USB Light HID控制与Node.JS和节点-usb-闪存只？

Question

我有一个Delcom USB灯--想想构建灯(http://www.delcomproducts.com/products_USBLMP.asp)，我正试着从node.js控制它(运行在Ubuntu上，如果有什么不同的话)

我正在使用node-usb (https://github.com/schakko/node-usb)，我可以连接并认领设备。我甚至可以让它“闪光”(就像你第一次插入它时一样)，但我不能让它保持亮起，更不用说改变颜色了。

var usb_driver = require("../usb.js"), 
    assert = require('assert');

// setup our vars
var lightVID = 0x0fc5
var lightPID = 0xb080

// Search for ledLight
var usb = usb_driver.create()

var theLight_devices = usb.find_by_vid_and_pid(lightVID, lightPID);
assert.ok((theLight_devices.length >= 1));
console.log("Total lights found: " + theLight_devices.length);  

// get the light
var theLight = theLight_devices[0];

var theLightInterfaces = theLight.getInterfaces();
assert.ok((theLightInterfaces.length >= 1));
console.log("The Light contains interfaces: " + theLightInterfaces.length);

var theLightInterface = theLightInterfaces[0];
console.log("Claiming the LIGHT interface for further actions")
theLightInterface.detachKernelDriver();
//theLightInterface.claim()

console.log(theLightInterface.claim());

// controlTransfer(mixed read|write, _bmRequestTyc8, _bRequest, _wValue, _wIndex, func, timeout);
theLight.controlTransfer(new Buffer(10), 0x88, 0xc8, 0x0635, 0x04, function() {     console.log("LED toggled") }, 0);

当你运行这个程序时，它告诉我有一个设备，它声称它，它甚至闪烁，但它就是不会停留。

对下一步该去哪里有什么想法吗？

这会不会与Node.js关闭和“闪存”重新控制USB端口有关系？

Answer 1

下面是一些更新后的代码：

var theLightInterface = theLightInterfaces[0]
console.log("Claiming the LIGHT interface for further actions " + theLightInterface)

for(var inter in theLightInterface){
    console.log("Name: "+ inter)
    console.log("Value: "+ theLightInterface[inter])
}
console.log("Is Active: "+ theLightInterface.isKernelDriverActive() )
console.log("Release Kernel: "+ theLightInterface.detachKernelDriver() )
console.log("Claim Interface: "+ theLightInterface.claim() )

theLight.controlTransfer(new Buffer(0), 0x12, 0xc8, 0x04, 101, function() { console.log("LED toggled") }, 1000)

结果是：

Is Active: 1
Release Kernel: undefined
Claim Interface: undefined

在设置了0x12和0xc8的情况下，它确实会使指示灯闪烁/闪烁-但我不认为我可以控制USB驱动程序