03-11-2020, 08:53 AM
(This post was last modified: 03-11-2020, 08:58 AM by danielt.
Edit Reason: One does not dump voltage, one applies it ;-)
)
(03-10-2020, 11:56 AM)zaius Wrote: The crash during boot might be unrelated to the voltage:
"Note: It is not recommended to connect the serial adapter to pin 10 (RX) while booting, as this often causes the board to hang early in the bootloader. Disconnecting pin 10 still allows the serial console to be viewed, and it can be reconnected after the board boots, allowing interaction with the console."
https://nixos.wiki/wiki/NixOS_on_ARM/PIN...al_console
Regardless, Pine should sell a 3.3V adapter, with the correct chipset. I have no idea why they are selling a 5V adapter when, as far as I know, none of the Pine computers use 5V UART.
I've seen this note before and I assumed that is was entirely related to the bad voltage (although that doesn't mean that I am right
).Basically a TTL serial device "parks" at logic high and will always send out 3.3v or 5v when it is not sending characters. In other words unless you are actively typing then there isn't really anything except for the voltage being applied to the RX pin that could be causing the board to hang.
It is not impossible that there are also crashes when 3.3v is applied to the RX pin but I haven't seen any reports of that on the forum (although now the PBP has become so popular I no longer have time to read all the threads). On the other hand I have seen many reports about problems with the 5v adapter.
