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diff --git a/keyboards/ploopyco/trackball_mini/trackball_mini.c b/keyboards/ploopyco/trackball_mini/trackball_mini.c
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+/* Copyright 2021 Colin Lam (Ploopy Corporation)
+ * Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
+ * Copyright 2019 Sunjun Kim
+ * Copyright 2019 Hiroyuki Okada
+ *
+ * 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/>.
+ */
+
+#include "trackball_mini.h"
+
+#ifndef OPT_DEBOUNCE
+# define OPT_DEBOUNCE 5 // (ms) Time between scroll events
+#endif
+
+#ifndef SCROLL_BUTT_DEBOUNCE
+# define SCROLL_BUTT_DEBOUNCE 100 // (ms) Time between scroll events
+#endif
+
+#ifndef OPT_THRES
+# define OPT_THRES 150 // (0-1024) Threshold for actication
+#endif
+
+#ifndef OPT_SCALE
+# define OPT_SCALE 1 // Multiplier for wheel
+#endif
+
+#ifndef PLOOPY_DPI_OPTIONS
+# define PLOOPY_DPI_OPTIONS { CPI375, CPI750, CPI1375 }
+# ifndef PLOOPY_DPI_DEFAULT
+# define PLOOPY_DPI_DEFAULT 2
+# endif
+#endif
+
+#ifndef PLOOPY_DPI_DEFAULT
+# define PLOOPY_DPI_DEFAULT 1
+#endif
+
+// Transformation constants for delta-X and delta-Y
+const static float ADNS_X_TRANSFORM = -1.0;
+const static float ADNS_Y_TRANSFORM = 1.0;
+
+keyboard_config_t keyboard_config;
+uint16_t dpi_array[] = PLOOPY_DPI_OPTIONS;
+#define DPI_OPTION_SIZE (sizeof(dpi_array) / sizeof(uint16_t))
+
+// TODO: Implement libinput profiles
+// https://wayland.freedesktop.org/libinput/doc/latest/pointer-acceleration.html
+// Compile time accel selection
+// Valid options are ACC_NONE, ACC_LINEAR, ACC_CUSTOM, ACC_QUADRATIC
+
+// Trackball State
+bool is_scroll_clicked = false;
+bool BurstState = false; // init burst state for Trackball module
+uint16_t MotionStart = 0; // Timer for accel, 0 is resting state
+uint16_t lastScroll = 0; // Previous confirmed wheel event
+uint16_t lastMidClick = 0; // Stops scrollwheel from being read if it was pressed
+uint8_t OptLowPin = OPT_ENC1;
+bool debug_encoder = false;
+
+__attribute__((weak)) void process_wheel_user(report_mouse_t* mouse_report, int16_t h, int16_t v) {
+ mouse_report->h = h;
+ mouse_report->v = v;
+}
+
+__attribute__((weak)) void process_wheel(report_mouse_t* mouse_report) {
+ // If the mouse wheel was just released, do not scroll.
+ if (timer_elapsed(lastMidClick) < SCROLL_BUTT_DEBOUNCE)
+ return;
+
+ // Limit the number of scrolls per unit time.
+ if (timer_elapsed(lastScroll) < OPT_DEBOUNCE)
+ return;
+
+ // Don't scroll if the middle button is depressed.
+ if (is_scroll_clicked) {
+#ifndef IGNORE_SCROLL_CLICK
+ return;
+#endif
+ }
+
+ lastScroll = timer_read();
+ uint16_t p1 = adc_read(OPT_ENC1_MUX);
+ uint16_t p2 = adc_read(OPT_ENC2_MUX);
+
+ if (debug_encoder)
+ dprintf("OPT1: %d, OPT2: %d\n", p1, p2);
+
+ uint8_t dir = opt_encoder_handler(p1, p2);
+
+ if (dir == 0)
+ return;
+
+ process_wheel_user(mouse_report, mouse_report->h, (int)(mouse_report->v + (dir * OPT_SCALE)));
+}
+
+__attribute__((weak)) void process_mouse_user(report_mouse_t* mouse_report, int16_t x, int16_t y) {
+ // x and y are swapped
+ // the sensor is rotated
+ // by 90 degrees
+ int16_t temp = x;
+ x = y;
+ y = temp;
+
+ // Apply delta-X and delta-Y transformations.
+ float xt = (float) x * ADNS_X_TRANSFORM;
+ float yt = (float) y * ADNS_Y_TRANSFORM;
+
+ int16_t xti = xt;
+ int16_t yti = yt;
+
+ mouse_report->x = xti;
+ mouse_report->y = yti;
+}
+
+__attribute__((weak)) void process_mouse(report_mouse_t* mouse_report) {
+ report_adns_t data = adns_read_burst();
+
+ if (data.dx != 0 || data.dy != 0) {
+ if (debug_mouse)
+ dprintf("Raw ] X: %d, Y: %d\n", data.dx, data.dy);
+
+ process_mouse_user(mouse_report, data.dx, data.dy);
+ }
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t* record) {
+ xprintf("KL: kc: %u, col: %u, row: %u, pressed: %u\n", keycode, record->event.key.col, record->event.key.row, record->event.pressed);
+
+ // Update Timer to prevent accidental scrolls
+ if ((record->event.key.col == 1) && (record->event.key.row == 0)) {
+ lastMidClick = timer_read();
+ is_scroll_clicked = record->event.pressed;
+ }
+
+ if (!process_record_user(keycode, record))
+ return false;
+
+ if (keycode == DPI_CONFIG && record->event.pressed) {
+ keyboard_config.dpi_config = (keyboard_config.dpi_config + 1) % DPI_OPTION_SIZE;
+ eeconfig_update_kb(keyboard_config.raw);
+ adns_set_cpi(dpi_array[keyboard_config.dpi_config]);
+ }
+
+/* If Mousekeys is disabled, then use handle the mouse button
+ * keycodes. This makes things simpler, and allows usage of
+ * the keycodes in a consistent manner. But only do this if
+ * Mousekeys is not enable, so it's not handled twice.
+ */
+#ifndef MOUSEKEY_ENABLE
+ if (IS_MOUSEKEY_BUTTON(keycode)) {
+ report_mouse_t currentReport = pointing_device_get_report();
+ if (record->event.pressed) {
+ currentReport.buttons |= 1 << (keycode - KC_MS_BTN1);
+ } else {
+ currentReport.buttons &= ~(1 << (keycode - KC_MS_BTN1));
+ }
+ pointing_device_set_report(currentReport);
+ pointing_device_send();
+ }
+#endif
+
+ return true;
+}
+
+// Hardware Setup
+void keyboard_pre_init_kb(void) {
+ // debug_enable = true;
+ // debug_matrix = true;
+ debug_mouse = true;
+ // debug_encoder = true;
+
+ setPinInput(OPT_ENC1);
+ setPinInput(OPT_ENC2);
+
+ /* Ground all output pins connected to ground. This provides additional
+ * pathways to ground. If you're messing with this, know this: driving ANY
+ * of these pins high will cause a short. On the MCU. Ka-blooey.
+ */
+#ifdef UNUSED_PINS
+ const pin_t unused_pins[] = UNUSED_PINS;
+
+ for (uint8_t i = 0; i < (sizeof(unused_pins) / sizeof(pin_t)); i++) {
+ setPinOutput(unused_pins[i]);
+ writePinLow(unused_pins[i]);
+ }
+#endif
+
+ keyboard_pre_init_user();
+}
+
+void pointing_device_init(void) {
+ adns_init();
+ opt_encoder_init();
+}
+
+void pointing_device_task(void) {
+ report_mouse_t mouse_report = pointing_device_get_report();
+ process_wheel(&mouse_report);
+ process_mouse(&mouse_report);
+ pointing_device_set_report(mouse_report);
+ pointing_device_send();
+}
+
+void eeconfig_init_kb(void) {
+ keyboard_config.dpi_config = PLOOPY_DPI_DEFAULT;
+ eeconfig_update_kb(keyboard_config.raw);
+ eeconfig_init_user();
+}
+
+void matrix_init_kb(void) {
+ // is safe to just read DPI setting since matrix init
+ // comes before pointing device init.
+ keyboard_config.raw = eeconfig_read_kb();
+ if (keyboard_config.dpi_config > DPI_OPTION_SIZE) {
+ eeconfig_init_kb();
+ }
+ matrix_init_user();
+}
+
+void keyboard_post_init_kb(void) {
+ adns_set_cpi(dpi_array[keyboard_config.dpi_config]);
+
+ keyboard_post_init_user();
+}