Class: EvamUsbManagerDev¶

api/hardware/framework/dev/EvamUsbManagerDev.EvamUsbManagerDev

Usb manager class for the Evam platform, contains general USB device management APIs.

Implements¶

UsbManager

Constructors¶

constructor¶

new EvamUsbManagerDev(usb)

Parameters¶

Name	Type
`usb`	`USB`

Methods¶

getDeviceList¶

getDeviceList(): Promise<UsbDevice[]>

Gets the list of devices the application is allowed (authorized) to communicate with.

Returns¶

Promise<UsbDevice[]>

UsbDevice[] List of accessible devices

Implementation of¶

UsbManager.getDeviceList

hasPermission¶

hasPermission(device): Promise<boolean>

Checks if a specific device can be accessed from this application

Parameters¶

Name	Type	Description
`device`	`UsbDevice`	The target USB device

Returns¶

Promise<boolean>

boolean true if application is authorized, false otherwise

Implementation of¶

UsbManager.hasPermission

openDevice¶

openDevice(device): Promise<void>

Opens a specific device

Parameters¶

Name	Type	Description
`device`	`UsbDevice`	Device to be opened for communication

Returns¶

Promise<void>

Implementation of¶

UsbManager.openDevice

requestPermission¶

requestPermission(filters, callback): Promise<void>

Requests the permission to access a specific device selected from a list of filters. Will cause a system pop-up to be shown to the end user for the device selection.

Parameters¶

Name	Type	Description
`filters`	`UsbDeviceFilter`[]	List of filters for the USB device to be requested
`callback`	(`device`: `UsbDevice`, `message`: `string`) => `void`	Function to be run when the end user has granted permission to a device. Provides the device and a result message.

Returns¶

Promise<void>

Implementation of¶

UsbManager.requestPermission