SLIDAS 3.0 modifications

DESCRIPTION

To make the SLIDAS usable to test the performance of ROMBs, in particular the ATLAS Read-out Buffer, some extra features are needed, which will be implemented in version 3.0 of the SLIDAS. Those modifications are described below.

Dataformat

Make the event header and trailer compatible with the latest format specification, example
In the ROD format settings, make the LVL1 ID counter start at 1 and increment by 1

Length settings

Change the current length options 0, 4, 16, 64, 256, 1024, 4096, 8192, 16384, 32768 Bytes of data plus 56-Byte header into 52 (header and trailer only), 64, 256, 512, 1024, 2048, 4096, 8192, 16384 and 32768 Bytes (always including the new 52-Byte header and trailer)
In SW1 setting ROB 4 lengths, make that the total length is varied with 0%, +25%, 0%, -25%.

Triggers

Use the LEMO connector to input external triggers (the Start/Stop button keeps its current functionality of outputting one word or one event at a time or start/stop in the continuous mode)
Make that the SLIDAS has an internal trigger running at the following frequencies: 50, 75, 90, 100, 110, 125 and 150 kHz. This internal trigger is used when SW2 is in positions 3 to 9. This internal trigger should have the same functionality as the external trigger.

Event trigger counter

Increment the external trigger counter on every trigger pulse (up to a maximum of 1023 events, ignore extra triggers)
Decrement the trigger counter on every event sent out
Send out an event when the trigger counter is not zero

Busy signal

When the external trigger counter is larger than 511, assert the active high Busy signal (signal patt_gen<1> on J5)
When the external trigger counter is at 1023, assert the active high Overflow signal (signal patt_gen<2> on J5)

Reset

Check that an S-LINK URESET# cycle resets all counters and data header settings

Various

Check careful possible synchronisation problems with length counter setting/resetting
Update users manual
Make stickers which reflect the changes of the switches
Make guide on how others can do simple changes of the code

STATUS

Hardware

28 June 1999	First version of version 3.0 requirements
29 June - 3 September 1999	Gillian Damerell at CERN to do modifications
3 September 1999	All work done! Also the LHC-b dataformat is implemented

DOCUMENTATION

CONTACTS

Designer: Gillian Damerell
S-LINK coordinator: Erik Van der Bij

CERN - High Speed Interconnect - S-LINK - SLIDAS
Erik Van der Bij - 3 September 1999 - Copyright