Fixes cursor movement lagging or jumping since 2.1.4+#7

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Erictoby wants to merge 6 commits intocoolstar:masterfrom

Erictoby:master

Commits on Sep 2, 2019

Fixes cursor movement lagging or jumping since 2.1.4+
Erictoby
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Commits on Sep 8, 2019

Fixes deadlock or delays in interrupt loop.
Erictoby
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Commits on Sep 14, 2019

Enable GPIO interrupt after initing all parameters
Erictoby
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Commits on Sep 23, 2019

Minor change - PMInit location.
Erictoby
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Commits on Sep 28, 2019

Reduce CPU load caused by too many GPIO interrupts
Erictoby
authored

Commits on Oct 11, 2019

Merge pull request #1 from coolstar/master
Erictoby
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