Question

我有一个不会使用SERIAL或HID设备通信的USB设备。它处于DFU模式。我怎样才能开始检测它？我阅读了很多文章并查看了一些例子，但它们对我没有帮助。

据我所知，我应该使用IOKit.usb库吗？如果有人告诉我如何能够检测到这个设备，那将是很棒的:(

Answer 1

感谢您的回答，我建立了自己的解决方案：

class DFUDevice: NSObject {
    let vendorId = 0x0483
    let productId = 0xdf11

    static let sharedInstance = DFUDevice()

    private func reloadMonitor(iterator:io_iterator_t) {
        repeat {
            let nextService = IOIteratorNext(iterator)
            guard nextService != 0 else { break }
            IOObjectRelease(nextService)

        } while (true)
    }

    func connected(iterator:io_iterator_t) {
        self.reloadMonitor(iterator: iterator)
    }

    func disconnected(iterator:io_iterator_t) {
        self.reloadMonitor(iterator: iterator)
    }

    func initUsb() {
        var matchedIterator:io_iterator_t = 0
        var removalIterator:io_iterator_t = 0
        let notifyPort:IONotificationPortRef = IONotificationPortCreate(kIOMasterPortDefault)
        IONotificationPortSetDispatchQueue(notifyPort, DispatchQueue(label: "IODetector"))

        let matchingDict = IOServiceMatching(kIOUSBDeviceClassName)
            as NSMutableDictionary
        matchingDict[kUSBVendorID] = NSNumber(value: self.vendorId)
        matchingDict[kUSBProductID] = NSNumber(value: self.productId)

        let matchingCallback:IOServiceMatchingCallback = { (userData, iterator) in
            let this = Unmanaged<DFUDevice>
                .fromOpaque(userData!).takeUnretainedValue()
            this.connected(iterator: iterator)
        }

        let removalCallback: IOServiceMatchingCallback = {
            (userData, iterator) in
            let this = Unmanaged<DFUDevice>
                .fromOpaque(userData!).takeUnretainedValue()
            this.disconnected(iterator: iterator)
        };

        let selfPtr = Unmanaged.passUnretained(self).toOpaque()

        IOServiceAddMatchingNotification(notifyPort, kIOFirstMatchNotification, matchingDict, matchingCallback, selfPtr, &matchedIterator)
        IOServiceAddMatchingNotification(notifyPort, kIOTerminatedNotification, matchingDict, removalCallback, selfPtr, &removalIterator)

        if matchedIterator != 0 {
            self.connected(iterator: matchedIterator)
            matchedIterator = 0
        }

        if removalIterator != 0 {
            self.reloadMonitor(iterator: removalIterator)
            removalIterator = 0
        }

        self.reloadMonitor(iterator: matchedIterator)
        self.reloadMonitor(iterator: removalIterator)

        RunLoop.current.run();
    }
}

运行它：

let DFUDeviceDaemon = Thread(target: DFUDevice.sharedInstance, selector:#selector(DFUDevice.initUsb), object: nil)
            DFUDeviceDaemon.start()

使用VID和PID检测USB设备的示例

1 个答案: