Bosch Appliances TTCAN user manual 26/77 11.11.02

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TTCAN

User’s Manual

Revision 1.6

manual_about.fm

NewDat New Data

one The Message Handler or the CPU has written new data into the data por- tion of this Message Object.

zero No new data has been written into the data portion of this Message Object by the Message Handler since last time this flag was cleared by the CPU.

MsgLst Message Lost (only valid for Message Objects with direction = receive)

one The Message Handler stored a new message into this object when New- Dat was still set, the CPU has lost a message.

zero No message lost since last time this bit was reset by the CPU.

RxIE Receive Interrupt Enable

one IntPnd will be set after a successful reception of a frame.

zero IntPnd will be left unchanged after a successful reception of a frame.

TxIE Transmit Interrupt Enable

one IntPnd will be set after a successful transmission of a frame.

zero IntPnd will be left unchanged after the successful transmission of a frame.

IntPnd Interrupt Pending

one This message object is the source of an interrupt. The Interrupt Identifier in the Interrupt Register will point to this message object if there is no other interrupt source with higher priority.

zero This message object is not the source of an interrupt.

RmtEn Remote Enable

one At the reception of a Remote Frame, TxRqst is set.

zero At the reception of a Remote Frame, TxRqst is left unchanged.

TxRqst Transmit Request

one The transmission of this Message Object is requested and is not yet done. zero This Message Object is not waiting for transmission.

Note : In TTCAN mode, there are two types of transmit Message Objects. When NewDat is set and TxRqst is reset, the message will be transmitted periodically at each Transmit_Trigger for this message, without changing NewDat or TxRqst. When both NewDat and TxRqst are set, the message will be transmitted once at a Transmit_Trigger for this message, inside an arbitrating time window. When the transmission was not successful, it will be repeated at the next Transmit_Trigger for this message. When the transmission was successful, NewDat is reset.

DLC3-0Data Length Code

0-8Data Frame has 0-8 data bytes. 9-15Data Frame has 8 data bytes

Note : The Data Length Code of a Message Object must be defined the same as in all the correspond- ing objects with the same identifier at other nodes. When the Message Handler stores a data frame, it will write the DLC to the value given by the received message.

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Contents User’s Manual Robert Bosch GmbHCopyright Notice and Proprietary Information Conventions Scope References Terms and Abbreviations Functional Overview 2.2. Block Diagram Operating ModesChange Control Can Application Ttcan Message Handling Ttcan ConfigurationTtcan Schedule Initialisation List of FiguresConventions Change Control Current StatusChange History Helvetica boldTerm Meaning Functional Overview Cpuifc TtcanOperating Modes Software Initialisation Can Message TransferTest Register addresses 0x0B & 0x0A Disabled Automatic RetransmissionTest Mode Ttcan =1 Loop Back Mode Loop Back combined with Silent ModeNo Message RAM Mode Software control of Pin CantxAddress Name Reset Value Hardware Reset Description Ttcan Register SummaryEIE CCEDAR SIENo Error Status Register addresses 0x03Bit Timing Register addresses 0x07 Error Counter addresses 0x05Status Interrupts BRP Extension Register addresses 0x0D & 0x0C Arb IFx Command Mask RegistersDirection = Write Control IFx Command Request RegistersDirection = Read ClrIntPndIFx Message Buffer Registers BusyMessage Number IFx Mask RegistersMessage Object in the Message Memory IFx Message Control RegistersIFx Data a and Data B Registers Xtd ID28-0Msk28-0 Dir26/77 11.11.02 Message Handler Registers Interrupt Register addresses 0x09Interrupt Pending Registers Transmission Request RegistersNew Data Registers Trigger Number 2 IF1 Data B1 and B2 Registers for Trigger Memory AccessMessage Valid 1 Register TimeMark At CycleCount mod TT Operation Mode Register addresses 0x29Type MPr2-0TEW EecsRdlc Bark TT Interrupt Enable Register addresses 0x31CCM AppWdLGTW CELGTE SWERTO TUR Numerator Configuration Low Register addresses 0x57 TT Error Level Register addresses 0x3F & 0x3ETT Cycle Count Register addresses 0x3D & 0x3C TT StopWatch Register addresses 0x61 TUR Denominator Configuration Register addresses 0x59TUR Numerator Actual Registers addresses 0x5B & 0x5A Ecal QCSQgtp EgtfECS TMCDET SWSEPE TMG40/77 11.11.02 Internal can Message Handling Data Transfer Between IFx Registers and Message RAMTransmission of Messages in Event Driven can Communication StartReception of Remote Frame Acceptance Filtering of Received MessagesReception of Data Frame Storing Received Messages in Fifo BuffersReceive / Transmit Priority Configuration of the ModuleBit Time and Bit Rate Sync PropSeg PhaseSeg1 PhaseSeg21 Configuration of the Bit Timing Canclk input Nominal can Bit TimePropagation Time Segment BRPPhase Buffer Segments and Synchronisation Synchronisation on late and early Edges Filtering of Short Dominant Spikes Oscillator Tolerance Range 1.5 Configuration of the can Protocol ControllerCalculation of the Bit Timing Parameters Example for Bit Timing at high Baudrate Example for Bit Timing at low Baudrate 2 Configuration of the Message Memory2.1 Configuration of a Transmit Object for Data Frames 2.2 Configuration of a Single Receive Object for Data Frames2.3 Configuration of a Fifo Buffer Can Communication Handling of InterruptsUpdating a Transmit Object Requesting New Data for a Receive Object Changing a Transmit ObjectReading Received Messages Reading from a Fifo BufferCPU Handling of a Fifo Buffer Interrupt Driven Ttcan Configuration Ttcan TimingMessage Scheduling TUR510 125000 32.5 100/12 529/17 Trigger Memory 63/77 11.11.02 Periodic Transmit Message Message ObjectsReference Message Potential Time Masters Event Driven Transmit MessageTime Slaves Periodic Messages Ttcan Message Handling Message ReceptionMessage Transmission Event Driven MessagesTtcan Gap Control StopwatchCycle Time and Global Time Synchronisation Ttcan Interrupt and Error Handling Previous RefMarkConfiguration Example Register Remark Rdlc & TEW & CCMType & Msg & CycleCode RTO , TM , L2 , TTMode3 74/77 11.11.02 Customer Interface GenericInterface Busy = ‘1’ Busy = ‘0’ Timing of the Wait output signalCanclk Canwaitb Interrupt TimingEOF
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