Busy Box and related: Difference between revisions
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<li>'''Version 1. | <li>'''Version 1.01: '''<br> | ||
[http:// | [http://svn.ift.uib.no/svn/busybox_firmware/trunk/busybox_files/busybox_fpga1.bit] | | ||
[http://svn.ift.uib.no/svn/busybox_firmware/trunk/busybox_files/busybox_fpga2.bit] | | |||
[http://svn.ift.uib.no/svn/busybox_firmware/trunk/busybox_files/busybox_fpga1_solo.bit] | | |||
[[Electronics_for_the_Time_Projection_Chamber_%28TPC%29#RCU_Trigger_Receiver_Module|RCU Trigger Receiver Module]] | [[Electronics_for_the_Time_Projection_Chamber_%28TPC%29#RCU_Trigger_Receiver_Module|RCU Trigger Receiver Module]] | ||
Revision as of 11:49, 20 May 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 the 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 or more of these conditions are true:
- Buffers in Fec are full
- Upon receiving a trigger sequence from TTC
- When the TTC sends a global reset to the Fee
The busy signal is de-asserted when one or more FEC buffers are freed
The BusyBoxes are located in the DAQ counting rom.
Version history
1.0
- Magne Munkejord
1.01 (~may 2009)
- Firmware version register added to 0x2015
- Busy Controller module updated to handle orphan messages
Download Section
Specification document:
Media:User_guide_busybox.pdf |
Source files:
SVN database