Compact Universal Timing Endpoint Based on White Rabbit with Dual Ports
Introduction
The Cute-WR-DP is the enhanced version of Cute-WR with dual WR ports.
The two ports can act in different modes:
Parallel mode (Cute-WR-DP-PM)*
In PM mode both port acts as down-link port connect to different WRS, provide redundancy to improve the relibility for safety related applications. Two WRPC work simultaneously on each port, the switch over efforts developed on WRS can be adapted.
Chain mode(Cute-WR-DP-CM)*
In CM mode, two ports act as one down-link and one up-link to support cascade topology.
The CUTEWR-DP board can also be used as normal WR node when only one port is used.
Hardware
https://www.ohwr.org/5592 | https://www.ohwr.org/5593 |
Isometric view of Cute-WR-DP | Top view of Cute-WR-DP |
Features:
- 3.3v power supply, 1.5A
- VITA57 FMC mezzanine
- Two WR compatible SFP sockets
- Spartan 6 (XC6SLX45T-4CSG324C)
- 32MBit SPI FLASH (M25P32-VMF6P)
- 64Kbit I2C EEPROM (24AA64T-I/MC)
- FMC LPC interface following the VITA standard
- JTAG connector
- USB-UART port
- External CLK reference (work in master mode)
- Adjustable CLK output (optional)
- 2 USER IO on front panel, LEMO interface
- 2 front panel LEDs
- the following features are not compatible with VITA standard, will be removed in next version
- 2 Pmod Interfaces for debug
- 3 LEMO Interfaces for debug
- Addition Low-cost connector on FMC Region3
Firmware
The firmware is based on WRPC with modified code in the LM32 softcore.
The additional resource cost to support Dual Port is not twice of the
single port.
Project information
Hardware design
files
Firmware demo
project
Follow the
instructions
to run the project.
Current status
Date | Event |
26-Mar-2014 | Start of project. Conceptual Idea. |
25-Jan-2017 | Hardware verified |
25-Jan-2017 | Publish the simple dual port demo |
04-Apr-2017 | Publish the CUTEWR-DPV2 |
10-Mar-2018 | 20 Cute-WR-DP produced |
Contacts
Commercial producers
SyncTech - a spinoff company from THU
General question about project
- Guanghua Gong - Tsinghua University, Beijing