first commit

Software/NodeJS/libs/sensors/encoderDigitalSensor.js

@@ -0,0 +1,43 @@
+// TODO: call disable function on exit
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function EncoderDigitalSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+EncoderDigitalSensor.prototype = new DigitalSensor()
+
+EncoderDigitalSensor.prototype.read = function() {
+  var write = this.board.writeBytes(commands.encoderRead.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    this.board.readByte()
+    var bytes = this.board.readBytes()
+    if (bytes instanceof Buffer && bytes[1] != 255)
+      return [bytes[1], bytes[2]]
+    else
+      return false
+  } else {
+    return false
+  }
+}
+EncoderDigitalSensor.prototype.enable = function() {
+  var write = this.board.writeBytes(commands.encoderEn.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+EncoderDigitalSensor.prototype.disable = function() {
+  var write = this.board.writeBytes(commands.encoderDis.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+
+module.exports = EncoderDigitalSensor