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Overview
Overview
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--------
 
 
SpaceWire Light is a SpaceWire encoder-decoder with FIFO interface.
SpaceWire Light is a SpaceWire encoder-decoder.
It is synthesizable for FPGA targets (up to 200 Mbit on Spartan-3).
It is synthesizable for FPGA targets (up to 200 Mbit on Spartan-3).
 
Application interfaces include a simple FIFO interface, as well as
 
an AMBA bus interface for LEON3 system-on-chip designs.
 
 
The goal is to provide a complete, reliable, fast implementation
The goal is to provide a complete, reliable, fast implementation
of a SpaceWire encoder-decoder according to ECSS-E-50-12C.
of a SpaceWire encoder-decoder according to ECSS-E-ST-50-12C.
The core is "light" in the sense that it does not provide additional
The core is "light" in the sense that it does not provide additional
features such as RMAP, routing etc.
features such as RMAP, routing etc.
 
 
See doc/Manual.pdf for more information.
See doc/Manual.pdf for more information.
 
 
Future plans:
Future plans:
 * testing and documentation of AMBA bus interface
 
 * redesign fast receiver to improve performance
 * redesign fast receiver to improve performance
 * add support for Xilinx Virtex platform
 * add support for Xilinx Virtex platform
 
 
 
 
Version history
Version history
---------------
---------------
 
 
2010-19-21
2010-12-03
 
 * Add RTEMS driver and test program for SPWAMBA.
 
 * Add documentation for SPWAMBA.
 
 * spwamba: Change TX FIFO management; start new transfer when there is room
 
   for a maximum burst instead of aiming for 3/4 fill rate.
 
 * spwamba: Do not reset spwxmit in response to software reset.
 
 * spwamba: Fix bug in maximum burst size calculation.
 
 * spwamba: Optimize address generation in burst state machine.
 
 * spwamba: More careful calculation of RX credit.
 
 
 
2010-09-21
 * Add AMBA interface (preliminary version, untested, undocumented).
 * Add AMBA interface (preliminary version, untested, undocumented).
 * License changed from LGPL to GPL.
 * License changed from LGPL to GPL.
 * Again fix an issue with EEP injection on link loss.
 * Again fix an issue with EEP injection on link loss.
 * Add DATAPATHONLY keyword to timing constraints.
 * Add DATAPATHONLY keyword to timing constraints.
 
 

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