Glasgow Embedded / Glasgow - History

revC1: update schematic with current/voltage figures for LEDs

applet..spi_master: add delay commands.

These can be very useful if the SPI device requires specific timings;
in particular, for small delays (e.g. 10 us between commands) it is
much more efficient to implement these as subtarget commands than it
would be to wait on the host.

The synchronize method is useful for e.g. the following pattern:

await spi_iface.write(...)
await spi_iface.delay_ms(...)
await device.write_register(...)

or in other words, in any case that SPI delays should have a defined
phase relationship to any other actions.

gateware.analyzer: only flush output FIFO if supported.

applet..spi_master: release SS for at least one half period.

{target,gateware}.analyzer: use explicit flush.

This makes USB bandwidth use more efficient.