VCI - Virtual CAN Interface - Ixxat

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Types and structures5.2.5 CANMSGINFOThe data type summarizes various information on CAN messages in a 32-bit value.The value can be addressed either byte-wise or via individual bit fields.typedef union{struct{UINT8 bType;UINT8 bReserved;UINT8 bFlags;UINT8 bAccept;} Bytes;struct{UINT32 type: 8;UINT32 res : 8;UINT32 dlc : 4;UINT32 ovr : 1;UINT32 srr : 1;UINT32 rtr : 1;UINT32 ext : 1;UINT32 afc : 8;} Bits;} CANMSGINFO, *PCANMSGINFO;The information of a CAN message can be addressed byte-wise via the elementBytes. The following fields are defined for this:• Bytes.bType:[in/out] Type of the message. See also Bits.type.• Bytes.bReserved:Reserved. See also Bits.res.• Bytes.bFlags[in/out] Various flags. See also Bits.dlc, Bits.ovr, Bits.srr, Bits.rtr and Bits.ext.• Bytes.bAccept:[out] With receive messages displays which filter has accepted the message.See also Bits.afc.The information of a CAN message can be accessed bit-wise with the elementBits. The following bit fields are defined:• Bits.type:[in/out] Type of the message. The types listed in the following are defined forreceive messages. For transmit messages, only the message typeCAN_MSGTYPE_DATA is currently defined. Other values are not permittedhere.96Copyright IXXAT Automation GmbH C-API Programming Manual, Version 1.5
Types and structuresCAN_MSGTYPE_DATA:Normal message. All regular receive messages are of this type. The field CANMSG.dwMsgIdcontains the ID of the message, the field CANMSG.dwTime the time of reception. The fieldsCANMSG.abData contain according to length (see Bits.dlc) the data bytes of the message.With transmit messages the IDs are to be entered in the field CANMSG.dwMsgId and thedata bytes according to length in the fields CANMSG.abData. The field CANMSG.dwTime isnormally set to 0, unless the message is to be transmitted with a delay. In this case the delaytime is to be specified in ticks. See also the description of the structure CANMSG, or section3.1.3.3.CAN_MSGTYPE_INFO:Information message. This message type is entered in the receive buffers of all activatedmessage channels with certain events or with changes to the status of the controller. Thefield CANMSG.dwMsgId of the message always has the value 0xFFFFFFFF. The field abCANMSG.Data[0] contains one of the following values:Constant MeaningCAN_INFO_START The CAN controller was started. The fieldCANMSG.dwTime contains the relative start time (normally0).CAN_INFO_STOP The CAN controller was stopped. The fieldCANMSG.dwTime contains the value 0.CAN_INFO_RESET The CAN controller was reset. The field CANMSG.dwTimecontains the value 0.CAN_MSGTYPE_ERROR:Error message. This message type is entered in the receive buffers of all activated messagechannels when bus errors occur if the flag CAN_OPMODE_ERRFRAME was specified in theparameter CANMSG.bMode when the function canControlInitialize was called. The fieldCANMSG.dwMsgId of the message always has the value 0xFFFFFFFF. The time of the eventis marked in the field CANMSG.dwTime of the message. The field abData[0] contains one ofthe following values:ConstantMeaningCAN_ERROR_STUFF Bit stuff errorCAN_ERROR_FORM Format errorCAN_ERROR_ACK Acknowledge errorCAN_ERROR_BIT Bit errorCAN_ERROR_CRC CRC errorCAN_ERROR_OTHER Other unspecified errorThe field CANMSG.abData[1] of the message contains the least significant byte of the currentCAN status (see also CANLINESTATUS.dwStatus). The contents of the other data fieldsare undefined.97Copyright IXXAT Automation GmbH C-API Programming Manual, Version 1.5
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System overviewThe VCI server runni
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Device management and device access
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Device management and device access
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Accessing the bus3 Accessing the bu
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Accessing the bus3.1.2.1 Controller
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Accessing the bus3.1.2.2 Message fi
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Accessing the busAs the example sho
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Accessing the busAfter a message ch
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Accessing the busHRESULT hResult;HA
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Accessing the bust zTransmit object
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Accessing the busNormally, the tran
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Accessing the bus3.2.2.1 Controller
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Accessing the busIf the connection
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Interface description4 Interface de
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Interface descriptionReturn value:I
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Interface descriptionpszGuid[out] P
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Interface description4.2.1.2 vciEnu
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Interface descriptionComments:The c
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Page 90 and 91: Types and structures• VciObjectId
Page 92 and 93: Types and structures• wBusCouplin
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Page 98 and 99: Types and structuresCAN_MSGTYPE_STA
Page 100 and 101: Types and structures5.2.7 CANCYCLIC
Page 102 and 103: Types and structures• dwClockFreq
Page 104 and 105: Types and structuresThe information
Page 106: Types and structures• Bits.ovr:[o
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VCI - Virtual CAN Interface - Ixxat

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