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PICDEM FS USB Demonstrationt Board User's Guide

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2. 01 00000000000 e o amp 5 ICD o olg o a 0000000000000000000 0 1 Microcontroller The 44 pin TQFP PIC18F4550 microcontroller U2 is the heart of the demonstration board and provides all USB functionality on one chip Refer to the device data sheet DS39632 for a complete discussion of the microcontroller and its feature set 2 ICE Interface Riser The microcontroller is surrounded by a 44 pin pad U5 arranged as four groups of 11 on each side These locations can be used to mount a riser for interfacing with Microchip s MPLAB ICE 2000 4000 emulator system DS51526B page 8 2008 Microchip Technology Inc Introduction to the PICDEM FS USB Board 3 Oscillator The demonstration board uses a 20 MHz crystal oscillator Y1 as the primary clock service The PIC18F4550 uses this oscillator to generate the necessary clock signals for both the USB Serial Interface Engine SIE and the processor 4 ICD Configuration Jumpers These three unpopulated jumper positions allow the user to choose either legacy or dedicated ICSP and ICD ports for th
3. 15 Internet nsreereereseee 5 2008 Microchip Technology Inc DS51526B page 43 MICROCHIP WORLDWIDE SALES AND SERVICE AMERICAS Corporate Office 2355 West Chandler Blvd Chandler AZ 85224 6199 Tel 480 792 7200 Fax 480 792 7277 Technical Support http support microchip com Web Address www microchip com Atlanta Duluth GA Tel 678 957 9614 Fax 678 957 1455 Boston Westborough MA Tel 774 760 0087 Fax 774 760 0088 Chicago Itasca IL Tel 630 285 0071 Fax 630 285 0075 Dallas Addison TX Tel 972 818 7423 Fax 972 818 2924 Detroit Farmington Hills MI Tel 248 538 2250 Fax 248 538 2260 Kokomo Kokomo IN Tel 765 864 8360 Fax 765 864 8387 Los Angeles Mission Viejo CA Tel 949 462 9523 Fax 949 462 9608 Santa Clara Santa Clara CA Tel 408 961 6444 Fax 408 961 6445 Toronto Mississauga Ontario Canada Tel 905 673 0699 Fax 905 673 6509 ASIA PACIFIC Asia Pacific Office Suites 3707 14 37th Floor Tower 6 The Gateway Harbour City Kowloon Hong Kong Tel 852 2401 1200 Fax 852 2401 3431 Australia Sydney Tel 61 2 9868 6733 Fax 61 2 9868 6755 China Beijing Tel 86 10 8528 2100 Fax 86 10 8528 2104 China Chengdu Tel 86 28 8665 5511 Fax 86 28 8665 7889 China Hong Kong SAR Tel 852 2401 1200 Fax 852 2401 3431 China Nanjing Tel 86 25 8473 2460 Fax
4. 41 luo e 9 PICDEM FS USB Software Package 14 Serial DB9F KANU NATA MUNDA AA ose HALIA cese roa E 9 PICtail Daughter Board 9 Customer Notification 5 Potentiometer sssssscttttenes 9 Customer 6 Pushbuttons D hcc 9 Demo Modem cesse tud SE 21 Demo Software R Bootload 22 Reading Recommended 4 Demo Tool 21 292 het mes e RR 9 12 Documentation Configuration 32 Conventions heec eee reus 3 WAY OUT p ett AA casa decr Eo Feo cede 2 T Temperature 9 33 Expansion 9 Thermal Sensor eene 39 F U Framework esses 29 USART LR I MATER ee 39 H USB Interface 11 Hardware Configuration Jumper Settings ssssnee 31 Warranty Registration 4 Host Computer 13 WWW Address s esee citer rS 5 ICD Connector 9 ICSP ICD Connector CON GA vento 33 Installing the USB Device
5. MICROCHIP PICDEM FS USB DEMONSTRATION BOARD USER S GUIDE 2008 Microchip Technology Inc 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
6. file is different from the board s default setting gt Load HEX F Using a different setting could cause the bootload ROCHIP interface to stop functioning Click Yes To use the setting contained in the hex file No To use the board s default setting Cancel To use the board s current setting tload Mode Entry tton 52 then reset the Yes No ush button 51 Clear Screen WARNING CPU Sys Clock Select is not no divide 2 in PLL mode zi Ready Copyright C Microchip Technology Inc 2004 When a file is loaded either from a device or a file the bootloader demo software also parses the file to determine if code is available for the different memory areas If a device is programmed with that file only those memory areas with code present are programmed the other memory areas are left unchanged For example a hex file that is missing data for the data EEPROM or Configuration Words will only program the target device s program memory and user ID spaces the existing configuration and stored EEPROM information will be preserved 3 5 5 Writing Application Code with the Bootloader The bootloader operates as a separate entity which means that an application can be developed with very little concern about what the bootloader is doing This is as it should be the bootloader should be dormant code until an event initiates its operation Ideally bootloader code should never be runnin
7. Tr 5 AGH 2008 Microchip Technology Inc DS51526B page 38 BOARD SCHEMATIC PART 2 USART USB INTERFACE THERMAL SENSOR AND STATUS LEDS FIGURE A 3 0HH 9 9 Nt O IS AOS Ead al Ag rara nyol s OSVZETXVN nio l J gO UB vO 2 2H 9 za 9 29 A Si QN9 29 Y C OS 9 29 10 Ok XH SUME sig n jo OF R a Nr HN OL epe 4 x S cd La 1 z E EN g A x A A lt UO gJ 41 N M lt DS51526B page 39 2008 Microchip Technology Inc BOARD SCHEMATIC PART 3 CONFIGURATION JUMPERS PICkit HEADERS AND OPTIONAL MPLAB ICE HEADER PICDEM FS USB User s Guide FIGURE A 4
8. 6 1 HIGHLIGHTS This chapter discusses the following Common issues with the PICDEM FS USB demonstration board and how to solve them 6 2 COMMON PROBLEMS 1 The Power LED is not lit Normally the PICDEM FS USB board behaves by default as a bus powered device If itis connected to a functioning USB port the board will power up and D7 will light If this does not happen Verify that the USB port on the host system is actually working by plugging a USB device that is known to be good into the port Verify that the cable is working by substituting a known functional cable If a power supply is connected to the board it will switch to Self Power mode automatically D7 will not be lit and D8 will light instead If this does not happen Verify that the power supply is plugged in and the wall outlet has power If battery connection is used verify that the correct polarity is used Check that voltage is available 9 at the power supply s plug If an OEM power supply is not being used check for appropriate voltage 9 VDC Check that the regulated voltage 5 VDc is available 2 appropriate Power LED is lit but the system does not recognize the board Check the USB cable for proper connections to the board and the computer If necessary verify the cable by swapping in another cable that is known to be good If the Demo Tool software is running press and release S1 to reset the board In Windows Device M
9. Copenhagen Tel 45 4450 2828 Fax 45 4485 2829 France Paris Tel 33 1 69 53 63 20 Fax 33 1 69 30 90 79 Germany Munich Tel 49 89 627 144 0 Fax 49 89 627 144 44 Italy Milan Tel 39 0331 742611 Fax 39 0331 466781 Netherlands Drunen Tel 31 416 690399 Fax 31 416 690340 Spain Madrid Tel 34 91 708 08 90 Fax 34 91 708 08 91 UK Wokingham Tel 44 118 921 5869 Fax 44 118 921 5820 01 02 08 DS51526B page 44 2008 Microchip Technology Inc
10. DS51526B page 42 2008 Microchip Technology Inc MICROCHIP PICDEM FS USB USER S GUIDE Index B J Block Diagrams Jumper Descriptions and Locations 31 PICDEM FS USB Board 37 L Bootload 22 Usinge nee e M CN M M 24 LEDs Bootloader 0 00 4 9 10 15 35 and Writing Application Code 26 Sani edere ton EEN E 9 10 12 39 Considerations in 25 M Program Memory 23 Microchip Internet Web 5 Microchip USB Firmware Framework 7 Clock Configuration sese 10 MPLAB ICE Interface 44 4 8 Code Examples Assembly Linker Script for Use 22 do NE 55 Cellet nee cid 9 10 C18 Linker Script for Use with Bootloader 28 P Reset Vector Insert 27 1 18 4550 7 8 22 25 34 37 38 Configuration 9 31 PICDEM FS USB Board ERREUR RR EE 9 34 Block Diagram reu der dic d 37 Locations Jumper Locations eee 32 Confirming Operation sse 17 38 40 Connectors Signals in Schematic table
11. 3 shows the electrical connection for the USB interface on the board FIGURE 1 3 USB INTERFACE SHOWING ON CHIP COMPONENTS USBC t onnector PIC18F4550 partial 1 VBUS 5V p 2 USB 3 Transceiver a 1 5kQ 1 5kQ USB 3 3V Voltage Regulator 2008 Microchip Technology Inc DS51526B page 11 PICDEM FS USB User s Guide 1 4 4 RS 232 Interface The PICDEM FS USB board fully supports RS 232 serial communications including hardware flow control RTS CTS signalling generated by pins RA2 and RA3 of the microcontroller One RS 232 female connector and all supporting circuitry are included 1 4 5 Status LEDs There are four firmware controllable LEDs D1 through D4 An LED is turned on when the corresponding port bit has the value of 1 and off when the port bit is 0 The PICDEM FS USB demo board comes preprogrammed with firmware which uses LEDs D1 and D2 to indicate the current USB device state Table 1 2 summarizes the LED values in relation to different USB device states The meaning of each of the USB device states can be found in Chapter 9 of the USB Specification Note In bus powered applications flashing D1 and D2 in Suspended mode is recommended the current draw is likely to exceed the limits specified in the USB Specification It is implemented in the original firmware for the demonstration board for demonstration pur
12. adapters DS51526B page 16 2008 Microchip Technology Inc Getting Started with the PICDEM FS USB Board 2 3 4 Confirming Operation If Power LED D7 is lit or D8 if an external power supply is being used and the driver installation completed successfully it can generally be assumed that the demonstration board s hardware is working correctly However it may be useful to verify that the board can actually communicate with the host system using the Demo Tool application To do this 1 Launch the Demo Tool application by clicking on the PICDEM FS USB Demo Tool icon from the Start menu 2 Select the Demo Mode tab to access the Demo Mode controls Figure 2 2 3 In the Select PICDEM FS USB Board dropdown list select PICDEM FS USB 0 Demo 4 Click the Connect button A temperature number should appear in the Real Time Temperature window almost immediately If an appropriate temperature appears the demonstration board is ready for your use FIGURE 2 2 THE DEMO MODE WINDOW PARTIAL VIEW IB xj Bootload Mode Demo Mode Select PICDEM FS USB Board Jy Temperature Display Toggle LEDs Data Mode j mj Potentiometer Display Temperature Resistance Ohm m Clear Screen 2008 Microchip Technology Inc DS51526B page 17 PICDEM FS USB User s Guide NOTES DS51526B page 18 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Ch
13. and installing the package the driver which Windows is actively using may still need to be manually updated Open the device manager right click on the device and use the Update Driver option to install the new version of the driver gt F___L__ AA UU 8 DS51526B page 36 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Appendix A PICDEM M FS USB Board Technical Information A 1 HIGHLIGHTS This chapter will cover the following topics PICDEM FS USB Block Diagram PICDEM FS USB Board Schematics 2 BLOCK DIAGRAM FIGURE A 1 PICDEM FS USB DEMONSTRATION BOARD FUNCTIONAL BLOCK DIAGRAM 20 MHz Oscillator USB Connector Reset Switch J1 51 RS232 Port lt P1 U1 User Switches gt S2 S3 PIC18F4550 U2 ICD Connector 2 J3 gt Expansion and 4 PICtail Headers J6 J7 Temperature Sensor T U4 Status LEDs m 1 4 5 Bus Power gt pp rns 9 optional Regulation Power LEDs D7 D8 2008 Microchip Technology Inc DS51526B page 37 PICDEM FS USB User s Guide PICDEM FS USB BOARD SCHEMATICS A 3 BOARD SCHEMATIC PART 1 MICROCONTROLLER VOLTAGE REGULATION AND ASSOCIATED PARTS FIGURE A 2 nr
14. common problems AU UU UA 2 Gnr nr DS51526B page 4 2008 Microchip Technology Inc Preface THE MICROCHIP WEB SITE Microchip provides online support via our web site at www microchip com This web site is used as a means to make files and information easily available to customers Accessible by using your favorite Internet browser the web site contains the following information Product Support Data sheets and errata application notes and sample programs design resources user s guides and hardware support documents latest software releases and archived software General Technical Support Frequently Asked Questions FAQs technical support requests online discussion groups Microchip consultant program member listing Business of Microchip Product selector and ordering guides latest Microchip press releases listing of seminars and events listings of 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 will receive e mail notification whenever there are changes updates revisions or errata related to a specified product family or development tool of interest To register access the Microchip web site at www microchip com click on Customer Change Notification and follow the registrati
15. numbering convention for the DS number is DSXXXXXA where XXXXX is the document number and is the revision level of the document For the most up to date information on development tools see the MPLAB IDE on line help Select the Help menu and then Topics to open a list of available on line help files INTRODUCTION This chapter contains general information that will be useful to know before using the Chapter Name Items discussed in this chapter include About This Guide Warranty Registration Recommended Reading Troubleshooting The Microchip Web Site Development Systems Customer Change Notification Service Customer Support 2008 Microchip Technology Inc DS51526B page 1 PICDEM FS USB User s Guide ABOUT THIS GUIDE Document Layout This document describes how to use the PICDEM FS USB demonstration board as a development tool for creating full speed USB applications The manual layout is as follows Chapter 1 Introduction to the PICDEM FS USB Board describes the hardware of the demonstration board and how it can be used in creating new USB solutions Chapter 2 Getting Started with the PICDEM FS USB Board describes how to connect the demonstration board to a host system and how to install the Demonstration Tool software Chapter 3 Using the Demo Tool Software describes how to use the application in both Demo and Bootload modes Chapter 4 Using the Microchip USB F
16. ojo cz o o 5 o u2 8 iol 2 8 35 0 8 Yi P16 0 o P15 o o e14 o Dedicat d 5 2 1 Serial Port Configuration The RS 232 serial port on the demonstration board incorporates hardware flow control with CTS and RTS for applications that reguire these control signalizes makes the port useful for developing a wide range of serial to USB translators For those applications that do not require hardware flow control or use software flow control instead the hard ware flow control feature can be selectively disabled by cutting the traces at JP4 and JP6 Note that the CTS signal and the self power sense signal share a single controller port RA2 These two functions cannot be used concurrently The CTS is an output signal from the microcontroller while the self power sense signal is an input signal The port must be configured either as an input or an output to use each mode JP6 is provided to explicitly disable the CTS signal DS51526B page 32 2008 Microchip Technology Inc Reconfiguring the PICDEM FS USB Hardware 5 2 2 Disabling the Temperature Sensor For the TC77 temperature sensor each of the three lines that it uses to communicate with the controller are bridged with a s
17. release versions of the MCHPFSUSB USB framework MCHPFSUSB Firmware User s Guide DS51679 The MCHPFSUSB Firmware User s Guide includes important information useful in understanding how the reference USB firmware works This framework can be found on the Microchip USB design center http www microchip com usb Readme Files For the latest information on using other tools read the tool specific Readme files in the Readmes subdirectory of the MPLAB IDE installation directory The Readme files contain update information and known issues that may not be included in this user s guide PIC18F2445 2550 4445 4550 Device Data Sheet DS39632 This is the comprehensive reference for Microchip s enhanced microcontroller with Full Speed USB For users already familiar with the USB protocol the data sheet provides the basic information needed for designing the hardware and firmware for a Microchip based USB solution USB Specification Revision 2 0 USB Implementers Forum Inc www usb org For developers creating a USB application from the ground up this is the comprehensive reference on the Universal Serial Bus protocol All features of USB from physical and electrical specifications to data and communication protocols to device management are defined here Chapters 5 8 and 9 are especially useful for those interested in understanding and developing USB peripheral devices TROUBLESHOOTING See Chapter 6 Troubleshooting for information on
18. relief under that Act Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates It is your responsibility to ensure that your application meets with your specifications MICROCHIP MAKES REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED WRITTEN OR ORAL STATUTORY OR OTHERWISE RELATED TO THE INFORMATION INCLUDING BUT NOT LIMITED TO ITS CONDITION QUALITY PERFORMANCE MERCHANTABILITY OR FITNESS FOR PURPOSE Microchip disclaims all liability arising from this information and its use Use of Microchip devices in life support and or safety applications is entirely at the buyer s risk and the buyer agrees to defend indemnify and hold harmless Microchip from any and all damages claims suits or expenses resulting from such use No licenses are conveyed implicitly or otherwise under any Microchip intellectual property rights QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV ISO TS 16949 2002 Trademarks The Microchip name and logo the Microchip logo Accuron dsPIC KEELOQ KEELOQ logo MPLAB PIC PICSTART PRO MATE rfPIC and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U S A and other countries Amp Lab FilterLab Linear Active Thermistor MXDEV MXLAB SEEVAL SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip
19. the power supply The PICDEM FS USB board uses two of the microcontroller s I O pins PORTA lt 2 1 gt to sense which supply is available PORTA 2 monitors the regulator while PORTA 1 senses the USB cable When a port is read as 1 its corresponding power source is active When a port is read as 0 its source is disconnected The combinations of PORTA states are shown in Table 1 1 For more details on power requirement and management refer to Microchip applica tion note AN950 Power Management for PIC18 USB Microcontrollers with nanoWatt Technology DS00950 TABLE 1 1 lt 2 1 gt STATE COMBINATIONS AND THEIR MEANINGS lt 1 gt lt 2 gt Status 1 1 USB cable and power supply are both connected board is self powered D8 is lit 1 0 USB cable is attached board is bus powered D7 is lit 0 1 Power supply only is attached board is self powered D8 is lit 0 0 N A 1 4 3 USB Interface The PICDEM FS USB board utilizes the on chip USB voltage regulator transceivers and pull up resistors of the PIC18F4550 This helps reduce the number of external components The USB connection can be electrically detached by disabling the USB module in the firmware By disabling the USB module in firmware setting the USBEN bit in the register to 07 the on chip USB voltage regulator will also be disabled This simulates the physical detachment of the USB cable Figure 1
20. this case it should only be necessary to reset the board press and release 51 5 Onrunning Bootload mode for the first time the host system tries to repeat the driver installation process Because the demo and bootloader firmware are essentially two separate pieces of code with individual product IDs the host system will see each as a separate device Each device will require the USB driver to be installed separately for it Allow the Windows Install Wizard to use the same inf file used for the original driver installation 6 Pm using Windows Vista and can t install the custom USB driver Make sure you are attempting to install the latest version of the driver Older versions of the custom driver did not support Windows Vista The latest version of the custom driver as well as the latest versions of the USB reference projects can be obtained from www microchip com usb Pm using Windows Vista and even though I can install the custom USB driver correctly the PICDEM FS USB Demo Tool does not appear to be working correctly The demo tool is generating pop up error messages or my device does not appear in the drop down device selection list even though it is definitely plugged in correctly Make sure you are using the latest version of the custom class USB driver and the PDFSUSB demo tool application Older versions did not support Windows Vista The latest versions can be obtained from www microchip com usb After downloading
21. to show that power is being supplied to the board and to indicate how the board is being powered LED D7 indicates that the board is being powered from the bus while D8 indicates the board is being powered from a separate power supply 10 Reset Pushbutton This switch S1 is tied to the MCLR pin of the PIC18F4550 controller pressing it causes a hard device Reset 11 Power Connector Power 9 VDC can be supplied to the board from an external power adapter through a mini barrel jack Using an external supply is optional as all examples provided with the demonstration board can use power from the USB cable 12 USB Connector This is a standard USB series B receptacle The USB port is the primary channel for controlling and communicating with the demonstration board 13 ICD Connector This 6 wire RJ11 connector provides the standard interface used by Microchip development and demonstration boards for programming and debugging applications using MPLAB ICD 2 and other development tools 14 Status LED Bank A bank of four green LEDs is used to show the operational status of the board Two LEDs D1 and D2 are used by the application firmware to indicate the status of the USB connection The other LEDs D3 and D4 can be defined by the user they are directly controllable through the Demo Tool software 15 User Defined Pushbuttons These two switches S2 and S3 are provided to simulate digital control inputs Pressing either button causes
22. 42 OVERVIEW OF THE FRAMEWORK The example code preprogrammed on the PICDEM FS USB Demo Board was created using the Microchip USB framework known as MCHPFSUSB Refer to the MCHPFSUSB Firmware User s Guide 0551679 and the accompanying release notes for a description of the framework This framework can be found on the Microchip USB design center http www microchip com usb The framework includes a number of MPLAB IDE based USB firmware projects which can be used as a starting point for developing new USB applications 2008 Microchip Technology Inc DS51526B page 29 PICDEM FS USB User s Guide NOTES DS51526B page 30 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Chapter 5 Reconfiguring the PICDEM M FS USB Hardware 5 4 HIGHLIGHTS This chapter covers the following Configuring the Demonstration Board Options Restoring the PICDEM FS USB Firmware 5 2 CONFIGURING THE DEMONSTRATION BOARD OPTIONS The PICDEM FS USB board can be configured to enable or disable its various hard ware features A total of 16 jumper locations are controlled in various places around the board As shipped from the factory all of the locations are bridged by circuit traces and all of the features are enabled To change this the user will need to cut the traces and install pins and a block jumper Afterwards the features can be enabled or disabled easily by installing or removing the jumper In some i
23. 4D8 PID 0 000 Note Because the demo and bootloader are two different applications they are treated as two devices The Microchip USB driver will attempt to install when each of the applications is launched for the first time In the procedure described for the previous chapter the USB driver for the demo application was installed The driver for the bootload application will begin installation on its first launch 2008 Microchip Technology Inc DS51526B page 19 PICDEM FS USB User s Guide 3 3 STARTING THE PROGRAM The demo board is shipped from the factory with the default demonstration firmware program and the bootloader In the case that the demonstration program has been overwritten you can restore the firmware by using the bootloader or an external programmer such as MPLAB ICD 2 To run the Demo Tool application select Programs gt Microchip gt MCHPFSUSB vX X gt PICDEM FS USB Demo Tool from the Start menu Alternatively double click on the PDFSUSB icon or shortcut You will see the Demo Tool window Figure 3 1 By default the application launches in Bootload mode To switch to Demo mode click on the Demo Mode tab Figure 3 2 FIGURE 3 1 THE DEMO TOOL WINDOW BOOTLOAD MODE PICDEM FS USB Demo Tool Version 1 00 E loj x Bootload Mode Demo Mode Select PICDEM FS USB Board 2 Load HEX File KX MICROCHIP PICDEM FS USB Bootload Mode Entry Hold dow
24. 50 microcontroller the PICDEM FS USB demon stration board can also be configured to work with hardware emulators such as the MPLAB ICE 2000 and MPLAB ICE 4000 To do this the user must install a 44 pin riser in the area designated U5 on the board This is comprised of four 11 pin pads arranged in a square around the microcontroller A device adapter Microchip part number DVA18PQ440 will also be required for either of the MPLAB ICE devices Before using an external emulator users must also configure the board to disable the existing controller This is done by installing and configuring jumper JP1 In its default configuration with the upper pins connected JP1 assigns device Reset control to 51 With the lower pins connected JP1 grounds the MCLR pin of the PIC18F4550 holding itin permanent Reset In this state any external controller or emulator connected to the riser will control the demonstration board 5 3 RESTORING THE PICDEM FS USB FIRMWARE As shipped from the factory the microcontroller on the PICDEM FS USB board is pre programmed with the firmware required to interact with the Demo Tool application This provides the code that makes the interactive Demo mode possible and enables communication to establish the Bootload mode As users develop their own USB applications it is likely that the controller will be reprogrammed with new firmware If the original firmware is replaced the status LEDs and other interactive features o
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26. ACCESSBANK NAME accessram START 0x0 END 0x5F DATABANK NAME gpr0 START 0x60 END OxFF DATABANK NAME gpri START 0x100 END Ox1FF DATABANK 9 2 START 0x200 END 0x2FF DATABANK NAME gpr3 START 0x300 END 0x3FF DATABANK NAME usb4 START 0x400 END 0x4FF PROTECTED DATABANK NAME usb5 START 0x500 END 0x5FF PROTECTED DATABANK NAME usb6 START 0x600 END 0xX6FF PROTECTED DATABANK NAME usb7 START 0x700 END 0xX7FF PROTECTED ACCESSBANK NAME accesssfr START OxF60 END OxFFF PROTECTED SECTION NAME CONFIG ROM config 3 5 5 2 WRITING IN C When using the MPLAB C18 C compiler to develop firmware for an application the user has the choice to either rebuild the standard start up object 18 0181 with the new Reset vector or to insert the extra code shown in Example 3 2 The latter method is recommended Like modular assembly the linker file must be changed to incorporate the protected boot block and new vectors An example is shown in Example 3 3 For users of other compilers check with the compiler s software user guide to determine how to change the start up code and vectors EXAMPLE 3 2 RESET VECTOR INSERT FOR APPLICATIONS IN C extern void startup void See 018 in your C18 compiler directory pragma code RESET INTERRUPT VECTOR 0x000800 void reset void pragma code asm goto startup _endasm 2008 Microchip Technology Inc DS51526B page 27 PICDEM FS USB User s Gui
27. DEM FS USB Demo Board is intended to interface with the PICDEM FS USB Demo Tool which is a Windows oper ating system based application In order to use the preprogrammed demonstration firmware and software the following hardware and software requirements must be met PC compatible system An available USB port CD ROM drive for use with the accompanying CD Windows operating system see supported Windows version in the MCHPFSUSB Release Notes 2 3 INSTALLING THE DEMONSTRATION BOARD As a USB device the demonstration board requires very little effort to install most of the work is done by the operating system The three steps required are 1 Installing the MCHPFSUSB software package 2 Connecting the PICDEM FS USB board 3 Installing the USB driver 2008 Microchip Technology Inc DS51526B page 13 PICDEM FS USB User s Guide 2 3 1 Installing the MCHPFSUSB Software Package The software package that accompanies the PICDEM FS USB board contains all the software required to start using the board immediately It includes the Demo Tool application the Microchip general purpose custom class USB driver the reference code projects and related documentation To begin the installation process log onto the host PC system with elevated user privileges insert the CD and run the MCHPFSUSB Setup vX X exe executable where vX X is the version number of the package This setup file can also be downloaded from www microchip com us
28. HE PICDEM FS USB DEMONSTRATION BOARD The microcontroller for the PICDEM FS USB board is the PIC18F4550 the superset largest memory and pin count device of the PIC18F2455 2550 4455 4550 family All of these devices implement power saving nanoWatt Technology Enhanced Flash program memory and feature USB modules with the following USB 2 0 compliance Full speed 12 Mbit s and low speed 1 5 Mbit s operation Support of control interrupt bulk and isochronous transfers Support of up to 32 endpoints 1 Kbyte of dual access RAM for USB On chip features for a true single chip USB implementation including USB transceiver USB voltage regulator USB pull up resistors Interface for off chip USB transceiver The included reference designs and examples use the Microchip USB Firmware Framework This provides the services for handling lower level USB protocol management control transfer USB interrupt handling hardware register control and management Reference designs included with the demonstration kit cover Human Interface Devices HID the Communication Device Class CDC and the Microchip General Purpose USB device class 2008 Microchip Technology Inc DS51526B page 7 PICDEM FS USB User s Guide The software consists of the Microchip General Purpose USB Windows operating system driver mchpusb sys which allows a PC application to communicate directly with the device s endpoints A set of user friendly programming
29. MORY MAP BOOTLOADER IMPLEMENTED 0000h Bootloader Area Bootloader Memory Space O7FFh Reset Vector 0800 X High Priority Interrupt Vector 0808h Low Priority Interrupt Vector 0818h y User Memory Space Program Memory A ES w HH M n 2008 Microchip Technology Inc DS51526B page 23 PICDEM FS USB User s Guide 3 5 3 Using the Bootloader Once the board has been selected in the dropdown list the bootloader control buttons become active Figure 3 5 FIGURE 3 5 BOOTLOAD MODE CONTROLS Select PICDEM FS LISB Board PICDEM FS USB 0 Boot Bd Save To HEK File e Program Device gt Execute e Read Device 69 Erase Device Load File This loads file into the memory buffer displays the tentin the message window The data loaded can be used to program a target device A valid hex file must conform to the Intel HEX 32 format If an invalid file is selected a warning message WARNING No HEX file data is displayed If device configuration data is present the bootloader firmware will check it for configuration conflicts that might disable the board These are discussed in more detail in Section 3 5 4 Consideration When Using the Bootloader Each project s h
30. Technology Incorporated in the U S A Analog for the Digital Age Application Maestro CodeGuard dsPICDEM dsPICDEM net dsPICworks dsSPEAK ECAN ECONOMONITOR FanSense In Circuit Serial Programming ICSP ICEPIC Mindi MiWi MPASM MPLAB Certified logo MPLIB MPLINK mTouch PICkit PICDEM PICDEM net PICtail PowerCal Powerlnfo PowerMate PowerTool REAL ICE rfLAB Select Mode Total Endurance UNI O WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U S A and other countries SQTP is a service mark of Microchip Technology Incorporated in the U S A All other trademarks mentioned herein are property of their respective companies 2008 Microchip Technology Incorporated Printed in the U S A All Rights Reserved gt Printed on recycled paper 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 MCUs and dsPIC DSCs KEELOQ code hopping 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 DS51526B page ii 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Table of Conten
31. anager accessed through the System applet in the Control Panel use the Scan for Hardware Changes function to attempt to force the system to detect the board It is possible that the only firmware programmed into the microcontroller is the bootload firmware In this case enter Bootload mode by pressing and holding S2 while pressing and releasing S1 If the Bootload mode does not work it is possible that the firmware has become corrupted In this case it will be necessary to reprogram the microcontroller with the original firmware through an external in circuit programmer 2008 Microchip Technology Inc DS51526B page 35 PICDEM FS USB User s Guide 3 The board is functioning but has stopped communicating with the Demo Tool In Demo mode press and release S1 then reselect the board from the dropdown menu and click on Connect In Bootload mode press and hold S2 while resetting the board pressing and releasing 51 then reselect the board from the dropdown menu 4 After switching from Demo mode to Bootload mode in the Demo Tool the board is not available for selection in the dropdown list The demonstration board s default firmware behaves as two separate USB devices Invoking the bootloader firmware requires a special hardware signal generated by holding S2 while resetting the board pressing and releasing S1 Similarly the board will not be available automatically when switching from Bootload to Demo mode In
32. apter 3 Using the Demo Tool Application 3 1 HIGHLIGHTS The items discussed in this chapter are Software Overview Starting the Program Demo mode Bootload mode 3 2 SOFTWARE OVERVIEW The PICDEM FS USB Demo Tool more simply PDFSUSB or the Demo Tool is a Windows operating system based software application designed to be used with the PICDEM FS USB board for evaluating some of Microchip s full speed USB solutions Using this software you can evaluate USB features and performance offered by the PIC18F4550 microcontroller There are two modes available Demo mode and Bootload mode Demo mode demon strates communication to and from the host PC through USB in a typical embedded System setup The application shown includes data logging real time sensing and how to use the PC to control peripheral components Bootload mode allows designers to download and evaluate a different firmware program without using an additional external programmer The Demo and Bootloader modes are two separate firmware applications Both programs are totally separate and do not share any USB functions or descriptors The bootloader code is write protected and cannot be overwritten by firmware An external programmer such as MPLAB ICD 2 is required to erase the bootloader The two pro grams also have different USB product IDs but the same Vendor ID For reference the product IDs are Bootload VID 0x04D8 PID 0 000 Demo VID 0x0
33. b This installer will extract files including the custom class USB driver the Windows operating system based demo tool application and a variety of MPLAB IDE based USB projects The installer will also add start menu shortcuts to the demo tool and related documents Make sure to read the release notes after installing the package Note Using the default installation directory C MCHPFSUSB allows the reference projects to retain their original project paths and requires no additional configuration during setup If a different installation directory is used make sure to update the MPLAB IDE project include path directory or the projects may not build correctly Refer to the MCHPFSUSB Firmware User s Guide 0551679 for more details If problems are encountered while trying to install the package make sure to close background applications before proceeding If possible temporarily disable any anti virus software that the host system is running before installing the package and re enable it after the installation is complete This is also not absolutely necessary but may be helpful in some system configurations Note Itis possible that some organizations may implement a desktop computer policy sufficiently restrictive to prevent the user from loading any software at all In theory this can be done with any Windows operating system on a network If this describes your situation contact your local Information Services provid
34. de EXAMPLE 3 3 C18 LINKER SCRIPT FOR USE WITH BOOTLOADER Sample linker command file for 18F4550 with Bootloader LIBPATH FILES c018i o FILES clib lib FILES p18f4550 1ib CODEPAGE NAME boot START 0x0 END 0X7FF PROTECTED CODEPAGE NAME vectors START 0x800 END 0x829 PROTECTED CODEPAGE NAME page START 0x82A END 0X7FFF CODEPAGE NAME idlocs START 0x200000 END20x200007 PROTECTED CODEPAGE NAME config START 0x300000 END 0x30000D PROTECTED CODEPAGE NAME devid START 0X3FFFFE END 0X3FFFFF PROTECTED CODEPAGE NAME eedata START OxF00000 ENDZOxFOOO0FF PROTECTED ACCESSBANK NAME accessram START 0xO0 END 0xX5F DATABANK NAME gpr0 START 0x60 ENDZOxFF DATABANK 1 START 0x100 END 0xX1FF DATABANK 9 2 START 0x200 END 0x2FF DATABANK NAME gpr3 START 0x300 END 0x3FF DATABANK NAME usb4 START 0x400 END 0x4FF PROTECTED DATABANK NAME usb5 START 0x500 ENDZOx5FF PROTECTED DATABANK NAME usb6 START 0x600 END 0xX6FF PROTECTED DATABANK NAME usb7 START 0x700 END 0X7FF PROTECTED ACCESSBANK NAME accesssfr START 0xXF60 END 0XFFF PROTECTED SECTION NAME CONFIG ROM config STACK SIZE 0x100 RAM gpr3 DS51526B page 28 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Chapter 4 Using the Microchip USB Firmware Framework 4 14 A HIGHLIGHTS The items discussed in this chapter are Overview of the Framework
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36. e controller By default the board is hard configured for the legacy port The configuration and use of these jumpers is detailed in Section 5 2 4 Adding In Circuit Emulation Capability 5 Expansion and PlCtail Daughter Board Headers The pads at J6 and J7 are provided for users to install the header and directly access the microcontroller s I O port signals In addition the 14 even numbered pins of J6 those on the right side as viewed from the top serve as the interface for Microchip s PICtail daughter boards This allows the PICDEM FS USB board to be used as a test platform and USB communications interface for the PICtail daughter boards 6 Configuration Jumpers A total of 13 unpopulated jumper positions are provided across the board these allow users to modify the board by configuring its hardware to suit their needs By default all jumpers are bridged and all features are enabled The configuration and use of these jumpers is detailed in Section 5 2 Configuring the Demonstration Board Options 7 Potentiometer The potentiometer R20 simulates an analog input for the controller Its real time value can also displayed by the Demo Tool host software 8 Temperature Sensor A Microchip TC77 digital temperature sensor U4 continuously monitors the board s ambient temperature Data is transmitted to the controller via a 3 wire SPI interface and is displayed in real time by the Demo Tool software 9 Power LEDs Green These light
37. e Function CHP_MCLR Hardware Master Clear signal direct connection to MCLR pin of microcontroller ICPGC ICPGD ICRST Dedicated ICD port clock data and chip Reset signals ICD_RB6 ICD_RB7 Legacy ICD port signals PGC and PGD MCLR Hardware Master Clear signal OSC1 OSC2 External oscillator input for the microcontroller RESET Generic chip Reset signal routable to MCLR or ICRST RXn Bit n of microcontroller PORTx USB D USB D Differential USB signals USB ATTACH Bus attachment signal generated by power supply USB SLEEP Optional USB suspend signal from an external transceiver VUSB Regulated 3 3V VUsB supplied by microcontroller s on chip regulator VBUS Bus power voltage supplied from USB cable TABLE 2 RS 232 INTERFACE PINOUT RS 232 Pin PIC18F4550 Pin Pin Function 1 CD 2 RC6 TX RX Received Data PC Perspective 3 RC7 RX TX Transmit Data PC Perspective 4 DTR 5 Vss GND 6 DSR 7 5 Reguest To Send 8 2 CTS Clear Send 9 RI TABLE A 3 PERIPHERAL INPUT AND OUTPUT PIN ASSIGNMENTS PIC18F4550 Pin Function RDO LED D1 Output RD1 LED D2 Output RD2 LED D3 Output RD3 LED D4 Output RAO R20 potentiometer Input SDI RBO TC77 SPI Data Input SCK RB1 TC77 SPI Clock Output RB2 TC77 Chip Select Output 2008 Microchip Technology Inc DS51526B page 41 PICDEM FS USB User s Guide NOTES
38. e easiest way to change the temperature is to lightly blow air warm or cold on the sensor U4 In the Data Logging mode temperature data is not sent to the host continuously Instead temperature data is sampled every second and stored in the data memory buffer until the Acquire Data button is clicked At that point the firmware sends every thing in the buffer to the PC then empties the buffer Data can be acquired at any time if the time elapsed since the last acquisition is less than 30 seconds then a smaller set of data points will be acquired and displayed in the message window Clicking on Acquire Data too rapidly may return a WARNING No Data Acquired message this only means that the controller has not had an opportunity to collect a new temperature sample All data points are displayed at one time the temperature graph is also updated at that time Clicking on Clear Screen clears the message window The firmware can store up to 30 data points therefore it takes 30 seconds to fill the data memory buffer When the buffer becomes full the firmware replaces the oldest data point with a newer data value FIGURE 3 3 MESSAGE WINDOW IN DATA LOGGING MODE Clear Screen Temperature 7 MESSAGE Temperature Point 6 622 4 C MESSAGE Temperature Point 5 622 4 C MESSAGE Temperature Point 4 622 3 C MESSAGE Temperature Point 3 622 4 C MESSAGE Temperature Point 2 622 2 C MESSAGE Tempe
39. e used with the PICDEM FS USB Demo Tool application Figure 2 1 shows an example of how the device may appear in the device manager after driver installation The exact appearance text descriptions and icon can be modified by editing the inf file The exact appearance may differ between different versions of the inf file included in different versions of the MCHPFSUSB framework and with different operating systems Technical details describing how inf files work and how to edit them can be found in the Microsoft Developer Network MSDN documentation Note 1 The PICDEM FS USB demonstration board is configured in firmware as two devices a Demo application and a Bootload application The USB driver will install when each application is launched the first time 2 After the drivers are installed if the device is plugged into a different USB port on the same system the drivers may have to be reinstalled again This excess driver re installation can potentially be avoided by using a USB serial number string descriptor in the device firmware 3 On most systems elevated user privileges are required to install hardware device drivers If problems are encountered during driver installation make sure to use an account with high enough privileges FIGURE 2 1 DEVICE MANAGER AFTER DRIVER INSTALLATION tg Biometric ce Computer 5 5 Custom USE Devices a Microchip Custom USB Device nam Disk drives E z Display
40. ead device function DS51526B page 24 2008 Microchip Technology Inc Using the Demo Tool Application Program Device The program device function programs the target device with the data loaded in the memory buffer Only the type of memory present in the memory buffer will be programmed The function automatically erases the pro gram memory 00800 to Ox7FFF and user ID memory 0 200000 to 0x200007 before writing new data to these locations Memory contents are verified after the write operation Abort Operation The abort operation function is enabled when programming reading or erasing the device This function causes the current operation to terminate 3 5 4 Consideration When Using the Bootloader The PIC18F4550 microcontroller for the PICDEM FS USB board has a specific config uration setting that is necessary for the bootload program to function The USB voltage regulator and device oscillator settings are both critical and cannot be changed Other settings such as code protection WDT and LVP are less critical but may cause irreversible side effects The default configuration values are shown in Table 3 1 The configuration data contained in a hex file may violate the restrictions on the critical configuration settings described above Should this happen the Demo Tool will display a warning dialog box Figure 3 6 This will also be accompanied by a brief text descrip tion of the configuration conflict Users have
41. eparate jumper Removing all three jumpers JP10 JP11 and JP12 disables the sensor s function and makes all three controller ports available to the user 5 2 3 ICSP ICD Configuration Using the MPLAB IDE and MPLAB ICD 2 users can reprogram the board s microcontroller using In Circuit Serial Programming and debug firmware code using In Circuit Debugger The RJ 11 receptacle J3 also known as the ICSP ICD connector is the standard MPLAB ICD 2 interface found on most Microchip development boards Most PIC18 microcontrollers only have one legacy ICSP ICD port which shares 1 0 pins RB6 and RB7 When used the legacy port prevents applications from using these pins as normal ports The 44 pin TQFP version of the PIC18F4550 is the only vari ant of the full speed USB family of devices to have a second ICSP ICD port on pins not used for I O This dedicated port allows RB6 and to be utilized by the user s application The PICDEM FS USB board can be configured to work with either the legacy or dedi cated port by using jumpers JP14 through JP16 As shipped the demonstration board is hardware configured for the legacy port To change this the user must cut the traces indicated in Figure 5 1 item 14 and install pins and box jumpers When installed the ICD connector is configured by the jumpers as shown in Table 5 2 In addition to setting the jumpers the ICPRT Configuration bit in CONFIGAL must also be properly s
42. er for assistance in installing this software DS51526B page 14 2008 Microchip Technology Inc Getting Started with the PICDEM FS USB Board 2 3 2 Connecting the PICDEM FS USB Board To connect the demonstration board 1 Unbox and unwrap the board and set it on a non conductive surface near the host system 2 Connect the USB cable supplied in the kit to an open USB port on the host system or a USB hub connected to the host system and to the USB connector on the board 3 Check the board The green Power LED D7 should light up if self powered 08 should light up instead Windows should automatically detect the new device and launch the Found New Hardware Wizard For additional assistance refer to Chapter 6 Troubleshooting 2 3 3 Installing the USB Device Driver Not all USB devices require user provided device drivers Some types of USB related drivers are provided by and distributed along with the operating system For example modern versions of Windows Linux and Macintosh operating systems are distributed with Human Interface Device HID class USB drivers Upon detecting the connection of a HID class USB device such as a mouse the operating system automatically uses the built in drivers and no user provided driver installation is required The PICDEM FS USB Demo Board comes preprogrammed with custom device class firmware which relies on the Microchip general purpose USB driver Since this driver is not p
43. et To enable the dedicated ICSP ICD port ICPRT must be set 7 1 When the board is configured to use the dedicated ICSP ICD port the Reset switch 1 will no longer function The ICRST pin acts only as an active high Reset port which works when the MPLAB ICD 2 sends a high voltage programming signal ViHH The MCLR pin acts as both active low and active high Reset ports Thus the Reset switch 51 only works when connected to the MCLR pin Additional information regarding the dedicated ICSP ICD port can be found in the Special Features section of the device data sheet DS39632 TABLE 5 2 JUMPER CONFIGURATION FOR THE ICSP ICD CONNECTOR ICD Connector Configuration JP14 JP15 J16 Legacy ICD CHP MCLR RB7 RB6 Pins 1 2 Pins 1 2 Pins 1 2 Dedicated Port ICRST ICPGD ICPGC Pins 2 3 Pins 2 3 Pins 2 3 Note 1 For JP14 through JP16 pin 1 is the location closest to the microcontroller 2 Before using the ICD connector for programming or debugging verify that all three jumpers are set correctly Failure to do so may result in programming or debugger failure EE P X w H HJ H HP J amp H e 2008 Microchip Technology Inc DS51526B page 33 PICDEM FS USB User s Guide 5 2 4 Adding In Circuit Emulation Capability In addition to the on board PIC18F45
44. ex file MCHPUSB hex can be found in the output directory i e C MCHPFSUSB fw Cdc output and C MCHPFSUSB fw Hid Mouse output Read Device The read device function reads the entire memory range into the memory buffer and displays the content in the message window Program mem ory EEPROM the User ID and configuration data are all read A successful read operation is indicated by the message MESSAGE Read Completed in the Message window If the operation failed a warning WARNING Failed to read is shown Erase Device The erase device function erases the user program memory space only 0x0800 to Ox7FFF It does not erase the EEPROM User ID or configuration data Execute The execute function sends a Reset command to the bootloader firm ware causing a microcontroller Reset If S2 is not pressed during this time the user code in program memory will start executing otherwise the firmware will re enter the Bootload mode If the operation failed perform a hard Reset on the demo board by pressing S1 Save To HEX File The save to hex file function saves the data contained in the memory buffer to a file whether it was loaded from the read device or load hex file functions It only saves the data type present in the memory buffer If a hex file is loaded and does not have a particular type of memory i e that data section will not be saved in the output file All memory sections are always loaded after a r
45. f the board may no longer work as previously described It is even possible that USB connectivity may become disabled For those users devel oping USB bootloader applications it is possible that a change of device configuration with firmware loaded through a bootloader may render the demonstration board inoperable In either case it will be necessary to reprogram the board using an in circuit programmer such as MPLAB ICD 2 Should it ever become necessary to return the board to its original state it will be necessary to restore the original firmware The necessary files have been installed on the host PC with the rest of PICDEM FS USB software In MCHPFSUSB v1 2 the original hex file can be found in the directory MCHPFSUSB fw _ factory The exact location of this file may be different in other versions of the framework so refer to the MCHPFSUSB release notes if the file cannot be found To reprogram the micro controller directly via the ICD connector with the original firmware use the hex file picdemfsusb hex Users should follow the procedure appropriate for their device programmer and development environment SE E Hw n n d J R nr DS51526B page 34 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Chapter 6 Troubleshooting
46. firmware framework library and incorporates a smaller set of features and more static design The boot block can be write protected to prevent accidental overwriting of the boot program The default setting from factory has the boot block write protect option enabled Remapped Vectors Since the hardware Reset and interrupt vectors lie within the boot area and cannot be edited if the block is write protected they are remapped through software to the nearest parallel location outside the boot block 0x0800 for Reset 0x0808 for the high priority interrupt vector and 00818 for the low priority interrupt vector Remapping is simply a instruction for interrupts Users should note that an additional latency of two instruction cycles is required to handle interrupts DS51526B page 22 2008 Microchip Technology Inc Using the Demo Tool Application Memory Spaces There are four memory spaces that the bootloader can access and program Program Memory 0x0800 0x7FFF User ID Memory 0x200000 0x200007 EEPROM Memory 0 0 0000 0 0 Configuration Memory 0x300000 0x30000D The bootload also reads and displays the read only Device ID Words at Ox3FFFFE and Ox3FFFFF Note The data EEPROM is actually located in a different memory space than shown here The address range given is remapped by the bootloader to the proper memory when data EEPROM access is required FIGURE 3 4 PIC18F4550 PROGRAM ME
47. g during an application s intended normal operation When developing an application with a resident bootloader some basic principles must be kept in mind 3 5 5 1 WRITING IN ASSEMBLY When writing in assembly the boot block and new vectors must be considered For modular code this is usually just a matter of changing the linker script file for the project An example is shown in Example 3 1 If an absolute address is assigned to a code section the address must point somewhere above the boot block For those who write absolute assembly all that is necessary is to remember that the new Reset vector is at 800h and the interrupt vectors are at 808h and 818h Except for the bootloader no code should reside in the boot block area DS51526B page 26 2008 Microchip Technology Inc Using the Demo Tool Application EKAMPLE 3 1 ASSEMBLY LINKER SCRIPT FOR USE WITH BOOTLOADER Sample linker command file for 18F4550 with Bootloader LIBPATH CODEPAGE NAME boot START 0x0 END 0x7FF PROTECTED CODEPAGE NAME page START 0x800 END 0xX7FFF CODEPAGE NAME idlocs START 0x200000 END 0x200007 PROTECTED CODE PAGE NAME config START 0x300000 END 0x30000D PROTECTED CODEPAGE NAME devid START 0x3FFFFE END 0x3FFFFF PROTECTED CODE PAGE NAME eedata START OxF00000 END OxFOOO0FF PROTECTED
48. interfaces the MPUSBAPI Library is also provided to allow easy application development The board comes preprogrammed with a default demo application and is ready for evaluation right out of the box New programs can be downloaded to the PIC18F4550 microcontroller using a preprogrammed bootloader via the USB interface A PC based application the PICDEM FS USB Demo Tool facilitates the bootloading process and serves as the host application in the default demonstration 1 3 1 Benefits of Using the PICDEM FS USB Board The PICDEM FS USB demonstration board provides two simple advantages A READY TO USE DEMONSTRATION As delivered the board is ready for full speed USB operation all that is required is the proper driver included and the Demo Tool application Users can also reprogram the board with different applications included on the Starter Kit CD to evaluate other USB solutions that can be tailored to their needs AN EXPANDABLE PLATFORM Users can also expand the hardware capabilities of the board through its expansion headers and even interface it with available PICtail demonstration and evaluation daughter boards 1 4 PICDEM FS USB BOARD HARDWARE FEATURES The overall layout of the board is shown in Figure 1 1 with a list of the main features following The more complex features are discussed in detail later in this section FIGURE 1 1 THE PICDEM FS USB BOARD TOP ASSEMBLY VIEW 4
49. irmware Framework refers to the MCHPFSUSB Firmware User s Guide DS51679 which describes how to design USB solutions using the reference firmware Chapter 5 Reconfiguring the PICDEM FS USB Hardware describes how to tailor the demonstration board s hardware to your application Chapter 6 Troubleshooting discusses some common questions about using the demonstration board Appendix A PICDEM FS USB Board Technical Information provides the schematics and other technical details about the demonstration board AU UU UU Aa n DS51526B page 2 2008 Microchip Technology Inc CONVENTIONS USED IN THIS GUIDE Preface This manual uses the following documentation conventions DOCUMENTATION CONVENTIONS Description Represents Examples Arial font Italic characters Referenced books MPLAB IDE User s Guide Emphasized text is the only compiler Initial caps A window the Output window A dialog the Settings dialog A menu selection select Enable Programmer Quotes A field name in a window or Save project before build dialog Underlined italic text with A menu path File gt Save right angle bracket Bold characters A dialog button Click OK A tab Click the Power tab N Rnnnn A number in verilog format where N is the total number of digits R is the radix and n is a digit 4 b0010 2 hF1 Text in angle b
50. its port to read as 0 16 RS 232 DB9F Port A standard D shell connector along with a standard level shifter U1 provides an RS 232 serial connection to the demonstration board 2008 Microchip Technology Inc DS51526B page 9 PICDEM FS USB User s Guide 1 4 1 Oscillator and Operating Frequency The USB module of the PIC18F4550 requires a specific clock frequency input to oper ate correctly specifically 48 MHz is required when operating in Full Speed mode or 6 MHz when operating in Low Speed mode The PICDEM FS USB board uses a 20 MHz crystal oscillator as an external clock and derives the necessary internal clock frequencies from the 96 MHz PLL module The clock configuration used on the demonstration board is shown in Figure 1 2 A detailed explanation of how to set up the clock configuration is explained in Chapter 2 0 of the PIC18F4550 device data sheet DS39632 The PICDEM FS USB board is configured to run in Full Speed USB mode generating an internal system clock of 48 MHz equivalent to 12 MIPS from the external 20 MHz crystal FIGURE 1 2 PIC18F4550 CLOCK SETUP FOR PICDEM FS USB PIC18F4550 Oscillator Block Configurable 20 MH E Primary Input Prescaler Oscillator configured as divide by 5 Y1 4 MHz 96 MHz PLL Configurable requires 4 MHz 96 ka Clock Postscaler 48 MHz input configuredas CPU and di
51. n push button 2 then reset the board by pressing push button 1 Clear Screen y Ready Copyright C Microchip Technology Inc 2004 FIGURE 3 2 THE DEMO TOOL WINDOW DEMO MODE A PICDEM FS USB Demo Tool Version 1 00 nl Bootload Mode Demo Mode Select PICDEM FS USB Board M Temperature Display Toggle LEDs Data Mode mj mj 29 Potentiometer Display Temperature Resistance Ohm Clear Screen A Ready Copyright Microchip Technology Inc 2004 DS51526B page 20 2008 Microchip Technology Inc Using the Demo Application 3 4 DEMO MODE The Demo mode provides a simple interface between the board and the host system to demonstrate USB connectivity To start using the application select PICDEM FS USB 0 Demo from the Select PICDEM FS USB Board dropdown box Click the Connect button in the upper right hand corner When the Demo Tool application suc cessfully connects to the board the message USB Demo Firmware Version will appear on the left side of the status bar at the bottom of the window There are three interactive features in this mode Temperature Display There are two temperature modes Real Time and Data Logging In Real Time mode temperature data is streamed from the board to the PC continuously Both the temper ature graph and the temperature value are updated periodically All data is displayed in centigrade unit with the graph display range of 16 to 36 Th
52. nstances a single function such as the digital temperature sensor is connected to the rest of the board through more than one jumper This allows selective tailoring of the controller s 1 0 ports to any application that the user may develop Specific cases are discussed in the following sections The functions of the jumpers are listed in Table 5 1 their locations are shown in Figure 5 1 TABLE 5 1 JUMPER DESCRIPTION Number Board ID s Type Function 1 JP1 2 way Selects user controlled Reset S1 or microcontroller disable for external emulation 2 JP2 Bridge Status LED bank D1 through D4 3 JP3 Bridge USART Receive microcontroller s perspective 4 JP4 Bridge USART Flow Control RTS 5 JP5 Bridge USART Transmit microcontroller s perspective 6 JP6 Bridge USART Flow Control CTS 7 JP7 Bridge S2 user defined switch 1 8 JP8 Bridge S3 user defined switch 2 9 JP9 Bridge R20 potentiometer 10 JP10 Bridge UA temperature sensor 11 JP11 Bridge 12 JP12 Bridge 13 JP13 Bridge D7 USB bus power LED 14 JP14 JP15 2 way ICD Port Configuration JP16 2008 Microchip Technology Inc DS51526B page 31 PICDEM FS USB User s Guide FIGURE 5 1 JUMPER LOCATIONS TOP AND TRACE LOCATIONS BOTTOM ON THE DEMONSTRATION BOARD rs PICDEM FS USB n Demo Board 2904
53. on instructions The Development Systems product group categories are Compilers The latest information on Microchip C compilers and other language tools These include the MPLAB C18 and MPLAB C30 C compilers MPASM and MPLAB ASM30 assemblers MPLINK and MPLAB LINK30 object linkers and MPLIB and MPLAB LIB30 object librarians Emulators The latest information on Microchip in circuit emulators This includes the MPLAB ICE 2000 and MPLAB ICE 4000 In Circuit Debuggers The latest information on the Microchip in circuit debugger MPLAB ICD 2 MPLAB IDE The latest information on Microchip MPLAB IDE the Windows 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 These include the MPLAB PM3 and PRO MATE II device programmers and the PICSTART Plus and PICkit 1 development programmers 2008 Microchip Technology Inc DS51526B page 5 PICDEM FS USB User s Guide CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels Distributor or Representative Local Sales Office Field Application Engineer FAE Technical Support Customers should contact their distributor representative or field application engineer FAE for support Local sales offices are also a
54. poses only TABLE 1 2 USB DEVICE STATE LED STATUS USB Device State LED D1 LED D2 Detached Off Off Attached On On Powered On Off Default Off On Addressed Blink Off Configured Alternate Flashing Suspended Fast Synchronous Flashing 1 5 DEMO TOOL APPLICATION SOFTWARE Included with the demonstration board is the USB Demo Tool software This simple graphic interface allows users to monitor and control simple board features and provides the ability to reprogram the PIC18F4550 controller via a bootloader demonstration The overall operation of the host software is discussed in Chapter 3 Using the Demo Tool Application UU UU Ua Ua d amp P DS51526B page 12 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Chapter 2 Getting Started with the PICDEM FS USB Board 2 1 HIGHLIGHTS This chapter will cover the following topics Host Computer Requirements Installing the Demonstration Board 2 2 HOST COMPUTER REQUIREMENTS The USB module included on the PIC18F4550 family of microcontrollers is not specific to Windows operating system based USB platforms The module may be used to develop USB based applications intended to interface with Windows operating system Linux Macintosh computers or other types of USB capable host systems However the demonstration firmware preprogrammed on the PIC
55. rackets gt A key on the keyboard Press Enter F1 Courier New font Plain Courier New Sample source code define START Filenames autoexec bat File paths e mecl8 h Keywords asm _endasm static Command line options Opa Bit values 05 1 Constants OxFF Italic Courier New A variable argument file o where file can be any valid filename Square brackets Optional arguments 18 options file options Curly brackets and pipe character Choice of mutually exclusive arguments an OR selection errorlevel 0 1 Ellipses Replaces repeated text var_name Represents code supplied by user var_name void main void 2008 Microchip Technology Inc DS51526B page 3 PICDEM FS USB 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 RECOMMENDED READING This user s guide describes how to use the PICDEM FS USB Demo Board Other useful documents are listed below The following documents are available and recommended as supplemental reference resources MCHPFSUSB Release Notes The MCHPFSUSB release notes contain up to date information regarding specific
56. ration Board Options 31 5 3 Restoring the PICDEM FS USB Firmware 34 Chapter 6 Troubleshooting 9 1 Highlighted 5 IO e Cour ERA 35 6 2 Common PLObleMS 35 Appendix PICDEM FS USB Board Technical Information A Highights RAV REDE DU ddl ba 37 FZ BIOCK IA IM 37 PICDEM FS USB Board Schematics sse 38 Index o iens ote Salat at batt stan SEL Ead 43 Worldwide Sales and Service 2 mnnn 44 2008 Microchip Technology Inc DS51526B page iii PICDEM FS USB User s Guide NOTES DS51526B page iv 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP 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 page number The
57. rature Point 1 622 3 C MESSAGE Temperature Point 8 622 3 C MESSAGE Temperature Point 2 622 3 C MESSAGE Temperature Point 1 622 5 C MESSAGE Temperature Point 8 622 3 C Toggle LEDs The Toggle LEDs box contains two buttons used to control the status of LED D3 and D4 on the demonstration board The corresponding LED is turned on when a button is pressed and off when the same button is pressed again Potentiometer Display The Potentiometer Display reflects the current value of the potentiometer on the dem onstration board The value ranges from 0 to 10 Turning the potentiometer on the board causes the analog dial gauge and digital display to change accordingly in real time Ending Demo Mode To stop the demonstration program click Disconnect or exit the application Clicking on the Bootload Mode tab also terminates Demo mode 2008 Microchip Technology Inc DS51526B page 21 PICDEM FS USB User s Guide 3 5 BOOTLOAD MODE The Bootload mode provides a simple means of reprogramming the on board microcontroller without using an external programming device The PICDEM FS USB board is preprogrammed with a bootload program that allows designers to download and test new code through the Demo Tool application This section describes the Bootload mode as well as a brief overview of the architec ture of the bootload program An understanding on how the bootload firmware coexists with the user firm
58. rovided with the operating system it is necessary to manually install the driver before the PICDEM FS USB Demo Tool can be used When the Found New Hardware Wizard appears after plugging in the device Windows will be looking for a inf file with a USB Vendor ID VID and Product ID PID match ing the VID and PID programmed into the USB firmware When the wizard appears use the Browse feature to manually point it to the inf file located in the MCHPUSB Driver Release directory as indicated in the MCHPFSUSB release notes In MCHPFSUSB release version 1 2 the inf file will be found in the C MCHPFSUSB Pc MCHPUSB Driver Release directory The inf file a short plain text installation instructions file This file may be edited in text editors such as Notepad Among other things the inf file lets the Windows oper ating system know what driver binary files ex mchpusb sys it should use with the new hardware what text strings should appear in the device manager describing the device and what if any special registry entries should be made for the new hardware 2008 Microchip Technology Inc DS51526B page 15 PICDEM FS USB User s Guide After pointing the Found New Hardware Wizard to the inf file in the MCHPUSB Driver Release directory the rest of the driver installation process should be automatic After the wizard completes the new device should be visible in the device manager and the hardware should be ready to b
59. the option to accept the new configuration settings use the board s factory configuration settings or maintain the current configuration setting TABLE 3 1 DEFAULT CONFIGURATION WORD VALUES FOR THE PICDEM FS USB BOARD Address Register Value Comment 0x300000 CONFIG1L 0x24 Clock configuration 0x300001 CONFIG1H 0 0 Clock configuration 0x300002 CONFIG2L Ox3F BOR PWRT USB voltage regulator 0x300003 CONFIG2H Ox1E WDT configuration 0x300005 CONFIG3H 0x81 MCLR CCP2 A D configuration 0x300006 CONFIG4L 0x81 Core microcontroller configuration 0x300008 CONFIG5L OxOF Code protect program memory 0x300009 CONFIG5H 0xCO Code protect boot block EEPROM 0x30000A CONFIG6L OxOF Write protect program memory 0x30000B CONFIG6H Write protect boot block EEPROM 0x30000C CONFIG7L OxOF Table read protect program memory 0x30000D CONFIG7H 0x40 Table read protect boot block EEPROM Note Only implemented Configuration Words are listed ES P ui nnn n j J SH M e 2008 Microchip Technology Inc DS51526B page 25 PICDEM FS USB User s Guide FIGURE 3 6 CONFIGURATION CONFLICT WARNING DIALOG WITH TYPICAL DIAGNOSTIC MESSAGE 10 x Bootload Mode Demo Mode Select PICDEM FS U x Configuration data contained this
60. ts 1 Chapter 1 Introduction to the PICDEM FS USB Board 1 1 Introduction eite ee i DR HAE ERR 7 1 2 PICDEM FS USB Demonstration Kit Contents 7 1 3 Overview of the PICDEM FS USB Demonstration Board 7 1 4 PICDEM FS USB Board Hardware Features 8 1 5 Demo Tool Application Software 2 12 Chapter 2 Getting Started with the PICDEM FS USB Board 2T T 13 2 2 Host Computer Requirements 13 2 3 Installing the Demonstration Board 13 Chapter 3 Using the Demo Tool Application Did PING AS indi UR FU RR 19 3 2 Software Overview wA ie 19 3 9 tarting the PROGEAI s cie cip ducet M Rue eR uem m A M NR 20 3 4 ettet dese e i eI Re TE FE de E 21 3 5 Bootload Mode pete tie ee Lore agre Lade xe PEE 22 Chapter 4 Using the Microchip USB Firmware Framework aT Flglillghfs us AN WA 29 4 2 Overview of the Framework sse eene 29 Chapter 5 Reconfiguring the PICDEM FS USB Hardware 5 1 Highlights PE PPS 31 5 2 Configuring the Demonst
61. vailable to help customers A listing of sales offices and locations is included in the back of this document Technical support is available through the web site at http support microchip com a I a g DS51526B page 6 2008 Microchip Technology Inc PICDEM FS USB MICROCHIP USER S GUIDE Chapter 1 Introduction to the PECDEM FS USB Board 1 4 INTRODUCTION The PICDEM FS USB Demonstration Kit is designed as an easy to use evaluation platform for the PIC18F2455 2550 4455 4550 family and similar PIC18 USB 2 0 full speed microcontrollers The Demonstration Kit provides all of the hardware and software needed to demonstrate and develop a complete USB communication solution Items discussed in this chapter include PICDEM FS USB Demonstration Kit Contents Overview of the PICDEM FS USB Board PICDEM FS USB Board Features Demonstration Tool Software 1 2 PICDEM FS USB DEMONSTRATION KIT CONTENTS The Demonstration Kit contains the following items 1 The PICDEM FS USB demonstration board preprogrammed with USB bootloader and demonstration firmware 2 Astandard USB cable for use in communicating with the board 3 The PICDEM FS USB Starter Kit CD ROM containing the USB driver Demo Tool application and development tools 1 3 OVERVIEW OF T
62. vide by 2 Peripherals Clock 96 MHz Fixed 48 MHz Divide by 2 USB Clock 1 4 2 Power The PICDEM FS USB demonstration board operates at 5V Power can be drawn directly from the USB bus or from an external power supply There are no jumpers to select which power source to use Instead the power circuitry automatically selects the external power source when both power sources are available Two LEDs D7 and D8 are used to indicate the active power source D7 indicates that the board is operating in Bus Power mode D8 indicates Self Power mode i e an external power supply Note There no power conditions that will cause both D7 and D8 to light at the same time Like most USB peripherals the PICDEM FS USB board can be powered from the 5V available from the USB cable A minimum of 100 mA is always available on the bus for a device a maximum of 500 mA can be requested and used if available A barrel type power supply connector 2 5 mm diameter is also provided to run the board from a 9 18 VDC power supply A transformer is not supplied in the kit because every example included will run from USB bus power DS51526B page 10 2008 Microchip Technology Inc Introduction to the PICDEM FS USB Board A USB host may send a query to a USB device to determine if it is currently self powered Without an ability to sense the output of the 5V regulator VR1 there would be no way to determine the status of
63. ware is important in developing a successful end application 3 5 1 Bootload Mode Entry To start using the application press and hold S2 while resetting the board pressing and releasing 51 The entry condition on the PICDEM FS USB board and the provided firmware is determined by the status of the switch button S2 which is checked once after each Reset If the button is held down during a Reset the microcontroller enters the Bootload mode otherwise it starts executing user code from address 0x0800 Note Even if the Demo Tool application is running in Bootload mode a simple reset of the board pressing S1 will not cause the board itself to enter Bootload mode After the Reset select PICDEM FS USB 0 Boot from the Select PICDEM FS USB Board dropdown box When the Demo Tool application successfully connects to the board the message USB Bootload Firmware Version x x will appear on the left side of the status bar at the bottom of the window 3 5 2 Memory Organization Program Memory Usage Figure 3 4 shows the memory map of the PIC18F4550 The first 2 048 bytes of pro gram memory are reserved as the boot block which is utilized almost entirely for the bootloader firmware The bootloader is a self contained program with its own USB driver firmware USB descriptor set bootload command interpreter and bootload function handlers The USB driver firmware used with the bootloader is a modified version of the Microchip USB

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