3.8-ms latency correlation tracker for active mirror control based on a reconfigurable interface to a standard workstation

Mark Shand; Wang Wei; Goran B. Scharmer

doi:10.1117/12.221333

19 September 1995 3.8-ms latency correlation tracker for active mirror control based on a reconfigurable interface to a standard workstation

Mark Shand, Wang Wei, Goran B. Scharmer

Author Affiliations +

Proceedings Volume 2607, Field Programmable Gate Arrays (FPGAs) for Fast Board Development and Reconfigurable Computing; (1995) https://doi.org/10.1117/12.221333
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

We describe the use of a reconfigurable interface board based on FPGAs and a UNIX workstation to implement a correlation tracker with 3.8ms latency. The correlation tracker is part of an active mirror system in use at the Swedish Vacuum Solar Telescope, La Palma, Canary Islands. The reconfigurable interface is used to leverage the workstation CPU, relieving it of tasks that it performs poorly such as rapid context switching and low-level bit manipulation. The reconfigurable interface handles control of external devices, high- performance input (16 MB/s) and data preformatting. The workstation CPU, a 64-bit microprocessor, performs the bulk of the computation. For the key computations of the correlation tracker we are able to treat 8 pixels in parallel in the CPU's 64-bit integer datapath. We present the structure of the CCD interface configuration and the implementations of the key algorithms on the workstation CPU. We describe the design trade-offs that arose during the development of the system, and demonstrate the symbiosis between components implemented in software and configurable hardware.

Citation Download Citation

Mark Shand, Wang Wei, and Goran B. Scharmer "3.8-ms latency correlation tracker for active mirror control based on a reconfigurable interface to a standard workstation", Proc. SPIE 2607, Field Programmable Gate Arrays (FPGAs) for Fast Board Development and Reconfigurable Computing, (19 September 1995); https://doi.org/10.1117/12.221333

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available