Glasgow Embedded / Glasgow - History

applet.memory.onfi: implement up to 4 CE#, and add some docs.

applet.memory.onfi: allow reading data and spare into one file.

This could be used e.g. with Flash Extractor.

applet.memory.onfi: print ID signature.

This could be used e.g. with Flash Extractor.

applet.memory.onfi: parse and use ONFI parameter page.

applet.memory.onfi: increase wait states to 3.

This is a band-aid at most; we really need to rewrite this part of
the applet properly. However, without this band-aid, currently
not even the ONFI parameter page can be read reliably.

applet.memory.onfi: mark as preview-quality again.

The applet works decently enough, but the parallel bus should really
use IOB registers. It is not completely clear but this might be
the cause of read errors that manifest as single bit flips.

The reason I suspect these errors aren't inherent to the memory
itself is because they seem to correlate with the wire length in
my wiring harness. See #116 for details.

In principle, these single bit flips aren't too bad as the flash is
supposed to be read with ECC anyway, but we don't implement any ECC,
and moreover I don't feel comfortable signing off on an applet with
known data corruption issues. (It'd be much worse if the bit flip
happened in the command or address phase, too.)

Also, this applet misses ONFI signature readout (since I can't find
any ONFI-compliant flash) and/or some other way to detect page size
(yet to be discovered), which is a serious usability impediment.
Though it's less bad than the bit flips.

applet.memory.onfi: elide hex dumps from logs.

Improves throughput by avoiding converting to hex the data that will
never get actually shown, and makes logs more readable.