Difference between revisions of "Busy Box and related"

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[[Media:master_thesis_magne_munkejord.pdf|Master Thesis, Magne Munkejord]]
 
[[Media:master_thesis_magne_munkejord.pdf|Master Thesis, Magne Munkejord]]
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[[Media:jalme_phd-thesis.pdf|PhD Thesis, Johan Alme]]
  
 
[[Category:Trigger]]
 
[[Category:Trigger]]

Revision as of 21:24, 19 February 2009

Overview

Traditionally the Fee in ALICE sub-detectors indicates when its buffers are full and cannot handle further triggers from the CTP. This is either done directly or through the FANIN module to the LTU with a busy signal.

Due to dense cabling, four of ALICE sub-detectors (TPC, PHOS, FMD and EMCal), utilize a BusyBox to keep track of free buffers in their Fec. The BusyBox asserts the busy signal to the LTU when one of these conditions is true: Buffers in Fec are full, upon receiving a trigger sequence from TTC or when the TTC sends a global reset to the Fee. The BusyBox is located in the DAQ counting rom.

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RCU Trigger Receiver Module

Master Thesis, Magne Munkejord

PhD Thesis, Johan Alme