Silicon Laboratories USB-MSD-RD User Manual

USB-MSD-RD

USB MASS STORAGE DEVICE REFERENCE DESIGN KIT USER’S GUIDE

1. Kit Contents

 CF, SD, MMC Memory Expansion Board (AB5)
 256 MB SD Card
 Straight DB9 serial cable (RS-232 cable)
 Quick-start Guide
 Reference Design Kit CD-ROM containing the following items:

 USB Mass Storage Device Reference Design Programmer's Guide (AN282), and associated software (AN282SW.zip)
 Keil Software 8051 Development Tools (evaluation assembler, 2 kB limited compiler, and linker)
 All C8051F340 and USB MSD related documentation in PDF format

2. Requirements

The USB MSD Reference Design Kit has been designed for use with a C8051F340DK Development Kit. The
development kit can be purchased separately from Silicon Laboratories (www.silabs.com). The following are the
requirements to use this Reference Design Kit as described in this User's Guide.

 C8051F340DK Development Kit (contents shown below):

 C8051F340-TB Target Board
 USB Debug Adapter
 6' USB Cable
 AC to DC Power Adapter

 PC with the following features:

 Operating system: Windows 2000/XP/Server2003
 Available ports: One serial port (RS232) and one USB port

Note: A full version of the Keil tool chain is required in order to modify and recompile the code provided with this reference

design because the code size is greater than evaluation tool chain's code size limits. No tool chain is required for the
demonstration or for debugging because an object file (*.OMF) is provided with the reference design.

3. USB Mass Storage Device Reference Design Kit Overview

The USB Mass Storage Device (MSD) Reference Design Kit includes the AB5 Expansion Board (shown in
Figure 1) that can be connected directly to the expansion connector of a C8051F340-TB Target Board. The
connected setup with a SD memory card is shown in Figure 2. This hardware and the included 'F340 firmware fully
demonstrate how an application can benefit from implementing the USB MSD device class. The firmware is
described in Section “4. USB MSD RD Firmware”. Step-by-step demonstration instructions are provided in Section
“5. USB MSD Reference Design Kit Demonstration”. Detailed descriptions of the components and API functions
are included in “AN282: USB Mass Storage Device Reference Design Programmer's Guide". The board hardware
is described in sections 6, 7, and 8.

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USB-MSD-RD

Figure 1. CF, SD, MMC Memory Expansion Board (AB5)

Note: The C8051F340-TB Target Board is not included with the USB-MSD-RD Kit.

Figure 2. C8051F340-TB connected to AB5 Expansion Board with SD Card

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USB-MSD-RD

4. USB MSD RD Firmware

The USB MSD RD includes all the 'F340 firmware necessary to handle the following:

 USB enumeration and standard requests
 MSD class requests
 SCSI command set
 Media access - SD, MMC and CompactFlash card formats
 FAT16 file system support

Also included is an example application that can perform the following tasks:

 Present an interactive command shell via the UART
 Measure temperature using the on-chip temperature sensor and ADC
 Monitor the state of the two push-button switches on the target board
 Log the temperature and button state information to log files in the memory card

The USB MSD RD System Architecture shown in Figure 3 gives an overview of the various components that
constitute the USB MSD RD firmware. The code space usage chart in Figure 4 shows the amount of code space
used by the firmware components. Detailed descriptions of the components and API functions are included in
“AN282: USB Mass Storage Device Reference Design Programmer's Guide".

To implement your own application based on this USB MSD Reference Design, you can customize the blocks
labeled 'Application', 'Other HW Peripherals', and 'App. Specific Hardware' (all shown in blue in Figure 3). Source
code for all the other firmware blocks is also provided, but typically there is no need to customize these blocks.

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USB-MSD-RD

Components used only
for USB MSD Data Flow

USB MSD Data Flow

Windows Explorer or

Other Application

File system API serving
the Example App.

Shared media access
components

Example App. components
that can be customized

Example App. Data Flow

HyperTerminal

Driver Stack Driver Stack

USB Host Controller RS232 Serial Port

PC

USB Function

Temp. Sensor

Controller

Transceiver

ADC

UART

USB

Mass Storage

Device

Example

Application

External HW Peripherals

RS232

Push

Buttons

SCSI

File System

Sector Server

C8051F340 USB Mixed Signal MCU

Media Access

C8051F340-TB Target Board

Figure 3. USB MSD RD System Architecture

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SPI

Compact

Flash

Memory

Card

SD /

MMC

Memory

Card

AB5 Memory

Expansion Board

USB-MSD-RD

Available

Free Space

(39.1 kB)

62%

File System

Used

(23.9 kB)

38%

USB / MSD /

SCSI (3.9 kB)

6%

(5.9 kB)

9%

Sector Server

(1.1 kB)

2%

Example

Application

(5.1 kB)

8%

SD / MMC

Media Access

(2.1 kB)

3%

Compiler

Libraries /

Misc

(5.1 kB)

8%

CF Media

Access

(0.7 kB)

1%

Figure 4. USB MSD Firmware Code Space Usage on the C8051F340

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USB-MSD-RD

5. USB MSD Reference Design Kit Demonstration

The following step-by-step demonstration will walk you through the various features and capabilities of this
reference design. There are three parts to this demonstration: Firmware Download, Example Application
Demonstration, and Mass Storage Device Demonstration.

Note: The demonstration instructions assume that a PC running Windows 2000/XP/Server2003 is being used.

5.1. Firmware Download

The steps in this section will guide you in downloading the USB MSD Reference Design firmware to the
C8051F340-TB target board.

1. Follow the 'Software Setup' instructions in the C8051F340DK User's Guide to install the Silicon Laboratories
IDE. This document is available at the following web page: http://www.silabs.com/tgwWebApp/public/

web_content/products/Microcontrollers/USB/en/C8051F340DK.htm.

2. Depending on which type of debug adapter you have, set up the hardware as shown in one of the two diagrams
below (Figure 5, Figure 6). Consult the C8051F340DK User's Guide for detailed instructions.

AC/DC
Adapter

PC

Serial Port

Serial

Cable

Serial

Adapter

Ribbon

Cable

Target

Board

Figure 5. Hardware Setup using a Serial Debug Adapter

AC/DC

Adapter

PC

USB Port

USB

Cable

USB

Debug

Adapter

Ribbon Cable

Target Board

Figure 6. Hardware Setup using a USB Debug Adapter

3. Launch the Silicon Labs IDE using the icon from your Start Menu: 'Start Menu → Programs → Silicon
Laboratories

4. Before connecting to the target device, several connection options may need to be set. Open the 'Connection
Options' window by selecting 'Options
was included with the kit in the "Serial Adapter" section. Next, the correct "Debug Interface" must be selected.
C8051F34x family devices use the Silicon Labs 2-wire (C2) debug interface. Once these selections are made,
click the OK button to close the window.

→ Silicon Laboratories IDE'

→ Connection Options...' in the IDE menu. First, select the adapter that

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