Home

Section 4. Application Programming

1. l ia J ms vas Od IML y Figure 4 36 Context diagram of the data acquisition system formed with a myTWI Temperature Sensor an STK500 evaluation board and a host PC also acting as a web server 4 4 2 Preparing the Host for Web Access Some sort of database installed on the server is needed to store any data acquired from the STK500 This data can then be made available to remote users via a website such as the one given by the HTML and PHP code in Appendix A 2 2 4 The website software will query the database for the information requested by some remote user For simplicity this project uses a flat text file txt rather than a database It is possible to retrieve and store data from the STK500 via HyperTerminal HyperTerminal receives data via RS 232 serial communication and then can save them into a text file However the data will only be saved once the HyperTerminal session is closed This poses a problem since a networked DAQ system should allow for the host to continuously Vincent A Rosa Florida Gulf Coast University Page 33 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor acquire data while the target system the STK500 in this case is running A customized serial communication utility can be developed to overcome this problem The serial communication program host_serial_com cpp in Appendix A 2 2 2 was produced for a Windows platform using the Win3
2. Figure 4 35 Screenshot of the HyperTerminal pop up window that appears when an exiting an unsaved HyperTerminal session This concludes how to execute the test application for USART communication and the myTWI to STK500 DAQ application Appendix section A 3 Troubleshooting covers some of the common errors that arise while carrying out the instructions provided in this section Try editing the code used in this section to have one push button switch correspond to one LED say SW3 with LED3 where the LED will turn on or off when this button is pushed Then try adding some code that will send a message to the host via USART when a different button is pushed say SW7 It is important to know that PA3 controls SW3 and that PA7 controls SW7 since PORTA is connected to the SWITCHES header Similarly PC3 controls LED3 since PORTC is connected to the LEDS header Also note from the provided sample programs in Appendix section A 2 that a carriage return r must be sent when starting a new line n in HyperTerminal otherwise the data sent will be skewed Vincent A Rosa Florida Gulf Coast University Page 31 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 4 Remote Access 4 4 1 Networking an STK500 Web accessed data acquisition and remote programming are two aspects of networking that can be achieved using an STK500 evaluation board Web accessed data acquisition includes
3. SPI Control Register SPCR of section Serial Peripheral Interface SPI S CodeVisionAVR C hip Programmer STK5SOO AVRISP File Edit Program Read Compare Help Chp ATmegaSS15L bal wy Program ll CP Reset Chip SCK Freq 230400 y Hz FLASH EEPROM Start 0 h End 345 h Start 0 h End 1FF h Checksum 1930h Chip Programming Options FLASH Lock Bits No Protection Programming disabled Programming and Verification disabled Boot Lock Bit 0 BOI 1 B02 1 C B01 0 BO2 1 C BO1 0 BO2 0 B01 1 B02 0 Boot Lock Bit 1 B11 1 812 1 B11 0 B12 1 O B11 0 B12 0 O B11 1 B12 0 Checksum FE 00r Program Fuse Bit s C CKSELO 0 CKSEL1 0 M CKSEL2 0 M CKSEL3 0 M SuTo 0 M suti 0 BODEN 0 C BODLEVEL 0 BOOTRST 0 C pooTszo 0 C BooTsz1 0 EESAVE 0 C CKOPT 0 M WDTON 0 rT 58515C 0 Check Signature V Check Erasure Preserve EEPROM Verify Figure 4 25 Screenshot of the CodeVisionAVR Chip Programmer tool Vincent A Rosa Florida Gulf Coast University Spring 2009 Page 23 of 50 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 2 2 6 Goto the Program menu within the CodeVisionAVR Chip Programmer window and select Erase Chip as seen in Figure 4 26 This will erase the flash memory of the target AVR device in this case the ATmega8515L It is good practice in AVR development to always erase
4. These settings Vincent A Rosa Florida Gulf Coast University Page 28 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor should match those given by Figure 4 31 for this example Click OK to proceed If an error occurs at this point refer to Troubleshooting section A 3 of the appendix x COM3 Properties Port Settings Bits per second 115200 v Data bits 9 w Parity None v Stop bits 1 Ww Flow control None v Restore Defaults conch Cat Figure 4 31 Screenshot of the COM port settings window used by HyperTerminal to establish how to receive or send data via serial using the RS 232 protocol 4 3 5 Push the RESET button on the STK500 board shown in Figure 4 32 to restart the program installed in the flash memory of the ATmega8515L Now push one of the push button switches The results from these actions should yield a HyperTerminal window that looks like the one in Figure 4 33 If the results are not correct or seem to be garbled refer to Troubleshooting section A 3 of the appendix the firmware might need to be updated 16 Vincent A Rosa Florida Gulf Coast University Page 29 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor ae i SS mg m gi Th m FHIR SILI Figure 4 32 Picture emphasizing the RESET button on the STK500 evaluation board 4 com3_STK500_DAQ HyperTe
5. broadcasting data acquired from the STK500 board via the Internet Remote programming includes allowing a remotely located user to program the STK500 via the Internet Both of these networking aspects can be fulfilled by using a website as the user interface The DAQ system formed in section 4 1 3 can be expanded into a web based system illustrated by the context diagram in Figure 4 36 An example website for this system that runs on the host PC web server is given by the HTML and PHP code provided in Appendix section A 2 2 The customized serial program and batch file presented in Appendix A 2 2 also run on the host server and they are the key components used by the given website to achieve web based DAQ and remote programming respectively The sample website is hosted using IIS Internet Information Services on the same Windows PC that serves as the host for the STK500 board However the web server is not required to be the same machine as the host PC How to establish a web server goes beyond the scope of this document but the core components used to develop a networked STK500 are further explained in sections 4 4 2 and 4 4 3 Vincent A Rosa Florida Gulf Coast University Page 32 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor myi WI Atmel Host Computer LM75 STK500 l Web Server Temperature Software Sensor System 1 5 13 14 Pinout
6. Device parameters loaded Programming mode entered Device erased FLASH input file read Programming FLASH FLASH programmed Reading FLASH FLASH read FLASH verified successfully Programming mode left onnection to STK566 U2 closed stk560_example gt _ gt Figure 4 20 Screenshot of a CMD session where programming an STK500 was successful 4 2 2 Using CodeVisionA VR Evaluation to Program the STK500 The following procedure instructs the user how to program one of the AVR devices installed in a target socket on the STK500 PCB The AVR device being programmed within this procedure is the ATmega8515L MCU If CodeVisionAVR is not already opened refer to instruction 4 1 1 1 to open the CodeVisionAVR Evaluation IDE 4 2 2 1 Ifa project is not already opened within the CodeVisionAVR IDE go to the File menu select Open go to the desired directory that contains a CodeVisionAVR project file prj and open this project as in Figure 4 21 Be sure that all project files have already been built as in instruction 4 1 1 12 Otherwise skip this step Vincent A Rosa Florida Gulf Coast University Page 20 of 50 Spring 2009 Communicating with a User Manual Atmel AVR STK500 Host PC and Temperature Sensor SK CodeVisionAVR Open Leg File Edit Search View Project Look in O STK500_DAQ_Temp hd a E gt fie Ty New Ctrl N exe i Z Open Ctrl O LD Clinker My Recent CD List Reopen
7. Documents obj G stk500_daq temp prj Desktop hy Tes Page Setup PE My Computer amp File name stk500_daq_ temp pr ae ei Exit My Network Files of type Project files prj Figure 4 21 Screenshot of how to open an existing CodeVisionAVR project from the CodeVisionAVR IDE 4 2 2 2 Goto the Settings menu and select Programmer as seen in Figure 4 22 to establish the appropriate AVR board with which the CodeVisionA VR Chip Programmer will be communicating i CodeVisionAVR host Shared Folders truth 3 24 File Edit Search view Project Tools Settings Help bes Haganas gt Set Debugger gh pi By o ih HP AE AXE B 9 Programmer E Code Navigator RE ce gE Terminal fiw ee ee ee ae rt LcAam Jo Lo Figure 4 23 Screenshot of how to access the CodeVisionAVR Programmer settings 4 2 2 3 Select the desired AVR board under the AVR Chip Programmer Type drop down menu within the Programmer Settings pop up window Also select the COM Vincent A Rosa Florida Gulf Coast University Page 21 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor port to which the serial USB cable is attached from the AVR board in use In this example an AVR STK500 evaluation board is connected to the host PC at COM3 as seen in Figure 4 23 Click OK to proceed amp Programmer Settines wR Chip Frogrammer Type Atmel STK500 AVRISP Communication Port coma We A
8. Network Places Send To uk Caps Details A Create Shortcut stk500_program_flash b MS DOS Batch File Date Modified Today May 19 2009 7 56 PM Delete Rename Properties Figure 4 45 Screenshot of how to open a batch file to edit and not to run 4 4 3 13 Every command in a batch file should be on its own line It is common practice to not display i e to not echo the commands contained within a batch file during their execution in a CMD session Add the command ECHO OFF to the top of the batch file to achieve this The symbol prevents the command that follows from being echoed The ECHO OFF command stops all following commands from being displayed 4 4 3 14 Itis good practice to provide comments to explain the purpose of the batch file and why certain commands are used All comments should not be executed so the remark keyword REM must precede each individual comment line Multiple lines of comments can be handled in one block by placing them between the GOTO label_name command and a label e g LABEL Add the following block of comments to the batch file Vincent A Rosa Florida Gulf Coast University Page 42 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor GOTO skip This is a sample batch file that will erase all contents from the flash memory of the ATmega8515L installed on an STK500 evaluation board skip 4 4 3 15 Add the following command lines to t
9. Save ds Codevisiona VA Y Clean Up Gil Save Al shift ctri s m Project stk 500 r ec Motes F Close ea aia stk500_tesl Close All Al Other Files li Convert bo Library Page Setup Print Preview i Motes EB Print Ctrl P Configure Exit m I M LIL l oie Figure 4 11 Screenshots within the CodeVisonAVR IDE From left to right how to save all project files how to build all project files Information Compiler Assembler Chip AT mega 5i5L Clock frequency 3 666400 WHz Program type Application Memon modet Small Optrnize for Sre printf features int width e ecant features int width Promote char te int Yes char is unsigned Yes global const stored in FLASH No 8 bi enum Yes Enhanced core instructions Yes Automatic register allocator ies Smart register allocation Yes 9210 line s compiled No errors a Ho wamings Bit variables size 0 byte s Data Stack area 60h to DFh Data Stack size 128 bytes Estimated Data Stack usage 34 byte s RAM Global variables area EOh to ESh RAM Global variables size 6 byte s Hardware Stack area EGA bo 25F Rh Hardware Stack sre 378 byte s Heap size 0 bytes EEPROM usage 0 byte s O08 of EEPROM Program size 934 words 1868 bytes 22 8c of FLASH Figure 4 12 Screenshot of the CodeVisionAVR Information pop up window that appears after building project Vincent A Rosa Flo
10. the target memory before programming it Sometimes erasing the memory is a required action to ensure data consistency between the amount of utilized 1 e programmed memory and the size of the program being uploaded to memory CodeVisionAVR C hip Programme File Edit Program Read Compare Help 4 Erase Chip Chip E Blank Check v f SCK F Si FLASH ly Hz T EEPROM l rLasi w i Start Lock Biks 5 h i Fuse Bitis Check al Figure 4 26 Screenshot of how to access the Erase Chip program command from the Code VisionAVR Chip Programmer 4 2 2 7 Goto the Program menu within the CodeVisionAVR Chip Programmer window and select FLASH as seen in Figure 4 27 This will program the flash memory of the target MCU Vincent A Rosa Florida Gulf Coast University Page 24 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor S CodeVisionAVR Chip Programme File Edit Program Read Compare Help Ge Erase Chip Chip X Blank Check lv E SCK F Si FLASH Hz S EEPROM FLASI Start a Lock Bits SS Fuse Bit s eck all Ll Pee eee ee ee ee E Tt i Ch Figure 4 27 Screenshot of how to access the FLASH program command from the Code VisionAVR Chip Programmer 4 2 2 8 Click on the X in the top right corner of the Code VisionAVR Chip Programmer window as seen in Figure 4 25 to exit the CodeVisionAVR Chip Programmer 4 2 2 9 Click on the X in the top right
11. utility CMD The following instructions can be used to write a sample batch file that will erase the contents of the target MCU installed on the STK500 board the ATmega8515L in this example 4 4 3 12 Create a new batch file or open the one created from steps 4 4 3 1 through 4 4 3 11 Go to the directory that contains the desired batch file right click over the file and select Edit as seen in Figure 4 45 This will open a batch file for editing not running in the default text editor e g Notepad Vincent A Rosa Florida Gulf Coast University Page 41 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor a G T stk500_example road ole File Edit View Favorites Tools Help b i Back Ft 4 Search ey Folders fs a ie Xx Le Folder Sync r O C stk500_example bi Go P oo StkS00 exe stkS00_prog hesx File and Folder Tasks 2 i a J j Rename this file 5 Gy Move this File O stk 500_program_ Flash bat A Cop this fie 4 TE Batch File d Publish this File to the Open Web Edt G E mail this file Print Print this file H Convert to Adobe PDF Delete this file E Convert to Adobe PDF and EMail Scan For Viruses Dther Places S Add to archive 83 Add to stk500_program _flash rar sa Local Disk Ci 2 Compress and email My Documents 22 Compress to stk500_program_flash rar and email E Shared Documents E mail with Yahoo 4 My computer h PowerI50 J My
12. 09 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Internet My Documents Internet Explorer Y A My Recent Documents E mail uo ir ta My Pictures D Microsoft Update oy My Music PE My Computer a My Network Places CodevisionaYR Evaluation Yeg l Nobepad Control Panel Set Program Access and Defaults SOL Server Configuration Manager AVR Studia 4 iS Printers and Faxes e OR 22 microsoft office Word 2007 Help and Support 2 Search Hig WinsiP va All Programs gt Log Off oJ Turn OFF Computer s Stan eM Figure 4 39 Screenshot of how to access the Windows Run utility from the Start menu 4 4 3 4 Type notepad into the Open field of the Run window and push Enter on the keyboard or select OK in the window as shown in Figure 4 40 This should open the Notepad application for writing editing text files wn Type the name of a program Folder document or Internet resource and Windows will open it For you Open notepad v Figure 4 40 Screenshot of the Windows Run utility Vincent A Rosa Florida Gulf Coast University Page 37 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 4 3 5 Goto the File menu and select Save As within the Notepad editor as seen in Figure 4 41 Untitled Notepad File Edit Format View
13. 2 API 12 It is designed to run on the host PC to store all data received from the STK500 board into a text file This text file can then be used to broadcast the received data via the Internet on a webpage as implemented with the HTML and PHP code in Appendix A 2 2 4 Developing a serial communication program for a Windows platform can be achieved by following the instructions provided in the Windows Serial Port Programming document 12 The Win32 API can be imported into a C program by including the windows h header file when using the Microsoft Visual Studio IDE Microsoft provides free versions of Visual Studio called Express Editions available online at http www microsoft com Express It is important to know that the current Win32 API has been changed by Microsoft to use the UNICODE character set instead of the ASCII character set still utilized by the standard C C libraries These standard C C libraries are outlined online at lt http www cplusplus com reference gt Another important tip is that the Windows sockets API given by winsock2 h must be included into a C program before windows h when both are used This prevents duplicate definitions for variables with the same names that are contained in both header files Both of the tips given here are implemented and commented upon within the serial program in Appendix A 2 2 2 4 4 3 Programming the STK500 from a Remote Location An application to program the ST
14. 7 Run a All Programs gt Log OFF Turn OFF Computer te Start it E Figure 4 15 Screenshot of accessing the Windows Run utility from the Start menu Vincent A Rosa Florida Gulf Coast University Spring 2009 Run m Type the name of a program Folder document or LE internet resource and Windows will open it for you Open cmd vi cancel Browse Figure 4 16 Screenshot of the Windows Run utility Page 17 of 50 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Gy C WINDOWS system32 cmd exe jol x Microsoft Windows AF Version 5 1 2600 C Copyright 1985 2001 Microsoft Corp C Documents and Settings Administrator cd C stk5S _example NS G N stkb H_example gt al r Figure 4 17 Screenshot of a CMD session where the directory has been changed This concludes how to program the STK500 using the Windows command line utility The error shown in Figure 4 18 will appear if the board is not powered on or has an incorrect hardware setup If this is the case be sure the board 1s powered on and is set up as directed in section 2 1 of this document The error shown in Figure 4 19 will appear if the referenced HEX file 1s not within the specified location Simply correct this by referencing the correct location or by adding the referenced HEX file into the same location as the Stk500 exe program Figure 4 20 shows the board was successfully program
15. 7 10 55 19 00C 66 20F H4290004 05 19 2009 17 11 32 19 00C 66 20F H4290004 03 19 2009 17 12 11 19 00C 66 20F H4290004 05 19 2009 17 12 48 19 00C 66 20F H4290004 05 19 2009 17 13 26 19 00C 66 20F Done Internet R 100 7 Figure 4 48 Screenshot of the DAQ results page for the sample website 4 4 4 3 Click on the link shown in Figure 4 47 labeled Click here to download all recorded temperature readings to do as it says Depending on the settings of the browser being used the file will be loaded and displayed over the current window in a new tab window or the browser will prompt to save the file to the local machine If the first happens click on the back button of the browser to go back to the website homepage 4 4 4 4 To select the desired HEX file to upload to the server click on the Browse button shown in figure 4 49 This is the file that will be programmed to the flash memory of the target MCU installed on the STK500 Vincent A Rosa Florida Gulf Coast University Page 46 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Load a HEX Application File to Program the Board Filename hex only Upload Figure 4 49 Screenshot of the remote programming portion of the website 4 4 4 5 Within the pop up window for choosing a file go to the directory that contains the desired HEX file e g Figure 4 50 and double click on it to select it Choose fil
16. Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 Application Programming 4 1 Writing an Application The C programming language not C is utilized to develop the applications that are uploaded to the microcontroller used in this project However other languages such as Assembly and Pascal can also be utilized as long as the code can be translated into a HEX or ROM file The purposes of these file types are further explained in section 4 2 Uploading an Application The following subsections provide programming examples for the ATmega8515L MCU 4 1 1 STKS00 External Communication Protocol USART The USART available on the STK500 is dependent on the MCU installed in one of the target sockets 1 and it is used to communicate from the target MCU to various other devices 10 In this project the target microcontroller is the ATmega8515L which is installed in socket SCKT3000D3 as shown in Figure 1 6 The USART interface of the STK500 consists of three registers the USART control and status register the USART baud rate register and the USART data register which is either 8 bit or 16 bit depending on the CPU of the target microcontroller 10 The ATmega8515L is an 8 bit AVR e it has an 8 bit RISC CPU so its USART data register 1s an 8 bit register The keywords given to the USART registers by the CodeVisionAVR library for ATmega8sg515L microcontrollers are UCSRA UCSRB UCSRC UBRRH and UBRRL where t
17. CU when it is installed in a target socket on an STK500 Before performing the following Vincent A Rosa Florida Gulf Coast University Page 15 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor instructions be sure to establish the hardware setup described in the Hardware Connectivity section 2 1 and then power on the board using the switch shown in Figure 2 3 The Troubleshooting section of the appendix section A 3 provides some common techniques used to be sure the board is properly powered on and is ready to be used Commands Summary d device_name m programming_mode e optional_memory_device p memory_device v memory_device if HEX_file c com_port Executed Commands dATmega8515 gt get the protocols to program the Atmega8515 ms gt serial programming mode e gt erase all memory devices before programming HDT gt program the flash memory vyf gt verify the flash memory ifstk500_prog hex gt use the HEX file stk500_prog hex to program the flash ccom4 gt use com4 as the communication port 4 2 1 1 Copy and paste both the Stk500 exe program and the desired HEX file into a designated location which is C stk500_example for this procedure Create this directory if it does not exist CodeVisionAVR stores the HEX file built from an application in a folder labeled Exe within the directory assigned for this application
18. Direction Pullup OQutput Value Bit 0 In T Bro BitO In P Bitd Bil In T Bt Bit1 In P Bit 1 Bit2 In T Bit2 Bit2 In P Bit 2 Bita In T Bt3 Bit3 In P Bit 3 Bit4 In T Bit Bir4 In P Bit 4 Bit5 In T Bit 5 Bir In P Bit S bit In Ti Bitb Bit amp In P Bit Bit 7 In T Br Bit In P Bit Figure 4 6 Screenshots of CodeWizardAVR Ports setup for PORTA From left to right PORTA default setup PORTA after toggling all Data Direction values 4 1 1 7 Select the PORTC tab and change the settings to match those in Figure 4 7 This is done by toggling all values in both the Data Direction and Pullup Output Value sections i e click on the fields that contain In to change them to Out and then click on the fields that contain 0 to change them to 1 Vincent A Rosa Florida Gulf Coast University Page 5 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor External IRQ Timers USART External IRAQ Timers USART Analog Comparator SPI 2C 1 Wie Analog Comparator SPI 12C 1 Wire LCD Bit Banged Project Information _ LCD Bit Banged Project Information Chip External SRAM Ports Chip External SRAM Ports PorttA PotB PortC PotD Porte Pot PotB PotC PotD Port Data Direction Pullup Output Value Data Direction Pullup Output Value BitO In T Bio BitO Out 1 Bo Bit1 In T Bit Bit Out 1 Bit Bit2 _In Ti Bit2 Bit2 Out 1 Bit2 Bit3 In T Bit3 Bit3 Out 1 Bit 3 Bit4 In T Bit4 Bit 4 Ou
19. Help New Ctri h Open Chri 0 Save Ctrl 5 Save AS Page Setup Print Ctrl P Exit Figure 4 41 Screenshot of accessing the Save As feature in Notepad 4 4 3 6 Select the desired directory from the Save in field which is C stk500_example for this procedure as shown in Figure 4 42 Vincent A Rosa Florida Gulf Coast University Page 38 of 50 Spring 2009 Communicating with a User Manual Atmel AVR STK500 Host PC and Temperature Sensor Save As 2 e Save in stk500_example 3 e Eih ty My Recent Documents A Desktop ai My Documents My Recent of My Computer Documents H 3 Floppy A z Local Disk C to B DYD FiW Drive D Desktop ED Drive p 4 CD Drive fr S Shared Folders on host 2 gt Shared Documents My Documents G My Documents a My Network Places G Sundry E My Computer amp File name bet fael in 5 My Network Save as type Text Documents tet Encoding ANS Figure 4 42 Screenshot of the Save As pop up window in Windows The selected directory is lt C stkSO0_example gt Change the Save as type field to All Files as shown in Figure 4 43 to allow 4 4 3 7 the current text file to be saved with an extension such as BAT other than TXT Give the batch file a name ending with bat as shown in Figure 4 43 and click 4 4 3 8 Save This will create a new batch file with the
20. K500 needs to be located on its host This application must also be made available for the web server to execute when some remote user chooses to program the board via a website A batch file can be used as the application that programs the board and a PHP function can be used to execute this batch file when a remote user makes a request e g pushes a button to program the board from the website Before the board is programmed however the user must upload an appropriate HEX or ROM application to the server The server must then send the uploaded application to the host of the STK500 Since the host and the server are the same machine for this project the latter step can be omitted Vincent A Rosa Florida Gulf Coast University Page 34 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor The PHP code in Appendix section A 2 2 4 provides an example on how to achieve uploading files to the server and how to execute a program installed on the server It is important to use proper directories and file names For this project the batch file is placed in the same directory as the PHP program that executes it and each uploaded HEX file has its name changed to match the one used within this batch file stk5OO_prog hex in this case The purpose of the batch file stk500_program_flash bat in Appendix A 2 2 3 is to allow a remotely located user to program the flash memory of the installed target MC
21. Temperature Sensor followed by the appropriate pin number For example PINB 0 accesses pin 0 of PORTB Le PBO on the board and PIND 7 accesses PD7 4 1 2 myT WI Communication Protocol IC The myTWI Temperature Sensor uses the TWI I C bus to communicate with external devices where I C is a serial data bus developed by Philips Semiconductors in the 1980s and is now a worldwide standard 5 The IC bus is intended for communication of relatively small amounts of data across relatively short distances 5 The serial data SDA and serial clock SCL lines shown in the pinout in Figure 4 14 are the physical elements responsible for IC data communication The software used to parallel these hardware constructs is given in Appendix section A 2 2 1 and is further explained in section 4 1 3 4 1 3 DAQ with the STK500 and myTWI The instructions provided within this section establish a data acquisition system with an STK500 evaluation board a my WI Temperature Sensor and a host PC Performing the following steps will reproduce the program given in Appendix section A 2 2 1 The specifics of the code are explained by the comments given within the application 4 1 3 1 Perform steps 4 1 1 1 through 4 1 1 8 4 1 3 2 Select the I2C tab select PORTE from the I2C Port drop down menu and then check Enabled under the LM75 tab The settings should now match those shown in Figure 4 14 if they do not match change
22. Tmegal69 CKDIVS Fuse Warning Figure 4 23 Screenshot of the CodeVisionAVR Programmer Settings pop up window 4 2 2 4 Goto the Tools menu within the CodeVisionAVR IDE and select Chip Programmer as seen in Figure 4 24 ise CodeVisionAVR host Shared Folders truth324 On My Mac File Edit Search View Project Tools Settings Help Bee Boc 53 CodewWizardavR Shift FZ2 l Debugger shift F3 Me l Chip Programmer Shift F4 fs Code Navigator 7 X Terminal Shift F5 host Sm CodeVisionAVR Configure ples i Project stk500_daq_t I prow mg wad Ful akas LOL ha sree TT Figure 4 24 Screenshot of how to access the CodeVisionAVR Programmer tool 4 2 2 5 Select the desired MCU from the Chip drop down menu within the CodeVisionAVR Chip Programmer window Also select the appropriate SCK Freq Vincent A Rosa Florida Gulf Coast University Page 22 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor i e the appropriate SPI Bus Serial Clock Frequency which is the speed for the Serial Peripheral Interface SPI In this example the target MCU is the ATmega8s515L which has a default SCK frequency of 230400 Hz 15 as shown in Figure 4 25 The ATmega8515 L Datasheet 4 further explains how to calculate this frequency with respect to different settings e g SCK with respect to Oscillator Frequency in the subsection
23. U via the Internet from a webpage This is achieved by the webpage allowing for the user to first upload a HEX file to the server host PC and then initiate an event 1 e push a button to execute the batch file on the server host Executing the batch file should then program the flash of the target MCU A batch file is a special type of text file that contains lines of commands that are executed within a CMD window session as soon as the file is opened The following instructions can be used to make a batch file in Windows XP Although Notepad is used in the following steps as the text editor any text editor can be used e g WordPad 4 4 3 1 The Folder Options for Windows Explorer must be set up so that text files txt can be saved as batch files bat Open an Explorer window by opening any folder e g My Computer or My Documents Then click on the Tools menu and select Folder Options as seen in Figure 4 37 The Folder Options window should pop up d My Computer Fie Edit View Favorites Tools Help Map Network Drive wi Disconnect Network Drive l Synchronize f s My Computer Folder Options Figure 4 37 Screenshot of accessing the Windows Folder Options from Windows Explorer Vincent A Rosa Florida Gulf Coast University Page 35 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 4 3 2 Select the View tab within the Folder Opti
24. Use the HEX file located in C stk5O0O_example STK500_TestProg Exe created from section 4 1 1 to better follow this example Copy and paste this file into C stk500_example and rename the pasted file to stk500_prog hex 4 2 1 2 Goto Start and select Run as shown in Figure 4 15 4 2 1 3 Type cmd into the text field of the Run utility that pops up as shown in Figure 4 16 and click OK This will start a new instance of a CMD shell session Vincent A Rosa Florida Gulf Coast University Page 16 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 2 1 4 Change the directory using the cd command followed by the location designated in step 4 2 1 e g enter cd C stk500_example as shown in Figure 4 17 4 2 1 5 Enter the following line into the current CMD session stk500 dATmega8515 ms e pf vf ifstk500_prog hex ccom4 ie i e make ik be bik Administrator Internet oF Internet Explorer E mail i Yahoo Mail o Microsoft Update M e Notepad CV Codevisin YR C Compiler AVR Evaluation Ca My Documents fe My Recent Documents gt My Pictures ey My Music 33 My Computer t My Network Places ee Control Panel b A Microsoft Visual Studio 2008 Cy Set Program Access and Defaults es HyperTerminal Printers and Faxes ZE microsoft office Word 2007 ce Help and Support pe Search WINRAR
25. a Player 33 Windows Messenger A windows Movie Maker gt Windows Search Sie nacre Figure 4 1 Screenshot of how to start CodeVisionAVR Evaluation Florida Gulf Coast University Spring 2009 Page 2 of 50 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 1 1 2 Go to the File menu and select New within the CodeVisionAVR window shown in Figure 4 2 ie CodeVisionAVR File Edit Search View Project Tools Settings Help D New Ctrl M Open Ctrl 0 ka Reopen b be Code Information 4 EJ Page Setup Exit Figure 4 2 Screenshot of how to create a new source file or project in Code VisionA VR 4 1 1 3 Select Project and click OK in the Create New File pop up window shown in Figure 4 3 B Create New File x File Type Figure 4 3 Screenshot of the CodeVisionAVR pop up selection window to decide whether to create a new source file or project Vincent A Rosa Florida Gulf Coast University Page 3 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 1 1 4 Select Yes in the Confirm pop up window shown in Figure 4 4 to use a wizard that will automatically generate certain AVR code based on the settings given Confirm You are about to create 4 new project Pd Do you want to use the CodeWizardavR Figure 4 4 Screenshot of the pop up window confirming whether or not to u
26. adedFiles stk500 prog hex Program the STK500 Back Done Internet 100 Figure 4 52 Screenshot of the results page after uploading a file to the server via the sample website 4 4 4 7 To program the target MCU installed on the STK500 click on the button labeled Program the STK500 within the results window shown in Figure 4 52 Click on the Back link to go back to the homepage without programming the board The results shown in Figure 4 53 should display if the board is successfully programmed This also means that the application started execution right after being loaded Vincent A Rosa Florida Gulf Coast University Page 48 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor http 69 88 163 18 vincent Functions ExecBat php Windows Internet Explorer x i i h d http 69 68 163 16 vincent Functions ExecBat php a 4 X Bie hea ww ake http 69 88 163 18 vincent Functions ExecBat php E 3 m Fage Gi Tools D Internet 100 Figure 4 53 Screenshot of the results page after successfully programming the networked STK500 4 4 4 8 Click on the button labeled View Last Received Data shown in Figure 4 53 to view the most current data sent from the STK500 to the server This button is used as a way to reassure whether the board has been properly programmed with the correct HEX application Cli
27. ammed to control the switches then a 10 wire cable must properly connect the PORTA header to the SWITCHES header Appendix section A 3 Troubleshooting addresses how to resolve some of the common issues encountered that would cause the board to not respond as desired with respect to the installed application The following set of instructions provides how to check whether the sample programs in Appendix sections A 2 1 and A 2 2 1 are running properly on the STK500 PCB 4 3 1 Open the HyperTerminal program by going to Start All Programs Accessories Communications and selecting HyperTerminal as seen in Figure 4 28 If this is the first ttme HyperTerminal is used enter an area code and follow the on screen instructions given by the HyperTerminal program Click OK to proceed Vincent A Rosa Florida Gulf Coast University Page 26 of 50 Spring 2009 Atmel AVR STK500 f My Computer My Metwork Places B Recycle Bin l Internet Explorer CMA ThA od e p Ww Microsoft Update AS Acrobat Distiller 9 CY codevisionave C Col J Adobe Acrobat 9 Pro AVR Evaluation Notepad Microsoft Visual stud Big Win SP 2 Microsoft Office worl Figure 4 28 Screenshot of how to start a HyperTerminal session 4 3 2 Internet Internet Explorer E mail Yahoo Mail 4 BS v JA National Instruments LabVIEW 6 6 g HyperTerminal a Ain Je All Prog
28. ard Wireless Network Setup Wizard User Manual Type a Name for the HyperTerminal session say com3_STK500_DAQ and select an Icon within the Connection Description window as shown in Figure 4 29 Click OK to proceed Vincent A Rosa Florida Gulf Coast University Spring 2009 Page 27 of 50 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Connection Description ax 5 New Connection Enter a name and choose an icon for the connection Name com3_STK500_DAQ Icon Poewengeeenenensomenses Figure 4 29 Screenshot of the Connection Description window used by HyperTerminal to establish a new connection 4 3 3 Choose the appropriate COM port to which the STK500 is connected The example in Figure 4 30 shows COM3 is used but this can be different on another computer The Troubleshooting section in Appendix A 3 explains how to determine which port is being used by the STK500 Connect To 2 leg com3_STK500_DAQ Enter details for the phone number that you want to dial Country region Area code Phone number Connect using COM3 v Figure 4 30 Screenshot of the Connect To window that HyperTerminal uses to establish at which COM port to receive or send data 4 3 4 Select the appropriate COM properties to match the requirements given by the program uploaded to the target MCU the ATmega8515L in this case
29. ck the Back link to go back to the homepage without viewing the last received data If the View Last Received Data is selected the results page will load over the current browser window and will display a message similar to that shown in Figure 4 54 From here click the on the link Back to go back to the homepage Vincent A Rosa Florida Gulf Coast University Page 49 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Sex Lel i http 169 89 163 18 vincent Functions ReadLastRec php v 4 X p E http 69 00 163 10 vincent F une tions ReadLastRec php Windows Internet Explorer BF ate http 69 88 163 1 vincent Functions ReadLastRec i bu m iri Page iG Tools 05 19 2009 23 32 01 Data Received USART Communication Test Succeeded 28 Internet 4 100 Figure 4 54 Screenshot of an instance of the results page for the data last received by the server from the networked STK500 This concludes how to use the sample website to remotely access the mylWI to STK500 data acquisition system Vincent A Rosa Florida Gulf Coast University Page 50 of 50 Spring 2009
30. corner of the CodeVisionA VR window as seen in Figure 4 13 to exit the entire CodeVisionAVR IDE If any changes have been made to any files without saving them a pop up window will appear confirming whether the files should be saved Select Yes to save the changes and exit select No to just exit or select Cancel to not exit and return to the program This concludes how to use the CodeVisionAVR IDE to program an AVR device using an existing CodeVisionAVR project Appendix section A 3 Troubleshooting addresses some of the common errors encountered during this procedure and explains how to resolve them 4 3 Executing an Application The installed application will begin executing right after it is loaded into the target MCU of the STKS500 right after the board is powered on or right after the RESET button is pushed The most important operations performed by an AVR application are typically written within an infinite loop nested in its main function which is the case for both sample projects provided in Vincent A Rosa Florida Gulf Coast University Page 25 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Appendix section A 2 Therefore these operations should run continuously while the board is powered on It is imperative to remember that the functionality of the board with respect to its application software is dependent on the hardware setup e g if PORTA is progr
31. d a HEX Application File to Program the Board GetData Filename hex only Browse Upload Click here to download all recorded temperature readings Dane Internet 100 Figure 4 46 Screenshot of the sample website used to remotely access the myTWI to STK500 data acquisition system 4 4 4 2 To display the last ten temperature readings obtained by the host server from the STKS500 click on the Get Data button shown in Figure 4 47 The results should load and display over the current browser window and should look similar to those shown in Figure 4 48 Click on the link labeled Back to return to the homepage Vincent A Rosa Florida Gulf Coast University Page 45 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Last 10 Temperature Readings Click here to download all recorded temperature readings Figure 4 47 Screenshot of the DAQ portion of the sample website e http 69 00 169 10 vincent Functions ReadTemps php Windows Internet Explorer Oleg E http 69 88 163 1e vincenk Fuinchone ReadTemps pho Ja X wot a wat aby http 69 88 163 18 vincent Functions ReadTemps php E z m Page C Tools H4290004 05 19 2009 17 07 46 19 0eC 66 20F H4290004 05 19 2009 17 08 24 19 00C 66 20F H4290004 05 19 2009 17 09 02 19 0eC 66 20F H4290004 05 19 2009 17 09 40 19 00C 66 20F H4290004 03 19 2009 17 10 17 19 00C 66 20F H4290004 03 19 2009 1
32. e 2 leg Look ir stk500_example 7 P mg E stks00 exe Ets Z stk500_prog hex My Recent M istkS00_program_flash bat Documents My Computer My Network File name stk500_proa hex Places Files of type All Files Cancel Figure 4 50 Screenshot of the Choose file window used by Internet Explorer to select a file to upload to a website 4 4 4 6 Click on the Upload button shown in Figure 4 51 This figure also shows that the local path of the selected HEX file from step 4 4 4 5 is displayed in the Filename field The results should load and display over the same browser window as shown in Figure 4 52 Vincent A Rosa Florida Gulf Coast University Page 47 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Load a HEX Application File to Program the Board Filename hex only C stk500_example stk5 Upload Figure 4 51 Screenshot of an instance of the remote programming section of the sample website http 69 80 163 18 vincent Functions UploadFile php Windows Internet Explorer J leg ey E http 69 88 163 18 vincent Functions UploadFile php tal t X Pi w ai http 69 88 163 18 vincent Functions UploadFile php a z m v 7 Page iG Tools j Upload stkS00_prog hex Type text plain Size 146484575 Kb Temp file C WINDOWS Temp phpC8 amp D tmp Stored in C Inetoub wwwroot vincent Uplo
33. given name in the directory selected in step 4 4 3 6 Vincent A Rosa Florida Gulf Coast University Page 39 of 50 Spring 2009 Atmel AVR STK500 4 4 3 9 Communicating with a User Manual Host PC and Temperature Sensor Save As ey rx Save in O stk500_exarmple v amp bi E gt fie A M Stk500 exe ite ES stk500_prog hex My Recent Documents Desktop yu My Documents 33 My Computer a File name stk 500_program_lHazh bat w My Network Save as type All Files v Encoding ANS pm Figure 4 43 Screenshot of an instance of the Save As window Add the desired commands within the editor window 4 4 3 10 While pressing the control key CTRL on the keyboard press the s key to save the batch file 4 4 3 11 Click the X in the top right corner of the editor window to close the Notepad application shown in Figure 4 44 Vincent A Rosa Florida Gulf Coast University Page 40 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor stk500_program_flash bat Notepad i opg File Edit Format view Help Figure 4 44 Screenshot of the Notepad editor opened to the empty file stk500_program_flash bat This concludes how to create a batch file The requirements for writing a batch file to program an STK500 parallel those established in section 4 2 1 which explains how to program an STK500 using the Windows command line
34. he UCSRx keywords correspond to the high A middle B and low C sections of the USART Control and Status Register and the UBRRx keywords correspond to the high H and low L sections of the USART Baud Rate Register The USART data register is controlled by the specialized I O functions provided in the avr libc library Such input functions include getc and gets and such output functions include putc puts and printf These are the same functions available in the cstdio header of the C Library libc 11 but they have been revised in the AVR C Library avr libc for USART communication with respect to AVR microcontrollers 10 The required hardware setup to enable the use of the USART on the STK500 is given by the instructions in section 2 2 Appendix section A 2 1 provides a sample program that can be used to test USART communication between the board and its host Sections 3 1 and 3 2 of this Vincent A Rosa Florida Gulf Coast University Page 1 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor document explain the necessary steps to take before applications development can begin on the host PC The following instructions describe steps to implement the application in Appendix A 2 1 using the CodeVisionAVR IDE 4 1 1 1 Open the CodeVisionAVR IDE on the host by going to Start All Programs CodeVisionAVR and selecting CodeVisionAVR C Compiler Evaluatio
35. he batch file The stk500 is the command that accesses the Stk500 exe program to perform the operations that follow on the same line The order in which the following operations are listed does not matter Notice how the ATmega8515L is accessed using dATmega8515 This is the correct way of accessing all versions of the ATmega8515 MCU with the STK500 DOS programmer The ms operation enters into serial programming mode The e operation erases the target device REM The following command redirects the CMD session to a directory REM that contains the Stk500 exe program cd C stk500_example REM The following command will erase all contents in an ATmega8515L stk500 dATmega8515 ms e 4 4 3 16 Press CTRL and s at the same time on the keyboard to save the file 4 4 3 17 Click the X at the top right corner of the editor window to exit Notepad 4 4 3 18 Go to the directory where the batch file that has now been created is saved and open it by double clicking on its icon This should execute the batch file in a stand alone CMD session If any errors occur make sure that all steps were followed accurately and fix any mistakes If no mistakes are found and the errors persist refer to Appendix section A 3 to troubleshoot the possible causes This concludes writing a sample batch file that will erase the flash contents of the ATmega8515L MCU The STK500 User Guide 1 has a complete list and explanation of all viable commands for the STK500 DOS
36. iew USAF i Generate Save and Exit Interrupt m YA Exit Transmitter Ts Interrupt Figure 4 9 Screenshot of generating and saving a program formed using the CodeWizardAVR within CodeVisionAVR 4 1 1 10 Go to your desired directory say C Documents and Settings Administrator My Documents and create a new folder say STK500_TestProg Note it is good practice in CodeVisionAVR development to save all project files for a project within the same designated folder Go into this folder and give the C file a name say stk500_test_prog as shown by the first pop up window within Figure 4 10 A series of pop up windows will appear for naming other files Simply provide a name for these files they can be named with the same name as the C file but they must be given different extensions as shown in Figure 4 10 Vincent A Rosa Florida Gulf Coast University Page 7 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Save C Compiler Source File 203 Save C Compiler Project File Leg Save inc STKS00_TexProg O F eE Savei O STES00_TestProg v tT E E 4 4 PE biy Recent My Recent Documents Documents ri F 4 Desktop Desktop AF a My Document hy Documents al lg 43 y My Computer My Computer a File nama k500_lest_prog c il Save J File name atk S00 test prog sat Save rot a EE ars D i M
37. if Get the temperature aS an inte Tr i g DSTACK F 170 tempC x10 la75 temperature 10L switch i 0 put i7 PORTC PORTC toggle LED val case i i ee J E ostai 7 lt 12 a T 7 ah b 7 E pae s Pe z fi pubche i GF fa 7 Send the alr a ae Uata Pid Told main wowed i anc 474 f Divide by 10 to get the proper lt ray Fe gt gt Messages an FT Errors A wWamngs A Messages i Find i Files 291 Insert Figure 4 13 Screenshot of the CodeVisionAVR IDE with an emphasis on the Errors message window 4 1 1 14 Keep the CodeVisionAVR IDE open and go to the Uploading an Application section 4 2 2 to program the target MCU with the application produced in this section This concludes writing a sample application that can be used to test USART communication where data is sent from the STK500 to the host PC The variables PINA and PORTC shown in the code given in step 4 1 1 11 are the defined in the mega8515 h library header file which is automatically included when the code is generated from steps 4 1 1 9 and 4 1 1 10 These variables allow for control over the physical PORTA and PORTC headers A variable given by PINx accesses all pins of PORTx where x represents an appropriate port letter from A through E Individual pins of a port header can be accessed using the dot operator Vincent A Rosa Florida Gulf Coast University Page 11 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and
38. med after fixing the two previously listed errors Appendix section A 3 Troubleshooting addresses some of the common errors encountered in this section and provide some techniques on how to resolve them Vincent A Rosa Florida Gulf Coast University Page 18 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor C WINDOWS system32 cmd exe Microsoft Windows XP Version 5 1 2600 C Copyright 1985 2081 Microsoft Corp C Documents and SettingssAdministrator cd C stkSHA _example C stk5 _example gt stk5S dATmega 8515 ms e pf uf ifstkS 6_prog hex ccom4 I KS 4 command line programmer v 2 2 Atmel Corp lt 9 2084 2065 Could not connect to STK5 6 V2 on com4 Gis stko _example gt xl E gt Figure 4 18 Screenshot of a CMD session where an error occurred programming an STK500 C WINDOWS system32 cmd exe D x Microsoft Windows XP Version 5 1 2600 C Copyright 1985 2081 Microsoft Corp C Documents and Settings Administrator ecd C stkS _example stkS _example gt stkS dATmega85i5 ms e pf uf ifstkS _prog hex ccom4 STK5 command line programmer v 2 2 Atmel Corp lt C 2004 2005 Gould not connect to TRKSAA U2 on com4 C stk50 _example gt stk5 6 dATmega8515 ms e pf vf ifstk5 6_prog hex ccom4 STKS command line programmer v 2 2 Atmel Corp CG 2684 2085 Connected to STKS 4 U2 on port com4 Device parameters loaded Pr
39. microcontroller installed on an STK500 can be programmed using the Windows command line utility CMD The CMD session must be in the same directory as the Stk500 exe program which is located in C Program Files Atmel AVR Tools STK500 when AVR Studio is installed in its default directory The Stk500 exe program is an STK500 DOS programmer provided by Atmel It can be copied and pasted to any desired location after AVR Studio is installed The HEX file that will be programmed to the board must either be in the same location as the Stk500 exe program or its directory must be provided in the command line used to program the board the preceding option is recommended and is used for the sample DAQ project provided in this document Any pre existing HEX file can have its name changed without it losing its functionality A list of all applicable commands is given in the STK500 User Guide 1 Being able to use CMD allows for a batch file bat to be created that automatically programs the board when the file is opened A batch file is simply a text file that contains CMD commands that will be executed line by line within a CMD session as soon as the file is opened The batch file given in Appendix section A 2 2 3 provides an example of how the command utility can be used to program the STKS500 The following list of commands and how they are used accompany the instructions that provided an example of how to use the CMD to program an ATmega8515L M
40. more information on the functions available in the CodeVisionAVR LM75 library given by the 1m75 h header file which is automatically included when the code is generated from instruction 4 1 3 3 4 2 Uploading an Application Programming the Board It is important to remember that the target microcontroller installed on the STK500 is what is actually being programmed Only HEX file programs can be uploaded to the flash memory of Vincent A Rosa Florida Gulf Coast University Page 14 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor the target MCU and only HEX or ROM file programs can be uploaded to the EEPROM memory of the target MCU The flash memory of AVR microcontrollers is typically what is programmed because of its available space and relatively unlimited read and write life cycles EEPROM memory has a limited write life cycle so only programs that will be used frequently and remain relatively unchanged are reserved for EEPROM 10 This project focuses on the use of the flash memory only The STK500 PCB has a specific RS 232 communication protocol that requires data to be received for in system programming using eight data bits one stop bit and no parity at 115 2 kbps 1 e at a rate of 115200 baud 14 The following subsections describe two ways of using this protocol to upload an application to an STK500 board 4 2 1 Using a Command Line Utility to Program the STK500 The
41. n as shown in Figure 4 1 Vincent A Rosa My Computer pe ADT 4 Microsoft Visual Stu es CEETIY S Ah e My Network MI ELYIS Places Traditional E 2 Recycle Bin Remote Desktop ei tJ Shortcut to el aipcya icy sy Internet Explorer pi td Chavbeiik ba Hal Administr Internet Internet Explorer E mail Yahoo Mail Dd Microsoft Update Microsoft Visual Stud fo Notepad es HyperTerminal cV CodevisionavR Eval 2 04 0a w Microsoft Office Wor P Shortcut to STKS00_DAQ_HostP Microsoft Update Set Program Access and Defaults Windows Catalog an Accessories fan Administrative Tools T Atmel AVR Tools fm CodeVisionAVR an Games T MATLAB 7 1 fan Microsoft Developer Network an Microsoft Office M Microsoft SQL Server 2005 Codevision YR C Compiler Evaluation EY CodeVisionAVR C Compiler Evaluation Help 5 Uninstall CodeVisionAYR C Compiler Evaluation Microsoft Visual Studio 2008 M Microsoft Windows SDK 6 04 National Instruments M PL 2303 USB Serial Driver M Powerlso Van Startup an Symantec Client Security M winavR 20090313 m windows PowerShell 1 0 winrar M winsce Acrobat Distiller 9 A amp crobat com A Adobe Acrobat 9 Pro lc Adobe LiveCycle Designer ES 8 2 ES Adobe Reader 9 Internet Explorer Ww MSN 4 National Instruments LabVIEW 8 6 A Outlook Express Remote Assistance Windows Medi
42. ogramming mode entered Device erased Could not read FLASH input file Progranming mode left Connection to STKS60 V2 closed WARNING One or more operations failed Please examine the output log abovet C stkS _example gt _ 4 Figure 4 19 Screenshot of a CMD session where an error occurred programming an STK500 Vincent A Rosa Florida Gulf Coast University Page 19 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor C WINDOWS system32 cmd exe Jof x icrosoft Windows KP Uersion 5 1 2600 a lt C gt Copyright 1985 2661 Microsoft Corp Documents and Settings Administrator gt cd C stk566_example stk566_example gt stk566 dATmega8515 ms e pf uf ifstkS 6_prog hex ccom4 STKS6 command line programmer v 2 2 Atmel Corp CG 2664 26065 ould not connect to STKS6 U2 on com4 stk566_example gt stk566 dATmega8515 ms e pf uf ifstkS56 _prog hex ccom4 STK56 6 command line programmer v 2 2 Atmel Corp CG 2664 2065 onnected to STK5 U2 on port com4 Device parameters loaded Programming mode entered Device erased ould not read FLASH input file Programming mode left onnection to STKS66 U2 closed ARNING One or more operations failed Please examine the output log above stk5 _example gt stk566 dATmega8515 ms e pf uf ifstk5 _prog hex ccom4 STK506 command line programmer v 2 2 Atmel Corp O 2004 2005 onnected to STKS6 6 U2 on port com4
43. ons window and make sure that the field labeled as Hide extensions for known file types is unchecked as shown in Figure 4 38 Click on the check box to uncheck this field if is not already unchecked Select Apply and then OK to apply the settings and exit the Folder Options window respectively These settings will remain even after the machine is shutdown so this only needs to be done once Folder Options Ax General View File Types Offline Files Folder views You can apply the view such as Details or Tiles that you are using for this folder to all folders Apply to All Folders Reset All Folders Advanced settings Display the full path in the address bar A _ Display the full path in the title bar _ Do not cache thumbnails O Hidden files and folders Py Do not show hidden tiles and folders Show hidden files and folders USD BS BE TTT ETTET TTET e n Hide protected operating system files Recommended Launch folder windows in a separate process G Managing pairs of Web pages and folders Show and manage the pair as a single file Show both parts and manage them individually w Restore Defaults Figure 4 38 Screenshot of the View section within the Folder Options configuration for Windows 4 4 3 3 Goto the Windows Start menu and select Run as shown in Figure 4 39 to open the Windows Run utility Vincent A Rosa Florida Gulf Coast University Page 36 of 50 Spring 20
44. programmer The batch file in Appendix A 2 2 3 Vincent A Rosa Florida Gulf Coast University Page 43 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor provides a more complete example with comments on how to better utilize batch files to program an STK500 4 4 4 Website Operation The following instructions explain how to operate the sample website given by the code presented in Appendix section A 2 2 4 Steps 4 4 4 2 and 4 4 4 3 explain how to view the data acquired from the myTWI to STK500 data acquisition system formed in section 4 1 3 of this document Steps 4 4 4 4 through 4 4 4 8 explain how to program the STK500 in this same DAQ system Internet Explorer is the web browser used to provide screenshots for this set of instructions 4 4 4 1 Go to lt http 69 88 163 18 vincent index html gt in a web browser e g Internet Explorer or Firefox This is the web address to the sample website that allows for data acquisition and remote programming both with respect to the STK500 evaluation board that has an ATmega8515L MCU installed in one of its target sockets Figure 4 46 shows a screenshot of the homepage Vincent A Rosa Florida Gulf Coast University Page 44 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Atmel AVR STKS500 Web Access and Remote Programming Last 10 Temperature Readings Loa
45. rams Communicating with a Host PC and Temperature Sensor Microsoft Update Set Program Access and Defaults a Microsoft Windows Catalog visual Stu as ae H Accessories m Accessibility gt HyperTerminal Network Connections Administrative Tools F ER Communications Atmel AVR Tools Entertainment MIL ELVIS Traditional CodeVision Ave System Tools a a Games Address Book E A F MATLAB 7 1 Calculator Remote f fam Microsoft Developer Network Command Prompt Desktop f Microsoft GFFice b Notepad c E Microsoft SQL Server 2005 Faint L td Shortcut bo f GEN Gelam Microsoft Visual Studio 2008 d Program Compatibility Wizard Microsoft Windows SDE 46 04 j feger pacgdg aie Remote Desktop Connection ty Synchronize Tour Windows xP 9 Windows Explorer A WordPad Scanner and Camera Wizard National Instruments g PL 2303 USB Serial Driver H I FPoweris0 b Startup Symantec Client Security j 8 8 8 8 Vira YR 20090313 E Windows PowerShell 1 0 b WinRAR z WinS CP A Acrobat com Adobe LiveCycle Designer ES 3 2 Adobe Reader 9 Internet Explorer MSN Outlook Express Remote Assistance Windows Media Player Windows Messenger FL Windows Movie Maker po 2 Windows Search Log OFF fo Turn OFF Computer Peele 3 E Z Network Setup Wizard a New Connection Wiz
46. rida Gulf Coast University Page 10 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Be CodeVisionAVR host Shared Folders truth324 On My Mac Documents COLLEGE FGCU Spring 2009 Courses CEN 4935 Senior Software Eng ogg Fie Edit Search View Project Tools Settings Help Bes Hegooc ABS B A E P Bee eG id annene naglo EN Ssa AGB 2 NO E r ap EIA a EAE ee ad Ealain cht Cin be bartre ATNI E gt a T EAT lt a i Code Navigator PEI b Code Information O F 0 Whoe Shared Folders uth324 On My Mac Documents COLLEG EJ Code Templates Fa Clipboard History 4 amp M Codevisond VA H ak500_ daq temp c Hotes SkS00_daq_temp c if t a Project stk dag h E Includes 153 EF tos Bote PS Notes A Mactos 154 0 5 polarity stk500_ dag temp a FU Functions 155 Im 75 init 0 75 80 0 af i Headers 156 delay h 157 while 1 a ize h 158 B i do im7S h 159 ni Place your code bere iy a rh meas Sh 160 A fe while stdang h 161 The int la75 temperature iit while i j stdin kh 162 returns the temperature in de stdlib h f m 163 the LATS sensor with the addre i Other Files al Function Call Tree USE jes Gna 0 man al 165 CAUTION A J00as delay must be be Ep DSTACK Fure 0 166 a calls to this fumction 0 pint 167 f switch E DSTACK Furo 468 Cami FO pmi ie
47. rminal OEI com3_sTK500_DAQ HyperTerminal ee Fie Edit View Call Transfer Help File Edt View Call Transfer Help D a Da ss nD E USART Communication Test Succeeded Connected 0 00 25 Aube detect 115200 8 M 1 Connected 0 00 33 Aubo detect 115200 8 N 1 Figure 4 33 From left to right a screenshot of a HyperTerminal session with respect to the test application for USART communication a screenshot of a HyperTerminal session with respect to the myTWI to STK500 DAQ application 4 3 6 Click on the X in the top right corner of the HyperTerminal window as shown in the Figure 4 33 screenshots to exit the HyperTerminal program Two pop up windows will follow the first shown in Figure 4 34 confirms whether you want to exit HyperTerminal click Yes to proceed with exiting and the second shown in Figure 4 35 asks whether you want to save the current HyperTerminal session click Yes to save the session and then exit or click No to just exit Vincent A Rosa Florida Gulf Coast University Page 30 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Hyper Terminal You are currently connected Are you sure vou wank to disconnect now Figure 4 34 Screenshot of the HyperTerminal pop up window that appears when an attempt has been made to exit a HyperTerminal session Hyper Terminal A Do you want to save the connection named coma _S5TK500_DAQ men pare
48. s are visible delay_ms 1000 printer Goodbyel r n POR TC PORTC 4 1 1 12 Got to the File menu and select Save All as seen in Figure 4 11 to save all changes made to any of the project files 4 1 1 13 Go to the Project menu and select Build All as shown in Figure 4 11 Doing this will build and compile all necessary files including the HEX file used to program the flash memory of the target MCU from the code provided within the target C file in this case from stk500_test_prog c Itis possible for compilation errors to occur during this process but the results within the Information pop up window should look similar to those in Figure 4 12 if none appear If any errors exist they will appear in the Errors message window shown in Figure 4 13 The IDE will provide suggestions within this window on how to fix any incurred compilation errors Click OK within the Information pop up window to proceed Vincent A Rosa Florida Gulf Coast University Page 9 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor SE CodeVisionAVR hostis SE CodeVisionAVR C Documents and Settings Administra File Edit Search view Project Eile Edit Search View Project Tools Settings Help Ty New Ctr4 N f Be H H77 compie a k Open CO Pe Build Shift F9 f m p E Reopen z KP Rt SS Build All CtrF9 fe Code Navigator l TH
49. se CodeWizardA VR to generate a new project 4 1 1 5 Under the tab Chip within the CodeWizardA VR window select the target microcontroller in this case the ATmega8515L from the Chip drop down menu and change the Clock setting to the appropriate System Oscillator Clock frequency fosc with respect to the target microcontroller in this case 3 6864 MHz as shown in Figure 4 5 External IRG Timers USART Analog Comparator SFI lC 1 Wire LCD Bi Banged Project Information Chip External SRAM Ports Chip AT mega8515L v Clock 3 6864 4 MHz Check Reset Source Program Type Apolication w Figure 4 5 Screenshot of CodeWizardAVR Chip setup Vincent A Rosa Florida Gulf Coast University Page 4 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 1 1 6 Select the tab Port and change the settings under the PORTA tab to match those in Figure 4 6 This is done by toggling all values in the Pullup Output Value section 1 e click on the fields that contain T to change them to P External IRQ Timers USART External IRO Timers USART Analog Comparator SFI lC 1 Wire Analog Comparator SFI Lal 1 Wire LCD Bit Banged Project Information LCD BitBanged Project Information Chip External SRAM Ports Chip External SRAM Parts Pot PotB PortC Port D Port E PotA PotB Pot C PotD Port E Data Direction Pullup Output Value Data
50. t 1 Bit 4 Bit 5 _In T Bits Bit5 Out 1 Bits Bit6 _In U Bit Bit6 Out 1 BitG Bit In T Bit Bit Out 1 Bit Figure 4 7 Screenshot of CodeWizardAVR Ports setup for PORTC From left to right PORTC default setup PORTC after toggling all values 4 1 1 8 Select the USART tab check both Receiver and Transmitter and change the Baud Rate to 115200 The settings should match those given by Figure 4 8 Analog Comparator SP I2C 1 Wire Analog Comparator SPI l2C 1 Wie LCU Bit B anged Project Information LCU Bit B anged Project Information Chip External SRAM Ports Chip External SRAM Ports External IRG Timers USART External IRG Timers USART Receiver Receiver As Interrupt Transmitter Transmitter Tx Interrupt Baud Rate 195200 w 1 x2 Baud Rate Eror 0 22 Communication Parameters 8 Data 1 5top No Parity 4 Mode Asynchronous wt Figure 4 8 Screenshot of CodeWizardAVR USART setup From left to right USART default setup USART after enabling Receiver and Transmitter and setting the Baud Rate Vincent A Rosa Florida Gulf Coast University Page 6 of 50 Spring 2009 Atmel AVR STK500 Communicating with a Host PC and Temperature Sensor User Manual 4 1 1 9 Goto the File menu and select Generate Save and Exit as seen in Figure 4 9 4h CodeWizardAVR untitled cwp File Edit Help Ty New Open H Save ac T IE Save As ct Informa 7 Fort ia Program Prev
51. t stdio h gt 7 Contains printt and sorintt include lt delay h gt Contains delay_ms include lt stdlibuwh gt Contains abs x x The int 1lm7 75_temperature_10 unsigned char chip function returns the temperature in degrees C times 10 retrieved from Vincent A Rosa Florida Gulf Coast University Page 13 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor the LM75 sensor with the address chip CAUTION A 300ms delay must be present between two successive calls to this LUNE Lom ry Get the temperature as an integer in degrees Celcius times 10 tempC_x10 lm7 5_temperature_10 0 PORTC PORTC toggle LED values Send the temperature data via USART Divide by 10 to get the proper whole number temperature Append the the decimal value of the temperature to one place by iJ Using modulus 10 princi aisa Un tenpe 10710 cabs tenpe x1 0410 F PORTC PORTC Delay for DELAY_ms amount of time delay_ms DELAY_ms e 4 1 1 12 Perform as given e 4 1 1 13 Perform as given in this case however all of the files compiled and built are from the C file given by stk500_daq_temp c e 4 1 1 14 Perform as given This concludes creating the software that correlates with the DAQ system formed between the STK500 PCB and myTWI Temperature Sensor The CodeVisionAVR User Manual 13 has
52. them so they do Notice how the SDA Bit is set to 0 and the SCL Bit is set to 1 This parallels the hardware setup established in the Hardware Connectivity section 2 3 2 Vincent A Rosa Florida Gulf Coast University Page 12 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor External IAG Timers USART LCD Bit B anged Project Information Chip External SRAM Ports Analog Comparator SP 2 1 Wire l2 Port PORTE SDA Bit 0 a SCLBt 1 LM75 D51621 PCFS563 Fi 4 v Enabled Addess M 0 _ Output Active High Temperature L Hyst 75 40 5 80 34 Figure 4 14 Screenshot of the CodeWizardZVR I2C setup The I2C Port is set to PORTE and LM75 is set as Enabled 4 1 3 3 Perform steps 4 1 1 9 through 4 1 1 13 with the following revisions e 4 1 1 9 Perform as given e 4 1 1 10 The same directory can be used C Documents and Settings Administrator My Documents but create a different folder say STKS00_DAQ_ Temp Also use a different name to save the files given by the series of pop up windows say stk500_daq_temp e 4 1 1 11 Add the following code from Appendix section A 2 2 1 instead of the code originally given at this step the areas the following code 1s added are relatively located at the beginning and end of the program given in section A 2 2 1 of the appendix Standard Input Output functions finclude l
53. y Network Save as type C Compier fiet e Cancel bly Hetaa Save as lype Project files pri w Lancel Save C cvavreval bin untitled cwp As AX 1 E i Savein E STKS00 TestPiog w vy cE fie ay a My Recent Documents ie Desktop oy Hy Documents Pi tly Computer eJ File name atk 500_tast_prog t Sav Y hy Netwwcrk Save as lype Codetwizard VR project files cwpl w Cancel I Figure 4 10 From left to right top to bottom pop up window to save the C source file c extension pop up window to save the C project file prj extension pop up window to save the Code VisionAVR project file cwp extension 4 1 1 11 Add the following code to the same areas shown in the program given in Appendix section A 2 1 these areas are relatively located towards the beginning and end of the provided code include lt delay h gt Contains delay_ms Send the following message via USART communication printf USART Communication Test Succeeded r n Check state of PORTA Pins if PINA OxFF Vincent A Rosa Florida Gulf Coast University Page 8 of 50 Spring 2009 Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor Tf a button is pressed input pulled low toggle bits on PORTC POR LC PORTC Send the following message via USART communication priantt Hello r n Delay so flashing LED

Section 4. Application Programming

Contents

Download Pdf Manuals

Related Search

Related Contents