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SpaceWire Light
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SpaceWire Light
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===============
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===============
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Copyright 2009-2010 Joris van Rantwijk
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Copyright 2009-2011 Joris van Rantwijk
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SpaceWire Light is free software; you can redistribute it and/or modify
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SpaceWire Light is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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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-ST-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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SpaceWire Light supports two application interfaces. One interface
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provides FIFO-style access to RX/TX buffers in the core (spwstream).
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This interface can be easily integrated into most digital designs.
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Alternatively, an AMBA bus interface (spwamba) may be used to integrate
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SpaceWire Light into a LEON3 embedded system. This interface supports
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DMA-based data transfers. The code for the AMBA interface deponds on GRLIB,
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a VHDL library from Aeroflex Gaisler. The source of GRLIB must be downloaded
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separately from http://www.gaisler.com/.
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Future plans:
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See doc/Manual.pdf for more information.
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* redesign fast receiver to improve performance
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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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2011-02-11
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* spwamba: Add tick_out signal.
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* swprecvfront_fast: Simplified data transfer between clock domains.
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* Clean up synchronization of data paths between clock domains.
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2010-12-03
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2010-12-03
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* Add RTEMS driver and test program for SPWAMBA.
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* Add RTEMS driver and test program for SPWAMBA.
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* Add documentation 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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* 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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for a maximum burst instead of aiming for 3/4 fill rate.
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