Custom USB Host driver

20 June 2017

Universal Serial Bus (USB) is a fast and flexible interface that allows different peripherals to be connected to a host computer via single, standardized socket. It offers plug and play capabilities including hot swap functionality and was designed to be used with wide range of devices starting from standard peripherals like keyboards, mice and printers, ending with specialized devices. Mentioned flexibility and functionality (causing huge popularity among consumers and wide range of hardware manufacturers) led our customer to order dedicated USB Host driver for his custom platform.

Features:

USB Host driver for dedicated ASIC controller capable to manage and communicate with custom devices of CDC class (custom protocol over CDC).

ASIC controller by Atmel based on ARM9 architecture
USB Host controller compliant with Open HCI specification 1.0a
Stack of USB drivers correctly handling attaching of any USB device
Testing environment including custom USB Device driver of CDC class
Suite of documents including marketing and technical specifications

Example screens:

Application layer

Test applications – separate applications (one on USB Host side and second on USB Device side) that provide testing environment of USB Host drivers stack

Drivers layer

Interface Driver – driver tailoring interface of USB Host Driver to the requirements of application layer
USB Host Driver – driver responsible for performing enumeration and high-level communication with attached device
USB Host Controller Driver – driver for USB Host Controller hardware offering devices attachment / removal detection, status management and low-level communication
CDC Custom Device, USB Device Driver, USB Device Controller Driver – stack of USB Device drivers that handle enumeration process and low- and high-level communication. Those drivers were provided by the customer, but were adapted to comply with testing environment.

Hardware layer

USB Host Controller – part of ASIC microcontroller offering USB Host connectivity in compliance with Open HCI specification
USB Device Controller – part of evaluation board microcontroller offering USB Device connectivity