Merge pull request #362 from nxdefiant/master

Add Joystick app

apps.json

@@ -1535,5 +1535,17 @@
         "evaluate": true
       }
     ]
+  },
+  { "id": "hidjoystick",
+    "name": "Bluetooth Joystick",
+    "shortName": "Joystick",
+    "icon": "app.png",
+    "version":"0.01",
+    "description": "Emulates a 2 axis/5 button Joystick using the accelerometer as stick input and buttons 1-3, touch left as button 4 and touch right as button 5.",
+    "tags": "bluetooth",
+    "storage": [
+      {"name":"hidjoystick.app.js","url":"app.js"},
+      {"name":"hidjoystick.img","url":"app-icon.js","evaluate":true}
+    ]
   }
 ]

apps/hidjoystick/app-icon.js

@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwwhC/AH4ADhvd6AWVAAIYTCwQABC9JGDJCYX/R+7XYgEE7tACycAgczmAX/C/4X/C6kBiMQCyoABDB0N7vdAgIWCAAIXjxAAQCwkIC6OAC/4X/C/4XbgAXRCwgA/AH4ANA"))

apps/hidjoystick/app.js

@@ -0,0 +1,74 @@
+var storage = require('Storage');
+const settings = storage.readJSON('setting.json',1) || { HID: false };
+
+var sendInProgress = false; // Only send one message at a time, do not flood
+
+const sendHid = function (x, y, btn1, btn2, btn3, btn4, btn5, cb) {
+	try {
+		const buttons = (btn5<<4) | (btn4<<3) | (btn3<<2) | (btn2<<1) | (btn1<<0);
+		if (!sendInProgress) {
+			sendInProgress = true;
+			NRF.sendHIDReport([buttons, x, y], () => {
+				sendInProgress = false;
+				if (cb) cb();
+			});
+		}
+	} catch(e) {
+		print(e);
+	}
+};
+
+function drawApp() {
+	g.clear();
+	g.setFont("6x8",2);
+	g.setFontAlign(0,0);
+	g.drawString("Joystick", 120, 120);
+	const d = g.getWidth() - 18;
+
+	function c(a) {
+		return {
+			width: 8,
+			height: a.length,
+			bpp: 1,
+			buffer: (new Uint8Array(a)).buffer
+		};
+	}
+
+	g.drawImage(c([16,56,124,254,16,16,16,16]),d,40);
+	g.drawImage(c([16,16,16,16,254,124,56,16]),d,194);
+	g.drawImage(c([0,8,12,14,255,14,12,8]),d,116);
+}
+
+function update() {
+	const btn1 = BTN1.read();
+	const btn2 = BTN2.read();
+	const btn3 = BTN3.read();
+	const btn4 = BTN4.read();
+	const btn5 = BTN5.read();
+	const acc = Bangle.getAccel();
+	var x = acc.x*-127;
+	var y = acc.y*-127;
+
+	// check limits
+	if (x > 127) x = 127;
+	else if (x < -127) x = -127;
+	if (y > 127) y = 127;
+	else if (y < -127) y = -127;
+
+	sendHid(x & 0xff, y & 0xff, btn1, btn2, btn3, btn4, btn5);
+}
+
+if (settings.HID === "joy") {
+	drawApp();
+	setInterval(update, 100); // 10 Hz
+} else {
+	E.showPrompt("Enable HID?",{title:"HID disabled"}).then(function(enable) {
+		if (enable) {
+			settings.HID = "joy";
+			storage.write('setting.json', settings);
+			setTimeout(load, 1000, "hidjoystick.app.js");
+		} else {
+			setTimeout(load, 1000);
+		}
+	});
+}