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Joystick.cpp
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Joystick.cpp
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/*
Joystick.cpp
Copyright (c) 2015, Matthew Heironimus (https://github.com/MHeironimus/ArduinoJoystickLibrary)
Modified 2016, Timon Orawski (to increase stick resolution)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "Joystick.h"
#if defined(_USING_HID)
#define JOYSTICK_REPORT_ID 0x03
#define JOYSTICK_STATE_SIZE 21
static const uint8_t _hidReportDescriptor[] PROGMEM = {
// Joystick
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x04, // USAGE (Joystick)
0xa1, 0x01, // COLLECTION (Application)
0x85, JOYSTICK_REPORT_ID, // REPORT_ID (3)
// 32 Buttons
0x05, 0x09, // USAGE_PAGE (Button)
0x19, 0x01, // USAGE_MINIMUM (Button 1)
0x29, 0x20, // USAGE_MAXIMUM (Button 32)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x75, 0x01, // REPORT_SIZE (1)
0x95, 0x20, // REPORT_COUNT (32)
0x55, 0x00, // UNIT_EXPONENT (0)
0x65, 0x00, // UNIT (None)
0x81, 0x02, // INPUT (Data,Var,Abs)
// 8 bit Throttle and Steering
0x05, 0x02, // USAGE_PAGE (Simulation Controls)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (1000)
0xA1, 0x00, // COLLECTION (Physical)
0x09, 0xBB, // USAGE (Throttle)
0x09, 0xBA, // USAGE (Steering)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x02, // INPUT (Data,Var,Abs)
0xc0, // END_COLLECTION
// Two Hat switches (8 Positions)
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x39, // USAGE (Hat switch)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x07, // LOGICAL_MAXIMUM (7)
0x35, 0x00, // PHYSICAL_MINIMUM (0)
0x46, 0x3B, 0x01, // PHYSICAL_MAXIMUM (315)
0x65, 0x14, // UNIT (Eng Rot:Angular Pos)
0x75, 0x04, // REPORT_SIZE (4)
0x95, 0x01, // REPORT_COUNT (1)
0x81, 0x02, // INPUT (Data,Var,Abs)
0x09, 0x39, // USAGE (Hat switch)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x07, // LOGICAL_MAXIMUM (7)
0x35, 0x00, // PHYSICAL_MINIMUM (0)
0x46, 0x3B, 0x01, // PHYSICAL_MAXIMUM (315)
0x65, 0x14, // UNIT (Eng Rot:Angular Pos)
0x75, 0x04, // REPORT_SIZE (4)
0x95, 0x01, // REPORT_COUNT (1)
0x81, 0x02, // INPUT (Data,Var,Abs)
// X, Y, and Z Axis (16 bit)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x26, 0xE8, 0x03, // LOGICAL_MAXIMUM (1000)
0x75, 0x10, // REPORT_SIZE (16)
0x09, 0x01, // USAGE (Pointer)
0xA1, 0x00, // COLLECTION (Physical)
0x09, 0x30, // USAGE (x)
0x09, 0x31, // USAGE (y)
0x09, 0x32, // USAGE (z)
0x09, 0x33, // USAGE (rx)
0x09, 0x34, // USAGE (ry)
0x09, 0x35, // USAGE (rz)
0x95, 0x06, // REPORT_COUNT (6)
0x81, 0x02, // INPUT (Data,Var,Abs)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
};
Joystick_::Joystick_()
{
// Setup HID report structure
static HIDSubDescriptor node(_hidReportDescriptor, sizeof(_hidReportDescriptor));
HID().AppendDescriptor(&node);
// Initalize State
xAxis = 0;
yAxis = 0;
zAxis = 0;
xAxisRotation = 0;
yAxisRotation = 0;
zAxisRotation = 0;
buttons = 0;
throttle = 0;
rudder = 0;
hatSwitch[0] = -1;
hatSwitch[1] = -1;
}
void Joystick_::begin(bool initAutoSendState)
{
autoSendState = initAutoSendState;
sendState();
}
void Joystick_::end()
{
}
void Joystick_::setButton(uint8_t button, uint8_t value)
{
if (value == 0)
{
releaseButton(button);
}
else
{
pressButton(button);
}
}
void Joystick_::pressButton(uint8_t button)
{
bitSet(buttons, button);
if (autoSendState) sendState();
}
void Joystick_::releaseButton(uint8_t button)
{
bitClear(buttons, button);
if (autoSendState) sendState();
}
void Joystick_::setThrottle(uint16_t value)
{
throttle = value;
if (autoSendState) sendState();
}
void Joystick_::setRudder(uint16_t value)
{
rudder = value;
if (autoSendState) sendState();
}
void Joystick_::setXAxis(int16_t value)
{
xAxis = value;
if (autoSendState) sendState();
}
void Joystick_::setYAxis(int16_t value)
{
yAxis = value;
if (autoSendState) sendState();
}
void Joystick_::setZAxis(int16_t value)
{
zAxis = value;
if (autoSendState) sendState();
}
void Joystick_::setXAxisRotation(int16_t value)
{
xAxisRotation = value;
if (autoSendState) sendState();
}
void Joystick_::setYAxisRotation(int16_t value)
{
yAxisRotation = value;
if (autoSendState) sendState();
}
void Joystick_::setZAxisRotation(int16_t value)
{
zAxisRotation = value;
if (autoSendState) sendState();
}
void Joystick_::setHatSwitch(int8_t hatSwitchIndex, int16_t value)
{
hatSwitch[hatSwitchIndex % 2] = value;
if (autoSendState) sendState();
}
void Joystick_::sendState()
{
uint8_t data[JOYSTICK_STATE_SIZE];
uint32_t buttonTmp = buttons;
// Split 32 bit button-state into 4 bytes
data[0] = buttonTmp & 0xFF;
buttonTmp >>= 8;
data[1] = buttonTmp & 0xFF;
buttonTmp >>= 8;
data[2] = buttonTmp & 0xFF;
buttonTmp >>= 8;
data[3] = buttonTmp & 0xFF;
data[4] = throttle;
data[5] = rudder;
// Calculate hat-switch values
uint8_t convertedHatSwitch[2];
for (int hatSwitchIndex = 0; hatSwitchIndex < 2; hatSwitchIndex++)
{
if (hatSwitch[hatSwitchIndex] < 0)
{
convertedHatSwitch[hatSwitchIndex] = 8;
}
else
{
convertedHatSwitch[hatSwitchIndex] = (hatSwitch[hatSwitchIndex] % 360) / 45;
}
}
// Pack hat-switch states into a single byte
data[6] = (convertedHatSwitch[1] << 4) | (B00001111 & convertedHatSwitch[0]);
data[7] = lowByte(xAxis);
data[8] = highByte(xAxis);
data[9] = lowByte(yAxis);
data[10] = highByte(yAxis);
data[11] = lowByte(zAxis);
data[12] = highByte(zAxis);
data[13] = lowByte(xAxisRotation);
data[14] = highByte(xAxisRotation);
data[15] = lowByte(yAxisRotation);
data[16] = highByte(yAxisRotation);
data[17] = lowByte(zAxisRotation);
data[18] = highByte(zAxisRotation);
// HID().SendReport(Report number, array of values in same order as HID descriptor, length)
HID().SendReport(JOYSTICK_REPORT_ID, data, JOYSTICK_STATE_SIZE);
}
Joystick_ Joystick;
#endif