Add node.js libusb GenericHID test script.

diff --git a/Demos/Device/ClassDriver/GenericHID/HostTestApp/test_generic_hid_libusb.js b/Demos/Device/ClassDriver/GenericHID/HostTestApp/test_generic_hid_libusb.js
new file mode 100755 (executable)
index 0000000..ab29cdd
--- /dev/null
+++ b/Demos/Device/ClassDriver/GenericHID/HostTestApp/test_generic_hid_libusb.js
@@ -0,0 +1,143 @@
+#!/usr/bin/env node
+
+//             LUFA Library
+//     Copyright (C) Dean Camera, 2013.
+//
+//  dean [at] fourwalledcubicle [dot] com
+//           www.lufa-lib.org
+
+// LUFA Generic HID device demo host test script. This script will send a
+// continuous stream of generic reports to the device, to show a variable LED
+// pattern on the target board. Send and received report data is printed to
+// the terminal.
+//
+// You have to install the usb and async modules prior to executing this script:
+// apt-get install libusb-1.0-0-dev
+// npm install usb async sprintf
+
+var usb = require('usb');
+var async = require('async');
+var sprintf = require('sprintf');
+
+var deviceVid = 0x03EB;
+var devicePid = 0x204F;
+var reportLength = 8;
+
+function getAndInitHidDeviceAndInterface()
+{
+    device = usb.findByIds(deviceVid, devicePid);
+    if (!device) {
+        console.log('No device found');
+        process.exit(1);
+    }
+    device.open();
+
+    var hidInterface = device.interface(0);
+    if (hidInterface.isKernelDriverActive()) {
+        hidInterface.detachKernelDriver();
+    }
+    hidInterface.claim();
+
+    async.series([
+        function(callback) {
+            setConfiguration(0, function(error, data) {
+                callback();
+            });
+        }
+    ]);
+
+    return {hidDevice:device, hidInterface:hidInterface};
+}
+
+function read(hidInterface, callback)
+{
+    endpoint = hidInterface.endpoints[0];
+    endpoint.transfer(reportLength, function(error, data) {
+        if (error) {
+            console.log(error)
+        } else {
+            console.log("Received LED Pattern:", data.slice(0, 4));
+        }
+        callback();
+    });
+}
+
+function write(hidDevice, message, callback)
+{
+    hidDevice.controlTransfer(    // Send a Set Report control request
+        parseInt('00100001', 2),  // bmRequestType (constant for this control request)
+        0x09,                     // bmRequest (constant for this control request)
+        0x0809,                   // wValue (MSB is report type, LSB is report number)
+        0,                        // wIndex (interface number)
+        message,                  // message to be sent
+        function(error, data) {   // callback to be executed upon finishing the transfer
+            console.log("Sent LED Pattern:", message.slice(1, 5))
+            callback();
+        }
+    );
+}
+
+function setConfiguration(configurationNumber, callback)
+{
+    device.controlTransfer(                 // Send a Set Configuration control request
+        parseInt('00000000', 2),            // bmRequestType
+        0x09,                               // bmRequest
+        0,                                  // wValue (Configuration value)
+        0,                                  // wIndex
+        new Buffer(0),                      // message to be sent
+        callback                            // callback to be executed upon finishing the transfer
+    );
+}
+
+// @TODO: Fix this function because apparently it doesn't work for some reason.
+function getStringDescriptor(stringId, languageId, callback)
+{
+    var STRING_DESCRIPTOR_TYPE = 0x03;
+    var wValue = (STRING_DESCRIPTOR_TYPE << 8) | stringId;
+
+    device.controlTransfer(       // Send a Get Descriptor control request
+        parseInt('10000000', 2),  // bmRequestType
+        0x06,                     // bmRequest
+        wValue,                   // wValue
+        languageId,               // wIndex
+        64,                       // response length
+        callback                  // callback to be executed upon finishing the transfer
+    );
+}
+
+function setNextPattern()
+{
+    var pattern = [
+        hidInterface.interface,
+        (p >> 3) & 1,
+        (p >> 2) & 1,
+        (p >> 1) & 1,
+        (p >> 0) & 1
+    ];
+
+    async.series([
+        function(callback) {
+            write(hidDevice, new Buffer(pattern), callback);
+        },
+        function(callback) {
+            read(hidInterface, callback);
+        },
+        function(callback) {
+            p = (p + 1) % 16
+            setTimeout(setNextPattern, 200);
+            callback();
+        }]);
+}
+
+var hidDeviceAndInterface = getAndInitHidDeviceAndInterface();
+var hidDevice = hidDeviceAndInterface.hidDevice
+var hidInterface = hidDeviceAndInterface.hidInterface;
+
+console.log(sprintf("Connected to device 0x%04X/0x%04X - %s [%s]",
+            hidDevice.deviceDescriptor.idVendor,
+            hidDevice.deviceDescriptor.idProduct,
+            hidDevice.deviceDescriptor.iProduct,
+            hidDevice.deviceDescriptor.iManufacturer));
+
+p = 0
+setNextPattern();