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RodModule Class Library

RodModule Class Library. Tom Meyer Iowa State University Meyer@iastate.edu. Context. RodModule is the class library providing driver routines for the ROD VME module. Present Status. ROD has been working in Ames since 1 August. Debugging has covered most of the basic functionality.

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RodModule Class Library

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  1. RodModule Class Library Tom Meyer Iowa State University Meyer@iastate.edu 25 September 2002

  2. Context RodModule is the class library providing driver routines for the ROD VME module. 25 September 2002

  3. Present Status • ROD has been working in Ames since 1 August. • Debugging has covered most of the basic functionality. • Create a primitive and add it to a primitive list • Send a primitive list and retrieve the reply buffer if it exists • Read an unsolicited text buffer • Tools: g++ 2.96, gdb 5.0rh-5 with Insight GUI 5.1.1 (from Red Hat web site) • Some problems have been uncovered • Writing to HPID with auto-increment of HPIA does not increment HPIA. It works fine for reading with auto-increment. Problem exists even with the RCC_Rel_2 vme_test utility. We suspect a hardware problem specific to this board. A work-around exists, but is inefficient. • Block reads and writes do not return correct values and block writes do not increment HPIA. A work-around is to do single word reads. Less efficient, but works. • Program crashes when I delete the RCCVmeInterface object. Since this is the last statement of the program, it is easy to get around by aborting via the debugger just before this is executed. It needs to be understood, though. 25 September 2002

  4. Directory Structure on SBC (rcc0) • /CommonWithDsp • processor.h • smSendTxtBuff.h • txtBuffer.h • comRegDfns.h • memoryPartitions.h • primParams.h • sctStructure.h • utilities.h • vmeAddressMap.h • /CommonForHosts • commandListDefinitions.h • errorCodes.h • flashUtility.h • hostDefinitions.h • primListTableDefinitions.h • /RodCrate • RodModule.h, -.cxx • RodPrimitive.h, -.cxx • RodPrimList.h, -.cxx • RodOutList.h, -.cxx • RodRegisterBits.h • RodDspAddresses.h • RodVmeAddresses.h • Various RodModule test programs • /VmeInterface • RCCVmeInterface.h, -.cxx • VmeModule.h, -.cxx • VmePort.h • libRCCVmeInterface.a 25 September 2002

  5. Methods Inherited from VmeModule Key:  = well tested; ? = untested; ! = known problems •  initialize() • Reset the ROD (bit 7 of FPGA Control Register 2) • Read ROD serial number • Initialize Master HPIC register and read it back to verify • Wait for MasterDSP init • Read reply buffer addresses • Initialize state variables • ? reset() • Reset the ROD (bit 7 of FPGA Control Register 2) • Clear IDRAM • Reinitialize state variables • ? status() • Under development • Creates a RodStatus object • For now just print to standard output • What information do we want?, Levels of info? • How to display it? 25 September 2002

  6. VME Addresses • DSP Host Port Interface (HPI) • Command Register (HPIC): Sets half-word order. Set once at start of program and leave it alone. (0x00000000/VME) • Address Register (HPIA): Address in DSP space to be accessed. • Data Registers: Data port (0x02000000/VME) • HPID_AUTO: Auto increments HPIA after access (0x04000000/VME) • HPID_NOAUTO: Leaves HPIA unchanged (0x06000000/VME) • FPGA Status and Control Registers • They access the FPGAs directly for configuration, reset, status, halt, etc. • FPGA_CONTROL_REG_REL_ADDR[8] (0x00C00000/VME) • FPGA_STATUS_REG_REL_ADDR[8] (0x00C00024/VME) 25 September 2002

  7. DSP Addresses • Primitive buffers • PRIM_BUFF_BASE (0x02040000/MDSP) • PRIM_BUFF_SIZE (0x28000) • Reply buffers • REPLY_BUFF_BASE (0x02068000/MDSP) • REPLY_BUFF_SIZE (0x28000) • Text Buffers • TEXT_BUFF_SIZE (0x8000) • ERR_BUFF_BASE (0x02020000/MDSP) • INFO_BUFF_BASE (0x02028000/MDSP) • DIAG_BUFF_BASE (0x02030000/MDSP) • XFER_BUFF_BASE (0x02038000/MDSP) • ROD Status Registers • STATUS_REG[3] (0x80000000/MDSP) • VME Command Registers • COMMAND_REG[2] (0x8000000C/MDSP) 25 September 2002

  8. Constructor  RodModule( unsigned long baseAddr, unsigned long mapSize, VmeInterface & ourInterface, long slot, long numSlaves); • There are no copy or assignment operators. • The constructor creates a VmePort object and registers it with its VmeInterface object. 25 September 2002

  9. Shared Header Files • The C-code DSP programs and the TestStand program use shared header files to specify addresses and bit assignments. We would like to use these same headers for C++. • We want to specify these details in only one place and propagate the information. • In C, these are set with #define statements. • C++ can use C headers, but it is more in keeping with C++ principles to declare the constants as const unsigned long variables. This lets the compiler catch any attempts to change them, and it does not expose the code to global text substitutions from #define statements. • I have wrapped the C headers with C++ header files that expose only data of interest to RodModule and use const unsigned long values. This also isolates C++ code from changes in C headers, and hides C-only parts of the header. 25 September 2002

  10. RodModule: Data Members Board Params: long m_slot; //! Slot number in VME crate unsigned long m_serialNumber; //! Board serial number VmePort* m_myVmePort; //! VME Port handle long m_numSlaves; //! Number of slave DSPs on this ROD long m_finBufferSize; //! Size of file input buffer, in bytes. Default=4096 ?std::string m_masterImageName; //! string holding name of master image file ?std::string m_slaveImageName[4]; //! string array holding names of slave image files Register copies: unsigned long m_vmeCommandReg[2]; //! Cached copy of VME command registers unsigned long m_rodStatusReg[3]; //! Cached copy of ROD Status registers Primitive handling: RodOutList* m_myOutList; //! A pointer to the array holding a reply buffer PrimState m_myPrimState; //! State variable for sending primitive lists Text buffer handling: TextBuffState m_myTextState; //! State variable for reading text buffers TEXT_BUFFER_TYPE m_textType; //! Text buffer type struct TXTBUFFER m_txtBuffer; //! A struct holding text buffer info from txtbuffer.h char m_textData[TEXT_BUFF_SIZE]; //! A local buffer to hold the text data unsigned long* m_textBuff[N_TXT_BUFFS]; //! Array of pointers to the text buffers in MDSP space 25 September 2002

  11. RodModule: HPI Access Methods //! Load a 32-bit value into an HPI register.  voidhpiLoad(const unsigned long hpiReg, const unsigned long hpiValue); //! Fetch a 32-bit value from an HPI register.  unsigned long hpiFetch(const unsigned long hpiReg); 25 September 2002

  12. RodModule: DSP-space Access Methods //! Read to and write from Master DSP address space  unsigned long mdspSingleRead(unsigned long address);  void mdspSingleWrite(unsigned long address, unsigned long value); !void mdspBlockRead(unsigned long address, unsigned long buffer[], long count); !void mdspBlockWrite(unsigned long address, unsigned long buffer[], long count); Note: multi-block transfers are not yet tested. //! Read to and write from a slave DSP memory address ? Unsigned long slaveSingleRead(long slaveNum, unsigned long dspAddr); ? void slaveSingleWrite(long slaveNum, unsigned long address, unsigned long value); ? void slaveBlockRead(long slaveNum, unsigned long address, unsigned long buffer[], long count); ? void slaveBlockWrite(long slaveNum, unsigned long address, unsigned long buffer[], long count); 25 September 2002

  13. RodModule: DSP Reset Methods //! Reset the Master DSP via FPGA Control Reg 2  voidresetMasterDsp(); //! Reset a Slave DSP via FPGA Control Reg 2 ? void resetSlaveDsp(long slaveNumber); //! Reset all DSPs via FPGA Control Reg 2 ? void resetAllDsps(); 25 September 2002

  14. RodModule: Primitives //! Send a primitive list  void sendPrimList(RodPrimList *list); //! State machine to handle primlist dialog with ROD  PrimState& primHandler(); //! Delete reply list retrieved by primHandler  void deleteOutList(); 25 September 2002

  15. RodModule: Text Buffers //! Get a text buffer  void getTextBuffer(char * buffer, long length); //! State machine to handle text dialog with ROD  TextBuffState textHandler(); Note: reading a wrapped-around buffer not yet tested //! Clear the text buffer when done  void clearTextBuffer(); 25 September 2002

  16. RodModule: Utilities //! Calculate a checksum (bit-wise XOR)  long checkSum(const unsigned long *sourceArray, const long wordCount); //! Go to sleep for a specified number of milliseconds  void sleep(const double milliSecs); //! Reverse the endian-ness of a data word if a flag is set  unsigned long endianReverse32(const unsigned long inValue); These methods may be moved to a RodUtilities class in the future. 25 September 2002

  17. RodPrimitive Class • A simple class to hold Primitive objects • Data members: • long m_length • long m_index • long m_id • long m_version • long *m_body •  Methods: Only the usual data accessor methods (“get” and “put”). 25 September 2002

  18. RodPrimList Class • Derived from the C++ Standard Template Library (STL) list class. This gives us almost all the functionality we need for free. • Data members: • unsigned long m_index • Unsigned long m_version • unsigned long *m_buffer • unsigned long m_listLength • Methods (other than data accessors) •  unsigned long numWords() •  unsigned long checkSum() •  void bufferBuild() •  void clear() 25 September 2002

  19. RodOutList Class • Contains reply lists generated by the MDSP in response to an associated primitive list. • Structure is the same as a PrimList • Data members: • long m_length • unsigned long* m_body • Methods: •  unsigned long* getBody() •  long getLength() • RodModule makes no attempt to understand the reply list, it merely passes it to a user thread for further handling. 25 September 2002

  20. Main Programs for Testing •  EchoTest.cc The first program I wrote sends a simple “ECHO” primitive, retrieves the reply, and prints it on the console. It also detects and prints messages from text buffers (mainly error). • Useful for debugging RodModule code and as a model for later programs. • In real RODDAQ, this functionality will be spread between threads and processes on the host and RCC machines. • Other programs are (or will be) • MdspDump.cxx - Dumps values from a range of DSP addresses to stout. • Echo2Test.cxx – Test primlist with multiple echo primitives • ?LedTest.cxx – Flashes a front panel LED via slave DSP • ?TextTest.cxx – Fill a text buffer via a primitive • … 25 September 2002

  21. Sequence Diagram 25 September 2002

  22. Text Buffers • Text buffers are more useful for debugging than for data taking. • If a DSP CPU crashes, we cannot execute primitives. But the on-board extended memory interface (EMIF) circuitry still lets us read the SDRAM contents. • Text Buffers are blocks of SDRAM memory to which we can write ASCII records with traceback information, or simple diagnostic info for later analysis. (Recall debugging FORTRAN with print statements.) • Even if DSP is fine, it may be useful to pass ASCII data into a message stream (MRS) in ATLAS. • There are four text buffers defined for the Master DSP • Err: for reporting fatal software error tracebacks • Info: for non-priority information messages • Diag: for diagnostic messages, “print” to it like we used to print out FORTRAN debug messages. • Xfer: A temporary MDSP buffer to relay text buffers from the Slave DSPs 25 September 2002

  23. Text Buffer Handling 25 September 2002

  24. Short- and Medium-Term Future • Finish RodModule to first order (3 weeks) • Test slave routines (LED primitives, Memory read/write, DSP reset) • Test text-generator primitive, use to test wrap-around readout • Write prototype status() – in progress • Fix block transfer and HPID++ problems • Test multi-block transfers • Implement threaded version (3 weeks) • Command thread • Reply handling thread • Error handling thread • Background thread • Drive threads from DAQ-1(2 weeks) • Send results to analysis routine(s) (worked on in parallel to above – who?) • Define interface for data • Define transport method (IPC at first, CORBA later) • Write analysis program (root? PAW? Other?) • Pixel calibration program • Hard-wired commands and configuration • Need ROD+BOC+TIM+Module => do at LBNL • I propose a one or two week visit to LBNL of relevant parties in late November to mid January time frame. 25 September 2002

  25. Phase 1: Pixel Calibration Program • 1 ROD (=>1 crate) • Posix threads • DAQ-1 • Hard-wired, or very simple, configuration • No data base • Simple displays • Analysis on host computer (no CORBA) 25 September 2002

  26. A Possible Path to Phase 1 RodModule Debugged “reply” thread/ IPC pThreads Simple Config DAQ-1 Analysis/ archiving ROD+BOC+ TIM+Module Phase 1 “RODfest” @ LBNL 25 September 2002

  27. Longer-term Future • Multi-Rod and multi-crate support • Configure dynamically from data base • Dynamic control of operations • CORBA for command distribution and event publishing • Full implementation of plan from February workshop 25 September 2002

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