qmk_firmware/tmk_core/protocol/pjrc/usb_mouse.c

/* USB Mouse Plus Debug Channel Example for Teensy USB Development Board
 * http://www.pjrc.com/teensy/usb_mouse.html
 * Copyright (c) 2009 PJRC.COM, LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <avr/interrupt.h>
#include <util/delay.h>
#include "usb_mouse.h"
#include "print.h"
#include "debug.h"

uint8_t usb_mouse_protocol = 1;

int8_t usb_mouse_send(int8_t x, int8_t y, int8_t wheel_v, int8_t wheel_h, uint8_t buttons) {
    uint8_t intr_state, timeout;

    if (!usb_configured()) return -1;
    if (x == -128) x = -127;
    if (y == -128) y = -127;
    if (wheel_v == -128) wheel_v = -127;
    if (wheel_h == -128) wheel_h = -127;
    intr_state = SREG;
    cli();
    UENUM   = MOUSE_ENDPOINT;
    timeout = UDFNUML + 50;
    while (1) {
        // are we ready to transmit?
        if (UEINTX & (1 << RWAL)) break;
        SREG = intr_state;
        // has the USB gone offline?
        if (!usb_configured()) return -1;
        // have we waited too long?
        if (UDFNUML == timeout) return -1;
        // get ready to try checking again
        intr_state = SREG;
        cli();
        UENUM = MOUSE_ENDPOINT;
    }
    UEDATX = buttons;
    UEDATX = x;
    UEDATX = y;
    if (usb_mouse_protocol) {
        UEDATX = wheel_v;
        UEDATX = wheel_h;
    }

    UEINTX = 0x3A;
    SREG   = intr_state;
    return 0;
}

void usb_mouse_print(int8_t x, int8_t y, int8_t wheel_v, int8_t wheel_h, uint8_t buttons) {
    if (!debug_mouse) return;
    print("usb_mouse[btn|x y v h]: ");
    phex(buttons);
    print("|");
    phex(x);
    print(" ");
    phex(y);
    print(" ");
    phex(wheel_v);
    print(" ");
    phex(wheel_h);
    print("\n");
}