The attached files will be included as library components in the next Alchitry Labs release but you can use them to talk to the Ft in the meantime.
Most of the pins on the module connect directly to the top-level pins for the FT600. The pins prefixed with ui_ are for you to use.
It should be pretty straight forward to use. It acts kind of like a FIFO but it will spit data out as it reads it. The one thing to note is the data valid flags are two bits wide, one for each byte. Typically, you’d set them to 2b11.