Glasgow Embedded / Glasgow - History

gateware.analyzer: associate event sources with trigger types.

This makes it possible to show strobe-type events like FIFO I/O
much nicer in VCD files, which is also done in this commit.

gateware.analyzer: report accurate timestamp for DONE.

This commit also slightly optimizes the logic feeding the delay FIFO.

target.analyzer: reset analyzer on USB interface reset.

This makes timestamps start at a sensible boundary. Also, trigger
capture of pins immediately after reset to show their initial values
properly.

applet.nand_flash: slightly improve timings.

After the recent changes the applet can read 128M of flash with only
a handful of single bit errors (which are to be expected) and can now
be considered production quality.

Implement applet throttling for event analyzer.

This throttling implementation can either deny the applet any FIFO
I/O, or optionally stop it entirely, or also not use built-in
throttling for any specific applet. The default is to stop FIFO
communication because stopping the applet completely risks
misbehavior if the applet is driving something that CEInserter()
cannot handle, e.g. a DDR I/O pad instance.