Difference between revisions of "FA125 Data Format Aug 11, 2015"

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= Agenda (to be updated, this is copied from the last meeting)=
+
= Agenda =
 
* [[FA125_Data_Format_July_7,_2015|Previous meeting (July 7, 2015)]]
 
* [[FA125_Data_Format_July_7,_2015|Previous meeting (July 7, 2015)]]
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* Status of FADC125 Firmware  
+
* FADC125 Firmware status
−
* Proposed field range for configuration parameters - from email and [[FA125_Data_Format_June_23,_2015#Proposed_field_range_for_configuration_parameters|last week's minutes]]
+
* Driver library status
−
* Data type list
+
* Mode names: CDC long/FDC short with amplitude, etc [[:File:FADC125_ADCmodes_v5_08.pdf|(See list)]]
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::0: block header
+
* Catch up on format spec since last meeting
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::1: block trailer
+
** Field range for configuration parameters unchanged [[FA125_Data_Format_June_23,_2015#Proposed_field_range_for_configuration_parameters|(See table in June minutes)]]
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::2: event header
+
** Latest version of format spec includes diagrams 
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::3: trigger time
+
** Added NE
−
::4: pulse data, CDC format
+
** Question on NPK>1 output in combo mode
−
::5: pulse data, FDC format (integral and time)
+
* Format spec still-to-do
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::6: pulse data, FDC format (peak amplitude and time)
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** Add table of time error codes
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::7: pulse data and raw samples, CDC format
+
* Testing plans
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::8: pulse data and raw samples, FDC format
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* Next meeting
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::9 to 12: – unused –
+
−
::13: event trailer (debug only)
+
−
::14: data not valid (empty module)
+
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::15: filler (non-data) word
+
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* [[:File:FADC125_ADCmodes_v5_08.pdf|ADC modes (pdf)]]
+
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* Integration starts with sample containing leading edge time
+
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::IE = end of integration, number of samples included, starting with pulse leading edge. The integral ends at the earlier of WE or leading edge + IE.
+
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::Leading edge sample is int(t/10.0) where t=time returned in units of sample/10.
+
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::If int(t/10.0) <= WE-IE, then the number of samples in the integral is IE.
+
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::If int(t/10.0) > WE-IE, then the number of samples in the integral is WE-int(t/10.0)+1.
+
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::<br/>
+
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::Examples
+
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:::IE=14 WE=44 t=425, integral runs from samples 42 to 44 inclusive, 3 samples.
+
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:::IE=14 WE=44 t=225, integral runs from samples 22 to 22+14=36 inclusive, 15 samples.
+
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:::IE=14 WE=44 t=210, integral runs from samples 21 to 21+14=35 inclusive, 15 samples.
+
−
::<br/>
+
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:::IE=200 WE=100 t=425, integral runs from samples 42 to 100 inclusive, 59 samples.
+
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:::IE=200 WE=100 t=990, integral runs from samples 99 to 100 inclusive, 2 samples.
+
−
::
+
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* Time algorithm error conditions (overflow samples are now set to 4095 and then treated normally)
+
−
*#ADC value of 0 anywhere in NSAMPLES buffer: q=1, t=10*TC-RT
+
−
*#ADC value > LIMIT_PED_MAX (511) in 0 to PED_SAMPLE: q=1, t=10*TC-RT
+
−
*#All ADC values in buffer < high timing threshold: q=1, t=10*TC-RT
+
−
*#Low timing threshold found between samples TCL and TCL+1 but too late in buffer to upsample: q=1, t=10*TCL+5
+
−
*#Low timing threshold found between samples TCL and TCL+1 but any upsampled value < 0: q=1, t=10*TCL+5
+
−
*#Low timing threshold found between samples TCL and TCL+1 but not found in upsampled data: q=1, t=10*TCL+9
+
−
{| border="0" cellpadding="2"
+
−
|+ Choice of constant RT for hit threshold=125
+
−
|[[Image:cdc_tdiff_thres125.png|thumb|x80px|time diff between hit threshold xing and leading edge (units sample/10)]]
+
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|[[Image:cdc_tdiff_amp_thres125.png|thumb|x80px|time diff vs max amplitude]]
+
−
|}
+
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::Suggestion: instead of returning 10*TC-RT for error conditions 1-3 above, how about 10*TC-29 for #1, 10*TC-28 for #2, 10*TC-27 for #3?
+
−
* Diagrams
+
  
−
== Useful Links ==
+
== Useful Info ==
−
* [[:File:FADC125_DataFormat_v5_06.pdf|Format doc version 5.06, 23 June 2015]]
+
* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2274 fADC125 Data Format Specification Document in DocDB - version 6]  
−
* [[CDC_algo|Timing algorithm wiki page - updated to include latest revisions]]
+
* [[CDC_algo|Timing algorithm wiki page]]
−
* [http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2274 fADC125 Data Format Specification Document in svn (old)]  
+
* Older documents:
−
* [[:File:FADC125_dataformat_250_modes.docx|Data format for 250 modes on fADC125 from Cody, Aug 15 2014]]
+
** [[:File:FADC125_DataFormat_v5_06.pdf|Earlier version of format doc version 5.06, 23 June 2015]]
−
* [[:File:FADC250_modes_2.docx|FA250 modes 2 from Ed and Hai, Feb 18 2014]]
+
** [[:File:FADC125_dataformat_250_modes.docx|Data format for 250 modes on fADC125 from Cody, Aug 15 2014]]
−
* [[:File:FADC250_V2_ADC_FPGA_V90D.docx|FIRMWARE for FADC250 Ver2 ADC FPGA, Sept 2014?]]
+
** [[:File:FADC250_modes_2.docx|FA250 modes 2 from Ed and Hai, Feb 18 2014]]
−
* [http://www.jlab.org/Hall-D/detector/fdc/FDC_pulse_data_format.pptx FDC_pulse_data_format]
+
** [[:File:FADC250_V2_ADC_FPGA_V90D.docx|FIRMWARE for FADC250 Ver2 ADC FPGA, Sept 2014?]]
−
* [[CDC_readout_requirements|CDC readout needs]] [[CDC_garfield_calcs|Garfield calcs]]
+
* For integral examples see [[FA125_Data_Format_July_7,_2015#Agenda]]
−
* [[CDC_run_985]] [[CDC_run_970]]
+
* For time error codes see [[FA125_Data_Format_July_7,_2015#Minutes]]
−
* [[:File:FA125_format_v5_03.pdf|Version 5.03, 11 March 2015]]  
+
* For list of data types, see [[FA125_Data_Format_July_7,_2015#Agenda]]
−
* [[:File:FA125_format_v5_01.pdf|Ver 5.01 in svn, 17 Feb 2015]]
+
* [[:File:FADC125_ADCmodes_v5_08.pdf|List of ADC modes (pdf)]]
  
 
=Minutes=
 
=Minutes=
−
Present: Naomi (CMU), Cody, Beni (JLab)
+
Present: Naomi, Mike (CMU), David, Bryan, Cody, Lubomir, Beni (JLab)
−
#FA125 status: Cody received the new module from Naomi yesterday and is working to fit it into with the rest of the firmware, at present in simulation.  The integration now takes place outside the timing module. The timing module was modified to output the number of the sample containing the leading edge as soon as this is found, so that the integration can start while the timing module is working on upsampling to find the pulse time more accurately.  Naomi will send Cody the new results for some test signals.
+
* FADC125 Firmware status - Cody has the short and long CDC modes working; with Beni he ran some tests to make sure that the output was as expected. The short mode ran at 120 kHZ with a random trigger.  Next they will try the long mode, and different configuration parameters.  
−
#Configuration parameter range: We are asking for any modifications to the proposed range to be provided by the end of this week. After then, Cody will start working them into the firmware and send them to Bryan for the driver.
+
* Driver library status - Bryan reported that the driver is ready, and available on his git repository as branch release-2.0.1.  This includes redefined arguments for fa125procmode and incorporates the new parameter names and functions for setting and retrieving timing thresholds and scaling factors, etc.  
−
#Data types: The list has been consolidated with the unused types moved to the end (see the meeting agenda).
+
* Mode names: We decided to stick with the names CDC long/FDC short with amplitude, etc [[:File:FADC125_ADCmodes_v5_08.pdf|(See list)]] but will have to renumber some of the data types to maintain consistency between the new and old data. David emailed that data type numbers 5,6,9,11 and 12 are available as these have not been used for the FA125 (some were defined but not used).
−
#ADC modes: We had a brief discussion about the proposed mode names in [[:File:FADC125_ADCmodes_v5_08.pdf|ADC modes (pdf)]]. Cody will talk to Bryan to find out if this is workable and if he has any other suggestions. The main aim is to avoid confusion between ourselves and between the FA125 and FA250 modes.
+
* Catch up on format spec since last meeting
−
#Integration: the new meaning of parameter IE is the count of samples in the integration, starting with the pulse leading edge, and not the original hit threshold crossing.  Integration stops when either IE samples have been summed, or sample WE is reached. Some examples are given in the meeting agenda.
+
** The field range for configuration parameters was unchanged.[[FA125_Data_Format_June_23,_2015#Proposed_field_range_for_configuration_parameters|(See table in June minutes)]]
−
#Error codes: We are not sure how useful it would be to be able to identify the different error cases offline, but giving them a unique error code is harmless and might be useful later. We changed the proposed amendment to the following
+
** The latest version of format spec includes diagrams 
−
##ADC value of 0 anywhere in NSAMPLES buffer: q=1, t=10*TC-29 (time ends in 1)
+
** The configurable parameter NE is required in place of the hard-coded 6 to prevent the subset of samples required by the timing algorithm from extending past the end of the data window.  6 was sufficient for the number of samples NU=15 and threshold crossing sample X=9, but making NU configurable requires a configurable parameter (NE) in place of '6'.
−
##ADC value > LIMIT_PED_MAX (511) in 0 to PED_SAMPLE: q=1, t=10*TC-28 (time ends in 2)
+
** NPK>1 output should be removed from the CDC combo mode as we will not use it
−
##All ADC values in buffer < high timing threshold: q=1, t=10*TC-27 (time ends in 3)
+
** An extra word containing NW and number of peaks found is needed for the long (combo) modes. It was suggested either to add that word as the second word in the data format (before the peak data and before the raw samples), or to use the 250 data format for raw samples.  
−
##Low timing threshold found between samples TCL and TCL+1 but too late in buffer to upsample: q=1, t=10*TCL+4 (time ends in 4)
+
* Next meeting - to be decided, either Aug 25 at 2.30 or the following week at 1.30.
−
##Low timing threshold found between samples TCL and TCL+1 but any upsampled value < 0: q=1, t=10*TCL+5 (time ends in 5)
+
Postscript: Next meeting will be Tuesday Aug 25 at 2pm
−
##Low timing threshold found between samples TCL and TCL+1 but not found in upsampled data: q=1, t=10*TCL+9  (time ends in 9)
+
−
#Diagrams: Naomi will update the 2nd and 3rd figs in the following plot to include in the file spec.
+
−
{| border="0" cellpadding="2"
+
−
|[[Image:cdc_old_time_diagram.png|thumb|x80px|from May meeting]]
+
−
|}
+

Latest revision as of 17:04, 24 February 2017

Location and Time

Room: CC F326

Time: 3pm.

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Agenda

  • Previous meeting (July 7, 2015)
  • FADC125 Firmware status
  • Driver library status
  • Mode names: CDC long/FDC short with amplitude, etc (See list)
  • Catch up on format spec since last meeting
    • Field range for configuration parameters unchanged (See table in June minutes)
    • Latest version of format spec includes diagrams
    • Added NE
    • Question on NPK>1 output in combo mode
  • Format spec still-to-do
    • Add table of time error codes
  • Testing plans
  • Next meeting

Useful Info

Minutes

Present: Naomi, Mike (CMU), David, Bryan, Cody, Lubomir, Beni (JLab)

  • FADC125 Firmware status - Cody has the short and long CDC modes working; with Beni he ran some tests to make sure that the output was as expected. The short mode ran at 120 kHZ with a random trigger. Next they will try the long mode, and different configuration parameters.
  • Driver library status - Bryan reported that the driver is ready, and available on his git repository as branch release-2.0.1. This includes redefined arguments for fa125procmode and incorporates the new parameter names and functions for setting and retrieving timing thresholds and scaling factors, etc.
  • Mode names: We decided to stick with the names CDC long/FDC short with amplitude, etc (See list) but will have to renumber some of the data types to maintain consistency between the new and old data. David emailed that data type numbers 5,6,9,11 and 12 are available as these have not been used for the FA125 (some were defined but not used).
  • Catch up on format spec since last meeting
    • The field range for configuration parameters was unchanged.(See table in June minutes)
    • The latest version of format spec includes diagrams
    • The configurable parameter NE is required in place of the hard-coded 6 to prevent the subset of samples required by the timing algorithm from extending past the end of the data window. 6 was sufficient for the number of samples NU=15 and threshold crossing sample X=9, but making NU configurable requires a configurable parameter (NE) in place of '6'.
    • NPK>1 output should be removed from the CDC combo mode as we will not use it
    • An extra word containing NW and number of peaks found is needed for the long (combo) modes. It was suggested either to add that word as the second word in the data format (before the peak data and before the raw samples), or to use the 250 data format for raw samples.
  • Next meeting - to be decided, either Aug 25 at 2.30 or the following week at 1.30.

Postscript: Next meeting will be Tuesday Aug 25 at 2pm

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