# UsbDDK
<!--Kit: Driver Development Kit-->
<!--Subsystem: Driver-->
<!--Owner: @lixinsheng2-->
<!--Designer: @w00373942-->
<!--Tester: @dong-dongzhen-->
<!--Adviser: @w_Machine_cc-->

## Overview

Provides USB DDK APIs to open and close USB interfaces, perform non-isochronous and isochronous data transfer over USB pipes, and implement control transfer and interrupt transfer, etc.

**System capability**: SystemCapability.Driver.USB.Extension

**Since**: 10
## Files

| Name| Description|
| -- | -- |
| [usb_ddk_api.h](capi-usb-ddk-api-h.md) | Declares the USB DDK APIs used by the USB host to access USB devices.|
| [usb_ddk_types.h](capi-usb-ddk-types-h.md) | Provides the enumerated variables, structures, and macros used in USB DDK APIs.|