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Atmel Microcontrollers

AT09333: USB Host Interface (UHI) for

Communication Class Device (CDC)

APPLICATION NOTE

Introduction

USB Host Interface (UHI) for Communication Class Device (CDC) provides

an interface for the configuration and management of USB CDC serial host.

The outline of this documentation is as follows:

•API Overview

•Quick Start Guide for USB Host Communication Device Class Module

(UHI CDC)

•Configuration File Examples

For more details for Atmel® Software Framework (ASF) USB Host Stack,

refer to following application note:

•AVR4950: ASF - USB Host Stack

Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015

Table of Contents

Introduction......................................................................................................................1

1. Software License....................................................................................................... 4

2. API Overview.............................................................................................................5

2.1. Macro Definitions..........................................................................................................................5

2.1.1. Interface with USB Host Core (UHC).............................................................................5

2.2. Function Definitions......................................................................................................................5

2.2.1. Functions Required by UHC.......................................................................................... 5

2.2.2. UHI for Communication Device Class........................................................................... 6

3. Quick Start Guide for USB Host Communication Device Class Module (UHI CDC)

.................................................................................................................................10

3.1. Basic Use Case..........................................................................................................................10

3.1.1. Setup Steps................................................................................................................. 10

3.1.2. Usage Steps................................................................................................................ 10

3.2. Advanced Use Cases................................................................................................................. 11

3.3. Enable USB High Speed Support.............................................................................................. 12

3.3.1. Setup Steps................................................................................................................. 12

3.3.2. Usage Steps................................................................................................................ 12

3.4. Multiple Classes Support............................................................................................................12

3.4.1. Setup Steps................................................................................................................. 12

3.4.2. Usage Steps................................................................................................................ 12

3.5. Dual Roles Support.................................................................................................................... 12

3.5.1. Setup Steps................................................................................................................. 13

3.5.2. Usage Steps................................................................................................................ 13

4. Configuration File Examples....................................................................................15

4.1. conf_usb_host.h......................................................................................................................... 15

4.1.1. UHI CDC Single...........................................................................................................15

4.1.2. UHI CDC Multiple (Composite)....................................................................................16

4.2. conf_clock.h................................................................................................................................17

4.2.1. AT32UC3A0, AT32UC3A1, AT32UC3B Devices (USBB)............................................ 17

4.2.2. AT32UC3A3 and AT32UC3A4 Devices (USBB with High Speed Support)................. 17

4.2.3. AT32UC3C, ATUCXXD, ATUCXXL3U, ATUCXXL4U Devices (USBC).......................18

4.2.4. SAM3X and SAM3A Devices (UOTGHS: USB OTG High Speed)..............................19

4.3. conf_clocks.h..............................................................................................................................20

4.3.1. SAM D21 Devices (USB).............................................................................................20

4.4. conf_board.h...............................................................................................................................23

4.4.1. AT32UC3A0, AT32UC3A1, AT32UC3B Devices (USBB)............................................ 23

4.4.2. AT32UC3A3 and AT32UC3A4 Devices (USBB with High Speed Support)................. 23

4.4.3. AT32UC3C, ATUCXXD, ATUCXXL3U, ATUCXXL4U Devices (USBC).......................23

4.4.4. SAM3X and SAM3A Devices (UOTGHS: USB OTG High Speed)..............................24

4.4.5. SAM D21 Devices (USB).............................................................................................25

Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION

NOTE]

Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015

5. USB Host Basic Setup.............................................................................................26

5.1. USB Host User Configuration.....................................................................................................26

5.2. USB Host User Callback............................................................................................................ 26

5.3. USB Host Setup Steps............................................................................................................... 27

5.3.1. USB Host Controller (UHC) - Prerequisites................................................................. 27

5.3.2. USB Host Controller (UHC) - Example Code.............................................................. 27

5.3.3. USB Device Controller (UHC) - Workflow....................................................................28

5.4. conf_clock.h Examples...............................................................................................................28

6. Document Revision History..................................................................................... 30

Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION

NOTE]

Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015

Produktspecifikationer

Varumärke:	Microchip
Kategori:	Inte kategoriserad
Modell:	ATSAMD20J16

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