protocol/pjrc/usb_mouse.c

   1 /* USB Mouse Plus Debug Channel Example for Teensy USB Development Board
   2  * http://www.pjrc.com/teensy/usb_mouse.html
   3  * Copyright (c) 2009 PJRC.COM, LLC
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21  * THE SOFTWARE.
  22  */
  23
  24 #include <avr/interrupt.h>
  25 #include <util/delay.h>
  26 #include "usb_mouse.h"
  27 #include "print.h"
  28 #include "debug.h"
  29
  30
  31 uint8_t usb_mouse_protocol=1;
  32
  33
  34 int8_t usb_mouse_send(int8_t x, int8_t y, int8_t wheel_v, int8_t wheel_h, uint8_t buttons)
  35 {
  36         uint8_t intr_state, timeout;
  37
  38         if (!usb_configured()) return -1;
  39         if (x == -128) x = -127;
  40         if (y == -128) y = -127;
  41         if (wheel_v == -128) wheel_v = -127;
  42         if (wheel_h == -128) wheel_h = -127;
  43         intr_state = SREG;
  44         cli();
  45         UENUM = MOUSE_ENDPOINT;
  46         timeout = UDFNUML + 50;
  47         while (1) {
  48                 // are we ready to transmit?
  49                 if (UEINTX & (1<<RWAL)) break;
  50                 SREG = intr_state;
  51                 // has the USB gone offline?
  52                 if (!usb_configured()) return -1;
  53                 // have we waited too long?
  54                 if (UDFNUML == timeout) return -1;
  55                 // get ready to try checking again
  56                 intr_state = SREG;
  57                 cli();
  58                 UENUM = MOUSE_ENDPOINT;
  59         }
  60         UEDATX = buttons;
  61         UEDATX = x;
  62         UEDATX = y;
  63         if (usb_mouse_protocol) {
  64             UEDATX = wheel_v;
  65             UEDATX = wheel_h;
  66         }
  67
  68         UEINTX = 0x3A;
  69         SREG = intr_state;
  70         return 0;
  71 }
  72
  73 void usb_mouse_print(int8_t x, int8_t y, int8_t wheel_v, int8_t wheel_h, uint8_t buttons) {
  74     if (!debug_mouse) return;
  75     print("usb_mouse[btn|x y v h]: ");
  76     phex(buttons); print("|");
  77     phex(x); print(" ");
  78     phex(y); print(" ");
  79     phex(wheel_v); print(" ");
  80     phex(wheel_h); print("\n");
  81 }