diff options
Diffstat (limited to 'drivers/sensors/cirque_pinnacle_gestures.c')
| -rw-r--r-- | drivers/sensors/cirque_pinnacle_gestures.c | 226 |
1 files changed, 226 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..f6f9177e08 --- /dev/null +++ b/drivers/sensors/cirque_pinnacle_gestures.c @@ -0,0 +1,226 @@ +/* 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" + +#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; +} |