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diff --git a/users/muppetjones/features/etchamouse.h b/users/muppetjones/features/etchamouse.h
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+++ b/users/muppetjones/features/etchamouse.h
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+/* Copyright 2020 Stephen J. Bush
+ *
+ * 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
+
+#if defined(POINTING_DEVICE_ENABLE) && defined(ENCODER_ENABLE)
+
+/* max value on report descriptor */
+#    ifndef MOUSEKEY_MOVE_MAX
+#        define MOUSEKEY_MOVE_MAX 127
+#    elif MOUSEKEY_MOVE_MAX > 127
+#        error MOUSEKEY_MOVE_MAX needs to be smaller than 127
+#    endif
+#    ifndef MOUSEKEY_MOVE_DELTA
+#        define MOUSEKEY_MOVE_DELTA 25
+#    endif
+#    ifndef MOUSEKEY_INITIAL_SPEED
+#        define MOUSEKEY_INITIAL_SPEED 100
+#    endif
+#    ifndef MOUSEKEY_INTERVAL
+#        define MOUSEKEY_INTERVAL 75
+#    endif
+
+/** Amount of time (ms) before zeroing out the count.
+ *  A higher value will result in smoother curves but may lower accuracy
+ */
+#    ifndef TAPPING_TERM_PERSISTENCE
+#        define TAPPING_TERM_PERSISTENCE 150
+#    endif
+
+/** Amount of time (ms) to register consecutive key presses
+ *  A higher value will smooth out mouse movement and increase speed for
+ *  consecutive presses.
+ */
+#    ifndef TAPPING_TERM_MOUSE_ENCODER
+#        define TAPPING_TERM_MOUSE_ENCODER 50
+#    endif
+
+/** @brief Update mouse position based on encoder movement.
+ *  @param index The encoder index. 0 controls x-axis; 1 controls y-axis.
+ *  @param clockwise Indicates direction encoder was turned.
+ *  @returns None.
+ */
+bool encoder_update_mouse(uint8_t index, bool clockwise);
+
+#endif