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path: root/drivers/sensors/cirque_pinnacle_gestures.c
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Diffstat (limited to 'drivers/sensors/cirque_pinnacle_gestures.c')
-rw-r--r--drivers/sensors/cirque_pinnacle_gestures.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/drivers/sensors/cirque_pinnacle_gestures.c b/drivers/sensors/cirque_pinnacle_gestures.c
new file mode 100644
index 0000000000..70f16527ba
--- /dev/null
+++ b/drivers/sensors/cirque_pinnacle_gestures.c
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+/* Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
+ * Copyright 2022 Daniel Kao <daniel.m.kao@gmail.com>
+ *
+ * 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 <stdlib.h>
+#include <lib/lib8tion/lib8tion.h>
+#include "cirque_pinnacle_gestures.h"
+#include "pointing_device.h"
+#include "timer.h"
+#include "wait.h"
+
+#if defined(CIRQUE_PINNACLE_TAP_ENABLE) || defined(CIRQUE_PINNACLE_CIRCULAR_SCROLL_ENABLE)
+static cirque_pinnacle_features_t features = {.tap_enable = true, .circular_scroll_enable = true};
+#endif
+
+#ifdef CIRQUE_PINNACLE_TAP_ENABLE
+static trackpad_tap_context_t tap;
+
+static report_mouse_t trackpad_tap(report_mouse_t mouse_report, pinnacle_data_t touchData) {
+ if (touchData.touchDown != tap.touchDown) {
+ tap.touchDown = touchData.touchDown;
+ if (!touchData.zValue) {
+ if (timer_elapsed(tap.timer) < CIRQUE_PINNACLE_TAPPING_TERM && tap.timer != 0) {
+ mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, true, POINTING_DEVICE_BUTTON1);
+ pointing_device_set_report(mouse_report);
+ pointing_device_send();
+# if TAP_CODE_DELAY > 0
+ wait_ms(TAP_CODE_DELAY);
+# endif
+ mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, false, POINTING_DEVICE_BUTTON1);
+ pointing_device_set_report(mouse_report);
+ pointing_device_send();
+ }
+ }
+ tap.timer = timer_read();
+ }
+ if (timer_elapsed(tap.timer) > (CIRQUE_PINNACLE_TOUCH_DEBOUNCE)) {
+ tap.timer = 0;
+ }
+
+ return mouse_report;
+}
+
+void cirque_pinnacle_enable_tap(bool enable) {
+ features.tap_enable = enable;
+}
+#endif
+
+#ifdef CIRQUE_PINNACLE_CIRCULAR_SCROLL_ENABLE
+/* To set a trackpad exclusively as scroll wheel: outer_ring_pct = 100, trigger_px = 0, trigger_ang = 0 */
+static circular_scroll_context_t scroll = {.config = {.outer_ring_pct = 33,
+ .trigger_px = 16,
+ .trigger_ang = 9102, /* 50 degrees */
+ .wheel_clicks = 18}};
+
+static inline uint16_t atan2_16(int32_t dy, int32_t dx) {
+ if (dy == 0) {
+ if (dx >= 0) {
+ return 0;
+ } else {
+ return 32768;
+ }
+ }
+
+ int32_t abs_y = dy > 0 ? dy : -dy;
+ int16_t a;
+
+ if (dx >= 0) {
+ a = 8192 - (8192 * (dx - abs_y) / (dx + abs_y));
+ } else {
+ a = 24576 - (8192 * (dx + abs_y) / (abs_y - dx));
+ }
+
+ if (dy < 0) {
+ return -a; // negate if in quad III or IV
+ }
+ return a;
+}
+
+static circular_scroll_t circular_scroll(pinnacle_data_t touchData) {
+ circular_scroll_t report = {0, 0, false};
+ int8_t x, y, wheel_clicks;
+ uint8_t center = 256 / 2, mag;
+ int16_t ang, dot, det, opposite_side, adjacent_side;
+ uint16_t scale = cirque_pinnacle_get_scale();
+
+ if (touchData.zValue) {
+ /*
+ * Place origin at center of trackpad, treat coordinates as vectors.
+ * Scale to fixed int8_t size; angles are independent of resolution.
+ */
+ if (scale) {
+ x = (int8_t)((int32_t)touchData.xValue * 256 / scale - center);
+ y = (int8_t)((int32_t)touchData.yValue * 256 / scale - center);
+ } else {
+ x = 0;
+ y = 0;
+ }
+
+ /* Check if first touch */
+ if (!scroll.z) {
+ report.suppress_touch = false;
+ /* Check if touch falls within outer ring */
+ mag = sqrt16(x * x + y * y);
+ if (mag * 100 / center >= 100 - scroll.config.outer_ring_pct) {
+ scroll.state = SCROLL_DETECTING;
+ scroll.x = x;
+ scroll.y = y;
+ scroll.mag = mag;
+ /*
+ * Decide scroll axis:
+ * Vertical if started from righ half
+ * Horizontal if started from left half
+ * Flipped for left-handed
+ */
+# if defined(POINTING_DEVICE_ROTATION_90)
+ scroll.axis = y < 0;
+# elif defined(POINTING_DEVICE_ROTATION_180)
+ scroll.axis = x > 0;
+# elif defined(POINTING_DEVICE_ROTATION_270)
+ scroll.axis = y > 0;
+# else
+ scroll.axis = x < 0;
+# endif
+ }
+ } else if (scroll.state == SCROLL_DETECTING) {
+ report.suppress_touch = true;
+ /* Already detecting scroll, check movement from touchdown location */
+ mag = sqrt16((x - scroll.x) * (x - scroll.x) + (y - scroll.y) * (y - scroll.y));
+ if (mag >= scroll.config.trigger_px) {
+ /*
+ * Find angle of movement.
+ * 0 degrees here means movement towards center of circle
+ */
+ dot = scroll.x * x + scroll.y * y;
+ det = scroll.x * y - scroll.y * x;
+ opposite_side = abs(det); /* Based on scalar rejection */
+ adjacent_side = abs(scroll.mag * scroll.mag - abs(dot)); /* Based on scalar projection */
+ ang = (int16_t)atan2_16(opposite_side, adjacent_side);
+ if (ang < scroll.config.trigger_ang) {
+ /* Not a scroll, release coordinates */
+ report.suppress_touch = false;
+ scroll.state = NOT_SCROLL;
+ } else {
+ /* Scroll detected */
+ scroll.state = SCROLL_VALID;
+ }
+ }
+ }
+ if (scroll.state == SCROLL_VALID) {
+ report.suppress_touch = true;
+ dot = scroll.x * x + scroll.y * y;
+ det = scroll.x * y - scroll.y * x;
+ ang = (int16_t)atan2_16(det, dot);
+ wheel_clicks = ((int32_t)ang * scroll.config.wheel_clicks) / 65536;
+ if (wheel_clicks >= 1 || wheel_clicks <= -1) {
+ if (scroll.config.left_handed) {
+ if (scroll.axis == 0) {
+ report.h = -wheel_clicks;
+ } else {
+ report.v = wheel_clicks;
+ }
+ } else {
+ if (scroll.axis == 0) {
+ report.v = -wheel_clicks;
+ } else {
+ report.h = wheel_clicks;
+ }
+ }
+ scroll.x = x;
+ scroll.y = y;
+ }
+ }
+ }
+
+ scroll.z = touchData.zValue;
+ if (!scroll.z) scroll.state = SCROLL_UNINITIALIZED;
+
+ return report;
+}
+
+void cirque_pinnacle_enable_circular_scroll(bool enable) {
+ features.circular_scroll_enable = enable;
+}
+
+void cirque_pinnacle_configure_circular_scroll(uint8_t outer_ring_pct, uint8_t trigger_px, uint16_t trigger_ang, uint8_t wheel_clicks, bool left_handed) {
+ scroll.config.outer_ring_pct = outer_ring_pct;
+ scroll.config.trigger_px = trigger_px;
+ scroll.config.trigger_ang = trigger_ang;
+ scroll.config.wheel_clicks = wheel_clicks;
+ scroll.config.left_handed = left_handed;
+}
+#endif
+
+bool cirque_pinnacle_gestures(report_mouse_t* mouse_report, pinnacle_data_t touchData) {
+ bool suppress_mouse_update = false;
+
+#ifdef CIRQUE_PINNACLE_CIRCULAR_SCROLL_ENABLE
+ circular_scroll_t scroll_report;
+ if (features.circular_scroll_enable) {
+ scroll_report = circular_scroll(touchData);
+ mouse_report->v = scroll_report.v;
+ mouse_report->h = scroll_report.h;
+ suppress_mouse_update = scroll_report.suppress_touch;
+ }
+#endif
+
+#ifdef CIRQUE_PINNACLE_TAP_ENABLE
+ if (features.tap_enable) {
+ *mouse_report = trackpad_tap(*mouse_report, touchData);
+ }
+#endif
+
+ return suppress_mouse_update;
+}
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