VME-CDM

VME-CDM - GRIFFIN Clock Distribution Module

References

• edev login: no public access, sorry!
• edev-pps login: no public access, sorry!
• ladd00 svn login: username: svn, password: svn

• [1] VME-CDM project page on edev.triumf.ca
• [2] Rev2 board schematics (link to edev)
• [3] VME-CDM project page on edev gitlab
• [4] Microsemi ARM processor linux software

General characteristics

Photos

Rev2 boards

Board schematics

Media:VME_-_Clock_Distribution_Module_Rev2.pdf

Available hardware

• LMK04821 PLL/clock cleaner. Manual: Media:Snas605ar-LMK04821.pdf
• Socket for Atomic clock CSAC Symmetricom CSAC-SA.45s
• Microsemi Smartfusion2 SoC M2S-FG484 (ARM CPU). Product page: https://www.emcraft.com/products/255
• 10/100 Mbit/s ethernet
• no VME interface
• dual mode eSATA connector:
  • eSATA clock+sync input or
  • USB-A access to ARM CPU serial console via FTDI USB-serial chip
• 24 clock+sync outputs (LVDS) via 6 mini-SAS connectors (SFF-8088)
• 3 dual LEMO connectors: (from top to bottom) ("A" is left, "B" ir right)
  • LEMO1A - EXT_SYNC_IN (NIM or TTL sync)
  • LEMO1B - EXT_RefClk_IN (NIM or TTL clock)
  • LEMO2A - CLOCK_OUT1_NIM (LVDS_CLK7)
  • LEMO2B - selected by jumper: CLOCK_OUT2_NIM (LVDS_CLK6) or GPS_1PPS_IN
  • LEMO3A - 1PPS_OUT_NIM
  • LEMO3B - 10MHz_OUT_NIM
• 4 red and 4 green LEDs

ARM processor

Console connection

• use a USB type-A to type-A cable to connect from CDM eSATA connector to computer USB connector.
• on linux, two /dev/ttyUSB ports will show up (FTDI USB-serial chip)
• use minicom (or other tool) to connect with these serial port settings:

Serial Device      : /dev/ttyUSB2
Bps/Par/Bits       : 115200 8N1
Hardware Flow Control : No
Software Flow Control : No

• type "enter" several times to get the "#" root shell prompt
• on power cycle, observe the output from u-boot and from the linux kernel https://daqshare.triumf.ca/~olchansk/VME-CDM/cdm-boot.txt
• press "enter" or "space" to break into the u-boot command line
• original u-boot settings from Bryerton are here https://daqshare.triumf.ca/~olchansk/VME-CDM/cdm-uboot-printenv.txt

Useful u-boot commands

• reset - reboot the CPU
• printenv - print environment
• saveenv - save environment
• run update - load new firmware image to write it to onboard flash. For it to work:
  • IP address settings have to be correct
  • tftpd should be configured on the boot server
  • developer.uImage should be placed in /var/lib/tftpboot on the boot server
  • if successful, the command will print hashes "#" as data is loaded via tftp and finally report successful write to SPI flash

# reboot
### press <enter> many times until you get into the u-boot prompt
run update
reset

• boot linux kernel with DHCP network configuration:

setenv addip setenv bootargs m2s_platform=m2s-fg484-som console=ttyS0,115200 panic=10 ip=dhcp
saveenv
reset

Building the linux kernel and userland

AAA