Improved version: http://svn.clifford.at/handicraft/2016/ice40compr … worst case is now -15%.pic.twitter.com/p9SN6ny1Hi
Neurodiverse trans geek girl. Yosys, RISC-V, SAT/SMT.
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Improved version: http://svn.clifford.at/handicraft/2016/ice40compr … worst case is now -15%.pic.twitter.com/p9SN6ny1Hi
Great! Can you compile it for bare-metal ARM? What is the code size?
I now wrote a pure C version of the uncompressor. Less than 200 bytes code size on ARM thumb. http://svn.clifford.at/handicraft/2016/ice40compr/ice40uncompr.c …
Would you add this as commandline option to icepack (-p) or some such?
Wouldn't it be more natural to have this functionality in the upload tool for the device with embedded decompressor?
current myStorm upload is 'cat chip.bin >/dev/ttyUSB0'
How would you reset the decompressor to make sure its in its init state? E.g. after interrupting an upload.
I'd suggest a small tool that sends: serial break (for reset), a magic value, compressed bit-stream.
No decompression without the magic value right after reset. So you can still cat uncompressed bins to /dev/ttyUSB0.
do you have the compression source and tweaks?
http://svn.clifford.at/handicraft/2016/ice40compr/ … should have everything you'd need. (see extended comment in ice40compr.cc for format doc)
does it make sense if compressor can pipe through? Something like this? `ice40compr < chip.bin >/dev/ttyUSB0`
Ack. The new version of the code on github can be called like this.
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