12-06-2019, 02:42 PM
(12-06-2019, 01:49 PM)zaius Wrote:(12-06-2019, 04:07 AM)danielt Wrote:(12-05-2019, 11:59 AM)zaius Wrote: Do any of the Pine computers use 5V for UART serial console?
I'm pretty new in this neighbourhood (I only got sucked in after meeting @Luke at FOSDEM 2019) but I don't think so. The other UART adapter in the Pine store is multi-voltage but is always photographed configured in 3v3 mode.
There is also this post:
https://forum.pine64.org/showthread.php?...0#pid53150
Pine sells these little boards:
https://store.pine64.org/?product=padi-serial-console
https://store.pine64.org/?product=pine64...programmer
but only one cable:
https://store.pine64.org/?product=pinebo...al-console
If that cable is 5V as reported, and xalius is correct, then Pine should stop selling it for use with the Pinebook and PBP.
There is also this issue here:
https://nixos.wiki/wiki/NixOS_on_ARM/PIN...al_console
So it is possibly it is both the wrong voltage, and the wrong chipset.
To provide some additional information about the genuine Pinebook console adapter I purchased from the Pine store I pried off the covers from the USB plug end...
Chip used is a CH340G on the underside with passive components and just a 12MHz crystal on the top side
There is no 3v/5v selection capability - only the connection holes for the wires.
There are five solder holes opposite the USB plug
It uses a 900mm-long four-core signal cable...
Red wire to 5v connection (snipped off inside the jack plug end)
White wire to RxD connection
Green wire to TxD connection
Black wire to GND connection
no wire to 3v connection
As stated I measured 5v on the TXD and RXD connections at the 3.5mm 4-pole plug end.
Never "used in anger" - could it have killed or damaged the Pinebook and possibly the Pinebook Pro if I had tried to use it?