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我已經實現了檢測USB設備的功能。它的工作原理，現在我需要發送/讀取數據。USB設備發送/接收數據
我開始翻閱大量的obj-c來源和蘋果文檔中只找到一個好article，描述我們怎麼可以把包我們的USB設備：
IOReturn WriteToDevice(IOUSBDeviceInterface **dev, UInt16 deviceAddress,
UInt16 length, UInt8 writeBuffer[])
{
IOUSBDevRequest request;
request.bmRequestType = USBmakebmRequestType(kUSBOut, kUSBVendor,
kUSBDevice);
request.bRequest = 0xa0;
request.wValue = deviceAddress;
request.wIndex = 0;
request.wLength = length;
request.pData = writeBuffer;
return (*dev)->DeviceRequest(dev, &request);
}
但我沒有找到一個如何使用Swift創建和發送數據。在Swift的結構是這樣的：
public struct IOUSBDevRequest {
public var bmRequestType: UInt8
public var bRequest: UInt8
public var wValue: UInt16
public var wIndex: UInt16
public var wLength: UInt16
public var pData: UnsafeMutableRawPointer!
public var wLenDone: UInt32
public init()
public init(bmRequestType: UInt8, bRequest: UInt8, wValue: UInt16, wIndex: UInt16, wLength: UInt16, pData: UnsafeMutableRawPointer!, wLenDone: UInt32)
}
我想不出什麼參數是pData，zwLenDone。
這是我需要發送數據：
{
'direction':'in',
'recipient':'device',
'requestType': 'standard',
'request': 6,
'value': 0x300,
'index': 0,
'length': 255
}
下一個問題是：我如何可以接收數據。我知道答案在本文中，但我無法將其轉換爲Swift。
這是我可以在Swift 3轉換。我的班級檢測USB設備，讓他的配置：
class DFUDevice: NSObject {
let vendorId = 0x0483
let productId = 0xdf11
static let sharedInstance = DFUDevice()
var deviceName:String = ""
private func deviceAdded(iterator: io_iterator_t) {
var plugInInterfacePtrPtr: UnsafeMutablePointer<UnsafeMutablePointer<IOCFPlugInInterface>?>?
var deviceInterfacePtrPtr: UnsafeMutablePointer<UnsafeMutablePointer<IOUSBDeviceInterface>?>?
var configPtr:IOUSBConfigurationDescriptorPtr?
var score: Int32 = 0
while case let usbDevice = IOIteratorNext(iterator), usbDevice != 0 {
// io_name_t imports to swift as a tuple (Int8, ..., Int8) 128 ints
// although in device_types.h it's defined:
// typedef char io_name_t[128];
var deviceNameCString: [CChar] = [CChar](repeating: 0, count: 128)
let deviceNameResult = IORegistryEntryGetName(usbDevice, &deviceNameCString)
if(deviceNameResult != kIOReturnSuccess) {
print("Error getting device name")
}
self.deviceName = String.init(cString: &deviceNameCString)
print("usb Device Name: \(deviceName)")
// Get plugInInterface for current USB device
let plugInInterfaceResult = IOCreatePlugInInterfaceForService(
usbDevice,
kIOUSBDeviceUserClientTypeID,
kIOCFPlugInInterfaceID,
&plugInInterfacePtrPtr,
&score)
// dereference pointer for the plug in interface
guard plugInInterfaceResult == kIOReturnSuccess,
let plugInInterface = plugInInterfacePtrPtr?.pointee?.pointee else {
print("Unable to get Plug-In Interface")
continue
}
// use plug in interface to get a device interface
let deviceInterfaceResult = withUnsafeMutablePointer(to: &deviceInterfacePtrPtr) {
$0.withMemoryRebound(to: Optional<LPVOID>.self, capacity: 1) {
plugInInterface.QueryInterface(
plugInInterfacePtrPtr,
CFUUIDGetUUIDBytes(kIOUSBDeviceInterfaceID),
$0)
}
}
// dereference pointer for the device interface
guard deviceInterfaceResult == kIOReturnSuccess,
let deviceInterface = deviceInterfacePtrPtr?.pointee?.pointee else {
print("Unable to get Device Interface")
continue
}
var ret = deviceInterface.USBDeviceOpen(deviceInterfacePtrPtr)
if (ret == kIOReturnSuccess)
{
// set first configuration as active
ret = deviceInterface.GetConfigurationDescriptorPtr(deviceInterfacePtrPtr, 0, &configPtr)
if (ret != kIOReturnSuccess)
{
print("Could not set active configuration (error: %x)\n", ret);
continue
}
guard let config = configPtr?.pointee else {
continue
}
if config.bLength > 0 {
//HERE I NEED SEND DATA
} else {
print("ConfigurationDescriptor not valid")
}
print(config.bLength)
}
else if (ret == kIOReturnExclusiveAccess)
{
// this is not a problem as we can still do some things
}
else
{
print("Could not open device (error: %x)\n", ret)
continue
}
IOObjectRelease(usbDevice)
}
}
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.deviceAdded(iterator: iterator)
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)
self.deviceAdded(iterator: matchedIterator)
self.deviceAdded(iterator: removalIterator)
RunLoop.current.run()
}
}
我這樣稱呼它：
let DFUDeviceDaemon = Thread(target: DFUDevice.sharedInstance, selector:#selector(DFUDevice.initUsb), object: nil)
DFUDeviceDaemon.start()
ORSSerialPort，由安德魯·馬德森寫的，寫的是在這兩個Objective-C和斯威夫特一個優秀的庫（不知道哪個版本）。即使這不是你想要的，源代碼可能會幫助你設置正確的方向。 https://github.com/armadsen/ORSSerialPort –
我已經創建了[USBDeviceSwift]（https://github.com/Arti3DPlayer/USBDeviceSwift）庫，以便於使用'IOKit.usb'和'IOKit.hid'工作。 – Arti