USB Interface

USB common definitions (Driver_USB.h) More...

Content
	USB Device Interface
	Driver API for USB Device Peripheral (Driver_USBD.h)
	USB Host Interface
	Driver API for USB Host Peripheral (Driver_USBH.h)
	USB Speed
	USB Speed definitions.
	USB Endpoint Type
	USB Endpoint Type definitions.

Description

USB common definitions (Driver_USB.h)

The Universal Serial Bus (USB) implements a serial bus for data exchange. It is a host controlled, plug-and-play interface between a USB host and USB devices using a tiered star topology. In microcontroller (MCU) applications, the interface is often used to connect a device to a host for data exchange or control purposes.

• Wikipedia offers more information about the Universal Serial Bus.

• The USB Implementers Forum provides detailed documentation under www.usb.org.

  Block Diagram**

Typically only one USB Device is connected to a USB Host. If several USB devices must be connected to the same USB host, then the connection must be done via a USB hub.

Simplified USB Schema

USB API**

The following header files define the Application Programming Interface (API) for the USB interface:

• Driver_USB.h : Common definitions of the USBD and USBH interface
• Driver_USBD.h : Driver API for USB Device Peripheral
• Driver_USBH.h : Driver API for USB Host Peripheral

The driver implementation is a typical part of the Device Family Pack (DFP) that supports the peripherals of the microcontroller family.

Driver Functions**

The driver functions are published in the access struct as explained in Common Driver Functions

• ARM_DRIVER_USBD : access struct for USBD driver functions
• ARM_DRIVER_USBH : access struct for USBH driver functions