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A generic driver for Data Buffer of MRF Timing System

A generic driver for Data Buffer of MRF Timing System. Babak Kalantari Paul Scherrer Institute Switzerland. MRF Event System Data Buffer. Real-time data transfer parallel to event distribution 2048 Bytes of raw data Transfer rate half of the event clock Applications include:

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A generic driver for Data Buffer of MRF Timing System

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  1. A generic driver for Data Buffer of MRF Timing System Babak Kalantari Paul Scherrer Institute Switzerland Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  2. MRF Event System Data Buffer • Real-time data transfer parallel to event distribution • 2048 Bytes of raw data • Transfer rate half of the event clock • Applications include: • Beam parameter distribution • Beam-synchronous DAQ • Bunch marking • Global command/status distribution Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  3. 1 2 3 start start start Pulser Diag. Pulser Diag. Pulser Diag. RF RF RF … … … Exp. 3 Exp. 2 dev. 1 dev. 3 Beam source Exp. 1 dev. 2 dev. 4 Exp. 4 Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  4. Problem / Similarities? • Need an EPICS driver that: • can send/receive data by standard record types • is application- and site- independent • easy to understand / use • Dev. Sup. layer similar to S7 PLC • A data buffer of PVs (each in certain offset) sent over network • Uses a generic device support layer (regDev by Dirk Zimoch) • Need a driver layer for • interaction with hardware • low level communication handling Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  5. One-to-one data mapping 2)Flush 1)Write 3)receive (I/O Intr) EVR DBuff EVG DBuff Protocol_data Protocol_data Offs=x Offs=x ao ai Offs=y Offs=y aao waveform Offs=z Offs=z bo bi Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  6. Support for protocols EVG (H/W) EVR (H/W) Data Buffer Tx Data Buffer Rx Deliver Flush Local Buffer (protocol_1) Local Buffer (protocol_1) Local Buffer (protocol_2) Read Write Local Buffer (protocol_2) Input records (set_1) Output records (set_1) Local Buffer (protocol_x) Local Buffer (protocol_3) Output records (set_x) Input records (set_x) Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  7. Driver Software • Configuration mrfDBuffConfigure ("device", cardNum, Tx, protocolID) • DB: • Output records (ao, bo, mbbo, aao, stringout, longout, etc. ) • OUT, “#C S @<device>/<offset> T=<datatype>" • SCAN, “Passive” • Input records (ai, bi, mbbi, waveform, stringin, longin, etc. ) • OUT, “#C S @<device>/<offset> T=<datatype>" • SCAN, “I/O Intr” • Special “bo” record: (data Flush) • SCAN, “Passive” • OUT, "#C<EvgCardNum> S<protocolID> @" device name data type offset in bytes Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  8. Example: • Startup: mrfDBuffConfigure (“myEvg_A", 2, 1, 10) mrfDBuffConfigure (“myEvr_A", 3, 0, 10) mrfDBuffConfigure (“myEvg_B", 2, 1, 15) mrfDBuffConfigure (“myEvr_B", 3, 0, 15) • DB:record (ai, "($NAME)") { field (DTYP, "regDev") field (INP, "@myEvr_A/4 T=FLOAT") field (SCAN, "I/O Intr")} record (stringin, "($NAME)") { field (DTYP, "regDev") field (INP, "@myEvr_B/4 T=STRING L=10") field (SCAN, "I/O Intr")} Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  9. Status • In production use at swissFEL test-facilities • Bunch marker • Beam synchronous DAQ (single-shot) • How to get it: • sourceForge EPICS Applications • “mrfDataBufferApp” included in MRF Event System driver package http://epics.svn.sourceforge.net/viewvc/epics/applications/trunk/mrfEventSystem/ Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

  10. Thanks! Babak Kalantari, EPICS Collaboration Meeting, Kobe 2009

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