Renesas X 600 Series Manuale utente

APPLICATION NOTE

R01AN0513EJ0110 Rev.1.10 Page 1 of 55

Aug 10, 2011

Renesas USB Device

USB Host Mass Storage Class Driver (HMSC)

Introduction

This document is a manual describing use of the USB host mass storage class driver with Renesas USB Device.

Target Device

RX62N Group, R8A66597

This application note also applies to other microcontrollers in the RX 600 Series that have the same USB module as

the RX62N Group microcontrollers. When using this code in an end product or other application, its operation must be

tested and evaluated thoroughly.

Contents

1. Overview ...........................................................................................................................................2

2. Device Class Driver (HDCD).............................................................................................................4

3. USB Mass Storage Class Driver (HMSCD) ....................................................................................12

4. Host Control Driver Interface(HCI) Functions .................................................................................21

5. Device Driver Interface(DDI) Functions ..........................................................................................26

6. File System Interface (FSI) .............................................................................................................31

7. Sample Device Driver (HMSDD).....................................................................................................34

8. Sample Application Program (APL) ................................................................................................42

9. Including Resources in µITRON and Non-OS Versions .................................................................50

10. Limitations.......................................................................................................................................54

R01AN0513EJ0110

Rev.1.10

Aug 10, 2011

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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Aug 10, 2011

1. Overview

1.1 Overview

This document is a manual describing use of the USB host mass storage class driver (HMSC) and Sample driver with

Renesas USB Device.

1.2 Functions and Features

The USB host mass storage class driver comprises a USB mass storage class Bulk-Only Transport (BOT) protocol.

When combined with a file system and storage device driver, it enables communication with a BOT-compatible USB

storage device.

1.3 Related Documents

[1] USB Revision 2.0 Specification

[2] USB Mass Storage Class Specification Overview Revision 1.1

[3] USB Mass Storage Class Bulk-Only Transport Revision 1.0 [http://www.usb.org/developers/docs/]

[4] RX62N Group, RX621 Group User’s Manual: Hardware (Document No.R01UH0033EJ)

[5] R8A66597 Datasheet (Document No. REJ03F0229)

[6] Renesas USB Device USB Basic Firmware Application note (Document No.R01AN0512EJ)

[7] RX600 Series USB Host Mass Storage Class Driver Installation Guide (Document No R01AN0523EJ)

Renesas Electronics Website

[http:// www.renesas.com/]

USB Devices Page

[http://www.renesas.com/prod/usb/]

1.4 Terms and Abbreviations

USB: Universal Serial Bus

USB-BASIC-F/W: USB basic firmware for Renesas USB Device

Hardware: Renesas USB Device

HEW High-performance Embedded Workshop

RX62N-RSK Renesas Starter Kit + for RX62N

non-OS USB Basic firmware for OS less system

µITRON USB Basic firmware for µITRON system

HCD: Host control driver of Renesas USB Device (USB-BASIC-F/W)

MGR: Peripheral device state manager of HCD

HUBCD: Sample USB hub class driver

HMSCD: USB host mass storage class driver

HMSDD: Sample host mass storage device driver

HDCD: Host device class driver (HMSDD + HMSCD)

MSDCD: Mass storage device class driver (HDCD)

BOT: USB mass storage class bulk only transport

APL: User application program

FSL: FAT file system library

TFAT: FAT File System Software for Microcontrollers (M3S-TFAT-Tiny-RX)

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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Task : Processing unit

Scheduler Macro : Macro for calling the scheduler function (non-OS only)

SW1/SW2/SW3 : User switches on the RX62N-RSK (Caution 1)

****(): Function call

****(capital letter) command: Storage device control command

(Caution 1) When RX62N-RSK used in conjunction with the R8A66597, SW1 is allocated to the port used by the

interruption. Therefore please do not uses SW1.

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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2. Device Class Driver (HDCD)

2.1 Basic Functions

The term HDCD refers collectively to HMSDD (host mass storage device driver) and HMSCD (USB host mass storage

class driver). Its main functions are as follows.

1. Activating HMSCD

2. Verifying connected devices

3. Checking drive information

4. Mounting drives

5. Accessing USB mass storage devices

2.2 Functions and Features

HDCD runs in uITRON as a task of the application program (APL). HDCD comprises three layers: wrapper layer for

FSL (FSI functions), HMSDD, and HMSCD. The APL accesses the USB storage device via FSL, HMSDD, HMSCD,

and HCD.

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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2.3 Software Configuration

Figure 2.1 shows the configuration of HDCD, and table 2.1 lists the modules.

User Application (APL)

File System Library (FSL)

File System Interface (FSI)

Mass Storage Device Driver (HMSDD)

Device Driver Interface (DDI)

HCD Interface (HCI)

Media Driver USB Host Control Driver (HCD)

Media USB Host Controller (Hardware)

Mass

Storage

Class Driver

(HMSCD)

Device

Class

Driver

(HDCD)

MGR / HUB

(USB manager)

(HUB driver)

Figure 2.1 Software Configuration Diagram

Table 2.1 Modules

Module Description

APL Calls FSL functions to implement storage functionality.

Created by the customer to match the system specifications.

FSL FAT file system with specifications defined by the user.

FSI FSL-HMSDD interface functions.

They should be modified to match FSL.

HMSDD Sample HMSDD.

It should be created (modified) by the customer to match the system specifications.

DDI HMSDD-HMSCD interface functions.

They should be modified to match HMSDD.

HMSCD The USB host mass storage class driver. It appends BOT protocol information to storage

commands and sends requests to HCD. It also manages the BOT sequence.

The storage commands should be added (modified) by the customer to match the system

specifications.

HCI HMSCD-HCD interface functions.

MGR/HUB Enumerates the connected devices and starts HMSCD. Also performs device state

management.

HCD USB host hardware control driver.

Media Driver Driver for non-USB storage devices.

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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PowerON_Reset_PC

H/W reset

InitializeMCU

Initializesection

Initializelibrary

Setstack

usbc_cstd_

MainTask

usbc_cstd_

MainTask

usb_hmsc_

MainInit

usb_hmsc_

MainLoop

usb_hmsc_MainInit

Initialize target

system

Initialize USB

function

Initialize scheduler

function

Set priority

Return

usb_hmsc_

MainLoop

Taskprocessing

flagset?

HCDtask

MGRtask

HUBtask

HMSCtask

Scheduler

Application

Return

Yes

For non-OS

For uITRON

usb_hmsc_

MainLoop

Return

Devicedriver

Application

Figure 2.2 Software Configuration Diagram

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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Aug 10, 2011

2.4 File Structure

2.4.1 Folder Structure

The folder structure in which the files are provided in HDCD is shown below.

+---WorkSpace

+---MSCFW For USB0

| +---HMSC Host MSC Driver

| +---include Host MSC header file

| +---TFAT FAT File System library

+---MSCCFW Common for USB0 and USB1

| +---include HMSC Common header file (common header file for MSCFW and MSC2FW)

+---MSC2FW For USB1 (Configuration is the same as MSCFW)

+---RI600_4 ITRON Folder (not included in non-OS version）

| +---config_Hmsc uITRON configuration file for HMSC "r_usb_RX62N.cfg"/"r_usb_RX630.cfg"

+---SmplMain

| +---APL Sample Application

<USB-BASIC-F/W is shown below.>

+---USB2STDFW For USB1

+---USBCSTDFW Common file for USB0 and USB1

| +---include Common header file (common header file for USB2STDFW and USBSTDFW)

+---USBSTDFW For USB0

+---HwResourceForUSB

* USB2STDFW folder and MSC2FW folder are used when there are two USB-IP.

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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Aug 10, 2011

2.4.2 File Structure

Table 2.2 File Structure

Folder Name File Name Description Note

APL r_usb_HMSC_apl.c Sample application Sample

MSCFW r_usb_HMSCfsi.c FSL interface functions Sample

MSCFW r_usb_hStorageDriver.c Device driver (HMSDD) Sample

MSCFW r_usb_HMSCddi.c HMSDD interface functions (DDI)

MSCFW r_usb_HMSCdriver.c

USB class driver (host mass storage

class)

MSCFW r_usb_HMSChci.c HCD interface functions (HCI)

include r_usb_cATAPIdefine.h MSDD common header file

include r_usb_cMSCdefine.h MSDCD common header file

include r_usb_hMSCdefine.h HMSCD header file

include r_usb_hMSCextern.h External reference header file

TFAT/lib_src r_tfat_drv_if.c TFAT interface functions Sample

* skip USB1

2.5 System Resources

2.5.1 System Resource Definitions when Running µITRON Version

The uITRON resources used by HDCD are listed below. They are defined in the r_usb_cKernelId.h header file.

Table 2.3 uITRON Resources

Name Description

usb_hstd_MainTask Application task

(Files can be manipulated by relevant task.)

Task_ID: USB_HSMP_TSK

Task priority: USB_HSMP_PRI

Task stack size: USB_TSK_STK

(0x0600)

Main_Task Main task

Task_ID: USB_SMP_TSK

Task priority: USB_SMP_PRI

USB_HMSCD_MBX2 HMSCD mailbox IDMailbox max. priority: 1

Waiting task queue: FIFO order

Message queue: FIFO order USB_HSMP_MBX Application mailbox ID

USB_HMSCD_MPL HMSCD memory pool ID

Fixed length memory pool block

count: 10

Block size: 64

Waiting task queue: FIFO order USB_HSMP_MPL Application memory pool ID

OS base timer Hardware timer 1 ms

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

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Aug 10, 2011

2.5.2 System Resource Definitions when Running Non-OS Version

The non-OS resources used by HDCD are listed below. They are defined in the r_usb_cKernelId.h header file.

Table 2.4 Non-OS Resources

Name Description

USB_HMSC_TSK

(usb_hmsc_Task) Mass Storage Class task

Task ID default value: USBC_TID_4

Task priority: USB_HMSC_PRI

(default value: USBC_PRI_3 = 3)

Scheduler registration task

USB_HMSCSMP_TSK

(usb_hmsc_SampleAplTask) Storage Device Driver Task

Task ID default value: USBC_TID_5

Task priority: USB_HSTRG_PRI

(default value: USBC_PRI_3)

USB_HMSCSMP_TSK

(usb_hmsc_SampleAplTask) APL Task

Task ID default value: USBC_TID_6

Task priority: USB_HMSCSMP_PRI

(default value: USBC_PRI_4)

USB_HMSCD_MBX2 HMSCD Mailbox IDMailbox ID

priority: 1

Waiting task queue: FIFO

order

Message queue: FIFO

order

USB_HSMP_MBX APL mailbox ID

Fixed length memory pool

ID USB_HMSCD_MPL

HMSCD memory pool ID

Fixed-length memory pool

block

count:USBC_BLKMAX:10

Waiting task queue: FIFO

order

USB_HSMP_MPL

APL memory pool ID

Renesas USB Device USB Host Mass Storage Class Driver(HMSC)

R01AN0513EJ0110 Rev.1.10 Page 10 of 55

Aug 10, 2011

2.6 Accessing USB Storage Devices

FSI converts sector numbers to logical block addresses and sector counts to transfer data sizes. From the drive number,

HMSDD determines if a USB storage device is being accessed. HMSCD converts drive numbers to unit numbers and

accesses USB storage devices via HCD according to the BOT protocol.

Figure 2.3 shows the UBS storage device access sequence.

APL FSL FSI HMSDD HMSCD HCD

read_sector() R_usb_hmsc_

StrgReadSector() R_usb_hmsc_

Read10()

Read sector

R_usb_hstd_

SetPipeRegistration()

transmission

usb_hmsc_Submitutr()

CBW

R_usb_hstd_

SetPipeRegistration()

recipition

usb_hmsc_Submitutr()

Data

R_usb_hstd_

SetPipeRegistration()

transmission

usb_hmsc_Submitutr()

CSW

returnreturnsector

data

write_sector() R_usb_hmsc_

StrgWriteSector() R_usb_hmsc_

Write10()

Write sector

R_usb_hstd_

SetPipeRegistration()

transmission

usb_hmsc_Submitutr()

CBW

R_usb_hstd_

SetPipeRegistration()

usb_hmsc_Submitutr()

Data

R_usb_hstd_

SetPipeRegistration()

transmission

usb_hmsc_Submitutr()

CSW

returnreturn

return return

transmission

ʻreadʼprocess R_tfat_disk_read()

ʻwriteʼprocess R_tfat_disk_write()

Figure 2.3 USB Storage Device Access Sequence

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