Add Joystic driver

USBHost_t36.h

 };
 
 
+class JoystickController : public USBHIDInput {
+public:
+	JoystickController(USBHost &host) { USBHIDParser::driver_ready_for_hid_collection(this); }
+	bool    available() { return joystickEvent; }
+	void    joystickDataClear();
+	uint32_t getButtons() { return buttons; }
+	int	getAxis(uint32_t index) { return (index < 8) ? axis[index] : 0; }
+protected:
+	virtual bool claim_collection(Device_t *dev, uint32_t topusage);
+	virtual void hid_input_begin(uint32_t topusage, uint32_t type, int lgmin, int lgmax);
+	virtual void hid_input_data(uint32_t usage, int32_t value);
+	virtual void hid_input_end();
+	virtual void disconnect_collection(Device_t *dev);
+private:
+	Device_t *mydevice = NULL;
+	uint8_t collections_claimed = 0;
+	bool anychange = false;
+	volatile bool joystickEvent = false;
+	uint32_t buttons = 0;
+	int16_t axis[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+};
 
 #endif

examples/Mouse/Mouse.ino

 USBHIDParser hid4(myusb);
 USBHIDParser hid5(myusb);
 MouseController mouse1(myusb);
+JoystickController joystick1(myusb);
 
 void setup()
 {
 {
   myusb.Task();
   if(mouse1.available()) {
-    Serial.print("buttons = ");
+    Serial.print("Mouse: buttons = ");
     Serial.print(mouse1.getButtons());
     Serial.print(",  mouseX = ");
     Serial.print(mouse1.getMouseX());
     Serial.println();
     mouse1.mouseDataClear();
   }
+  if (joystick1.available()) {
+    Serial.print("Joystick: buttons = ");
+    Serial.print(joystick1.getButtons(), HEX);
+    Serial.print(", X = ");
+    Serial.print(joystick1.getAxis(0));
+    Serial.print(", Y = ");
+    Serial.print(joystick1.getAxis(1));
+
+    Serial.println();
+    joystick1.joystickDataClear();
+  }
 }
 
 

joystick.cpp

+/* USB EHCI Host for Teensy 3.6
+ * Copyright 2017 Paul Stoffregen (paul@pjrc.com)
+ *
+ * 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 <Arduino.h>
+#include "USBHost_t36.h"  // Read this header first for key info
+
+
+
+bool JoystickController::claim_collection(Device_t *dev, uint32_t topusage)
+{
+	// only claim Desktop/Joystick and Desktop/Gamepad
+	if (topusage != 0x10004 && topusage != 0x10005) return false;
+	// only claim from one physical device
+	if (mydevice != NULL && dev != mydevice) return false;
+	mydevice = dev;
+	collections_claimed++;
+	anychange = true; // always report values on first read
+	return true;
+}
+
+void JoystickController::disconnect_collection(Device_t *dev)
+{
+	if (--collections_claimed == 0) {
+		mydevice = NULL;
+	}
+}
+
+void JoystickController::hid_input_begin(uint32_t topusage, uint32_t type, int lgmin, int lgmax)
+{
+	// TODO: set up translation from logical min/max to consistent 16 bit scale
+}
+
+void JoystickController::hid_input_data(uint32_t usage, int32_t value)
+{
+	//Serial.printf("Joystick: usage=%X, value=%d\n", usage, value);
+	uint32_t usage_page = usage >> 16;
+	usage &= 0xFFFF;
+	if (usage_page == 9 && usage >= 1 && usage <= 32) {
+		uint32_t bit = 1 << (usage -1);
+		if (value == 0) {
+			if (buttons & bit) {
+				buttons &= ~bit;
+				anychange = true;
+			}
+		} else {
+			if (!(buttons & bit)) {
+				buttons |= bit;
+				anychange = true;
+			}
+		}
+	} else if (usage_page == 1 && usage >= 0x30 && usage <= 0x37) {
+		// TODO: need scaling of value to consistent API, 16 bit signed?
+		// TODO: many joysticks repeat slider usage.  Detect & map to axes?
+		uint32_t i = usage - 0x30;
+		if (axis[i] != value) {
+			axis[i] = value;
+			anychange = true;
+		}
+	}
+	// TODO: hat switch?
+}
+
+void JoystickController::hid_input_end()
+{
+	if (anychange) {
+		joystickEvent = true;
+	}
+}
+
+void JoystickController::joystickDataClear() {
+	joystickEvent = false;
+	anychange = false;
+}
+
+