addition GPIO Feather M4
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Please be positive and constructive with your questions and comments.
- gary7
- Posts: 4
- Joined: Sat Mar 06, 2021 12:52 pm
addition GPIO Feather M4
I am using a Adafruit Feather M4 and I have run out of I/O. Is it possible to add additional I/O by soldering onto the unused microprocessor pins? How to reference?
- adafruit_support_carter
- Posts: 29457
- Joined: Tue Nov 29, 2016 2:45 pm
Re: addition GPIO Feather M4
You could use the Feather M4 schematics and PCB files:
https://learn.adafruit.com/adafruit-fea ... /downloads
along with the SAMD51 datasheet for reference.
However, it would be *much* easier to add a GPIO expander.
https://www.adafruit.com/product/5346
(there are other options as well)
https://learn.adafruit.com/adafruit-fea ... /downloads
along with the SAMD51 datasheet for reference.
However, it would be *much* easier to add a GPIO expander.
https://www.adafruit.com/product/5346
(there are other options as well)
- gary7
- Posts: 4
- Joined: Sat Mar 06, 2021 12:52 pm
Re: addition GPIO Feather M4
I can get to the pins and I am familiar with the hardware. I just don't know how to reference a processor pin in the Arduino software.
- adafruit_support_carter
- Posts: 29457
- Joined: Tue Nov 29, 2016 2:45 pm
Re: addition GPIO Feather M4
You would need to alter the board definition in the Arduino core.
Please be positive and constructive with your questions and comments.