"SCK in use" error with Metro M4 Express and 2.8 TFT running ili9341_shield_simpletest.py

[jpecor]

I was trying to recreate a PyPortal bug today with a Metro M4 Express and a 2.8" TFT shield. I grabbed the ili9341_shield_simpletest.py example code and got this error:

code.py output: Traceback (most recent call last): File "code.py", line 17, in <module> ValueError: SCK in use

If I change from this:
spi = board.SPI()

to this (including the import of busio):
spi = busio.SPI(board.D13, board.D11)

the program runs correctly.

[makermelissa]

Hi. With the Metro M4 Express, you need to use the ICSP header to access the SPI pins rather than Pins 11-13.

[makermelissa]

Here's the guide page about this: https://learn.adafruit.com/adafruit-2-8-tft-touch-shield-v2/circuitpython-displayio-quickstart

[makermelissa]

Reopening because after talking with Jason, adding the Software SPI as an option into the example is a good idea.

[jpecor]

Thanks Melissa!