PineTime case
01-30-2020, 05:20 AM
So... has anyone found a fabric strap with a loose enough weave to integrate the SWD wires as a feature of the design ;-)
Actually I might have stumbled upon a new idea...
I think the *smallest* number of additional conductors that needs to come out is 2, SWDIO and SWCLK? In other words there is already a ground as part of the charging pins and there is no need to share the 3v3 if your SWD programmer has its own 3v3 voltage reference?
If that's the case then I think a *very* subtle mod might be possible whilst still allowing access for an SWD programmer: drill small holes very carefully through plastic casing to reveal the chassis of both of the magnets. The holes should be just enough to allow access using pogo pin. After that all that should be needed inside the watch is to run hookup wire from the SWDIO and SWCLK to the body of each magnet and seal it all up.
Bonus marks are available for managed to solder ESD protection diodes to the hook up wires ;-)... possible I think but pretty fiddly.
Actually I might have stumbled upon a new idea...
I think the *smallest* number of additional conductors that needs to come out is 2, SWDIO and SWCLK? In other words there is already a ground as part of the charging pins and there is no need to share the 3v3 if your SWD programmer has its own 3v3 voltage reference?
If that's the case then I think a *very* subtle mod might be possible whilst still allowing access for an SWD programmer: drill small holes very carefully through plastic casing to reveal the chassis of both of the magnets. The holes should be just enough to allow access using pogo pin. After that all that should be needed inside the watch is to run hookup wire from the SWDIO and SWCLK to the body of each magnet and seal it all up.
Bonus marks are available for managed to solder ESD protection diodes to the hook up wires ;-)... possible I think but pretty fiddly.