Originally Posted by
titis14
Hi,
Thanks for the work, and it's great to be able to easily order from JLCPCB. We still need to figure out how to program the ATTINY. Earlier, we mentioned the Adafruit High Voltage UPDI Friend, but I see it only has one UPDI pin, so do we just connect GND, PWR to VTG, and UPDI to UPDI?
Is there a place in the transponder code to change the number?
Thanks
In the 3V mode, this should work:
GND->GND
PWR->VTG
UPDI->UPDI
This scheme relies on the reverse current protection of the voltage regulator. I'm programming them this way.
(The atmel-ice does not provide power to the board, VTG is meant for Atmel-ICE to find the voltage of IO lines; I just supply +3.3V externally to VTG as well).
The transponder number is generated from the serial number of the MCU. You can
override it.