[Keyboard] Add PloopyCo devices (#7935)

* Initial Commit for Ploopyco Trackball

This is a WIP at this point.  Most of it compiles, but the SPI commands are non-functioning as they come from Arduino, so don't exist in LUFA

* Convert SPI commands from arduino to LUFA

But I have no idea if this is actually correct or not

* Update keyboard readme

* Clean up ploopyco trackball

* Update readme

* Update mouse key stuff

* last minutue cleanup

* Add caveat about scroll wheel

* Fixup to code

* Additional fixup

* Add movement multiplier

* Rename folders

* mid changes

* temp

* Got it working!!!!!

* Additional cleanup of code

* Make unused pin calls more compact

* Rotation info

* Add debouncing checks

* Make everything replaceable

* Add info.json

* Include ISP flashing info

* Better handling for user customization

* Reconfigure CPI stuff

* fix issues with debug printing

* Fix tiny scroll issue

* Add and update scroll code from ploopy mouse

* Update licensing

* Add PloopyCo Mouse

* Cleanup and layout stuff

* Move common files to main folder for reuse

* Increase polling rate

* Update image for mouse

* Apply changes from code review

* Add VIA support

1 files changed, 66 insertions, 0 deletions

diff --git a/keyboards/ploopyco/opt_encoder.h b/keyboards/ploopyco/opt_encoder.h
new file mode 100644
index 0000000000..23a170d59f
--- /dev/null
+++ b/keyboards/ploopyco/opt_encoder.h
@@ -0,0 +1,66 @@
+/* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
+ * Copyright 2020 Ploopy Corporation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <stdbool.h>
+
+#ifndef SCROLLER_AR_SIZE
+#    define SCROLLER_AR_SIZE 31
+#endif
+
+#ifndef SCROLL_THRESH_RANGE_LIM
+#    define SCROLL_THRESH_RANGE_LIM 10
+#endif
+
+enum State { HIHI, HILO, LOLO, LOHI };
+
+enum State state;
+
+/* Variables used for scroll wheel functionality. */
+bool lohif;
+bool hilof;
+int  lowA;
+int  highA;
+bool cLowA;
+bool cHighA;
+int  lowIndexA;
+int  highIndexA;
+bool lowOverflowA;
+bool highOverflowA;
+int  lowB;
+int  highB;
+bool cLowB;
+bool cHighB;
+int  lowIndexB;
+int  highIndexB;
+bool lowOverflowB;
+bool highOverflowB;
+int  scrollThresholdA;
+int  scrollThresholdB;
+int  arLowA[SCROLLER_AR_SIZE];
+int  arHighA[SCROLLER_AR_SIZE];
+int  arLowB[SCROLLER_AR_SIZE];
+int  arHighB[SCROLLER_AR_SIZE];
+
+void calculateThresholdA(int curA);
+void calculateThresholdB(int curB);
+int  calculateThreshold(int cur, int* low, int* high, bool* cLow, bool* cHigh, int arLow[], int arHigh[], int* lowIndex, int* highIndex, bool* lowOverflow, bool* highOverflow);
+int  thresholdEquation(int lo, int hi);
+void incrementIndex(int* index, bool* ovflw);
+
+void opt_encoder_init(void);
+int  opt_encoder_handler(int curA, int curB);