Glasgow Embedded / Glasgow - History

applet.control.gpio: allow interacting with pins from CLI.

This is very useful to set strap pins, e.g. if you have a system reset
connected to pin `B7` and it must be asserted for JTAG to work:

glasgow multi jtag-probe <...> ++ gpio --pins B7 B7=0

It is also possible to set pins to drive weakly (e.g. use the `B7=H` or
`B7=L` as an argument), and to sample pins (e.g. use `B6` as an
argument).

applet.interface.jtag_probe: make `scan` the default operation.

applet.interface.jtag_xvc: enable offset sampling.

This makes the applet work at 48 MHz.

gateware.iostream: remove in favor of new `IOStreamer`.