S800 Documentation

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event_filter [2017/10/17 17:27]
pereira [Ion-Chamber packet] 		event_filter [2018/05/11 14:19]
pereira [S800 OBJECT PIN packet]
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 ====== S800 data format from Event Filter (S800 Filter) ====== ====== S800 data format from Event Filter (S800 Filter) ======
-This page describes the data format assembled by the S800 filter. The data is written in a series of 16-bit unsigned integers, subsequently referred to as ''words''. This format is suitable for the output of most of the modules presently used in the S800, and in the case where 32 bit integers are needed, the proper unpacking procedures will be given.+The purpose of the S800 filter is to parse data from the S800 Event Builder, and reformat them in separated data packets, with an [[#General packet structure|specific structure]]. 
 + 
 + 
 +Data from the S800 filter are encapsulated as Ring Items (RI) and, as such, will include a [[http://docs.nscl.msu.edu/daq/newsite/nscldaq-11.2/c185.html|Ring-Item Header]], a [[http://docs.nscl.msu.edu/daq/newsite/nscldaq-11.2/x214.html|Body Header]], and a Body, where the real parsed data are included. Ring Items emitted from the S800 filter are pushed into a [[http://docs.nscl.msu.edu/daq/newsite/nscldaq-11.2/c43.html|Ring-Buffer]] called **s800filter**. 
 + 
 + 
 +This page describes the data format assembled in the __Body__ of the S800 Filter RI. The data is written in a series of 16-bit unsigned integers, subsequently referred to as ''words''. Regardless of what modules are being read, the Body of the S800 Filter RI will always include four 16-bit words, followed by a series of [[#General packet structure|data packets]]. The structure of the whole Body is described in the diagram below: 
 + 
 + 
 + 
 +^ Body Length 1 ^ Body Length 2 ^ S800 Data Tag ^ S800 Data Version ^ Data Packet 1 ^ Data Packet 2 ^ ... | 
 + 
 +  * **Body Length 1**: Number of words in body (self inclusive) 
 +  * **Body Length 2**: Number of words in body - 1 (self-inclusive) 
 +  * **S800 Data Tag**: 0x5800 
 +  * **S800 Data Version**: 0x0005 
 + 
  
 ===== General packet structure ===== ===== General packet structure =====
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   * **Packet Length** (self-inclusive)   * **Packet Length** (self-inclusive)
  
-^    5    ^^^^^^^^^^^^^^^| +^    6    ^^^^^^^^^^^^^^^| 
-| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |+| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
  
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 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
 +
 +
 +
 +  * **Hodoscope Sub-packet "Hit-pattern" Tag** 
 +
 +
 +^    0x0002   ^^^^^^^^^^^^^^^|
 +| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X |
 +| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
 +
  
  
Line 631: Line 657:
 |63|62|32| |63|62|32|
  
 +
 +
 +===== S800 OBJECT PIN packet =====
 +The S800 OBJECT PIN packet includes the energy (encoded in the [[S800 USB DAQ data format#Tag 0x7167: Phillips 7164 ADC module for CRDC anodes (energies and TAC)|S800 Phillips 7164H ADC]] measured in the S800 OBJ PIN detector. Note that for most of the experiments, this packet is empty because this detector is rarely used.
 + 
 +
 +
 +  * **Packet Length** (self-inclusive)
 +
 +^    A number from 4 to 8    ^^^^^^^^^^^^^^^|
 +| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X |
 +| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
 +
 +
 +  * **Packet Tag**
 +
 +^    0x58A0    ^^^^^^^^^^^^^^^|
 +| 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 +| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
 +
 +
 +  * **Energy**
 +The energy from the Phillips ADC is given by one word:  
 +
 +^  ^^^ Ch ^   energy   ^^^^^^^^^^^|
 +| 0 | 0 | 0 | X | X | X | X | X | X | X | X | X | X | X | X | X |
 +| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
 +
 +
 +where Ch is the Phillips ADC channel reserved for the PIN detector (0)
  
  
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   * **Packet Tag**   * **Packet Tag**
  
-^    0x58E0    ^^^^^^^^^^^^^^^|+^    0x58F0    ^^^^^^^^^^^^^^^|
 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
event_filter.txt · Last modified: 2019/05/24 13:58 by pereira

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