Some of the transceiver pull-up/downs don't seem to work as
expected. Until further analysis, we perform equivalent testing
in TRX_OFF, which only uses the MCU's pull-ups.
- prod/atusb: added clock frequency test
- prod/doc/setup.hmac: added GSL (libgsl) build dependency
- prod/doc/setup.hmac: recommend use of NTP on the PC
- prod/doc/test.hmac: added atusb to the clock frequency section
- Makefile: define driver names depending on device role
- Makefile: changed title comment to indicate that this Makefile is no
longer considered just a convenience hack
- atusb: define USB_ID via a variable instead of hard-coding it
- atusb (flash, dfu): removed (to be handled by separate script)
- atusb (enumerate): implemented enumeration test
- atusb: enabled "identify", since the local anomaly has been solved
- prod/Common: added section titles
- prod/Common (begin): new command to set up and check the test environment
- prof/atben: call "begin" to set up the test environment
- prod/Common (spectrum): added the profile
- prod/Makefile: convenience commands, for development
- prod/atben: run "identify" after checking the GPIOs
- prod/atusb: test script for ATUSB
