Created
January 23, 2017 16:34
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Simple joystick implementation with timeout for puck.js
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| pinMode( D13, 'input_pullup' ); // up | |
| pinMode( D14, 'input_pullup' ); // right | |
| pinMode( D15, 'input_pullup' ); // left | |
| pinMode( D16, 'input_pullup' ); // down | |
| let LEFT = 1; | |
| let RIGHT = 2; | |
| let ROT = 3; | |
| let DOWN = 4; | |
| let TIMEOUT = 60000; | |
| var connecting = false; | |
| var device = false; | |
| var timer = false; | |
| var characteristic = false; | |
| function disconnect() { | |
| if( device ) { | |
| device.disconnect(); | |
| device = false; | |
| } | |
| LED3.reset(); | |
| if( timer ) { | |
| clearTimeout( timer ); | |
| } | |
| connecting = false; | |
| } | |
| function refreshTimer() { | |
| if( timer ) { | |
| clearTimeout( timer ); | |
| } | |
| timer = setTimeout( disconnect, TIMEOUT ); | |
| } | |
| function connect() { | |
| if( device ) { | |
| refreshTimer(); | |
| return Promise.resolve( characteristic ); | |
| } | |
| else if( ! connecting ) { | |
| connecting = true; | |
| analogWrite(LED3, 0.02); | |
| return NRF.requestDevice({filters:[{services:['FFE0']}]}).then(dev=>{ | |
| console.log( "connecting " + dev.name); | |
| return dev.gatt.connect(); | |
| }).then(con=>{ | |
| device = con; | |
| console.log( "connected" ); | |
| return con.getPrimaryService(0xFFE0); | |
| }).then(ser=>{ | |
| console.log( "service found"); | |
| return ser.getCharacteristic(0xFFE1); | |
| }).then(cha=>{ | |
| console.log("characteristic found"); | |
| characteristic = cha; | |
| connecting = false; | |
| refreshTimer(); | |
| return cha; | |
| }).catch(err=>{ | |
| console.log("error", err); | |
| disconnect(); | |
| digitalPulse(LED1,1,200); | |
| return Promise.reject(err); | |
| }); | |
| } | |
| else { | |
| return Promise.reject("connecting"); | |
| } | |
| } | |
| function send( b ) { | |
| connect().then(cha=>{ | |
| cha.writeValue( b ); | |
| }).catch(err=>{ | |
| console.log("could not send" ); | |
| }); | |
| } | |
| setWatch(()=>{ send( ROT ); }, D13, { repeat: true, edge: 'rising', debounce: 20 }); | |
| setWatch(()=>{ send( RIGHT ); }, D14, { repeat: true, edge: 'rising', debounce: 20 }); | |
| setWatch(()=>{ send( LEFT ); }, D15, { repeat: true, edge: 'rising', debounce: 20 }); | |
| setWatch(()=>{ send( DOWN ); }, D16, { repeat: true, edge: 'rising', debounce: 20 }); |
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