Merge pull request #70 from amperka/i2c-hub

add i2c_hub module
amperka · Aug 27, 2018 · ff0a367 · ff0a367
2 parents e6bb6a5 + 45096b7
commit ff0a367
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/modules/@amperka/i2c-hub.js b/modules/@amperka/i2c-hub.js
@@ -0,0 +1,24 @@
+function TroykaI2CHub(opts) {
+  opts = opts || {}
+  var _channel = 0;
+  var _address = opts.address || 0x70;
+  var _i2c = opts.i2c || PrimaryI2C;
+  var _enableMask = 0x08;
+
+  this.setBusChannel = function(channel) {
+    if ((channel < 0) || (channel >= 8)) {
+      return;
+    }
+    _channel = channel;
+    _i2c.writeTo(_address, _channel | _enableMask);
+  };
+
+  this.getBusChannel = function() {
+    return _channel;
+  };
+  this.setBusChannel(0);
+}
+
+exports.connect = function(opts) {
+  return new TroykaI2CHub(opts);
+};