VLD EPICS development¶

Run the IOC¶

• log into hccoda@nps-vme4 from a terminal
  

  ssh hccoda@nps-vme4
  

• execute startup script (located in $HOME/bin)
  

  startIOC
  

Calibration test script¶

Enable / disable the random pulser to the connector and channels defined in the script.

• log into hccoda@cdaql3 from a terminal
  

  ssh hccoda@cdaql3
  

• execute calibration test script
  

  cd $HOME/scripts/VLD
  ./vld_calibration_test [0,1]
  

• Usage

  vld_calibration_test.sh [0,1]
                     0: disable
                     1: enable

• Script variable description

• VLDSLOT

IOC Base name + VLD Slot number. This is defined by the IOC startup script. Currently vme4 for nps-vme4, and VLD17 for the VLD in that crate.

• PULSER_SETTING

Enum for random pulser setting

 0: 700kHz
 1: 350kHz
 2: 175kHz
 3: 87.5kHz
 ...
 7: 5.5kHz
 ...
15: 21 Hz

• TRIG_SOURCE

Source to trigger pulser

 0: always high (should be Periodic trigger),
 1: random trigger only
 2: FP_trigger

• C0_LOW_MASK, C0_HIGH_MASK, C1_LOW_MASK, C1_HIGH_MASK, etc..

Connector channel enable bitmasks. E.g. to enable connection 0's channel 0 and 1,

C0_LOW_MASK=0x3

Square wave pulse script¶

Set the pulse waveform to a square wave with specified width and amplitude

• log into hccoda@cdaql3 from a terminal
  

  ssh hccoda@cdaql3
  

• execute square wave pulse script
  

  cd $HOME/scripts/VLD
  ./vld_square_pulse.sh [width] [amplitude]
  

• Usage

  vld_square_pulse.sh [width] [amplitude]
                     width: steps of 2ns [0, 1000]
                     amplitude: DAC setpoint at each step [0, 63]

Periodic Pulser script¶

Set the parameters for the periodic pulser.

• log into hccoda@cdaql3 from a terminal
  

  ssh hccoda@cdaql3
  

• execute periodic pulser script
  

  cd $HOME/scripts/VLD
  ./vld_periodic_pulser.sh
  

• Usage

  vld_periodic_pulser.sh [period]  [period_range]  [number]
                     [period]       :  Pulser period in units of period_range
                     [period_range] : 0: 8 nanoseconds
                                    : 1: 8.2 microseconds
                     [number]       : Number of pulses.  65535 for unlimited

EPICS driver repo¶

• https://github.com/JeffersonLab/vld-epics
• PV Descriptions: https://github.com/JeffersonLab/vld-epics#pvs