Description
I was trying to use the stemma pins on some feather or qt py adafruit boards without using i2c (using other interfaces or simply the underlying gpios)
and i noticed that there is no easy way to identify these pins without consulting code, datasheets or other resources...
while one can use board.STEMMA_i2C
to create the i2c interface, i believe there should be a way to use these pins with other interfaces.
example1:
import board
import digitalio
led1 = digitalio.DigitalInOut(board.STEMMA_SDA)
led2 = digitalio.DigitalInOut(board.STEMMA_SCL)
example 2, a class/object named STEMMA to make it more clear:
import board
import digitalio
led1 = digitalio.DigitalInOut(board.STEMMA.SDA)
led2 = digitalio.DigitalInOut(board.STEMMA.SCL)
Currently the naming is something like "SDA", "SDA1" which is OK, but there could be aliases, or a better naming system for these pins so one can easily reference those as stemma pins and not look up which sda interface that pin is connected to
another example that i noticed is in the esp32-c6, the stemma 3 volt line is actually gpio20 (IIRC) which is currently named as neopixel power, however this doesn't make it clear that this "neopixel power" is also the stemma VCC pin.