APPLICATION NOTE
Renesas Synergy™ Project
USBX™ Mass Storage Class (Host)
1.
R30AN0239EU0103
Rev.1.03
Feb 12, 2016
Introduction
This project illustrates the use of a USB mass storage class host to access data on a common USB stick drive. The
application also includes key elements to demonstrate how they work together in a typical design, including: ThreadX®
RTOS, USBX™ host stack, USBX™ mass storage class driver, USBX™ host controller driver for the Renesas Synergy
Platform, FileX®, and a sample application that reads and writes files on the drive.
2.
Connect to the Board
This section describes how to connect the board to power, the J-Link debugger to the PC, and the board to the USB
stick.
1.
Refer to the Quick Start Guide for PE-HMI1, DK-S7G2, DK-S3A7, or SK-S7G2 for setting up the power
connection and the J-Link debugger connection from your PC to the JTAG connector on the target board.
2.
Connect a USB stick formatted FAT32 to the board’s USB host connector.
Import the Project into e2 studio
3.
Refer to the "Synergy Project Import Guide" (r11an0023eu0100_synergy_ssp.pdf) for instructions on importing the
project into e2 studio and building/running the project.
When debugging, use the “USBX_Mass_Storage_Host Debug” configuration.
4.
Application Features
This section describes the key features of the USBX™ Mass Storage Class (host) demo application and the steps needed
to run the application.
The demonstration application illustrates USB connectivity through these two functions:
•
•
The board mounts the USB stick as a FileX® storage media.
The application opens a file on the stick, increments the first character in the file, and writes it back to the
storage media.
R30AN0239EU0103 Rev.1.03
Feb 12, 2016
Page 1 of 3
Renesas SynergyTM Project
USBXTM Mass Storage Class (Host)
To run the demonstration application:
1.
Click Resume
twice.
2.
Insert a USB flash stick into the USB host receptacle on the board.
3.
Observe that the LED on the USB stick lights. This indicates that the USB flash stick has been powered and
the file system has been mounted.
4.
Observe that LED1 on the board begins to flash. This indicates that the first character in the file has been
incremented.
5.
Remove the USB stick from the board and plug it into a PC. Open the file counter.txt on the root of the USB
stick and note the first character in the file.
6.
Repeat steps 2-5 and observe the first character being incremented each time.
7.
Click Terminate
to close the debugger.
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Feb 12, 2016
Page 2 of 3
Renesas SynergyTM Project
USBXTM Mass Storage Class (Host)
Website and Support
Support
https://synergygallery.renesas.com/support
Technical Contact Details
America:
https://renesas.zendesk.com/anonymous_requests/new
Europe:
http://www.renesas.eu/support/index.jsp
Japan:
http://japan.renesas.com/contact/index.jsp
All trademarks and registered trademarks are the property of their respective owners.
R30AN0239EU0103 Rev.1.03
Feb 12, 2016
Page 3 of 3
Revision History
Rev.
1.00
1.01
1.02
1.03
Date
December 11,
2015
January 7, 2016
January 22,
2016
February 12,
2016
Description
Page
Summary
Initial Version
-
Changed from Template to Import
Connected to boards before import.
-
PE-HMI1 and SK-S7G2 code samples updated.
A-1
General Precautions in the Handling of Microprocessing Unit and Microcontroller Unit Products
The following usage notes are applicable to all Microprocessing unit and Microcontroller unit products from Renesas.
For detailed usage notes on the products covered by this document, refer to the relevant sections of the document as
well as any technical updates that have been issued for the products.
1. Handling of Unused Pins
Handle unused pins in accordance with the directions given under Handling of Unused Pins in the
manual.
The input pins of CMOS products are generally in the high-impedance state. In operation with
an unused pin in the open-circuit state, extra electromagnetic noise is induced in the vicinity of
LSI, an associated shoot-through current flows internally, and malfunctions occur due to the
false recognition of the pin state as an input signal become possible. Unused pins should be
handled as described under Handling of Unused Pins in the manual.
2. Processing at Power-on
The state of the product is undefined at the moment when power is supplied.
The states of internal circuits in the LSI are indeterminate and the states of register settings and
pins are undefined at the moment when power is supplied.
In a finished product where the reset signal is applied to the external reset pin, the states of
pins are not guaranteed from the moment when power is supplied until the reset process is
completed.
In a similar way, the states of pins in a product that is reset by an on-chip power-on reset
function are not guaranteed from the moment when power is supplied until the power reaches
the level at which resetting has been specified.
3. Prohibition of Access to Reserved Addresses
Access to reserved addresses is prohibited.
The reserved addresses are provided for the possible future expansion of functions. Do not
access these addresses; the correct operation of LSI is not guaranteed if they are accessed.
4. Clock Signals
After applying a reset, only release the reset line after the operating clock signal has become
stable. When switching the clock signal during program execution, wait until the target clock signal
has stabilized.
When the clock signal is generated with an external resonator (or from an external oscillator)
during a reset, ensure that the reset line is only released after full stabilization of the clock
signal. Moreover, when switching to a clock signal produced with an external resonator (or by
an external oscillator) while program execution is in progress, wait until the target clock signal is
stable.
5. Differences between Products
Before changing from one product to another, i.e. to a product with a different part number, confirm
that the change will not lead to problems.
The characteristics of Microprocessing unit or Microcontroller unit products in the same group
but having a different part number may differ in terms of the internal memory capacity, layout
pattern, and other factors, which can affect the ranges of electrical characteristics, such as
characteristic values, operating margins, immunity to noise, and amount of radiated noise.
When changing to a product with a different part number, implement a system-evaluation test
for the given product.
Notice
1.
Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of semiconductor products and application examples. You are fully responsible for
the incorporation of these circuits, software, and information in the design of your equipment. Renesas Electronics assumes no responsibility for any losses incurred by you or third parties arising from the use
of these circuits, software, or information.
2.
Renesas Electronics has used reasonable care in preparing the information included in this document, but Renesas Electronics does not warrant that such information is error free. Renesas Electronics
assumes no liability whatsoever for any damages incurred by you resulting from errors in or omissions from the information included herein.
3.
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technical information described in this document. No license, express, implied or otherwise, is granted hereby under any patents, copyrights or other intellectual property rights of Renesas Electronics or
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third parties arising from such alteration, modification, copy or otherwise misappropriation of Renesas Electronics product.
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Renesas Electronics products are classified according to the following two quality grades: "Standard" and "High Quality". The recommended applications for each Renesas Electronics product depends on
the product's quality grade, as indicated below.
"Standard": Computers; office equipment; communications equipment; test and measurement equipment; audio and visual equipment; home electronic appliances; machine tools; personal electronic
equipment; and industrial robots etc.
"High Quality": Transportation equipment (automobiles, trains, ships, etc.); traffic control systems; anti-disaster systems; anti-crime systems; and safety equipment etc.
Renesas Electronics products are neither intended nor authorized for use in products or systems that may pose a direct threat to human life or bodily injury (artificial life support devices or systems, surgical
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6.
You should use the Renesas Electronics products described in this document within the range specified by Renesas Electronics, especially with respect to the maximum rating, operating supply voltage
range, movement power voltage range, heat radiation characteristics, installation and other product characteristics. Renesas Electronics shall have no liability for malfunctions or damages arising out of the
use of Renesas Electronics products beyond such specified ranges.
7.
Although Renesas Electronics endeavors to improve the quality and reliability of its products, semiconductor products have specific characteristics such as the occurrence of failure at a certain rate and
malfunctions under certain use conditions. Further, Renesas Electronics products are not subject to radiation resistance design. Please be sure to implement safety measures to guard them against the
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8.
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9.
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contents and conditions set forth in this document, Renesas Electronics assumes no responsibility for any losses incurred by you or third parties as a result of unauthorized use of Renesas Electronics
products.
11. This document may not be reproduced or duplicated in any form, in whole or in part, without prior written consent of Renesas Electronics.
12. Please contact a Renesas Electronics sales office if you have any questions regarding the information contained in this document or Renesas Electronics products, or if you have any other inquiries.
(Note 1)
"Renesas Electronics" as used in this document means Renesas Electronics Corporation and also includes its majority-owned subsidiaries.
(Note 2)
"Renesas Electronics product(s)" means any product developed or manufactured by or for Renesas Electronics.
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