qmk-firmware/quantum/pointing_device_drivers.c

/* Copyright 2017 Joshua Broekhuijsen <snipeye+qmk@gmail.com>
 * Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
 * Copyright 2021 Dasky (@daskygit)
 *
 * 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 "pointing_device.h"
#include "debug.h"
#include "wait.h"
#include "timer.h"
#include <stddef.h>

// hid mouse reports cannot exceed -127 to 127, so constrain to that value
#define constrain_hid(amt) ((amt) < -127 ? -127 : ((amt) > 127 ? 127 : (amt)))

// get_report functions should probably be moved to their respective drivers.
#if defined(POINTING_DEVICE_DRIVER_adns5050)
report_mouse_t adns5050_get_report(report_mouse_t mouse_report) {
    report_adns5050_t data = adns5050_read_burst();

    if (data.dx != 0 || data.dy != 0) {
#    ifdef CONSOLE_ENABLE
        if (debug_mouse) dprintf("Raw ] X: %d, Y: %d\n", data.dx, data.dy);
#    endif

        mouse_report.x = data.dx;
        mouse_report.y = data.dy;
    }

    return mouse_report;
}

// clang-format off
const pointing_device_driver_t pointing_device_driver = {
    .init         = adns5050_init,
    .get_report   = adns5050_get_report,
    .set_cpi      = adns5050_set_cpi,
    .get_cpi      = adns5050_get_cpi,
};
// clang-format on
#elif defined(POINTING_DEVICE_DRIVER_adns9800)

report_mouse_t adns9800_get_report_driver(report_mouse_t mouse_report) {
    report_adns9800_t sensor_report = adns9800_get_report();

    int8_t clamped_x = constrain_hid(sensor_report.x);
    int8_t clamped_y = constrain_hid(sensor_report.y);

    mouse_report.x = clamped_x;
    mouse_report.y = clamped_y;

    return mouse_report;
}

// clang-format off
const pointing_device_driver_t pointing_device_driver = {
    .init       = adns9800_init,
    .get_report = adns9800_get_report_driver,
    .set_cpi    = adns9800_set_cpi,
    .get_cpi    = adns9800_get_cpi
};
// clang-format on
#elif defined(POINTING_DEVICE_DRIVER_analog_joystick)
report_mouse_t analog_joystick_get_report(report_mouse_t mouse_report) {
    report_analog_joystick_t data = analog_joystick_read();

#    ifdef CONSOLE_ENABLE
    if (debug_mouse) dprintf("Raw ] X: %d, Y: %d\n", data.x, data.y);
#    endif

    mouse_report.x = data.x;
    mouse_report.y = data.y;

    mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, data.button, POINTING_DEVICE_BUTTON1);

    return mouse_report;
}

// clang-format off
const pointing_device_driver_t pointing_device_driver = {
    .init       = analog_joystick_init,
    .get_report = analog_joystick_get_report,
    .set_cpi    = NULL,
    .get_cpi    = NULL
};
// clang-format on
#elif defined(POINTING_DEVICE_DRIVER_cirque_pinnacle_i2c) || defined(POINTING_DEVICE_DRIVER_cirque_pinnacle_spi)
#    ifndef CIRQUE_PINNACLE_TAPPING_TERM
#        ifdef TAPPING_TERM_PER_KEY
#            include "action.h"
#            include "action_tapping.h"
#            define CIRQUE_PINNACLE_TAPPING_TERM get_tapping_term(KC_BTN1, NULL)
#        else
#            ifdef TAPPING_TERM
#                define CIRQUE_PINNACLE_TAPPING_TERM TAPPING_TERM
#            else
#                define CIRQUE_PINNACLE_TAPPING_TERM 200
#            endif
#        endif
#    endif
#    ifndef CIRQUE_PINNACLE_TOUCH_DEBOUNCE
#        define CIRQUE_PINNACLE_TOUCH_DEBOUNCE (CIRQUE_PINNACLE_TAPPING_TERM * 8)
#    endif

report_mouse_t cirque_pinnacle_get_report(report_mouse_t mouse_report) {
    pinnacle_data_t touchData = cirque_pinnacle_read_data();
    static uint16_t x = 0, y = 0, mouse_timer = 0;
    int8_t          report_x = 0, report_y = 0;
    static bool     is_z_down = false;

    cirque_pinnacle_scale_data(&touchData, cirque_pinnacle_get_scale(), cirque_pinnacle_get_scale());  // Scale coordinates to arbitrary X, Y resolution

    if (x && y && touchData.xValue && touchData.yValue) {
        report_x = (int8_t)(touchData.xValue - x);
        report_y = (int8_t)(touchData.yValue - y);
    }
    x = touchData.xValue;
    y = touchData.yValue;

    if ((bool)touchData.zValue != is_z_down) {
        is_z_down = (bool)touchData.zValue;
        if (!touchData.zValue) {
            if (timer_elapsed(mouse_timer) < CIRQUE_PINNACLE_TAPPING_TERM && mouse_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();
            }
        }
        mouse_timer = timer_read();
    }
    if (timer_elapsed(mouse_timer) > (CIRQUE_PINNACLE_TOUCH_DEBOUNCE)) {
        mouse_timer = 0;
    }
    mouse_report.x = report_x;
    mouse_report.y = report_y;

    return mouse_report;
}

// clang-format off
const pointing_device_driver_t pointing_device_driver = {
    .init       = cirque_pinnacle_init,
    .get_report = cirque_pinnacle_get_report,
    .set_cpi    = cirque_pinnacle_set_scale,
    .get_cpi    = cirque_pinnacle_get_scale
};
// clang-format on

#elif defined(POINTING_DEVICE_DRIVER_pimoroni_trackball)
report_mouse_t pimoroni_trackball_get_report(report_mouse_t mouse_report) {
    static uint16_t debounce      = 0;
    static uint8_t  error_count   = 0;
    pimoroni_data_t pimoroni_data = {0};
    static int16_t  x_offset = 0, y_offset = 0;

    if (error_count < PIMORONI_TRACKBALL_ERROR_COUNT) {
        i2c_status_t status = read_pimoroni_trackball(&pimoroni_data);

        if (status == I2C_STATUS_SUCCESS) {
            error_count = 0;

            if (!(pimoroni_data.click & 128)) {
                mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, false, POINTING_DEVICE_BUTTON1);
                if (!debounce) {
                    x_offset += pimoroni_trackball_get_offsets(pimoroni_data.right, pimoroni_data.left, PIMORONI_TRACKBALL_SCALE);
                    y_offset += pimoroni_trackball_get_offsets(pimoroni_data.down, pimoroni_data.up, PIMORONI_TRACKBALL_SCALE);
                    pimoroni_trackball_adapt_values(&mouse_report.x, &x_offset);
                    pimoroni_trackball_adapt_values(&mouse_report.y, &y_offset);
                } else {
                    debounce--;
                }
            } else {
                mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, true, POINTING_DEVICE_BUTTON1);
                debounce             = PIMORONI_TRACKBALL_DEBOUNCE_CYCLES;
            }
        } else {
            error_count++;
        }
    }
    return mouse_report;
}

// clang-format off
const pointing_device_driver_t pointing_device_driver = {
    .init       = pimoroni_trackball_device_init,
    .get_report = pimoroni_trackball_get_report,
    .set_cpi    = pimoroni_trackball_set_cpi,
    .get_cpi    = pimoroni_trackball_get_cpi
};
// clang-format on
#elif defined(POINTING_DEVICE_DRIVER_pmw3360)

static void init(void) { pmw3360_init(); }

report_mouse_t pmw3360_get_report(report_mouse_t mouse_report) {
    report_pmw3360_t data        = pmw3360_read_burst();
    static uint16_t  MotionStart = 0;  // Timer for accel, 0 is resting state

    if (data.isOnSurface && data.isMotion) {
        // Reset timer if stopped moving
        if (!data.isMotion) {
            if (MotionStart != 0) MotionStart = 0;
            return mouse_report;
        }

        // Set timer if new motion
        if ((MotionStart == 0) && data.isMotion) {
#    ifdef CONSOLE_ENABLE
            if (debug_mouse) dprintf("Starting motion.\n");
#    endif
            MotionStart = timer_read();
        }
        mouse_report.x = constrain_hid(data.dx);
        mouse_report.y = constrain_hid(data.dy);
    }

    return mouse_report;
}

// clang-format off
const pointing_device_driver_t pointing_device_driver = {
    .init       = init,
    .get_report = pmw3360_get_report,
    .set_cpi    = pmw3360_set_cpi,
    .get_cpi    = pmw3360_get_cpi
};
// clang-format on
#else
__attribute__((weak)) void           pointing_device_driver_init(void) {}
__attribute__((weak)) report_mouse_t pointing_device_driver_get_report(report_mouse_t mouse_report) { return mouse_report; }
__attribute__((weak)) uint16_t       pointing_device_driver_get_cpi(void) { return 0; }
__attribute__((weak)) void           pointing_device_driver_set_cpi(uint16_t cpi) {}

// clang-format off
const pointing_device_driver_t pointing_device_driver = {
    .init       = pointing_device_driver_init,
    .get_report = pointing_device_driver_get_report,
    .get_cpi    = pointing_device_driver_get_cpi,
    .set_cpi    = pointing_device_driver_set_cpi
};
// clang-format on
#endif