USB Manager <a name="EN-US_TOPIC_0000001124094823"></a>

base/usb/usb_manager
├── interfaces                  # APIs
│   ├── innerkits                  # Internal APIs
│   └── kits                       # External APIs
├── sa_profile                  # SA profile
└── services                    # Services
│   ├── native                     # Native APIs
│   └── zidl                       # zidl APIs
└── test                        # Test cases
└── utils                       # Utilities

// Import the USB API package.
import usb from '@ohos.usb';
// Obtain the USB device list.
var deviceList = usb.getDevices();

// device name
var deviceName = deviceList[0].name;
// Request for permission to operate a specified device.
usb.requestRight(deviceName).then(hasRight => {
	console.info("usb device request right result: " + hasRight);
}).catch(error => {
	console.info("usb device request right failed : " + error);
});

// Open the USB device, and obtain the device pipe for data transfer.
var pipe = usb.connectDevice(deviceList[0]);
// Claim the USB interface.
usb.claimInterface(pipe, interface, true); // Among the input arguments, interface refers to the one to be operated on the USB device.

// Read data. Select the corresponding RX endpoint (endpoint.direction == 0x80) from deviceList for data transfer. The data data to be transferred is encapsulated in dataUint8Array.
usb.bulkTransfer(pipe, inEndpoint, dataUint8Array, 15000).then(dataLength => {
if (dataLength >= 0) {
	console.info("usb readData result Length : " + dataLength);
	var resultStr = this.ab2str(dataUint8Array); // Convert uint8 data into a string.
	console.info("usb readData buffer : " + resultStr);
} else {
	console.info("usb readData failed : " + dataLength);
}
}).catch(error => {
console.info("usb readData error : " + JSON.stringify(error));
});
// Send data. Select the corresponding TX endpoint (endpoint.direction == 0) from deviceList for data transfer. 
usb.bulkTransfer(this.pip, this.outEndpoint, dataUint8Array, 15000).then(dataLength => {
	if (dataLength >= 0) {
		console.info("usb writeData result write length : " + dataLength);
	} else {
		console.info("writeData failed");
	}
}).catch(error => {
	console.info("usb writeData error : " + JSON.stringify(error));
});

usb.releaseInterface(pipe, interface);
usb.closePipe(pipe);

usb.setCurrentFunctions(funType).then(data => {
	console.info("usb setCurrentFunctions : " + data);
}).catch(error => {
	console.info("usb setCurrentFunctions error : " + error);
});