Refactor of GPIO

[andrewdavidmackenzie]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 14%. Comparing base (eda2508) to head (1c846da).

❗ Current head 1c846da differs from pull request most recent head 6da8626. Consider uploading reports for the commit 6da8626 to get more accurate results

Files	Patch %	Lines
src/piggui.rs	0%	6 Missing ⚠️

Additional details and impacted files

@@         Coverage Diff          @@
##           master   #23   +/-   ##
====================================
+ Coverage      12%   14%   +2%     
====================================
  Files           4     4           
  Lines         106    92   -14     
====================================
  Hits           12    12           
+ Misses         94    80   -14     

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