addition GPIO Feather M4

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gary7
 
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addition GPIO Feather M4

Post by gary7 »

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?

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adafruit_support_carter
 
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Re: addition GPIO Feather M4

Post by adafruit_support_carter »

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)

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gary7
 
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Re: addition GPIO Feather M4

Post by gary7 »

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.

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Re: addition GPIO Feather M4

Post by adafruit_support_carter »

You would need to alter the board definition in the Arduino core.

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