1. Pi Logic Controller Teresa Núñez DESY Photon Science
Description/Features
Scheme
Software interface
Applications
Tango Meeting
ELI Beamlines,

2. Scope of applications only limited by the FPGA functionality
Pi Logic Controller
Multifunctional and customizable module for fast signal processing
Data processing power, speed, synchronicity -> FPGA
Configurable input/outputs -> NIM/TTL I/O, ADC, DAC
and temperature (PT sensor) cards
High-level user-friendly interface -> Raspberry Pi 2
Scope of applications only limited by the FPGA functionality
Developed at DESY (FS-EC group)

3. Easily exchanged if damaged
Description/Features
Six different PCB’s:
Mainboard
Raspberry Pi
DE0-Nano board
(FPGA Cyclone IV)
Display board
I/O board
I/O cards
Resistive touch-display 480x680 pixel
16 LEMO jacks
16 RGB LEDs
USB 2.0 ports (2 front-1 rear)
Ethernet link
Easily exchanged if damaged
Power Supply:
NIM
+6V mains adaptor
FPGA processing time down to 6 ns
Power consumption < 20 Watt
Signals galvanically isolated
Stereo sound

4. Scheme Raspberry Pi2 Touch display Ethernet NIM-Crate plug FPGA
(2x32bit regiters/IO)
LEDs display I/O status
16 slots for I/O cards:
- NIM-TTL I/O
- ADC/DACs (0-10V)
- PT sensors
USB 2.0 jacks
(2 front – 1 rear)
Isolated Lemo I/0 jacks

5. Configured and controlled via Tango Servers
Software Interface
Configured and controlled via Tango Servers
Raspberry Pi2 (Debian OS)
PiLCTriggerGenarator TS
BCM2835 lib
XMCD TS
HL lib …
BL Computer
PiLC TS
Download FPGA firmware
Read/write FPGA registers
Control FPGA operation
I/Os
i/o cards
PiLC
FPGA

6. Dedicated Tango Server for each application
Applications
Dedicated Tango Server for each application
Delay Generator for Pump-Probe experiments
Detector counts collection based on input signal depending on
magnet state for XMCD measurements
VFC: frequency generator linearly dependent on an analog input
XMCD -> X-Ray Magnetic Circular Dichroism

7. Continuous scans trigered by PiLC
Applications: Continuous Scans
Continuous scans trigered by PiLC
PiLCTriggerGenerator TS
PiLCArrayBasedTG TS
PiLC TG
Counts
Triggers
PiLCScanSlave TS
Encoder
PiLC Slave
Counts/ADC values

8. Generate triggers and store data
Applications: Continuous Scans
PiLCTriggerGenerator:
Generate triggers and store data
Seven trigger modes: based on time and/or position (start and frequency, ‘zig-zag’ in defined window) or external signal.
Up to five encoder and one counter values (extensible) stored in circular buffer (32 MB depth) during scans
Selectable encoder triggering
Data (encoders/counter readings) accessible during scan
Maximum trigger rate depends on stored data and requested number of triggers (limited by buffer full): up to 11.2 kHz in worst scenario
Output written in nexus files (pni-libraries)

9. Generate shifted triggers
Applications: Continuous Scans
PiLCArrayBasedTG:
Generate shifted triggers
Array-based defined pattern
Two modes: counter or encoder input signals
Up to four trigger channels
Trigger information loaded from input file: trigger-channel,
trigger-value, trigger-level
Take care of detector after-glow
Ex. Control Perkin Elmer and shutter

10. Listen triggers and store data
Applications: Continuous Scans
PiLCScanSlave:
Listen triggers and store data
Up to five values from counter or ADC card (TS dinamically configured)
Data accessible during scan
Working in manual or automatic mode (arm by itself or by TriggerGenerator TS)
Output written in NeXus files (pni-libraries)
Integrated in Sardana via Macros and TriggerGenerator controller (under test)

11. Continuous scans trigered by PiLC
Current applications at DESY
Continuous scans trigered by PiLC
20 new PiLC modules in preparation