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VMEbus Controller with Gigabit Ethernet for Beam Test

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  1. New Crate Controller Development A VMEbus Controller with Gigabit Ethernet • A custom board designed and developed at OSU • Based on XILINX Virtex-II Pro • Custom firmware. • Optical transceiver (for Gbit Ethernet) • Communicates with stand-alone PC (in USC55) via Ethernet Status • Prototype board produced. • Gbit Ethenet and VME firmware being developed. • Firmware has modular design. Each module simulated as it is written. • Aiming to be ready for beam test in June.

  2. Firmware Components • Clock Manager • Master Control • Ethernet Interface • External FIFO Interface (for VME commands) • Configuration Memory Interface (Flash Memory) • VME Interface • Command and Control Registers • Error and Statistics Monitor • Reset Handling

  3. Ethernet Interface • Rocket IO – (16 bit interface) • Clock Recovery • SERDES • 8B10B Encoding • Generates and checks CRC • Receive Processing • Transmit Processing

  4. Receive Processing Components • MAC Frame Processor • Identifies SOP, Preamble, SOF • Matches MAC Address (Multicast, Broadcast) • Stores MAC Source Address • Checks Length • Frame FIFO • Stores Payload Data from Packet • Keeps good Frames, Drops bad Frames • Saves Lengths and MAC’s for each incoming Packet • Payload Decode • Readout FIFO • Interpret Protocol and Decode Commands • Generates “OPCODE” for Master Controller • Error Monitoring • Validates incoming Frames

  5. Transmit Processing Components • Packet Builder • FIFO for collecting Data before sending • Track Length and Type of Data • Tags “New” packets and packet “Fragments” • Separate Path for Priority Packets • Transmit MAC Frame • Maintains Idle State • Checks Data Type and Length from Packet Builder • Builds Protocol Header based on Type • Sequences Packet from various Sources: • (SOP, Preamble, SOF, MAC Destination, MAC Source, Length, Protocol, Data, Filler, CRC, EOP, Carrier Extend, Inter Packet Spacing) • Error Monitoring

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