Glue code for exposing the native stuff

Author: jue89

index.js

@@ -0,0 +1,53 @@
+'use strict';
+
+const jsonGate = require( 'json-gate' );
+const pigpio = require('./build/Release/pigpio.node');
+
+const optSchema = jsonGate.createSchema( {
+	type: 'object',
+	additionalProperties: false,
+	required: true,
+	properties: {
+		pinTx: { type: 'integer', required: true, minimum: 0, maximum: 53 },
+		pinEn: { type: 'integer', required: true, minimum: 0, maximum: 53 },
+		invTx: { type: 'boolean', default: false },
+		invEn: { type: 'boolean', default: false }
+	}
+} );
+
+class DMX {
+
+	constructor( opt ) {
+
+		// Process options
+		optSchema.validate( opt );
+
+		// Init pins
+		// The init method of the native module will make sure only one instance is created successfully
+		pigpio.init( opt.pinTx, opt.pinEn, opt.invTx, opt.invEn );
+
+	}
+
+	transmit( data ) { return new Promise( ( resolve ) => {
+
+		// Make sure data is a buffer and has the right size
+		if( ! ( data instanceof Buffer ) ) throw new Error( "data must be a Buffer" );
+		if( data.length < 1 ) throw new Error( "data must have at least one element" );
+		if( data.length > 512 ) throw new Error( "Maximum size of data is 512" );
+
+		// Transmit buffer to driver
+		pigpio.transmit( data, resolve );
+
+	} ); }
+
+	close() {
+
+		pigpio.close();
+
+	}
+
+}
+
+module.exports = function( opt ) {
+	return new DMX( opt );
+}

package.json

@@ -14,6 +14,7 @@
   "license": "MIT",
   "gypfile": true,
   "dependencies": {
+    "json-gate": "^0.8.23",
     "nan": "^2.6.2"
   }
 }