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Software for development and communication with FPGA based hardware

Software for development and communication with FPGA based hardware. Jaroslaw Szewinski, Piotr Pucyk. Agenda. General idea System scheme Embedded systems Development tools Future plans. FPGA feature s. Functionality of the FPGA is flexible, and can be changed very often.

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Software for development and communication with FPGA based hardware

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  1. Software for development and communication with FPGA based hardware Jaroslaw Szewinski, Piotr Pucyk

  2. Agenda • General idea • System scheme • Embedded systems • Development tools • Future plans LLRF05 Workshop

  3. FPGA features • Functionality of the FPGA is flexible, and can be changed very often. • Hardware interface (protocols, buses’ widths, etc) may be changed. • Software must handle all this flexibility. LLRF05 Workshop

  4. Guidelines for software • Using configuration files when possible (recompilation only in the last resort) • Modularity: • Division into the layers • Interfaces defined between layers • Implementation as Dynamic Link Libraries (DLL) or Shared Objects (SO) LLRF05 Workshop

  5. TCP Server TCP/IP FPGA Internal Interface LPT VME IID Interpreter Eth ??? IID File Other Applications Hardware Channels Engine User Applications System Scheme LLRF05 Workshop

  6. TCP Server TCP/IP Channel Channel XIID Library XIID NET XIID Library TCP/IP Connection LLRF05 Workshop

  7. Control Systems Using these hardware access interfaces two control systems has been set up: • DOOCS – Distributed Object Oriented Control System developed at DESY • Our own Matlab based toolset (used mostly for laboratory development) LLRF05 Workshop

  8. Embedded Systems • External RISC CPU - Axis Etrax • FPGA chip with CPU - Xilinx Virtex II Pro • Soft processors (described in VHDL) implemented in programmable logic – NIOS, MicroBlaze and others • Dedicated Linux distributions are available for all examples listed above LLRF05 Workshop

  9. Client on remote machine TCP/IP Virtex II PRO Linux on PPC User mode TCP server Kernel mode driver Hardware FPGA II Core Internal Interface bus Linux on PowerPC • User applications access hardware through the driver • Kernel mode driver has access to the FPGA • FPGA has defined hardware interface LLRF05 Workshop

  10. Common usage • Calculations • non time critical algorithms • post processing • Communication • trough the VME bus • Standalone, using Ethernet and TCP/IP LLRF05 Workshop

  11. Currently available software • X11 window system • DOOCS server libraries • Scripting languages: perl, tcl • Secure shell (ssh) • Apache web server • Our custom tools (drivers, servers, etc) LLRF05 Workshop

  12. Development Tools LLRF05 Workshop

  13. Future Plans • Porting EPICS to our Linux distribution • Running VxWorks on PowerPC • Research on Altera’s NIOS processor • Completing full communication layer for the VUV-FEL experiment LLRF05 Workshop

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