Thank you for everyone's suggestions. I'm definitely connected to the
correct serial port for configuration and communication using com port
settings 9600,n,8,1. When power is applied I get various boot messages
before being presented with a ">" prompt whereupon I can enter "help"
and get some help text. During the boot process there is prompt
indicating there is a 2 second delay where sending any character will
interrupt the boot process - but when I do that the system goes quiet
and doesn't appear to do anything else.
BTW, for anyone interested, inside the unit, it is a custom PCB (fairly
large) with a GPS module (Motorola Oncore maybe?) and can be built with
either a small 10MHz oscillator or a much larger TCXO. There's a
lithium battery holder - but suspect that is just for the local RTC
rather than backing up SRAM which might hold the passwords. I tried
removing and replacing the battery anyway to no avail. Lots of the other
options available (such as clock out) have most of the components
missing from the board - it would not be a trivial task to go through
and add them. All other connections to the outside world appear
protected against ESD which is nice to see.
I will investigate whether the bootloader can offer anything - but the
main prompt seems to be generated by the application rather than a
regular "Linux" type login.
The reason I have this unit is I wanted to confirm (and compare against
a commercial unit) operation of a cape and SD card image I am putting
together (first PCBs arriving next week) for the Beaglebone - the plan
being to have a low cost design available for anyone wanting their own
NTP server (or just wants a GPS cape for their BB).
David.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
