Microchip ATSAMD20G15 Manual

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Atmel Microcontrollers

AT09339: USB Host Interface (UHI) for Mass

Storage Class (MSC)

APPLICATION NOTE

Introduction

USB Host Interface (UHI) for Mass Storage Class (MSC) provides an

interface for the configuration and management of USB MSC host.

The outline of this documentation is as follows:

•API Overview

•Quick Start Guide for USB Host Mass-Storage Module (UHI MSC)

•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-42344B-USB-Host-Interface-UHI-for-Mass-Storage-Class-MSC_AT09339_Application Note-12/2015

Table of Contents

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

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

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

2.1. Variable and Type Definitions....................................................................................................... 5

2.1.1. Type uhi_msc_scsi_callback_t...................................................................................... 5

2.2. Structure Definitions..................................................................................................................... 5

2.2.1. Struct uhi_msc_lun_t..................................................................................................... 5

2.3. Macro Definitions..........................................................................................................................5

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

2.4. Function Definitions......................................................................................................................5

2.4.1. Functions Required by UHC.......................................................................................... 5

2.4.2. UHI for Mass Storage Class.......................................................................................... 6

2.4.3. USB Host Mass Storage Interface for Control Access Module......................................8

2.5. Enumeration Definitions..............................................................................................................11

2.5.1. Enum lun_status_t....................................................................................................... 11

3. Quick Start Guide for USB Host Mass-Storage Module (UHI MSC)........................12

3.1. Basic Use Case..........................................................................................................................12

3.1.1. Setup Steps................................................................................................................. 12

3.1.2. Usage Steps................................................................................................................ 12

3.2. Advanced Use Cases.................................................................................................................13

3.3. Enable USB High Speed Support.............................................................................................. 13

3.3.1. Setup Steps................................................................................................................. 13

3.3.2. Usage Steps................................................................................................................ 13

3.4. Multiple Classes Support............................................................................................................13

3.4.1. Setup Steps................................................................................................................. 14

3.4.2. Usage Steps................................................................................................................ 14

3.5. Dual Roles Support.................................................................................................................... 14

3.5.1. Setup Steps................................................................................................................. 14

3.5.2. Usage Steps................................................................................................................ 14

4. Configuration File Examples....................................................................................16

4.1. conf_usb_host.h......................................................................................................................... 16

4.1.1. UHI MSC Single...........................................................................................................16

4.1.2. UHI MSC Multiple (Composite)....................................................................................17

4.2. conf_clock.h................................................................................................................................18

4.2.1. AT32UC3A0, AT32UC3A1, and AT32UC3B Devices (USBB)..................................... 18

4.2.2. AT32UC3A3 and AT32UC3A4 Devices (USBB with High Speed Support)................. 18

4.2.3. AT32UC3C, ATUCXXD, ATUCXXL3U, and ATUCXXL4U Devices (USBC)................19

4.2.4. SAM3X and SAM3A Devices (UOTGHS: USB OTG High Speed)..............................20

4.3. conf_clocks.h..............................................................................................................................21

4.3.1. SAM D21 Devices (USB).............................................................................................21

4.4. conf_board.h...............................................................................................................................24

Atmel AT09339: USB Host Interface (UHI) for Mass Storage Class (MSC) [APPLICATION NOTE]

Atmel-42344B-USB-Host-Interface-UHI-for-Mass-Storage-Class-MSC_AT09339_Application Note-12/2015

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	ATSAMD20G15

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