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Kasli EEM controller

Design files (schematics, PCB layouts, BOMs) can be found at Kasli/releases.

Overview

Kasli is low-cost FPGA carrier, capable of controlling at 12 Eurocard extension modules. It can act as either an ARTIQ master, or as a slave connected to the master via DRTIO.

Kasli offers:

• XC7A100T-2FGG484I FPGA, DDR3 RAM, SPI flash
• a clock recovery and distribution network
• USB connectivity with four virtual ports
• four high speed 6 GB/s transcievers for Ethernet and DRTIO, and
• up to 12 EEM ports for Eurocard Extension modules

Kasli v1.0 was designed and tested by Paweł Kulik as a Masters project at the Warsaw University of Technology under the supervision of Dr. Grzegorz Kasprowicz.

• Master thesis proposal talk (2017)
• Thesis (2019)

Specification/initial design

Kasli is compatible with the Sinara EEM standard. Its design is based on the discussion in issue #129.

Front panel:

• 3 SFP connectors for Ethernet (if Kasli is the master) and DRTIO (one upstream, two downstream). Each with a LED.
  • SFP1: Ethernet in stand-alone (if Kasli is master), DRTIO upstream otherwise
  • SFP2: DRTIO downstream
  • SFP3: DRTIO downstream or special purpose.
• 1 micro USB for JTAG, serial console and I2C (FTDI Quad RS232 HS)
  • hardware distributors take note of how to configure the FTDI chip
• 1 SMA to the clock recovery and clock distribution chip used as RTIO reference clock input in master/stand-alone mode (recommended input level: -5 dBm, absolute max input level 9 dBm sine/square)
• FBarrel connector for +12V power, used for Kasli and passed through to the EEM IDCs. Compatible with locking barrel connectors for increased ruggedness.
• Three LEDs: L1, L2 and L3.
  • The gateware for the standalone variant supports user leds: L1 is led0 and L2 is led1.
  • The gateware for the master and satellite variants use L1, L2 and L3 as status indicators for DRTIO over the SFP.

EEM connectivity

• Eight EEM (0-7) available as 30 pin IDC connectors on Kasli
• Four EEM (8-11) available on the 96 pin DIN 41612 connector (see Kasli backplane adapter)

WARNING: Power down Kasli before plugging/unplugging EEMs.

Rear connections

• DIN 41612 96 position connector to backplane.

Rack-internal connections

• Hosts 8 EEMs using standard EEM headers
• Up to 4 EEMs via backplane
• 1 SATA (wired as master/host) connected to a transciever
  • SATA1 ("host" pinout, not "disk"/"reversed"): DRTIO downstream or special purpose
• 4 MMCX outputs with the RTIO reference frequency
• Port 4 of the FT4232H available on an optional pin header
• FPGA JTAG
• 3 USER_LEDs

Kasli v2 differences

• Three new dedicated User LEDs (not yet fully supported by ARTIQ). ** led0 is on the PCB behind the front panel ** led1 and led2 are on the front panel
• New Err LED on the front panel that is set when the runtime panics.

Accessories

Standalone

• 1000BASE SFP module for Ethernet connection. One of the following:
  • 1000BASE-BX-U and 1000BASE-BX-D and LC-LC fiber and SFP slot in upstream switch port
  • 1000BASE-T GBIC, RJ45 and RJ45 connection (or another GBIC plus SFP slot) in upstream switch
  • Direct attach cable (twinax), and SFP slot in upstream switch
  • Pair of 1000BASE-LX modules plus LC-LC duplex fiber and SFP slot in switch
• Ethernet switch if not already present
• 12V Power supply, >=5A, with barrel connector, 5.5 mm OD, 2.5 mm ID, can be locking
• Several 30 pin IDC cables to connect EEM modules
• 3U Subrack/crate
• Computer and ARTIQ

Eratta

v1.1

• Schematic indicates flash is Cypress S25FL128S but some boards were stuffed with s25fl256s.