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teensy-cores/teensy3/usb_mouse.c

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  1. /* Teensyduino Core Library

  2.  * http://www.pjrc.com/teensy/

  3.  * Copyright (c) 2013 PJRC.COM, LLC.

  4.  *

  5.  * Permission is hereby granted, free of charge, to any person obtaining

  6.  * a copy of this software and associated documentation files (the

  7.  * "Software"), to deal in the Software without restriction, including

  8.  * without limitation the rights to use, copy, modify, merge, publish,

  9.  * distribute, sublicense, and/or sell copies of the Software, and to

  10.  * permit persons to whom the Software is furnished to do so, subject to

  11.  * the following conditions:

  12.  *

  13.  * 1. The above copyright notice and this permission notice shall be 

  14.  * included in all copies or substantial portions of the Software.

  15.  *

  16.  * 2. If the Software is incorporated into a build system that allows 

  17.  * selection among a list of target devices, then similar target

  18.  * devices manufactured by PJRC.COM must be included in the list of

  19.  * target devices and selectable in the same manner.

  20.  *

  21.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

  22.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

  23.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

  24.  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

  25.  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

  26.  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

  27.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

  28.  * SOFTWARE.

  29.  */

  30. 

  31. #include "usb_dev.h"

  32. #include "usb_mouse.h"

  33. #include "core_pins.h" // for yield()

  34. #include "HardwareSerial.h"

  35. #include <string.h> // for memcpy()

  36. 

  37. #ifdef MOUSE_INTERFACE // defined by usb_dev.h -> usb_desc.h

  38. 

  39. // which buttons are currently pressed

  40. uint8_t usb_mouse_buttons_state=0;

  41. 

  42. //#define DEFAULT_XRES 640

  43. //#define DEFAULT_YRES 480

  44. 

  45. //#define DEFAULT_XRES 800

  46. //#define DEFAULT_YRES 600

  47. 

  48. //#define DEFAULT_XRES 1024

  49. //#define DEFAULT_YRES 768

  50. 

  51. //#define DEFAULT_XRES 1280

  52. //#define DEFAULT_YRES 720

  53. 

  54. //#define DEFAULT_XRES 1280

  55. //#define DEFAULT_YRES 800

  56. 

  57. #define DEFAULT_XRES 1366

  58. #define DEFAULT_YRES 768

  59. 

  60. //#define DEFAULT_XRES 1440

  61. //#define DEFAULT_YRES 900

  62. 

  63. //#define DEFAULT_XRES 1920

  64. //#define DEFAULT_YRES 1080

  65. 

  66. //#define DEFAULT_XRES 2560

  67. //#define DEFAULT_YRES 1440

  68. 

  69. //#define DEFAULT_XRES 2560

  70. //#define DEFAULT_YRES 1600

  71. 

  72. //#define DEFAULT_XRES 2880

  73. //#define DEFAULT_YRES 1800

  74. 

  75. //#define DEFAULT_XRES 3840

  76. //#define DEFAULT_YRES 2160

  77. 

  78. //#define DEFAULT_XRES 7680

  79. //#define DEFAULT_YRES 4320

  80. 

  81. 

  82. #define DEFAULT_XSCALE ((0x80000000ul+DEFAULT_XRES/2)/DEFAULT_XRES)

  83. #define DEFAULT_YSCALE ((0x80000000ul+DEFAULT_YRES/2)/DEFAULT_YRES)

  84. 

  85. static uint16_t usb_mouse_resolution_x=DEFAULT_XRES;

  86. static uint16_t usb_mouse_resolution_y=DEFAULT_YRES;

  87. static uint16_t usb_mouse_position_x=DEFAULT_XRES/2;

  88. static uint16_t usb_mouse_position_y=DEFAULT_YRES/2;

  89. static uint32_t usb_mouse_scale_x=DEFAULT_XSCALE;

  90. static uint32_t usb_mouse_scale_y=DEFAULT_YSCALE;

  91. static uint32_t usb_mouse_offset_x=DEFAULT_XSCALE/2-1;

  92. static uint32_t usb_mouse_offset_y=DEFAULT_YSCALE/2-1;

  93. 

  94. 

  95. // Set the mouse buttons.  To create a "click", 2 calls are needed,

  96. // one to push the button down and the second to release it

  97. int usb_mouse_buttons(uint8_t left, uint8_t middle, uint8_t right)

  98. {

  99.         uint8_t mask=0;

  100. 

  101.         if (left) mask |= 1;

  102.         if (middle) mask |= 4;

  103.         if (right) mask |= 2;

  104.         usb_mouse_buttons_state = mask;

  105.         return usb_mouse_move(0, 0, 0);

  106. }

  107. 

  108. 

  109. // Maximum number of transmit packets to queue so we don't starve other endpoints for memory

  110. #define TX_PACKET_LIMIT 3

  111. 

  112. static uint8_t transmit_previous_timeout=0;

  113. 

  114. // When the PC isn't listening, how long do we wait before discarding data?

  115. #define TX_TIMEOUT_MSEC 30

  116. 

  117. #if F_CPU == 96000000

  118.   #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 596)

  119. #elif F_CPU == 48000000

  120.   #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 428)

  121. #elif F_CPU == 24000000

  122.   #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 262)

  123. #endif

  124. 

  125. 

  126. // Move the mouse.  x, y and wheel are -127 to 127.  Use 0 for no movement.

  127. int usb_mouse_move(int8_t x, int8_t y, int8_t wheel)

  128. {

  129.         uint32_t wait_count=0, val32;

  130.         usb_packet_t *tx_packet;

  131. 	uint16_t newval;

  132. 

  133.         if (x == -128) x = -127;

  134.         if (y == -128) y = -127;

  135.         if (wheel == -128) wheel = -127;

  136. 	if (x > 0) {

  137. 		newval = usb_mouse_position_x + x;

  138. 		if (newval >= usb_mouse_resolution_x) newval = usb_mouse_resolution_x - 1;

  139. 		usb_mouse_position_x = newval;

  140. 	} else if (x < 0) {

  141. 		newval = usb_mouse_position_x + x;

  142. 		if (newval & 0x8000) newval = 0;

  143. 		usb_mouse_position_x = newval;

  144. 	}

  145. 	if (y > 0) {

  146. 		newval = usb_mouse_position_y + y;

  147. 		if (newval >= usb_mouse_resolution_y) newval = usb_mouse_resolution_y - 1;

  148. 		usb_mouse_position_y = newval;

  149. 	} else if (y < 0) {

  150. 		newval = usb_mouse_position_y + y;

  151. 		if (newval & 0x8000) newval = 0;

  152. 		usb_mouse_position_y = newval;

  153. 	}

  154.         while (1) {

  155.                 if (!usb_configuration) {

  156.                         return -1;

  157.                 }

  158.                 if (usb_tx_packet_count(MOUSE_ENDPOINT) < TX_PACKET_LIMIT) {

  159.                         tx_packet = usb_malloc();

  160.                         if (tx_packet) break;

  161.                 }

  162.                 if (++wait_count > TX_TIMEOUT || transmit_previous_timeout) {

  163.                         transmit_previous_timeout = 1;

  164.                         return -1;

  165.                 }

  166.                 yield();

  167.         }

  168. 	transmit_previous_timeout = 0;

  169. 	*(tx_packet->buf) = usb_mouse_buttons_state;

  170. 	val32 = usb_mouse_position_x * usb_mouse_scale_x + usb_mouse_offset_x;

  171. 	 //serial_print("move:");

  172. 	 //serial_phex16(usb_mouse_position_x);

  173. 	 //serial_print("->");

  174. 	 //serial_phex32(val32);

  175. 	*(tx_packet->buf + 1) = val32 >> 16;

  176. 	*(tx_packet->buf + 2) = val32 >> 24;

  177. 	val32 = usb_mouse_position_y * usb_mouse_scale_y + usb_mouse_offset_y;

  178. 	 //serial_print(",");

  179. 	 //serial_phex16(usb_mouse_position_y);

  180. 	 //serial_print("->");

  181. 	 //serial_phex32(val32);

  182. 	 //serial_print("\n");

  183. 	*(tx_packet->buf + 3) = val32 >> 16;

  184. 	*(tx_packet->buf + 4) = val32 >> 24;

  185. 	*(tx_packet->buf + 5) = wheel;

  186. 	tx_packet->len = 6;

  187. 	usb_tx(MOUSE_ENDPOINT, tx_packet);

  188.         return 0;

  189. }

  190. 

  191. int usb_mouse_position(uint16_t x, uint16_t y)

  192. {

  193. 	if (x >= usb_mouse_resolution_x) x = usb_mouse_resolution_x - 1;

  194. 	usb_mouse_position_x = x;

  195. 	if (y >= usb_mouse_resolution_y) y = usb_mouse_resolution_y - 1;

  196. 	usb_mouse_position_y = y;

  197. 	return usb_mouse_move(0, 0, 0);

  198. }

  199. 

  200. void usb_mouse_screen_size(uint16_t width, uint16_t height, uint8_t mac)

  201. {

  202. 	if (width < 128) width = 128;

  203. 	else if (width > 7680) width = 7680;

  204. 	if (height < 128) height = 128;

  205. 	else if (height > 7680) height = 7680;

  206. 	usb_mouse_resolution_x = width;

  207. 	usb_mouse_resolution_y = height;

  208. 	usb_mouse_position_x = width / 2;

  209. 	usb_mouse_position_y = height / 2;

  210. 	usb_mouse_scale_x = (0x80000000ul + (width >> 1)) / width;

  211. 	usb_mouse_scale_y = (0x80000000ul + (height >> 1)) / height;

  212. 	usb_mouse_offset_x = (usb_mouse_scale_x >> 1) - 1;

  213. 	usb_mouse_offset_y = (usb_mouse_scale_y >> 1) - 1;

  214. 	if (mac) {

  215. 		// ugly workaround for Mac's HID coordinate scaling:

  216. 		// http://lists.apple.com/archives/usb/2011/Jun/msg00032.html

  217. 		usb_mouse_offset_x += 161061273ul;

  218. 		usb_mouse_offset_y += 161061273ul;

  219. 		usb_mouse_scale_x = (1825361101ul + (width >> 1)) / width;

  220. 		usb_mouse_scale_y = (1825361101ul + (height >> 1)) / height;

  221. 	}

  222. }

  223. 

  224. 

  225. 

  226. #endif // MOUSE_INTERFACE