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