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We need to start with a long serial timeout, in order to catch the reboot
messages for a firmware upload (this has to be done through the bootloader).
But once we start sending the file, cut the serial timeout to 1ms. (I've
tested it down to 1us, but that may not work for everyone, and it doesn't
improve performance in a statistically significant way.)
This brings the time to upload a 4.5MB bitstream from 38:23 to 1:25.
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The main loop in cryptech_upload:send_file() was much more complicated
than necessary, and also contained some hidden assumptions about
serial I/O timing which happened to fail on the first two machines I
tested. We already had a perfectly good buffered-input function, so
rewrote to use that, and simplified control structure in the process.
In theory, the new code should work in any environment where the old
one did, but this has not yet been confirmed.
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Bootloader DFU fixes.
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Command parser now enforces little things like mutually-exclusive
required options so we warn users who attempt something silly.
Preferred source for uploads is now the firmware tarball installed
along with the client software; we still support uploading from an
explictly-specified source file, but one must now say "-i file".
Updating the bootloader is dangerous, we now say so and also require
an additional option before we'll even attempt it. For the record,
while testing this I did manage to brick my Alpha and had to use an
ST-LINK to recover, exactly as predicted by the new dire warning.
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like ssh-agent.
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ones look like console and RPC ports for the HSM.
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Also add bootloader upload.
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