Introduction Installing AVR Studio and AVR-GCC
Contents
1. The STK500 Board Starting from the bottom first there is a row of eight pushbutton switches each of which has a small LED lamp above it These can be connected to the microcontrollers using the array of connectors just above There is then a large white area which is where the AVR chips to be programmed are inserted Usually a STK500 comes with a AT90S8515 8515 for short chip mounted in the large socket on the right The green area at the top contains the programming electronics and the connectors for power and communications AVR Freaks STK500 Getting Started By Sean Ellis The STK500 Package This page gets the STK500 powered up safely and checks that both it and the supplied AVR microcontroller are working correctly Checking Board Options The STK500 is a sophisticated piece of equipment and as such has several different modes of operation These are selected by connecting or leaving unconnected specific sets of pins on the board i T i 2 pin 3 pin i Jumper Jumper Closed Open Pins 2 3 Pins 1 2 pin 1 jumper on closed closed marked one pin Jumper Positions To connect a pair of pins a small connector is pushed onto them These connectors are commonly referred to as jumpers A pair of pins is said to be closed when a jumper is pushed on between them and open if not It is often common practice to push the jumper onto just one pin for an open condition so that it doesn t get lost The picture above sho2. This you will need to save somewhere more permanent suggest that you navigate to your My Documents folder and make a new folder under that called AVR and save the user guide in there This filename maybe different for later versions of the AVR Studio aStudio4b460 exe for 4 12 This filename maybe different for later versions of the User s Guide AVR Freaks STK500 Getting Started By Sean Ellis Installing AVR Studio This page installs the AVR Studio software The Installation Process Find the install file you saved to disk in the previous step and run it by double clicking on it This starts the install process The process itself is quite quick and actually takes less time to do than it does to read this guide WinZip Self Extractor astudio3 exe To unzip all files in astudios exe to the specified i Unzi folder press the Unzip button alls ll A Run winzip Browse Close es without prompting About Abou Help dd Unzipping the files The first stage of the install unpacks all the files from the installer to a temporary location The dialog box that appears suggests a temporary folder to use during this process but we ll need to find this folder later so it is easier just to type C Temp as the folder to use Once this is done click on the Unzip button to continue Assuming everything went well a small message box appears reporting the successful unpacking of the files to C Temp
3. In the text area at the bottom you should see a message indicating that your STK500 has been detected and showing what revisions of hardware and software are present If not ensure that the power to the STK500 is on and that the serial cable is connected to the correct port both on the STK500 and the computer and then close the dialog and try again 22 AVR Freaks STK500 Getting Started By Sean Ellis Assuming the STK500 is detected the first thing we need to do here is to tell the programming software what device it is going to be programming Select AT90S8515 from the Device drop down STK 500 Program Fuses LockBits Advanced Board Auto Device AT 9059515 Erase Device 4759052545 ATSUS 4435 3 ATSICAA A fore Programming BT ane 515 ter Programming AT mega 61 AT megalb3 ATmegase3 ATmegal 03 AT megal 26 No device selected Detecting STESU0 found on Cki Getting revisions HY O02 SWW bajor O07 S Minor O07 OF Choose your device Before programming it is a good idea to erase any program already in the device Click the Erase Device button If everything is OK then the text area at the bottom of the dialog should indicate that everything is OK If not dismiss any error dialogs and double check your wiring again Warning M Problems occured when executing commandis Please check the history window Click Help to get more information on wha
4. The AT90S8515 data sheet which is a comprehensive reference to the architecture of the 8515 e The AVR Instruction Set Reference which as it suggests is the definitive reference for assembly language 25
5. in brackets Here it is 1 indicating that the error is in the very first line of our program AVR Freaks STK500 Getting Started By Sean Ellis The rest of the line details the error and indicates that it is not our program that is at fault but the assembler cannot find the file called 851 5def inc file which was specified on the first line This file as well as corresponding files for all the different AVRs is included with the assembler but since it s not actually in our project the assembler does not know where to find it We must copy it into our project folder Close the Project Output window since it won t be needed for a while All of the inc files for all of the possible AVR devices are initially installed with AVR Studio into the folder C Program Files Atmel AVR Studio Appnotes Using Windows Explorer or by exploring from My Computer copy the file 8515def inc from this folder to our project folder C Projects LEDO Back in AVR Studio we must add this file to our project It s not an assembler file per se so we will add it to the Other Files group In the project window right click on Other Files and select Add File from the pop up menu EE Project LEDO T arget Default ha ES Target Default 3 Assembler Files ER it ledd as Project settings Create New File Ctrl M 4dd Group N Targets d Assemble F7 Adding a file Select 8515def inc from the file selection di
6. output instructions in a form that AVR Studio s built in AVR simulator software can deal with If as we do we want to run the program on a real AVR we must change the output format for the assembler From the Project menu select Project Settings The Project Settings dialog box appears From the Output File Format drop down select the option labeled Intel Intellec 8 MDS Intel HEX This is the name of the file format that the STK500 programming software understands known for short as hex format Click OK 20 AVR Freaks STK500 Getting Started By Sean Ellis AYR Assembler Options Asembler location OK C Program Files 4QtmelvavA Studioravrasmdz ere A l Cancel Assembler entry file C Projects ledD led0 asm E Code generation Output file format Object format for AWA Studia e wrap relative jumps Object format for 4A Studio et edenn Generic l Intel Intellec S MOS Intel Hex st Motorola 5 Record Project settings Re assemble the program by pressing F7 The output window should appear with no errors as before We now have an assembled file ready for transfer into the AVR on the STK500 Running the Program This page shows how to download a program to the STK500 and run it Downloading the Program In order to run the program we need to transfer it to the STK500 and to do that we need to connect the programming electronics to the AVR on board First ensure power to the STK500 is off W
7. the File menu and select Save This will save the file to the disk Assembling the Program Let us now try assembling the program To do this either pull down the Project menu and select Assemble or press key F7 This submits the program we just wrote to the assembler which tries to interpret it and convert it to raw machine instructions The assembler itself opens a new window to inform you of what happened In this case it is not good news The assembly process failed The last line shows a summary of what happened and as it says there was 1 error So am presenting a faulty program Have just been stringing you along all this time Not quite We will have to read through the rest of the output to understand why lee Project Output 0 AYRASM AYR macro assembler version 1 54 Nov 42001 16 02 15 Copyright 0 1995 2001 ATMEL Corporation Assembling C Projectsiled0iled asm C FProjectsiled ied asmi1 Include File 8515def inc not Found Assembly complete with 1 error 3 The Project Output window The first two lines are just the copyright information for the assembler software itself Then there is a line of information telling us what the assembler is doing assembling our file c projects ledO led0 asm However the next line is the informative one Again it tells us which file was being assembled when it found the error c projects ledO ledO asm and it also includes the line number it was assembling
8. 0 to PBO SW1 to PB7 and so on lt is a good idea to do three things when connecting cables to headers First ensure power is off You might make a temporary connection due to a shaky hand but that will not matter if there is no power going into the board Second check that the cable is connected the right way round Third check that the cable is connected the right way round once again Whilst you may notice that steps two and three are very similar it really does not hurt to be sure To connect each set of two headers use one of the short 10 pin to 10 pin jumper cables supplied To ensure that the cables are not twisted which would connect the wrong pins ensure that the red stripe is on the left in both cases AVR Freaks STK500 Getting Started By Sean Ellis PORTB ee header SWITCHES T Lat MeL eae LEDS header Se Sais _ amp Q i header Connecting the cables l Il say this one more time it s very important to ensure that cables are attached the right way round as putting them in the wrong way round can damage the STK500 and or the microcontroller inserted into it As an aside you may be wondering why we re connecting ports B and D when there are ports A C and E available too The overriding reason is that the test program is written to use these ports which is because they are physically the easiest ones to connect on the board They are also present on almost all AVR devices With the switches and LEDs connec
9. AVR Freaks STK500 Getting Started By Sean Ellis Introduction Assumptions A certain amount of knowledge is assumed including the ability to launch programs navigate the Windows file system to create folders and to copy files from one folder to another A basic knowledge of PC hardware is also required sufficient to connect a cable to a free serial COM port Installing AVR Studio and AVR GCC This page gets us familiar with the STK500 package contents What s In The Box The first thing to do is to unpack the items from the box onto a clean flat work area As you open the box on top is a list of the contents which may differ slightly from those listed here For example some distributors may include an additional sample microcontroller gt The STK500 Box and Contents There should be a user guide booklet which includes reference information about the board as well as its own Getting Started guide Section 2 This set of web pages reiterates much of the information in the Getting Started section so you can use either this page or the User Guide to get up and running according to your own preference Under the paperwork is a CD ROM which contains a snapshot of the Atmel website including all the information and data sheets for AVR microcontrollers and the AVR Studio software which you will need later AVR Freaks STK500 Getting Started By Sean Ellis Under this is the main board itself i
10. Click on the OK button to continue This takes us back at the unpacking dialog Click on the Close button to finish this part of the installation This has unpacked all the files we need to install into a new folder under C Temp called cdrom Presumably because this installation is also destined for future versions of the Atmel CD Select the cdrom folder and double click on the SETUP EXE program in order to run it AVR Freaks STK500 Getting Started By Sean Ellis Welcome to the AYA Studia Setup program This program will install AWA Studio on your computer Ik is strongly recommended that you exit all Windows programs before running this Setup program Click Cancel to quit Setup and then close any programs you have running Click Next to continue with the Setup program WARNING This program i protected by copyright law and International treaties Unauthorized reproduction or distribution of this program or any portion of it may result in severe civil and criminal penalties ard Will be prosecubed to the maximum extent possible under law Installation splash screen You will be presented with the installer s introduction screen This advises you to close all other Windows programs before continuing with the installation and so this is definitely a good idea Once the installer is the only thing running click on the Next button The next step is the lawyer s favorite dialog box the one that contains the softwa
11. al later on For now we can treat it as a black box that stands in place of any assembly language program AVR Freaks STK500 Getting Started By Sean Ellis Creating the Projects Folder AVR Studio organizes all the files and settings for a single program as a project which resides in its own folder on your hard drive AVR Studio itself will create a new folder for each project but will not create the folder that the project folders themselves are stored in For example if you want to put your project in C Projects LEDO then AVR Studio will quite happily create the LEDO folder but only if the folder C Projects already exists If you do not have an existing folder to put all your projects in create one called C Projects Creating the Project Our ultimate goal is to type the program into the computer feed it through the assembler and download it to the chip on the STK500 To do this we will create a new project in AVR Studio With the housekeeping out of the way now we can start the AVR Studio software Once the splash screen has disappeared you should be left with a blank work area and a set of menus and toolbars along the top much as you would expect from a Windows application To create a new project pull down the Projects menu and select New The Select New Project dialog box will appear It is here that we get to set some of the most basic options for our project Select new project Project name LEDO Locat
12. alog and click Open If you cannot see it choose All files from the Files of type dropdown first 8515def inc should now be visible under the Other Files group Notice that when we created the Original ledO asm file it was not placed under the Assembler Files group by default so while we are assigning things to groups we can do it now Simply drag and drop the file into the Assembler Files group AVR Freaks STK500 Getting Started By Sean Ellis le Project LEDO Target Default 7 Ta Other Files X Fi jeda azm 8515def inc ledO asm Drag and drop led0 asm Let us check if this actually worked Assemble the project again using the menu Project Assemble or press F7 The Project Output window reappears and with a bit of luck this time the bottom line has a very happy message indeed Assembly complete with no errors We have just successfully assembled our first program EE Project Output a Assembling C Projectsiled0iled asm Including 651 Sdef inc Program memory Usage Code 3S words Constants dwidb O words Unused O words Total S words Assembly complete with no errors be Assembly successful If it does not say this recheck that led0 asm is exactly as printed above and that 8515def inc is indeed in the right folder Before we can run the file there is one final adjustment that needs to be made to the project By default the assembler is set up to
13. e are going to use the simplest form of programming serial programming so we must connect the appropriate serial programming headers together First find the two 6 pin headers near the rear end of the 8515 chip on the right labeled ISP6PIN and SPROG3 SPROGS is connected to the appropriate pins on the 8515 which is why it has a red background and so does the 8515 socket Using the 6 pin cable that came with the STK500 connect these two headers together ensuring that the cable is not twisted 21 AVR Freaks STK500 Getting Started By Sean Ellis sll a ninina Teeth eyes H i y u Eaa p i Serial Cable to PC ISP6PIN Header SPROG3 Header Ea Q E m Connections for downloading a pE i Next using the serial cable supplied connect the leftmost serial connector labeled RS232 CONTROL to a spare serial port on your PC Most PCs have at least one suitable 9 pin serial port on the back panel often labeled COM1 or COM2 Once this is connected switch on the STK500 and we are ready to attempt a programming session Back in AVR Studio click on the AVR chip on the toolbar to start the programming software AR Studio LEDO File Edit Project Debug Greakpoints Trace amp triggers Watch Options lale kH ES oe a Basai k STKSOO AVRISP ITAG ICE Alt 8 Programmer icon E Project LEDO The STK500 dialog box appears
14. ect The Program The simplest AVR program which has a visible output just lights one of the LEDs on the STK500 board The example program here lights LEDO the rightmost in the row of eight LEDs above the pushbuitons on the near end of the board and then halts A close up of LEDO The actual detail of how the program works is not particularly relevant at this stage like the program already loaded into the AVR in a new STK500 it is used to demonstrate the process of creating a program We cannot easily write the program directly in a form which is downloadable onto the chip Why not Because programs written directly for the chip itself are the next best thing to incomprehensible For example here is the actual code we are going to download onto the chip B89A C099 FFCF Each 4 digit code represents a single instruction that the AVR can carry out This is easy for simple computers to deal with but a nightmare for humans Obviously we need a better way of dealing with this A program which converts a more readable form of each instruction into these numeric codes is known as an assembler and the AVRAsm assembler is included with AVRStudio Our assembler listing is pretty small only 5 lines long and only 3 of those actually translate into instructions Here it is include 8515def inc Org U sbi DDRB 0 cbi PORTB 0 rjmp halt We will go through this program in more detail in the basic assembly language tutori
15. fg r rs i Corredi 8515 Orientation AVR Freaks STK500 Getting Started By Sean Ellis Testing the STK500 Board Before we connect the board to anything else it is best to test it in isolation This will verify that the board is operating correctly The installed 8515 comes with a test program already programmed into it which is very handy But before we can run it we need to connect some of the outputs from the microcontroller to the LEDs and switches on the board On the right hand side just above the switches is a group of 10 pins labeled LEDS These need to be connected to the corresponding group of 10 pins just above and to the left labeled PORTB In general a group of pins arranged in this way and intended for a cable to plug into them is known as a header so these are the LEDS header and the PORTB header On the left are two similar headers labeled PORTD and SWITCHES PORTB and PORTD and SWITCHES Close up of headers One thing to notice is that each pin is individually labeled on the LEDs header we have LEDO to LED7 GND and VTG for the LEDs and on PORTB we find PBO to PB7 GND and VTG It is important that we connect the headers up in such a way that LEDO connects to PBO LED7 to PB1 and so on Most particularly we must ensure that the two GND pins connect and that the two V7G pins connect as these are the pins which carry the main power supply Similarly to connect the switches we should connect SW
16. ion C Projects led0 el Project type AVA Assembler Genernc drd party C compiler cancel gt The Select New Project dialog box For this project we will set its name to LEDO and where it is to be stored will be C projects led0 We also need to indicate what type of project it is In this case we have a choice of AVR Assembler or Generic 3rd Party C Compiler Since this and all the other projects later in this series are assembler projects we should select AVR Assembler for this one When all is correct click OK and the project will be created We should now have a view of the project in the Project window This window has two folders in it labeled Assembler files and Other files Both of these folders are empty at the moment AVR Freaks STK500 Getting Started By Sean Ellis because we haven t actually created any files to go into them yet this is just a view onto the project folder EE Project LEDO Miel x Target Default esl Target Default The Project window 16 AVR Freaks STK500 Getting Started By Sean Ellis Assembling a Program This page explains the various steps in editing and assembling a simple program Creating the Program File To create a new file pull down the File menu and select New Text File The Create New File dialog will appear prompting for the name of the file to create Create new file Marne led asr Location C Projects ed0 W Add t
17. ly available for powering small electrical items and you should be able to get one at any consumer electronics shop Polarity is not important since the STK500 is designed to accept either polarity of connector AVR Freaks STK500 Getting Started By Sean Ellis A Typical Power Supply In later steps we will be connecting the STK500 to a PC so you should have one of those as well The Atmel AVR Studio software requires a PC Pentium or above recommended with at least 16MB of RAM 7MB of hard drive space free Windows 95 98 NT or 2000 and a free serial COM port This description covers virtually any new PC compatible computer bought in the last 5 years or so Note The current AVR Studio release is version 4 12 which you can obtain from the following link http www atmel com dyn resources prod_documents aStudio4b460 exe AVR Freaks STK500 Getting Started By Sean Ellis The Board Itself If you place the board so that the row of pushbutton switches is towards you and the power and serial connectors are away from you we can take a look at the basic layout of the board Power Serial Port Second Port AAE Power SWIED Programming Electronics Reset Switch L p mg ee et ae Jumpers and Headers Target AVR Sockets eee ee SESS 8885882 al L de an i w pe ieii om TATE ga ttt a BEARN pogin pore T Headers i a ai 1 N LL LE a 5 h Laz E oor a a a m LEDs and J g g Q Switches
18. n an anti static bag It is important to remember that modern electronic devices can easily be damaged by static electricity so try to ensure that you reduce static whenever you are handling the board or the AVR chips that fit into it Note lt might be a good idea to purchase an anti static wristband from your local electronic component store aS a means of reducing the possibility of static damage These bands have a metal conductor that makes contact to the user s wrist A wire connected to the conductor usually with an alligator clip on one end allows you to connect the wristband with a power supply ground or computer case as a ground Along with the board are some bags containing grey and colored jumper cables for connecting various parts of the STK500 together These come in 10 pin 6 pin and 2 pin varieties 10 pin 2 rows of 5 6 pin 2 pin 2 rows 1 row of 3 of 2 The Different Cable Types Not shown here is the supplied serial cable which is about 1 5m long with a 9 pin connector on each end and is for connection to the PC There is also a bare power cable with a suitable power plug on one end for use in case your power supply does not have the correct connector to power the board Additional Items In addition to the contents of the STK500 starter kit itself you will need a suitable power supply This should be able to supply at least 500mA at 10 15v DC and be fitted with a 2 5mm power plug These are common
19. o always give my permission to restart immediately Otherwise run the risk of forgetting to do so and getting problems because of it If you choose the Restart Now option clicking Finish will restart your computer and finish the installation If you choose the Restart Later option clicking Finish will mean that the final finishing touches to the installation will only happen next time you restart so you will have to restart manually before proceeding to the next step Running AVR Studio If everything has gone well with the install remember to restart the computer if you haven t already you should have a new folder in your Start menu which if you accepted the default name will be called Atmel AVR Tools Inside this is a shortcut to the AVR Studio program Click it to start AVR Studio WR Studio O x File Project wiew Tools Help le Mell ao 2s ee 2 fe oo oe ED Copyright 1996 2001 Eems Atmel Corporation SR ES bees Bhar SER T AVR Studio Running ce AVR Freaks STK500 Getting Started By Sean Ellis The initial splash screen will appear and the AVR Studio development environment is presented This is a bit bare to start with since we haven t created anything yet Almost all the icons in the toolbars are greyed out since they have no effect until we load or create a project to edit Creating a Project This page gets us started with the AVR Studio software creating a very simple example proj
20. o project OF N Cancel The Create New File dialog box The name we want is led0 asm with the asm extension signifying that it is going to be an ASseMbler file The location field should already be set to the current project folder C Projects ledO The Add to project check box should be checked since we do want to add this new file to the project Once all this is correct click OK A new empty window opens entitled led0 asm displaying the contents of the new file It is blank since we haven t written anything into it yet You may also notice that a new item has appeared in the Projects window also entitled ledO asm Into the new window we need to type or cut and paste the assembly language program we wrote above lee ledO asm include 8515def inc Jorg bi DDRB 0 chi PORTE 0 romp halt The led0 asm file window AVR Freaks STK500 Getting Started By Sean Ellis The editor software within AVR Studio recognizes the asm extension on the file and realizes that this is an assembly language program In this case it will highlight particular things within the program using different colors This is perfectly normal and is designed to give additional cues to the user while writing programs Here is the program again in black and white for cut and paste purposes include 8515def inc Jorg sbi DDRB 0 cbi PORTB 0 rjmp halt Always save work regularly To save the file pull down
21. re license am not a lawyer and so cannot advise you on whether this license suits you or not but the bottom line is that if you don t click the Yes button to accept the terms of the license you don t get to play with the software Let s assume you click Yes and carry on to the next screen Choose Destination Location Ea Setup will instal AYA Studio in the following Folder To install to this folder click Nest To install to a different folder click Browse and select another folder ou can choose not to install AVA Studio by clicking Cancel to exit Setup Destination Folder C Program Files 4tnelay A Studio Browse Cancel Choose destination folder The next dialog in the sequence suggests a default folder in which to install AVR Studio The suggestion seems like the right place to put it to me but if you disagree you have the chance to change the folder by clicking on the Browse button Once you are happy click Next to continue We re nearly there s12 AVR Freaks STK500 Getting Started By Sean Ellis The next screen asks for the name of the folder which will appear in the start menu You have the chance to edit this name if you don t like the default Once you are happy click Next At this point the actual installation of the files into their final locations takes place which may take a few seconds The final screen asks for permission to restart the machine In general am very forgetful s
22. t may have caused the problems Communications problem Double check wiring To program the device we must tell the software which file to send to it To find the file click the a browse button in the Flash area to the right of the Input Hex File space The program is stored on the chip in so called flash memory 93 AVR Freaks STK500 Getting Started By Sean Ellis A file dialog appears which should be in the project folder showing the file ledO hex Select this file and click Open to open it Now the moment of truth Still in the Flash area of the dialog box click the Program button Program Fuses LockBits Advanced Board Auto Device AT 9059515 Erase Device Programming mode fe SP W Erase Device Before Programming C Parallel High Voltage Serial W Verity Device After Programming Flash E f Input HE File k ma eiea en A A aE Program Yernty Read EEPROM a f Input HE File r Prograrn Werky Read Setting device parameters senal programming mode OF Entering programming mode OK Erasing device OF Leaving programming mode OK El Program the device You may notice some activity on the leftmost LEDs while the AVR is being programmed this is normal and is due to the signals for programming being carried on pins PB5 PB6 and PB7 which we have connected to the LEDs Once this settles down and the programming is finished the actual program
23. t version at time of writing is about 8 6 megabytes or just under an hour s download on a typical modem connection Obtaining AVR Studio Atmel are continuously upgrading AVR Studio so it is a good idea to work with the latest version Although there is a version of AVR Studio included on the Atmel CD that comes with the STK500 it is best to take the time to download the latest version either from Atmel s website or here on AVRFreaks net On AVRFreaks net the latest version is available in the Tools section of the site am not going to link directly to the downloads since the download page for AVR Studio always contains links to the very latest version You can also find this page by selecting the Tools tab then selecting Assembler from the left hand list of tool categories then selecting AVR Studio from the resulting list of links To begin with you will want to download two files from the Tools page the AVR Studio Install File astudio3 exe and the AVR Studio 3 User Guide doc1019 pdf7 The AVR Studio install file is about 6 megabytes in size which translates as about 30 minutes download time on a typical dialup connection To download just click on the link and choose Save to disk when prompted You only need this file on disk temporarily so choose a temporary folder such as C Temp to save it into You will also need to download the user guide This is much smaller about 173 kilobytes well under 2 minutes download time
24. ted did mention to double check the orientation of the connecting cables we are ready to power on First ensure that the power switch on the STK500 is off the toggle should be in the position farthest from the edge of the board Power switch and connections Plug you power supply into the wall switch it on if it has a switch most wall mounted power Supplies like mine do not and connect it to the power socket at the top left of the board Are you sure your cables are all connected the right way round If so switch on the power switch With the switch on three small LEDs should light immediately The red one next to the power switch indicates that power is available to the STK500 itself The green one at the top left of the central white area indicates that power is getting to the installed microcontroller and the green one on the right near the top indicates that the programming hardware is ready to go AVR Freaks STK500 Getting Started By Sean Ellis LEDs should blink when switch SWO is pressed The test program is set to respond to the push button switches at the bottom of the board Press switch SWO at the right briefly If everything is OK most of the LEDs should light This is a good indication Press and hold SWO and the LEDs will start flashing with each LED flashing half as quickly as the one on its immediate right This is known as a counting pattern Each switch has a different effect on the LED pat
25. terns SWO counts down SW 1 counts up SW2 moves the current LED pattern right SW3 moves the current LED pattern left SW4 lights every LED which is dark and vice versa SW5 same as SW4 but only as far as the rightmost dark LED SW6 swaps LEDO with LED4 LED1 with LED5 LED2 with LED6 and LED3 with LED 7 SW7 does nothing If everything went well congratulations You now have a working and healthy STK500 The next page will take you through installing the software Otherwise Troubleshooting Here are a few troubleshooting suggestions Nothing Happens When Switch On The most obvious thing to check is that the power supply is turned on and giving power If you have a voltmeter check that the voltage coming out of the power supply is sufficient to drive the STK500 board 10 to 15 volts and that the current rating is sufficient 500mA or above The Power Lights Are On but Nothing Happens Otherwise Check that you have connected the LED and Switch jumper cables correctly paying attention to the alignment of the pins and the polarity of the cables Check that the jumpers on the board are in the default positions Check that there is actually a microcontroller installed in the board There Are Some LEDs On But They Don t Do What Expect The chances are that if you are not the first user of the STK500 the microcontroller has been reprogrammed erasing the test program supplied by default In this case you will have
26. to progress to the next page install the programming software and reload the test program AVR Freaks STK500 Getting Started By Sean Ellis Setting Up The STK500 AVR Studio is a free suite of Windows software from Atmel that enables you to create edit and assemble programs for the AVR microcontrollers and then transfer them to real AVR chips installed in the STK500 board and run them This page gets us ready to install the AVR Studio software It is assumed that you have set up and checked your STK500 evaluation board as outlined in the previous pages Requirements The Atmel AVR Studio software requires a PC Pentium or above recommended with at least 16MB of RAM 7MB of hard drive space free Windows 95 98 NT or 2000 and a free serial COM port This description covers virtually any new computer bought in the last 5 years or so In order to read or print the user manual you will also need appropriate Adobe Acrobat viewer software This is distributed on the Atmel CD that came with the STK500 so assuming that your CD ROM drive is drive D you can install it by running the file D adobe windows ar40eng exe that cryptic filename is short for Acrobat Reader 4 0 English This version of the software should work fine with the user manual However if you don t have access to the Atmel CD the latest version of the Acrobat reader is available for free download from Adobe themselves at their Acrobat Reader download page The curren
27. will start and light the rightmost LED You can now close the programming dialog The text area at the bottom of the programming dialog should also indicate that everything worked correctly Erasing device OK Programming FLASH using block mode 100 OF Reading FLASH using block mode 100 OF il FLASH contents i equal to tile OF Leaving programming mode OK Programming succeeded 24 AVR Freaks STK500 Getting Started By Sean Ellis Running the Program If LEDO is lit then the program was downloaded and run successfully The light of achievement Further Qualification The two lines containing the constant value 0 can be changed to use any value from O to 7 although both lines must use the same value For each value from 0 to 7 the corresponding LED will then be lit For example the following will light LED4 instead of LEDO include 8515 def inc org sbi DDRB 4 cbi PORTB 4 rjmp halt Try editing the program to light different LEDs to get familiar with the sequence of events To re open a file which has been closed double click on it in the project view A reminder after editing the program you will need to save it re assemble it and download it to the board again Recap You should now know how to use the AVR Studio software to create simple AVR projects edit assembly language assemble programs and download them to the STK500 Useful resources for next steps include e
28. ws a typical two pin jumper in a closed and open position and a three pin jumper closed between pins 1 and 2 or 2 and 3 three pin jumpers always have pin 1 marked The STK500 should come with all its jumpers set up to select a sensible default set of options but it is worth checking that they are indeed in this default configuration before we go any further The jumpers are located at the top of the white area on the left and are labeled from the outside in VIARGET AREF RESET XTAL1 OSCSEL and BSEL2 These should be in the state indicated in the picture and are also printed on the underside of the board for easy reference The defaults are VTARGET closed RESET closed XTAL1 closed OSCSEL closed between pins 1 and 2 BSEL2 open See picture on the following page for jumper locations AVR Freaks STK500 Getting Started By Sean Ellis and Headers LEDs and Switches Default Jumper Positions One other thing that is worth checking is that the pre installed AT90S8515 microcontroller is present and inserted the right way round It should be a large 40 pin chip in the large socket on the right of the board with the notched end toward the row of switches If you have a brand new STK500 then this is very unlikely to be missing or misaligned Tayy 4 it ATS0S8515 pr EE i Ly Micro i En 5 ial i F a 2 J controller a ken a i E ip i p in i i Ss Notched End oe e oe i Ee EF E
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