File content as of revision 0:9f5a70453c7c:

/* mbed USBJoystick Library
 * Copyright (c) 2012, v01:  Initial version, WH,
 *                           Modified USBMouse code ARM Limited.
 *                           (c) 2010-2011 mbed.org, MIT License
 *               2016, v02:  Updated USBDevice Lib, Added waitForConnect, Updated 32 bits button 
 *
 * 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, inclumosig 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, INCLUmosiG 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 "stdint.h"
#include "USBJoystick.h"

bool USBJoystick::update(int16_t x, int16_t y, int16_t rx, int16_t ry) {

   _x = x;
   _y = y;   
   _rx = rx;
   _ry = ry;

   return update();
}
 
bool USBJoystick::update() {
   HID_REPORT report;

   // Fill the report according to the Joystick Descriptor
   report.data[0] = _x & 0xff;
   report.data[1] = (_x >> 8) & 0xff;
   report.data[2] = _y & 0xff;
   report.data[3] = (_y >> 8) & 0xff;
   report.data[4] = _rx & 0xff;
   report.data[5] = (_rx >> 8) & 0xff;
   report.data[6] = _ry & 0xff;
   report.data[7] = (_ry >> 8) & 0xff;
   report.length = 8;

   return send(&report);
}

bool USBJoystick::move(int16_t x, int16_t y, int16_t rx, int16_t ry) {
   _x = x;
   _y = y;
   _rx = rx;
   _ry = ry;
   return update();
}

void USBJoystick::_init() {
   _x = 0x0000;
   _y = 0x0000;
   _rx = 0x0000;
   _ry = 0x0000;
}


uint8_t * USBJoystick::reportDesc() {    
         static uint8_t reportDescriptor[] = {
            // value in () is the number of bytes.  These bytes follow the comma, least significant byte first
            // see USBHID_Types.h for more info
             USAGE_PAGE(1), 0x01,           // Generic Desktop                 
             USAGE(1), 0x04,                // Usage (Joystick)
             COLLECTION(1), 0x01,           // Application
             
// 6 Axes of Joystick
               USAGE_PAGE(1), 0x01,            // Generic Desktop
               USAGE(1), 0x01,                 // Usage (Pointer)
               COLLECTION(1), 0x00,            // Physical
                 USAGE(1), 0x30,                 // X
                 USAGE(1), 0x31,                 // Y
                 USAGE(1), 0x33,                 // RX
                 USAGE(1), 0x34,                 // RY
                 LOGICAL_MINIMUM(2), 0x00, 0x80, // -32768 (using 2's complement)
                 LOGICAL_MAXIMUM(2), 0xff, 0x7f, // 32767 (0x7fff, least significant byte first)
                 REPORT_SIZE(1), 0x10,  // REPORT_SIZE describes the number of bits in this element (16, in this case)
                 REPORT_COUNT(1), 0x04,
                 INPUT(1), 0x02,                 // Data, Variable, Absolute                
               END_COLLECTION(0),
             END_COLLECTION(0)
      };

      reportLength = sizeof(reportDescriptor);
      return reportDescriptor;
}