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piifpiif
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first try (but needs windows plugin ...)
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3 files changed

+201
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‎ArduinoScratch.ino

Lines changed: 12 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1,18 +1,26 @@
11
#include <Arduino.h>
22

3+
bool ledState = LOW;
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bool buttonState = LOW;
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void setup(void) {
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pinMode(13, OUTPUT);
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digitalWrite(13, LOW);
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// TODO : bind raising interrupt on this digital input
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pinMode(12, INPUT);
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Serial.begin(115200);
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}
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void loop() {
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int input = Serial.read();
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if (input == '0') {
12-
digitalWrite(13, LOW);
13-
Serial.println("OFF");
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ledState = LOW;
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} else if (input == '1') {
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digitalWrite(13, HIGH);
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Serial.println("ON");
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ledState = HIGH;
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} else if (input == '?') {
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Serial.println(ledState ? "1" : "0");
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}
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digitalWrite(13, ledState);
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}

‎extension/arduino.extension.js

Lines changed: 187 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,187 @@
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// See http://llk.github.io/scratch-extension-docs/
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// + install http://cdn.scratch.mit.edu/scratchr2/static/__172524edbffb65446b8d280ce8bcec1a__//ext/ScratchDevicePlugin.msi
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var myExtension;
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new (function() {
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var ext = this;
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// Currently connected serial device. Undefined if nothing connected. First connected is used.
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// current state of arduino when connected
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var status = {
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led: null,
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buttonPressed: null
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};
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myExtension = {
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status: status,
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device: null
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}
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ext.getLed = function() {
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if (myExtension.device !== null && status.led !== null) {
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return status.led;
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} else {
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return "???";
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}
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};
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ext.ifLed = function(what) {
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if (myExtension.device !== null && status.led !== null) {
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return what === status.led;
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} else {
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return false;
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}
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};
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var ON = new Uint8Array(1), OFF = new Uint8Array(1);
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ON[0] = '1';
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OFF[0] = '0';
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ext.setLed = function(what) {
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if (myExtension.device === null) {
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return;
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}
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myExtension.device.send(what === "on" ? ON : OFF);
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};
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ext.onButton = function() {
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if (myExtension.device === null) {
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return false;;
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}
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if (status.buttonPressed === true) {
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status.buttonPressed = false;
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return true;
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} else {
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return false;
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}
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};
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// serial dialog methods
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function handleData(/*uint8=char ?*/ c) {
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if (c == '.') {
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// ping => ok
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clearWatchDog();
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} else if (c == '!') {
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status.buttonPressed = true;
68+
} else if (c == '0' || c == '1') {
69+
status.led = c;
70+
} else {
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console.Log("bad char '" + c + "' ?");
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}
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}
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// Extension API interactions
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// each time a device is connected, it's added to this list
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var potentialDevices = [];
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// callback on device connection
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ext._deviceConnected = function(dev) {
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// add it to list
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potentialDevices.push(dev);
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// and make it current one if none currently affected
84+
if (!myExtension.device) {
85+
tryNextDevice();
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}
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}
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var poller = null;
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var watchdog = null;
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function tryNextDevice() {
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// If potentialDevices is empty, device will be undefined.
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// That will get us back here next time a device is connected.
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myExtension.device = potentialDevices.shift();
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if (!myExtension.device) return;
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myExtension.device.open({ stopBits: 0, bitRate: 115200, ctsFlowControl: 0 });
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// register a callback for received data
100+
myExtension.device.set_receive_handler(function(data) {
101+
rawData = new Uint8Array(data);
102+
// for the moment, we handle received data byte per byte
103+
// later, will have to handle fixed len or length-data buffers
104+
for(i = 0; i < rawData.length; i++) {
105+
if (rawData[i] === '\n') {
106+
continue;
107+
}
108+
handleData(rawData[i]);
109+
}
110+
console.log('Received: ' + data.byteLength + " : " + data);
111+
});
112+
113+
var pingCmd = new Uint8Array(1);
114+
pingCmd[0] = '?';
115+
poller = setInterval(function() {
116+
myExtension.device.send(pingCmd.buffer);
117+
}, 100);
118+
watchdog = setTimeout(function() {
119+
// This device didn't get good data in time, so give up on it. Clean up and then move on.
120+
// If we get good data then we'll terminate this watchdog.
121+
clearInterval(poller);
122+
poller = null;
123+
myExtension.device.set_receive_handler(null);
124+
myExtension.device.close();
125+
myExtension.device = null;
126+
tryNextDevice();
127+
}, 500);
128+
}
129+
130+
// user may call this method when he verified that connected device is of good type
131+
function clearWatchDog() {
132+
if (watchdog) {
133+
clearTimeout(watchdog);
134+
watchdog = null;
135+
}
136+
}
137+
138+
// callback when a device is disconnected
139+
ext._deviceRemoved = function(dev) {
140+
if(myExtension.device != dev) return;
141+
if(poller) poller = clearInterval(poller);
142+
myExtension.device = null;
143+
// TODO : Should call ? tryNextDevice();
144+
};
145+
146+
// Cleanup function when the extension is unloaded
147+
ext._shutdown = function() {
148+
if(myExtension.device) myExtension.device.close();
149+
if(poller) poller = clearInterval(poller);
150+
myExtension.device = null;
151+
};
152+
153+
// Status reporting code
154+
// Use this to report missing hardware, plugin or unsupported browser
155+
// Value / status light Color / Meaning
156+
// 0 red error
157+
// 1 yellow not ready
158+
// 2 green ready
159+
ext._getStatus = function() {
160+
if(!myExtension.device) return {status: 1, msg: 'Arduino disconnected'};
161+
if(watchdog) return {status: 1, msg: 'Probing for Arduino'};
162+
return {status: 2, msg: 'Arduino connected'};
163+
}
164+
165+
// Block and block menu descriptions
166+
var descriptor = {
167+
// each block begins by a Op Code :
168+
// ' ' (space) Synchronous command
169+
// 'w' Asynchronous command
170+
// 'r' Synchronous reporter
171+
// 'R' Asynchronous reporter
172+
// 'h' Hat block (synchronous, returns boolean, true = run stack)
173+
// then, a description with arguments marked by %... : %n for number, %s for string, and %m.menuName for menu
174+
blocks: [
175+
['', 'set led %m.led', 'setLed', 'on'],
176+
['r', 'led state', 'getLed'],
177+
['r', 'if led is %m.led', 'ifLed', 'on'],
178+
['h', 'when button is pressed', 'onButton'],
179+
],
180+
menus: {
181+
led: ['on', 'off']
182+
}
183+
};
184+
185+
// Register the extension
186+
ScratchExtensions.register('My first extension', descriptor, ext, {type: 'serial'});
187+
})();

‎run.sh

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,2 @@
1+
HERE=$(cd $(dirname $0) ; /bin/pwd)
2+
$HERE/../arddude/etc/ad.sh $1 avrdude -patmega328p -carduino -P/dev/ttyACM0 -b115200 -D -Uflash:w:$HERE/target/Uno/ArduinoScratch.hex:i

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