Section 4.3 - Florida Gulf Coast University
Contents
1. 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 6 of 6 Spring 20092. Atmel AVR STK500 Communicating with a User Manual Host PC and Temperature Sensor 4 Application Programming 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 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 programmed 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
3. 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 1 of 6 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 Programs 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 Gela
4. hown 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 5 of 6 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 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
5. l 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 4 of 6 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 HyperTerminal 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 s
6. m 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 Wizard 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 2 of 6 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 Hy
7. perTerminal 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 These settings Vincent A Rosa Florida Gulf Coast University Page 3 of 6 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 protoco
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