Microchip Technology PIC18F46J50 User Manual

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PIC18F46J50 Full-Speed USB

Demonstration Board

User’s Guide

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

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PICSTART, rfPIC, SmartShunt and UNI/O are registered trademarks of Microchip Tec hnology Incorporated in the U.S.A. and other countries.

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Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

MCUs and dsPIC® DSCs, KEELOQ

code hopping

PIC18F46J50 FULL-SPEED USB

DEMONSTRATION BOARD

USER’S GUIDE

Preface ........................................................................................................................... 1

Chapter 1. Introduction

1.1 Introduction .....................................................................................................7

1.2 Demonstration Board Package Contents ....................................................... 7

1.3 PIC18F46J50 Family USB Capabilities ..........................................................7

Chapter 2. Board Hardware

2.1 Power Man age ment ...................................... .. .. ...........................................10

2.2 LEDs ............................................................................................................. 11

2.3 Push Button s ..... .. .. ..................................................... ... .. ............................. 11

2.4 Jumpers ........... .. ........................................................................................... 11

2.5 Programming the Microcontroller ................................................................. 12

2.6 Operation with the PIC18 Explorer or PICDEM™ HPC Explorer Boards ..... 13

Chapter 3. Preprogrammed Firmware

3.1 Overview ............. ......................................................................................... 15

3.2 Using the Co mp o s ite H ID + M S D Cl ass Demo Firmwa re .......... .................... 1 7

3.3 Using the HID Bootloader Firmware .............................................................18

Appendix A. Troubleshooting Tips ...........................................................................21

Appendix B. Board Schematics .................................................................................23

Worldwide Sales and Service ....................................................................................28

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

NOTES:

PIC18F46J50 FULL-SPEED USB

DEMONSTRATION BOARD

USER’S GUIDE

Preface

NOTICE TO CUSTOMERS

All documentation becomes dated and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our web site (www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the p age number. The numbering convention for the DS number is “DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB Select the Help menu and then Topics to open a list of available online help files.

IDE online help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the PIC18F46J50 Full-Speed USB Demonstration Board. Items in this chapter include:

• D ocum ent Lay out

• Conventions Used in this Guide

• Warranty Registration

• Recommended Reading

• The Microchip Web Site

• Development Systems Customer Change Notification Service

• Customer Support

• Doc um ent Rev isio n History

DOCUMENT LAYOUT

This document describes how to use the PIC18F46J50 Full-Speed USB Demonstration Board as a development tool to emulate and debug firmware on a target board. The manual layout is as follows:

• Chapter 1. “Introduction” – The board package’s contents and the USB capabilities of the PIC18F46J50 family of devices

• Ch apt er 2. “Board Hardware” – The board’s hardware elements and additional capabilities available by connecting the board to a PIC18 Explorer Board or PICDEM™ HPC Explorer Board

• Chapter 3. “Preprogrammed Firmware” – The board’s preloaded demonstrations, and other demonstrations and projects available in the MCHPFSUSB Framework

• Appendix A. “Troubleshooting Tips” – Solutions for common issues

• Appendix B. “Board Schematics” – Schematic diagrams

CONVENTIONS USED IN THIS GUIDE

This manual uses the following docum entat io n conven tion s:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic chara c ters Referenced books MPLAB

Initial caps A window the Output window

Quotes A field name in a window or

Underlined, italic text with right angle bracket

Bold characters A dialog-box button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces r epeated text var_name [,

Preface

IDE User’s Guide

Emphasized text ...is the only compiler...

A dialog the Settings dialog A menu selection select Enable Programmer

“Save project before build”

dialog A menu path File>Save

A tab Click the Power tab

4‘b0010, 2‘hF1 where N is the tota l number of digits, R is th e radi x and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

any valid filename

[options]

Choice of mut ually exclus ive arguments; an OR selection

Represents code supplied by user

errorlevel {0|1}

var_name...]

void main (void)

{ ...

}

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

WARRANTY REGISTRATION

Please complete the enclosed Warranty Registration Card and mail it promptly. Sending in the Warranty Registration Card entitles users to receive new product updates.

Interim software releases are available at the Microchip web site.

THE MICROCHIP WEB SITE

Microchip provides online support via the web site at www.microchip.com. The site makes files and information easily available to customers, including the following:

• Product Support – Data sheets and errata, application notes, sample programs, design resources, user’s guides, hardware support documents, and the latest software releases and archiv ed softwar e

• General Technical Support – Frequently Asked Questions (FAQs), links for technical support requests and online discussion groups, and a listing of the Microchip consultant program’s members

• Business of Microchip – Product selector and ordering guides, the latest Microchip press releases, and listings of seminars, events, and Microchip sales offices, distributors and factory representatives

DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE

Microchip’s customer notification service helps keep customers current on Microchip products. Subscribers receive email notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool.

To register, access the Microchip web site at www.microchip.com Change Notification and follow the registration instructions.

The Development Systems product group categories are:

• Compilers – The latest information on Microchip C compilers and other language tools.

The tools include the MPLAB MPLAB ASM30 assemblers, MPLINK™ and MPLAB LINK30 object linkers, and MPLIB™ and MPLAB LIB30 object libraries.

• Emulators – The latest information on Microchip in-circuit emulators. Among the emulators are the REAL ICE™ 2000 and REAL ICE 4000.

• In-Circuit Debuggers – The latest information on the Microchip in-circuit debuggers: PICkit™ 2, MPLAB ICD 2, MPLAB ICD 3 and REAL ICE.

• MPLAB Integrated Development Environment for development systems tools.

This list is focused on the MPLAB IDE, MPLAB SIM simulator, MPLAB IDE project manager, and general editing and debugging features.

• Programmers – The latest information on Microchip programmers. The programmers include the MPLAB PM3 and PRO MATE II device

programmers and the PICSTART programmers.

IDE – The latest information on Microchip MPLAB IDE, the Windows®

C18 and MPLAB C30 C compilers, MPASM™ and

Plus and PICkit™ 1 development

, click on Customer

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

CUSTOMER SUPPORT

Assistance for Microchip customers is available through:

• Distributors or representatives

• Local sales offices

• Field Application Engineers (FAEs)

• Technical support resources Customers should contact their distributor, representative or Field Application Engineer

(FAE) for support. Local sales offices are also available to help customers. A list of sales and service offices is on the back of this document.

Technical support is available through the web site at: http://support.microchip.com

DOCUMENT REVISION HISTORY

Revision A (March 2009)

• Initial release of this document.

NOTES:

Preface

1.1 INTRODUCTION

The PIC18F46J50 Full-Speed USB Demonstration Board is designed as an easy-to-use evaluation platform for Microchip’s full-speed, USB PIC18F46J50 family of microcontrollers.

The board can be operated as a stand-alone device. Alternately, for additional demonstration functionality, the board can be used in conjunction with the PIC18 Explorer Board (www. (www.

microchipDIRECT.com).

All members of the PIC18F46J50 family of microcontrollers fully support USB 2.0 full-speed and low-speed serial communications at signaling speeds of 12 Mbps or

1.5 Mbps.

The demonstration board package provides all of the hardware and software needed to develop USB compliant communication solutions.

This chapter discusses:

• Demonstration Board Package Contents

• PIC18F46J50 Family USB Capabilities

PIC18F46J50 FULL-SPEED USB

DEMONSTRATION BOARD

USER’S GUIDE

Chapter 1. Introduction

microchipDIRECT.com) or PICDE M™ HPC Explorer Board

1.2 DEMONSTRATION BOARD PACKAGE CONTENTS

The demonstration board package contains:

• The PIC18F46J50 Full-Speed USB Demonstration Board, preprogrammed with composite USB Human Interface Device (HID ) and Mass Storage Device (MSD) class demonstration firmware

• A standard USB A to mini-B cable for power and communication

• A six-pin, in-line ICSP™ to RJ-11 programming adapter board

• The PICDEM™ Starter Kit CD-ROM, containing USB firmware projects, PC application source code, USB drivers and USB specific documentation, such as this user’s guide

1.3 PIC18F46J50 FAMILY USB CAPABILITIES

The PIC18F46J50 microcontroller is the “superset” device of the PIC18F46J50 family. The PIC18F46J50 has the largest memory and highest pin count in the family, but otherwise shares a nearly identical feature set with the other family devices. The only exclusionary exceptions are features that require pins not present on the family’s 28-pin devices.

All of the devices in the family are code compatible with each other and share these USB capabilities:

• USB 2.0 compliance

• Full-speed (12 Mbps) and low-speed (1.5 Mbps) operation

• Support of control, interrupt, bulk and isochronous transfers

• Support of up to 32 endpoints

• 3.8 Kbytes of dual access RAM for USB or general purpose use

• On-chip features for single chip USB implementation, including:

- USB Serial Interface Engine (SIE)

- USB transceiver

- USB pull-up resistors

- D+ and D- driver output impedance matching resistors

PIC18F46J50 FULL-SPEED USB

DEMONSTRATION BOARD

USER’S GUIDE

Chapter 2. Board Hardware

The PIC18F46J50 Full-Speed USB Demonstration Board can be used as a stand-alone device or — for additional functionality — plugged into either the PIC18 Explorer Board (www. (www.

microchipDIRECT.com).

When used alone, the board contains all of the hardware necessary to make a USB compliant, full-speed peripheral device. The board also has additional hardware elements for providing basic demonstration and development capability.

The additional elements include the following, with the element’s number indicating its location on the board in Figure 2-1:

1. Two miniature SMT red LEDs – Connected to the RE0 and RE1 I/O pins

2. 5V to 3.3V LDO low quiescent current regulator (TC1108-3.3VDB) – Enables

device to obtain power from USB port

3. 12 MHz SMT crystal – Can be used with the internal PLL to run the

microcontroller and USB module at frequencies of up to 48 MHz

4. MCP9701A analog output temperature sensor – Component U1, connected to

RE2 I/O pin

5. General purpose push button S2 – Connected to the RB2 I/O pin with a pull-up

resistor

6. MCLR

7. Six-pin, right-angle In-Circuit Serial Programming™ (ICSP™)

8. Jumpers for current measurement (JP3) and configuration (JP2)

9. A mini-B USB connector for power and communication

push button – For easy Reset of the microcontroller

programmer/debug header

microchipDIRECT.com) or PICDEM HPC Explorer Board

Board Hardware

FIGURE 2-1: PIC18F46J50 FULL-SPEED USB DEMONSTRATION BOARD

Full schematics of the PIC18F46J50 Full-Speed USB Demonstration Board are in

Appendix B. “Board Schematics”.

2.1 POWER MANAGEMENT

The USB interface provides +5V (nominal) power at up to 500 mA for use by USB peripheral devices. In order to take advantage of this bus provided power, a 3.3V, low dropout, low quiescent current linear regulator (TC1108-3.3VDB) has been included on the board. This enables the board to operate fully from USB bus power.

All USB compliant, bus-powered devices should implement a low-power, USB Suspend mode. This is because the USB host may , at its own discretion, halt all USB traffic – including Start-of-Frame packets – to a USB peripheral device for more than 3 ms. When a peripheral device detects this condition, it should drop to a low-power suspend state, so it draws no more than 2.5 mA from the +5V V

Two USB interrupts: IDLEIF (UIR<4>) and ACTVIF (UIR<2>) are useful in detecting when the low-power suspend condition should begin and when it actually ends.

BUS supply pin.

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

In order to meet this USB suspend current requirement, a USB peripheral should be designed so that it does not place large quiescent loads directly on the +5V V supply line from the USB port. If large loads will be supplied from the USB port, it is suggested that they be connected in a way that they can be turned off when the USB port is placed in the low-power suspend state.

The PIC18F46J50 Full-Speed USB Demonstration Board has been designed with these and other power management considerations in mind.

2.2 LEDs

Two high-efficiency, red LEDs have been included on the PIC18F46J50 Full-Speed USB Demonstration Board. The LEDs are connected to I/O pins, RE0 and RE1, and can be used for general purpose indication. The LEDs are connected so that they illuminate when the I/O pin controlling them is driven high.

2.3 PUSH BUTTONS

The board has two miniature push buttons. Push button, S4, connects to Master Clear Reset (MCLR

Push button, S2, provides a simple user interface for interacting with demonstration firmware projects. Default factory firmware is installed on the board and other USB firmware projects are available in the MCHPFSUSB Framework. (See Section 3.1 “Overview”.)

The push button is connected to pin RB2 on the PIC18F46J50 microcontroller which is pulled up to V ground.

) which resets the microcontroller.

DD through a 15-kΩ resistor. Pressing the button pulls the RB2 line to

BUS

2.4 JUMPERS

2.4.1 JP2 Jumper

JP2 is a three-pin header with the labels, “I”, “R” and “U”.

• “I” – Abbreviation referring to the ICE female header pin for the RC2 signal

• “R” – Abbreviation referring to microcontroller pin, RC2

• “U” – Abbreviation for the USB_ATTACH signal (see the schematics in Appendix B. “Board Schematics”.)

When the jumper is in the “R” to “I” position, the RC2 pin connects only to the ICE female header pin, just like most of the other general purpose I/O pins. When the jumper is in the “R” to “U” position, RC2 can be used to sense when the USB cable has been attached to the host and when the host is actively providing power to the +5V V

BUS line.

According to the USB 2.0 specifications, no device should ever pull the D+ or D- lines high (such as with the D+ or D- pull-up resistor) until the host actively powers the +5V V

BUS line. This is intended to prevent self-powered peripherals from ever sourcing

even small amounts of power to the host when the host is not powered. Small amounts of current could potentially prevent the host (and possibly other USB peripherals connected to that host) from fully becoming depowered, which could cause problems during power-up and initialization.

Self-powered peripherals should periodically monitor the +5V V when it is driven high. Only when it is powered should user firmware enable the USB module and turn on the D+ (for full speed) or D- (for low speed) pull-up resistor, signaling the device attach to the host.

BUS line and detect

Board Hardware

The JP2 jumper allows the microcontroller firmware to monitor the USB_ATTACH signal when the jumper cap is in the position, R - U.

The resistors, R15 and R17 of the schematics (see Appendix B. “Board Schematics”), serve multiple purposes. They level shift the +5V signal, provide a weak pull-down function on the V off/low state) and improve the ESD robustness of the circuit.

Peripherals that are purely bus-powered obtain all of their power directly from the +5V V is powered as the peripheral will not be able to source current on the D+, D- or V lines when the host is not powered.

2.4.2 JP3 Jumper

If the PIC18F46J50 Full-Speed USB Demonstration Board is used as a stand-alone device, it obtains its power from the USB cable. This requires jumper cap, JP3, to be installed, since the jumper is in series with the power supply from the +5V V from the USB connector.

If the jumper cap is removed from JP3, a current meter can be connected across the header to measure the current consumption from the USB cable. This enables measurement of the total USB +5V V developing USB devices to meet USB compliance specifications.

The current consumption measured at the JP3 header will include the quiescent current of the linear regulator, Q1, temperature sensor, U1, and the microcontroller, as well as any leakage due to other circuitry on the board.

BUS line (to oppose any leakage that would interfere with measuring VBUS in the

BUS line itself. For these types of devices, it is unnecessary to monitor when the VBUS

BUS

BUS pin

BUS current consumption, which is useful in

2.5 PROGRAMMING THE MICROCONTROLLER

The PIC18F46J50 Full-Speed USB Demonstration Board is too small to have the full-sized RJ-11 jack normally used to connect to Microchip In-Circuit Serial Programming™ (ICSP™) programmers. Instead, the board has a six-pin ICSP header (J4) that can be used as the connection for reprogramming the microcontroller.

The PICkit™ 2 ICSP programmer can be connected directly to the J4 header. Alternately, the six-pin, ICSP to RJ-11 adapter board, included with the board, can be used to reprogram the microcontroller with other RJ-11 based programmers. Examples of ICSP programmers that are supported (at the time this document’s publication) include the MPLAB REAL ICE™.

When connecting to the six-pin header, ensure that the polarity and alignment are correct. For reference, the board’s silk screen denotes pin 1 of the header (MCLR an arrow and has a square surrounding the pin.

The RJ-11 to ICSP adapter board also provides a reference on its silk screen with a square around the MCLR demonstration board, the two square markings are aligned with each other.

If the PIC18F46J50 Full-Speed USB Demonstration Board is being used with the PIC18 Explorer Board or PICDEM HPC Explorer Board, the board’s RJ-11 jack can also be used to reprogram or debug the PIC18F46J50.

In-Circuit Debugger, ICD 2 and ICD 3, and the In-Circuit Emulator,

pin. When the adapter board connects correctly to the

) with

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

2.6 OPERATION WITH THE PIC18 EXPLORER OR PICDEM™ HPC EXPLORER BOARDS

The basic hardware capabilities of the PIC18F46J50 Full-Speed USB Demonstration Board can be supplemented by plugging it into the PIC18 Explorer Board or PICDEM HPC Explorer Board. These boards have additional hardware features, such as:

• A UART level translator

• An RS-232 connector

• Eight general purpose indicator LEDs

• A potentiometer – Facilitates some of the USB demonstrations that read the voltage output by the potentiator

• A full-size RJ-11-style programming/debugging jack

• A PICtail™ daughter board connector – Enables easy probing of I/O pins or connection to other expansion boards (such as the SD/MMC PICtail™ daughter board, www.microchipDIRECT.com

Before connecting the PIC18F46J50 Full-Speed USB Demonstration Board to the PICDEM HPC Explorer Board or the PIC18 Explorer Board, ensure that the board’s PIC/ICE slider switch is in the “ICE” position. If the explorer board’s switch is in the wrong position, pin P5 on the PIC18F46J50 Full-Speed USB Demonstration Board is designed to physically interfere with the switch.

When the explorer board’s slider switch is in the ICE position, the MCLR board’s PIC18F8722 microcontroller is held in Reset. This prevents I/O pin contention, even though the PIC18F8722 and PIC18F46J50 microcontrollers electrically share I/O pins when the two boards are connected.

)

pin of the

NOTES:

Board Hardware

Chapter 3. Preprogrammed Firmware

3.1 OVERVIEW

Microchip provides a wide variety of USB related example firmware projects, PC application projects, drivers, and other related resources for developing complete USB peripheral and host devices. These resources are included in the MCHPFSUSB Framework distribution package.

The free package is on the CD-ROM disc that comes with the board. It can also be downloaded from the Microchip USB Design Center:

Many of the USB device demonstrations and projects in the MCHPFSUSB Framework are specifically intended for the PIC18F46J50 Full-Speed USB Demonstration Board, so they require no hardware or other modifications.

Some example USB firmware is preprogrammed on the PIC18F46J50 Full-Speed USB Demonstration Board. The microcontroller contains both demo firmware and a USB bootloader that is independent of the demo firmware. The bootloader can be used to program a new application’s firmware *.hex files into the microcontroller’s Flash memory, eliminating the need for a dedicated In-Circuit Serial Programming™ (ICSP™) programmer.

To enter the Bootloader mode, hold down the S2 push button and momentarily press and release the MCLR pin state once after coming out of Reset. (For more information on the USB bootloader, see Section 3.3 “Using the HID Bootloader Firmware”.)

The microcontroller firmware will enter the demo mode if the RB2 push button is not pressed during power-up or Reset. If the microcontroller is not in the Bootloader mode, it is in Demo mode. (For more information on the composite HID+MSD demo firmware, see Section 3.2 “Using the Composite HID+MSD Class Demo Firmware”.)

When a Demo mode device is plugged into a host PC, the device should automatically enumerate as a USB “composite” HID (Human Interface Device) and MSD (mass storage device). Common operating systems (including Windows Linux) ship with built-in HID and MSD class USB drivers. Additional drivers should not be needed to use the default demo firmware program med on the PIC18F46 J5 0 microcontroller.

With successful enumer ati on in Demo mode, unde r the Windo ws o perat ing sys tem , additional entries should appear in the Windows Device Manager dialog box. Figure 3-1 shows how the dialog box appears in the Windows XP with arrows indicating the new entries listed for the board. (The dialog box’s appearance may vary in other versions of the Windows operating systems, such as Windows Vista

PIC18F46J50 FULL-SPEED USB

http://www.microchip.com/usb

push button. The microcontroller firmware checks the RB2 I/O

or Windows 7.)

DEMONSTRATION BOARD

USER’S GUIDE

, Mac OS® and

operating system

Preprogrammed Firmware

Note: Lines indicate the new entries that appear because the device has

been attached to the PC.

FIGURE 3-1: WINDOWS® XP DEVICE MANAGER ENTRIES (DEMO MODE)

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

3.2 USING THE COMPOSITE HID+MSD CLASS DEMO FIRMWARE

3.2.1 MSD Interface

The MSD (Mass Storage Device) interface displays the PIC18F46J50 Full-Speed USB Demonstration Board in My Computer as a new drive volume, similar to a USB “thumb drive” Flash memory device. Upon successful enumeration in Demo mode, the new drive volume will display microcontroller‘s Flash memory.

For additional information, read the text file. If the device enumerates correctly in Demo mode and appears normal in the Device

Manager, but fails to appear as a new drive volume, see Appendix A. “Troubles hooting

Tips”.

3.2.2 HID Interface

The HID (Human Interface Device) interface enables generic USB data transfer to and from an attached device. Although the HID class normally is used for interface products, such as keyboards and mice, the HID interface alternatively can be used for other data transfer purposes.

The HID interface on the PIC18F46J50 Full-Speed USB Demonstration Board’s default firmware is meant to be used with the PC application project, HID PnP Demo Composite HID+MSD Demo only (PID=0x0054).exe, provided in the MCHPFSUSB Framework. The MCHPFSUSB Framework can be installed from the CD-ROM disc that comes with the board. The latest version of the package is also available from the Microchip USB Design Center:

www.microchip.com/usb

Readme.txt, a writable text file stored in the

If the MCHPFSUSB Framework Version 2.4 is installed in the default directory (C:\Microchip Solutions), the HID PnP Demo Composite HID+MSD Demo

only (PID=0x0054).exe executable file is in the directory:

C:\Microchip Solutions\USB Device - Composite - HID + MSD

The demo PC application is intended to be run under Windows and was written in Microsoft review the PC’s Control Panel – Add or Remove Programs list to ensure that the .NET Framework Version 2.0 (or later) redistributable package has been installed.

The .NET redistributable package is on the CD-ROM disc that comes with the board or it can be downloaded from Microsoft. (For additional details, see issue 3 in Appendix A. “Troubleshooting Tips”.)

If the USB device has been plugged in and has successfully enumerated, the device should be detected automatically by the demo PC application. Figure 3-2 gives an example of how the PC application appears in Windows XP.

Visual C++® 2005 Express Edition. If the executable fails to launch correctly,

Preprogrammed Firmware

FIGURE 3-2: HID DEMO APPLICATION

The demo PC application provides a simple graphical user interface for sending and receiving small amounts of example data to and from the HID interface on the USB device. Full source code for both this PC application and the demo firmware are included in the MCHPFSUSB Framework. Assuming the MCHPFSUSB Framework has been installed in the default location, the source code for both the firmware and PC application are found in the following directory:

C:\Microchip Solutions\USB Device - Composite - HID + MSD

The demo PC application can be used to toggle the LEDs on the demo board, determine the RB2 push button state and measure the analog voltage on the microcontroller’s RA0 I/O pin. The analog voltage on RA0 is measured by the ADC of the microcontroller and graphically displayed by the “ANx/POT Voltage” bar, as shown in Figure 3-2.

If the PIC18F46J50 Full-Speed USB Demonstration Board is used as a stand-alone device, it is recommended that an adjustable external power supply (between 0V and

3.3V) be attached to the RA0 pin to provide a more interesting demo experience. If the board is used in conjunction with the PIC18 Explorer Board or the PICDEM HPC Explorer Board, the analog potentiometer on those boards, tied to RA0, can be adjusted to alter the HID demo’s voltage display bar.

3.3 USING THE HID BOOTLOADER FIRMWARE

The PIC18F46J50 Full-Speed USB Demonstration Board is preprogrammed with HID class USB bootloader firmware as well as the USB composite HID+MSD demo firmware. The HID bootlo ad er is i ndep en de nt of th e co mp osi te HI D+ MS D de mo firmware.

The bootloader firmware can be used to update the Flash memory contents of the PIC18F46J50 microcontroller, similar to using a dedicated ICSP based programmer. When the bootloader is used, a new sending it directly over the USB cable to the PIC18F46J50.

The HID bootloader firmware uses self-programming operations to update the Flash memory contents of the microcontroller.

To use the HID bootloader:

1. Launch the HID bootloader application by selecting: Start>Programs>Microchip>MCHPFSUSB v2.4>USB HID Bootloader

The dialog box, shown in Figure 3-3, appears. (This dialog box appears whenever the USB device is not yet attached or the firmware is not in Bootloader mode.)

.hex file can be programmed into the device by

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

FIGURE 3-3: USB HID BOOTLOADER APPLICATION – NO DEVICE

2. Plug the PIC18F46J50 Full-Speed USB Demonstration Board into a free USB port.

3. Place the board in the Bootloader mode by pressing and holding down the S2 push button (RB2 I/O pin). While still holding down the S2 push button, momentarily press and release the MCLR the S2 button depressed until after the device has come out of Reset.

The bootloader firmware performs a quick check of the RB2 I/O pin after coming out of Reset to determine if the device should enter Bootloader or normal Demo mode.

As a result:

• The device re-enumerates as a generic HID class device (instead of a composite

HID+MSD device)

• The “USB HID Bootloader” PC application automatically detects the PIC18F46J50

Full-Speed USB Demonstration Board

• The dialog box, shown in Figure 3-4, appears

push button (S4) to reset the device, keeping

FIGURE 3-4: USB HID BOOTLOADER APPLICATION – DEVICE FOUND

Once the PC application has found the USB device, the application can be used to open the Intel

HEX 32-bit formatted *.hex firmware images and program them using

the respective buttons.

Preprogrammed Firmware

MPLAB IDE can be used to create these firmware image files by:

1. Building a firmware project and using a modified linker script necessary for the

bootloader.

2. Selecting File>Ex por t By default, the precompiled demo .hex files included in the MCHPFSUSB Framework

distribution can be programmed using the USB bootloader application. The demo’s firmware projects were created using the appropriately modified linker script, so the demos should work directly with the bootloader.

Programming a new firmware image using the bootloader does not erase or overwrite the bootloader firmware inside the microcontroller. To execute newly programmed firmware with the bootloader application, reset the microcontroller by pressing the MCLR push button.

For more details on using the HID USB bootloader, see the getting started guide for the bootloader in the MCHPFSUSB Framework documentation directory. If the default installation was used, that document is in the following directory:

C:\Microchip Solutions\Microchip\Usb\Documentation\Getting Started

and specifying the file format, INHX32.

PIC18F46J50 FULL-SPEED USB

DEMONSTRATION BOARD

USER’S GUIDE

Appendix A. Troubleshooting Tips

This appendix gives solutions for common issues.

Problem 1:

The USB device enumerates correctly in Demo mode (and appears normal in the Device Manager), but a new drive volume does not appear for the MSD interface.

Resolution:

See if the target system has a drive letter conflict. Common oper ating systems typically assign USB mass storage volumes (such as

Flash memory devices and detachable CD-ROM or floppy drives) to the next available drive letter (often “E:”). If, however, the automatically assigned drive letter has already been assigned to some other device (such as a mapped network drive), a conflict can occur with some Windows operating systems.

See Microsoft Knowledge Base article 297694 at the following link:

http://support.microsoft.com/kb/297694

To resolve this issue, do one of the following:

• Obtain the hotfix available from Microsoft

• Manually reassign the conflicting drive volume (such as a mapped network drive)

with a drive letter that is later in the alphabet (such as Z:)

Problem 2:

The USB device does not enumerate or appear in the Device Manager.

Resolution:

Verify the following:

• The microcontroller is powered

• Jumper cap, JP3, is installed so that the demonstration board is obtaining power

from the USB cable

• The microcontroller was programmed with the correct firmware The factory default firmware can be restored onto the microcontroller any time by using

the ICSP programming header and programming the microcontroller with the file, PIC18F46J50 FS USB Demo Board Factory Hex 23 Jan 2009.hex. T o do this:

1. Launch the MPLAB IDE application and select the ICSP programmer and the

correct device (PIC18F46J 50).

2. Select File>Im por t

3. Select the file, PIC18F46J50 FS USB Demo Board Factory Hex 23 Jan

2009.hex.

4. Attach the programmer and select Programmer>Program

Problem 3:

When a PC application, such as the HID bootloader and HID PnP Demo Composite HID+MSD Demo only (PID=0x0054).exe are launched, an error message

appears and the application does not open correctly.

Resolution:

The HID bootloader and HID PnP demo applications were developed in the Microsoft Visual C++ 2005 Express Edition development environment and will not run without the PC having the .NET Framework 2.0 (or higher) redistributable package installed. If the .NET package has not been installed, do so.

The .NET Framework redistributable package is available in the MCHPFSUSB Framework on the CD-ROM disc that comes with the PIC18F46J50 Full-Speed USB Demonstration Board. Alternately, the .NET package can be downloaded from the Microsoft web site:

Go to the Microsoft Download Center

and use the key words, “.NET Framework”.

The Windows Vista and Windows 7 operating systems already have support built-in for .NET Framework 2.0 or later, so installation of the .NET package is unnecessary. Earlier Windows operating systems, however, will require the package installation.

PIC18F46J50 FULL-SPEED USB

DEMONSTRATION BOARD

USER’S GUIDE

Appendix B. Board Schematics

Figure B-1 through Figure B-3 show the schematics for the PIC18F46J50 Full-Speed USB Demonstration Board.

When designing the PIC18F46J50 Full-Speed USB Demonstration Board, special care was taken to make the board USB 2.0, full-speed compliant. It is suggested that those designing new USB applications review section 7.2 of the official USB 2.0 specifications. That section includes important information related to power management (such as board inrush current) specifications necessary to pass USB compliance tests.

Board Schematics

1 F

0.1 F

2.2

F_Tant

0.1

56 k7

100 k

15 k7

8207

2 k7

1.5 k7

15 k7

PICkit™ 2 Style

Programming Header

Note 1: In order to be USB compliant, a USB device that is not purely bus-powered (such as containing a battery or having a

wall cube) should monitor the +5 V

BUS pin from the USB connector. If the host is not powered or the cable is not

attached, the USB device should not enable the USB module or the D+ (for full speed) or D- (for low speed) bus pull-up resistor (~1.5 kΩ). The USB_ATTACH signal can be connected to the microcontroller pin, RC2, through the JP2 jumper header. This signal can be used to monitor V

BUS.

2: When laying out a new PCB, providing for ESD protection components (such as U4 and C11) is recommended,

although they may not be necessary in all applications. The microcontroller has some built-in ESD protection, but it may not be sufficient for all applications depending on board layout and other system level considerations. Having provisions (solder pads) on the PCB for these extra components adds flexibility for later in the development process. ESD protection components will likely provide the best performance if they are located as close to the high-voltage entry point as possible (for example, next to the USB connector). When considering ESD components, it is recommended that selected components add little to no extra resistance in series with the D+ and D- pins, and no more than a few tens of pF of parasitic capacitance.

3: Certain pins (RA1, RA5, RB1, RD7 and RB5) perform “double duty”, being connected to more than one pin on the

female headers (ICE module). This is done so that the PIC18F46J50 family device can interface with more of the pre-existing PICtail™ Daughter Boards and other hardware features on the PIC18 Explorer Board and the PICDEM™ HPC Explorer board.

FIGURE B-1: PIC18F46J50 FULL-SPEED USB DEMONSTRATION BOARD – PINS

(1,2,3)

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

330

0.1 F

22 pF

12 MHz

22 pF

0.1

PIC18F46J50

Note 1: Components R10 and D3 are not required in production. They are included here in case the user accidentally tries to

communicate with the device while a high-voltage ICSP entry device is selected in MPLAB

IDE. The PIC18F46J50

family uses low-voltage ICSP™ entry (applying V

DD levels to MCLR). High-voltage ICSP entry devices pulse the

MCLR

pin at around 12V when entering the ICSP mode.

2: Components listed as “NL” are not populated on the production version of the demo board.

FIGURE B-2: PIC18F46J50 FULL-SPEED USB DEMONSTRATION BOARD –

MICROPROCESSOR

(1,2)

Board Schematics

1.18 k7 1%

Note 1: Components, R3 and J1, are used to “program” the adjustable linear regulator output voltage to 3.3V when the

PIC18F46J50 Full-Speed USB Demonstration Board is plugged into either the PIC18 Explorer Board or the PICDEM™ HPC Explorer Board.

2: The ICE module consists of the female header pins on the bottom of the board. Most pins on the microcontroller are

directly routed to their respective signal names on the ICE module. Exceptions to this are the signals coming from the following microcontroller pins: RA1, RA5, RA6, RA7, RB1, RB5, RC2 and RD7.

FIGURE B-3: PIC18F46J50 FULL-SPEED USB DEMONSTRATION BOARD – ICE MODULE

(1,2)

PIC18F46J50 Full-Speed USB Demonstration Board User’s Guide

NOTES:

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Microchip Technology PIC18F46J50 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Preface

INTRODUCTION

DOCUMENT LAYOUT

CONVENTIONS USED IN THIS GUIDE

WARRANTY REGISTRATION

RECOMMENDED READING

THE MICROCHIP WEB SITE

DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE

CUSTOMER SUPPORT

DOCUMENT REVISION HISTORY

1.1 INTRODUCTION

Chapter 1. Introduction

1.2 DEMONSTRATION BOARD PACKAGE CONTENTS

1.3 PIC18F46J50 FAMILY USB CAPABILITIES

Chapter 2. Board Hardware

FIGURE 2-1: PIC18F46J50 FULL-SPEED USB DEMONSTRATION BOARD

2.1 POWER MANAGEMENT

2.2 LEDs

2.3 PUSH BUTTONS

2.4 JUMPERS

2.4.1 JP2 Jumper

2.4.2 JP3 Jumper

2.5 PROGRAMMING THE MICROCONTROLLER

2.6 OPERATION WITH THE PIC18 EXPLORER OR PICDEM™ HPC EXPLORER BOARDS

Chapter 3. Preprogrammed Firmware

3.1 OVERVIEW

FIGURE 3-1: WINDOWS® XP DEVICE MANAGER ENTRIES (DEMO MODE)

3.2 USING THE COMPOSITE HID+MSD CLASS DEMO FIRMWARE

3.2.1 MSD Interface

3.2.2 HID Interface

FIGURE 3-2: HID DEMO APPLICATION

3.3 USING THE HID BOOTLOADER FIRMWARE

FIGURE 3-3: USB HID BOOTLOADER APPLICATION – NO DEVICE

FIGURE 3-4: USB HID BOOTLOADER APPLICATION – DEVICE FOUND

Appendix A. Troubleshooting Tips

Appendix B. Board Schematics

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