A tool to connect to the computer debug interfaces was developed. It can either be used in a open case or closed case configuration. It's in an expansion card form factor, so it can be docked inside a DUT.
It's based around an FT4232 for ease of development and broad software tool support.
# FTDI Channel usages:
Channel 1 is for:
JDB11, SPI interface
Channel 2 is for:
JSPI, SPI interface
Channel 3 is for:
JECDB, EC uart pins
CCD (either EC or AP, depending on which type-C port the user plugged it in)
Channel 4 is for:
JECDB, AP uart pins`