1. RCU Status 1.RCU design 2.RCU prototypes 3.RCU-SIU-RORC integration 4.RCU system for TPC test 2002 HiB, UiB, UiO

2. 1. RCU design – system architecture

3. RCU design – control flow State machines RCU resource & priority manager TTCrx FEE bus controller SIU controller DDL command decoder FEE SC Slow control Watch dog: health agent Debugger PCI core Huffman encoder

4. RCU design - data flow TTCrx registers Event memory Event fragment pointer list TTC controller FEE bus controller Configuration memory FEE bus controller Slow control SIU controller fifo SIU Huffman encoder Shared memory modules

5. 2. RCU prototypes Prototype I –Commercial OEM-PCI board –FEE-board test (ALTRO + FEE bus) –SIU integration –Qtr 3, 2001 – Qtr 2, 2002 Prototype II –Custom design –All functional blocks –PCB: Qtr 2, 2002 –Implementation of basic functionality (FEE-board -> SIU): Qtr 2, 2002 –Implementation of essential functionalty: Qtr 4, 2002 Prototype III –SRAM FPGA -> masked version or Antifuse FPGA (if needed) RCU production –Qtr 2, 2003

6. RCU prototype I Commercial OEM-PCI board –ALTERA FPGA APEX EP20K400 –SRAM 4 x 32k x 16bits –PMC I/O connectors (178 pins) –Buffered I/O (72 pins)

7. RCU prototype I Implementation of basic test functionality –FEE-board test (ALTRO + FEE bus) –SIU integration PCI core SIU card PCI bus FPGA APEX20k400 internal SRAM I/O onboard SRAM 4 x 32k x 16 FLASH EEPROM FEE-bus daughter board PMC FEE boardstrigger

8. PCI core SIU-CMC interface SIU PCI bus FPGA internal SRAM Memory D32 > 2 MB FLASH EEPROM SCTTCFEE- bus RCU prototype II Implementation of essential functionality –Custom design –All functional blocks

9. RCU prototype II - schematics

10. Programming model Development version – status December 2001 PC LINUX RH7.1 (2.4.2) PCI core mailbox memory SIU controller FEE bus controller FEE bus ALTRO emulator PCI-tools RCU-API device driver ALTRO emulator PLDA board SIU DDL

11. 3. SIU-RORC integration SIU controller PCI core SIU interface PCI bus FPGA SRAM LINUX/NT PLDA/PCI- tools RCU-API devicer driver SIU PCI bridge Glue logic DIU interface PCI bus LINUX DDL/PCI- tools pRORC-API device driver DIU DDL RCU prototype I pRORC SIU-controller functions implemented: –Read RCU status word –Write register to RCU –Read events from RCU Not yet implemented: –Write block to RCU –Read block from RCU

12. SIU-RORC integration System setup, Bergen, Nov./Dec. 2001

13. SIU-RORC integration Result data control PC1: write memory block to FPGA internal SRAM DDL PC1 memory block RCU internal SRAM SIU DIU PC2 ”bigphys” memory area SIU controller: wait for READY-TO-RECEIVE PC2: allocate bigphys area, init link + pRORC PC2: send DDL-FEE command READY-TO-RECEIVE SIU controller: strobe data into SIU pRORC: copy data into bigphys area via DMA =

14. 4. RCU system for TPC test 2002 RCU requirements –Readout of 4 FEE-bus branches 2 RCU prototypes II Fallback solution: –4 RCU prototypes I (3 boards are available) –Basic RCU functionalty Develop logics for readout of all FEE cards on FEE-bus Include external SRAM Develop Manager SM for controlling data transfer from FEE-bus to SIU Include simple trigger and event-ID –Interface to DAQ DATE DAQ via DDL –2 pRORC (including SIU + DIU) –Integrate pRORC into DATE (DAQ-group) Fallback solution: –DAQ via RCU-PCI

15. RCU system for TPC test 2002 FEE-bus controller SIU controller PCI core SIU interface PCI bus FPGA SRAM LINUX RH7.x DATE PLDA/PCI-tools RCU-API devicer driver SIU PCI bridge Glue logic DIU interface PCI bus LINUX RH7.x DATE DDL/PCI-tools pRORC-API device driver DIU DDL RCU prototype II/I pRORC ext. SRAM FLASH Manager FEE- bus Trigger FEE-boards

16. Programming model TPC test version – summer 2002 PC LINUX RH7.1 (2.4.2) PCI core mailbox memory SIU controller FEE bus controller FEE bus FEE boards PCI-tools RCU-API device driver Prototype II (Prototype I) SIU DDL DATE FEE configurator RCU resource & priority manager

17. Open questions (1) Radiation induced corruption of SRAM –Configuration SRAM bit toggle rate > O(1/hour) Replace SRAM based FPGAs with –masked versions (expensive) –or Antifuse FPGAs (additional prototyping – 6 months?) –Configuration SRAM bit toggle rate < O(1/hour) External watch dog circuit –periodical check of configuration SRAM –reload FPGA configuration –STAR experience TPC and FTPC FEE: SRAM-based FPGAs Not a single incident observed in approx. 100 days of operation –Estimate for ALICE SRAM bit toggle rate < O(1/day)??? -> Quantitative study needed - wait for SIU results

18. Open questions (2) Firmware –Interface to many different subdetectors (SC, Trigger, DDL, DAQ, FEE-bus) –Fully debugged hardware/firmware/software not always available -> develop emulators - needs experts and time Software –High level test software –DATE applications –Online monitoring for TPC test -> who?