normally to be ignored
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#define CPC_MSG_T_CAN_PRMS 12 // Actual CAN parameters
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#define CPC_MSG_T_ABORTED 13 // Command aborted message
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#define CPC_MSG_T_CANSTATE 14 // CAN state message
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#define CPC_MSG_T_RESET 15 // used to reset CAN-Controller
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#define CPC_MSG_T_XCAN 16 // XCAN data frame
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#define CPC_MSG_T_XRTR 17 // XCAN remote frame
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#define CPC_MSG_T_INFO 18 // information strings
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#define CPC_MSG_T_CONTROL 19 // used for control of interface/driver behaviour
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#define CPC_MSG_T_CONFIRM 20 // response type for confirmed requests
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#define CPC_MSG_T_OVERRUN 21 // response type for overrun conditions
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#define CPC_MSG_T_KEEPALIVE 22 // response type for keep alive conditions
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#define CPC_MSG_T_CANERROR 23 // response type for bus error conditions
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#define CPC_MSG_T_DISCONNECTED 24 // response type for a disconnected interface
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#define CPC_MSG_T_ERR_COUNTER 25 // RX/TX error counter of CAN controller
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#define CPC_MSG_T_FIRMWARE 100 // response type for USB firmware download
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// Messages from the PC to the CPC interface contain a command field
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// Most of the command types are wrapped by the library functions and have therefore
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// normally not to be used.
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// However, programmers who wish to circumvent the library and talk directly
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// to the drivers (mainly Linux programmers) can use the following
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// command types:
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#define CPC_CMD_T_CAN 1 // CAN data frame
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#define CPC_CMD_T_CONTROL 3 // used for control of interface/driver behaviour
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#define CPC_CMD_T_CAN_PRMS 6 // set CAN parameters
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#define CPC_CMD_T_CLEARBUF 8 // clears input queue; this is depricated, use CPC_CMD_T_CLEAR_MSG_QUEUE instead
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#define CPC_CMD_T_INQ_CAN_PARMS 11 // inquire actual CAN parameters
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#define CPC_CMD_T_FILTER_PRMS 12 // set filter parameter
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#define CPC_CMD_T_RTR 13 // CAN remote frame
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#define CPC_CMD_T_CANSTATE 14 // CAN state message
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#define CPC_CMD_T_XCAN 15 // XCAN data frame
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#define CPC_CMD_T_XRTR 16 // XCAN remote frame
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#define CPC_CMD_T_RESET 17 // used to reset CAN-Controller
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#define CPC_CMD_T_INQ_INFO 18 // miscellanous information strings
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#define CPC_CMD_T_OPEN_CHAN 19 // open a channel
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#define CPC_CMD_T_CLOSE_CHAN 20 // close a channel
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#define CPC_CMD_T_CNTBUF 21 // this is depricated, use CPC_CMD_T_INQ_MSG_QUEUE_CNT instead
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#define CPC_CMD_T_CAN_EXIT 200 // exit the CAN (disable interrupts; reset bootrate; reset output_cntr; mode = 1)
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#define CPC_CMD_T_INQ_MSG_QUEUE_CNT CPC_CMD_T_CNTBUF // inquires the count of elements in the message queue
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#define CPC_CMD_T_INQ_ERR_COUNTER 25 // request the CAN controllers error counter
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#define CPC_CMD_T_CLEAR_MSG_QUEUE CPC_CMD_T_CLEARBUF // clear CPC_MSG queue
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#define CPC_CMD_T_CLEAR_CMD_QUEUE 28 // clear CPC_CMD queue
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#define CPC_CMD_T_FIRMWARE 100 // reserved, must not be used
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#define CPC_CMD_T_USB_RESET 101 // reserved, must not be used
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#define CPC_CMD_T_WAIT_NOTIFY 102 // reserved, must not be used
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#define CPC_CMD_T_WAIT_SETUP 103 // reserved, must not be used
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#define CPC_CMD_T_ABORT 255 // Normally not to be used
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// definitions for CPC_MSG_T_INFO
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// information sources
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#define CPC_INFOMSG_T_UNKNOWN_SOURCE 0
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#define CPC_INFOMSG_T_INTERFACE 1
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#define CPC_INFOMSG_T_DRIVER 2
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#define CPC_INFOMSG_T_LIBRARY 3
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// information types
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#define CPC_INFOMSG_T_UNKNOWN_TYPE 0
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#define CPC_INFOMSG_T_VERSION 1
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#define CPC_INFOMSG_T_SERIAL 2
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// definitions for controller types
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#define PCA82C200 1 // Philips basic CAN controller, replaced by SJA1000
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#define SJA1000 2 // Philips basic CAN controller
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#define AN82527 3 // Intel full CAN controller
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#define M16C_BASIC 4 // M16C controller running in basic CAN (not full CAN) mode
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// channel open error codes
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#define CPC_ERR_NO_FREE_CHANNEL -1 // no more free space within the channel array
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#define CPC_ERR_CHANNEL_ALREADY_OPEN -2 // the channel is already open
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#define CPC_ERR_CHANNEL_NOT_ACTIVE -3 // access to a channel not active failed
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#define CPC_ERR_NO_DRIVER_PRESENT -4 // no driver at the location searched by the library
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#define CPC_ERR_NO_INIFILE_PRESENT -5 // the library could not find the inifile
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#define CPC_ERR_WRONG_PARAMETERS -6 // wrong parameters in the inifile
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#define CPC_ERR_NO_INTERFACE_PRESENT -7 // 1. The specified interface is not connected
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// 2. The interface (mostly CPC-USB) was disconnected upon operation
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#define CPC_ERR_NO_MATCHING_CHANNEL -8 // the driver couldn't find a matching channel
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#define CPC_ERR_NO_BUFFER_AVAILABLE -9 // the driver couldn't allocate buffer for messages
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#define CPC_ERR_NO_INTERRUPT -10 // the requested interrupt couldn't be claimed
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#define CPC_ERR_NO_MATCHING_INTERFACE -11 // no interface type related to this channel was found
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#define CPC_ERR_NO_RESOURCES -12 // the requested resources could not be claimed
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#define CPC_ERR_SOCKET -13 // error concerning TCP sockets
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// init error codes
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#define CPC_ERR_WRONG_CONTROLLER_TYPE -14 // wrong CAN controller type within initialization
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#define CPC_ERR_NO_RESET_MODE -15 // the controller could not be set into reset mode
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#define CPC_ERR_NO_CAN_ACCESS -16 // the CAN controller could not be accessed
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// transmit error codes
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#define CPC_ERR_CAN_WRONG_ID -20 // the provided CAN id is too big
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#define CPC_ERR_CAN_WRONG_LENGTH -21 // the provided CAN length is too long
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#define CPC_ERR_CAN_NO_TRANSMIT_BUF -22 // the transmit buffer was occupied
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#define CPC_ERR_CAN_TRANSMIT_TIMEOUT -23 // The message could not be sent within a
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// specified time
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// other error codes
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#define CPC_ERR_SERVICE_NOT_SUPPORTED -30 // the requested service is not supported by the interface
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#define CPC_ERR_IO_TRANSFER -31 // a transmission error down to the driver occurred
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#define CPC_ERR_TRANSMISSION_FAILED -32 // a transmission error down to the interface occurred
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#define CPC_ERR_TRANSMISSION_TIMEOUT -33 // a timeout occurred within transmission to the interface
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#define CPC_ERR_OP_SYS_NOT_SUPPORTED -35 // the operating system is not supported
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#define CPC_ERR_UNKNOWN -40 // an unknown error ocurred (mostly IOCTL errors)
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#define CPC_ERR_LOADING_DLL -50 // the library 'cpcwin.dll' could not be loaded
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#define CPC_ERR_ASSIGNING_FUNCTION -51 // the specified function could not be assigned
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#define CPC_ERR_DLL_INITIALIZATION -52 // the DLL was not initialized correctly
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#define CPC_ERR_MISSING_LICFILE -55 // the file containing the licenses does not exist
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#define CPC_ERR_MISSING_LICENSE -56 // a required license was not found
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// CAN state bit values. Ignore any bits not listed
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#define CPC_CAN_STATE_BUSOFF 0x80
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#define CPC_CAN_STATE_ERROR 0x40
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// Mask to help ignore undefined bits
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#define CPC_CAN_STATE_MASK 0xc0
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// CAN-Message representation in a CPC_MSG
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// Message object type is CPC_MSG_T_CAN or CPC_MSG_T_RTR
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// or CPC_MSG_T_XCAN or CPC_MSG_T_XRTR
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typedef struct CPC_CAN_MSG {
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u32 id;
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u8 length;
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u8 msg[8];
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} CPC_CAN_MSG_T;
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// representation of the CAN parameters for the PCA82C200 controller
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typedef struct CPC_PCA82C200_PARAMS {
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u8 acc_code; // Acceptance-code for receive, Standard: 0
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u8 acc_mask; // Acceptance-mask for receive, Standard: 0xff (everything)
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u8 btr0; // Bus-timing register 0
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u8 btr1; // Bus-timing register 1
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u8 outp_contr; // Output-control register
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} CPC_PCA82C200_PARAMS_T;
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// representation of the CAN parameters for the SJA1000 controller
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typedef struct CPC_SJA1000_PARAMS {
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u8 mode; // enables single or dual acceptance filtering
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u8 acc_code0; // Acceptance-code for receive, Standard: 0
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u8 acc_code1;
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u8 acc_code2;
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u8 acc_code3;
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u8 acc_mask0; // Acceptance-mask for receive, Standard: 0xff (everything)
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u8 acc_mask1;
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u8 acc_mask2;
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u8 acc_mask3;
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u8 btr0; // Bus-timing register 0
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u8 btr1; // Bus-timing register 1
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u8 outp_contr; // Output-control register
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} CPC_SJA1000_PARAMS_T;
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// representation of the CAN parameters for the M16C controller
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// in basic CAN mode (means no full CAN)
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typedef struct CPC_M16C_BASIC_PARAMS {
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u8 con0;
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u8 con1;
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u8 ctlr0;
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u8 ctlr1;
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u8 clk;
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u8 acc_std_code0;
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u8 acc_std_code1;
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u8 acc_ext_code0;
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u8 acc_ext_code1;
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u8 acc_ext_code2;
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u8 acc_ext_code3;
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u8 acc_std_mask0;
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u8 acc_std_mask1;
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u8 acc_ext_mask0;
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u8 acc_ext_mask1;
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u8 acc_ext_mask2;
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u8 acc_ext_mask3;
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} CPC_M16C_BASIC_PARAMS_T;
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// CAN params message representation
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typedef struct CPC_CAN_PARAMS {
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u8 cc_type; // represents the controller type
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union {
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CPC_M16C_BASIC_PARAMS_T m16c_basic;
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CPC_SJA1000_PARAMS_T sja1000;
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CPC_PCA82C200_PARAMS_T pca82c200;
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} cc_params;
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} CPC_CAN_PARAMS_T;
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// the following structures are slightly different for Windows and Linux
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// To be able to use the 'Select' mechanism with Linux the application
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// needs to know the devices file desciptor.
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// This mechanism is not implemented within Windows and the file descriptor
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// is therefore not needed
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#ifdef _WIN32
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// CAN init params message representation
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typedef struct CPC_INIT_PARAMS {
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CPC_CAN_PARAMS_T canparams;
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} CPC_INIT_PARAMS_T;
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#else// Linux
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// CHAN init params representation
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typedef struct CPC_CHAN_PARAMS {
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int fd;
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} CPC_CHAN_PARAMS_T;
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// CAN init params message representation
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typedef struct CPC_INIT_PARAMS {
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CPC_CHAN_PARAMS_T chanparams;
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CPC_CAN_PARAMS_T canparams;
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} CPC_INIT_PARAMS_T;
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#endif
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// structure for confirmed message handling
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typedef struct CPC_CONFIRM {
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u8 result; // error code
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} CPC_CONFIRM_T;
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// structure for information requests
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typedef struct CPC_INFO {
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u8 source; // interface, driver or library
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u8 type; // version or serial number
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char msg[CPC_MSG_LEN - 2]; // string holding the requested information
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} CPC_INFO_T;
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// OVERRUN ///////////////////////////////////////
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// In general two types of overrun may occur.
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// A hardware overrun, where the CAN controller
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// lost a message, because the interrupt was
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// not handled before the next messgae comes in.
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// Or a software overrun, where i.e. a received
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// message could not be stored in the CPC_MSG
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// buffer.
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// After a software overrun has occurred
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// we wait until we have CPC_OVR_GAP slots
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// free in the CPC_MSG buffer.
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#define CPC_OVR_GAP 10
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// Two types of software overrun may occur.
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// A received CAN message or a CAN state event
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// can cause an overrun.
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// Note: A CPC_CMD which would normally store
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// its result immediately in the CPC_MSG
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// queue may fail, because the message queue is full.
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// This will not generate an overrun message, but
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// will halt command execution, until this command
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// is able to store its message in the message queue.
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#define CPC_OVR_EVENT_CAN 0x01
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#define CPC_OVR_EVENT_CANSTATE 0x02
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#define CPC_OVR_EVENT_BUSERROR 0x04
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// If the CAN controller lost a message
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// we indicate it with the highest bit
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// set in the count field.
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#define CPC_OVR_HW 0x80
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// structure for overrun conditions
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typedef struct {
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u8 event;
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u8 count;
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} CPC_OVERRUN_T;
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// CAN errors ////////////////////////////////////
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// Each CAN controller type has different
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// registers to record errors.
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// Therefor a structure containing the specific
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// errors is set up for each controller here
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// SJA1000 error structure
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// see the SJA1000 datasheet for detailed
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// explanation of the registers
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typedef struct CPC_SJA1000_CAN_ERROR {
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u8 ecc; // error capture code register
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u8 rxerr; // RX error counter register
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u8 txerr; // TX error counter register
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} CPC_SJA1000_CAN_ERROR_T;
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// M16C error structure
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// see the M16C datasheet for detailed
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// explanation of the registers
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typedef struct CPC_M16C_CAN_ERROR {
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u8 tbd; // to be defined
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} CPC_M16C_CAN_ERROR_T;
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// structure for CAN error conditions
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#define CPC_CAN_ECODE_ERRFRAME 0x01
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typedef struct CPC_CAN_ERROR {
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u8 ecode;
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struct {
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u8 cc_type; // CAN controller type
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union {
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CPC_SJA1000_CAN_ERROR_T sja1000;
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CPC_M16C_CAN_ERROR_T m16c;
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} regs;
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} cc;
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} CPC_CAN_ERROR_T;
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// Structure containing RX/TX error counter.
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// This structure is used to request the
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// values of the CAN controllers TX and RX
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// error counter.
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typedef struct CPC_CAN_ERR_COUNTER {
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u8 rx;
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u8 tx;
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} CPC_CAN_ERR_COUNTER_T;
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// If this flag is set, transmissions from PC to CPC are protected against loss
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#define CPC_SECURE_TO_CPC 0x01
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// If this flag is set, transmissions from CPC to PC are protected against loss
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#define CPC_SECURE_TO_PC 0x02
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// If this flag is set, the CAN-transmit buffer is checked to be free before sending a message
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#define CPC_SECURE_SEND 0x04
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// If this flag is set, the transmission complete flag is checked
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// after sending a message
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// THIS IS CURRENTLY ONLY IMPLEMENTED IN THE PASSIVE INTERFACE DRIVERS
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#define CPC_SECURE_TRANSMIT 0x08
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// main message type used between library and application
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typedef struct CPC_MSG {
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u8 type; // type of message
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u8 length; // length of data within union 'msg'
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u8 msgid; // confirmation handle
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u32 ts_sec; // timestamp in seconds
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u32 ts_nsec; // timestamp in nano seconds
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union {
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u8 generic[CPC_MSG_LEN];
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CPC_CAN_MSG_T canmsg;
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CPC_CAN_PARAMS_T canparams;
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CPC_CONFIRM_T confirmation;
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CPC_INFO_T info;
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CPC_OVERRUN_T overrun;
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CPC_CAN_ERROR_T error;
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CPC_CAN_ERR_COUNTER_T err_counter;
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u8 busload;
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u8 canstate;
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} msg;
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} CPC_MSG_T;
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#ifdef _WIN32
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#pragma pack(pop) // reset the byte alignment
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#endif
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#endif // CPC_HEADER
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