The University of Queensland School of Information Technology and Electrical Engineering Semester 2, 2005 CSSE1000 PROJECT

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1 Objective The University of Queensland School of Information Technology and Electrical Engineering Semester 2, 2005 CSSE1000 PROJECT Due: 5pm Friday October 28 Late penalties apply after: 5pm Monday October marks maximum correspond to 10% of the course mark As part of the assessment for this course, you are required to complete a project which will test you against some of the more practical learning objectives. The project will enable you to demonstrate your understanding of either: 1. Microcontroller and Assembler Assembler programming Assembler programming for the AVR Embedded System development The AVR development tools; 2. C programming on microcontroller C programming C programming for the AVR Serial and Terminal IO The AVR GCC compiler and associated tools. You are required to implement the core functionalities of a stop watch. If you develop additional features for this stop watch (as described in this document), you will be given more marks. Some additional features are worth more marks than others. You can complete this project individually or in teams of TWO. The assessment details are listed at the end of this document, and the marks given are different for teams and individuals. You may only choose ONE of the following options: 1. Microcontroller and Assembler, 2. C Programming on microcontroller. Option 1 is for those who would like to work on hardware level, enjoy direct control of the hardware resources and would like to improve the knowledge on assembler programming. The core functionalities can be implemented easily, but the additional features will be more complex to build and/or code. Option 2 is for those who would like to program at higher level, such as C. You will need to learn and use more tools at the beginning, even before you can implement the core functionalities. Once this hurdle is passed, it is easier and quicker to implement additional features as needed. Choose ONE OPTION ONLY and choose it wisely to suit YOU. CSSE1000 Project, Semester 2,

2 Project Description Option 1: Microcontroller and Assembler Project Setup The four digits on the seven segment display of the logic workstation will be connected to the Atmel AVR development board as follows: 0000 Digit 0: MSB PB7 PB6 PB5 LSB PB4 Digit 1: Digit 2: Digit 3: MSB PB3 MSB PA7 MSB PA3 PB2 PA6 PA2 PB1 PA5 PA1 LSB PB0 LSB PA4 LSB PA0 /LE GND (7-seg is enabled by default) Push-button 0 is connected to pin PD2, push-button 1 is connected to pin PD3. The piezo speaker is connected to pin PD4-5. Toggle switches 0 to 3 are connected to pin PC0-3 if necessary. LEDs 4 to 7 are connected to pin PC4-7 if necessary. You must implement the core functionalities and the additional features in assembler language. Core functionalities When the ATMEL AVR development board is switched on, the 7-segment display on the logic workstation will show When a user presses push-button 0 (Start/Stop/Reset button), the stop watch will start. The display shows lapsed time from 0.0sec to sec (in decimal) in 0.1sec resolution/accuracy. The right most digit is one-tenth of a second, and the left most digit is hundred seconds, for example, 1234 means that seconds has lapsed since start. The displayed time must be in decimal at all times. When a user presses push-button 0 again, the stop watch will stop. The 7- segment display will show the time lapsed. When a user presses push-button for the third time, the display will reset to zero ( 0000 ), and ready for next use. Lap Button If the user presses push-button 1 (lap time button) while the stop watch is running, the display will stop and show the lap time. However, the timer is still running in the background. The lap time will be shown for 3 seconds (or until the user presses the Start/Stop/Reset button, whichever is shorter in duration) and the running time is put back on the seven segment display. CSSE1000 Project, Semester 2,

3 Sound for Push-buttons Whenever a button is pushed, a short beep is generated on the piezo speaker. Clock Ticks Every five seconds while running in stop watch mode, it makes a short beep of a different tone (to that of the push-button sound) on the piezo speaker. Clock Blinks LED 4 is toggled every second, and is initially turned off. Lap Button 2 Whenever the lap button is pressed while the stop watch is running, the time is recorded. The stop watch must store up to 15 lap times. The stop watch will NOT record any further lap button presses. When the stop watch is stopped, and if the user presses the lap button, it will show the stored lap times. The (up to 15) lap times will be shown in sequence as the user presses the lap time button. When the display is reset, the lap times are cleared. Count-Down 1 If toggle switch 0 is set to 1 when the display is showing 0000, the stop watch is in count down mode. Based on the setting of toggle switch 1 to 3, the stop watch will count down a specific amount of time when started: Toggle Switch 1 to 3 Preset count down time OFF, OFF, OFF (000) 10 sec OFF, OFF, ON (001) 20 sec OFF, ON, OFF (010) 40 sec OFF, ON, ON (011) 80 sec ON, OFF, OFF (100) 110 sec ON, OFF, ON (101) 120 sec ON, ON, OFF (110) 140 sec ON, ON, ON (111) 180 sec Of course, if the toggle switch 0 is set to 0, it will work as per normal. Count-Down 2 If toggle switch 0 is set to 1 when the display is showing 0000, the stop watch is in count down mode. If a user presses the lap-button at this stage, the display will be incremented by 1 second. This will disable the other toggle switch settings (in countdown 1) if necessary. The stop watch will start counting down from this value. Of course, if the toggle switch 0 is set to 0, it will work as per normal. Advanced Feature of Your Choice (Advanced Level) Feel free to implement other advanced features. The number of marks which may be awarded will vary depending on the judged level of difficulty or creativity involved. You can only receive marks for your own advanced features if you have successfully completed at least 5 additional features. CSSE1000 Project, Semester 2,

4 Program Description Option 2: C Programming on Microcontroller Project Setup Push button 0 is connected to PD2, push button 1 is connected to PD3. The piezo speaker is connected to PD4-5. You must implement the core functionalities and the additional features in C. You should name the various files in your program according to the groups of related functions. The file names which you MUST use is project.c, serialio.c and terminalio.c. The corresponding.h files show the functions that are intended to be accessible from other files. Here s a suggestion of the file names: project.c this is the main file that contains the main loop. serialio.c this is similar to that seen in the pracs it is responsible for handling serial input and output using interrupts and maps the standard IO routines (e.g. printf) to use the serial interface. terminalio.c this encapsulates the sending of various escape sequences so you can call these functions (declared in terminalio.h) instead of remembering various escape sequences. digits.c this encapsulates the state of the digits display.c this file contains functions for outputting everything to the terminal. All display interaction happens via functions in this file (which itself uses printf and the terminalio functions). laptime.c a module for keeping track of lap times. timer.c functions for providing time functions. And any other files which you need. Core functionalities At the start, the terminal program in Windows shows: o Lapse Time: 000 seconds o Status: Ready to start When a user presses push-button 0 (Start/Stop/Reset button), the stop watch will start. The lapse time on the screen will start incrementing at 1 second resolution. The status line will be changed to Status: Running. The displayed time must be in decimal at all times. When a user presses push-button 0 again, the stop watch will stop incrementing the time. The lapse time will display the duration of the runtime. The status line will be changed to Status: Stopped. When a user presses push-button for the third time, the screen will reset to zero (Lapse Time: 000 seconds), and the status is back to Status: Ready to start. Splash Screen Modify the program so that when it starts (i.e. the AVR microcontroller is reset) it displays a message giving a title screen and your name(s). This should be displayed for several seconds before the stop watch program commences. Reset Add a feature so that if the r key is pressed (lower case or upper case), the stop watch is reset (at any time, irrespective of anything in progress). CSSE1000 Project, Semester 2,

5 Colour Draw a colour border around the display. Use different colours for the various displayed text for easy reading. At least four different colours must be used, for example, red, yellow, white and black. Lap Button 1 While the stop watch is running, if the user presses push-button 1 (lap time button), a line will be shown on screen Lap Time: xxx seconds (where xxx is the lap time). Each time the lap button is pressed, the line is over-written with the new lap time. Sound Effects Whenever a button or a key on the keyboard is pushed, a short beep is generated by the piezo speaker. Every five seconds while running in stop watch mode, it makes a short beep of a different tone (to that of the push-button sound) on the piezo speaker. Lap Button 2 Whenever the lap button is pressed while the stop watch is running, the time is recorded. The stop watch must store and display up to 8 previous lap times. 11 lines, each show Previous Lap Time X: yyy seconds, where X is 1 to 8 and yyy is the lap times, must be shown on the screen. If the lap button is pressed more than 8 times, the oldest displayed time is replaced with the new entry. When the display is reset, the lap times are cleared. Count-Down Add a menu system such that an additional count-down mode can be chosen. The user will input the amount of time (in seconds) on the keyboard to the microprocessor. When the Start/Stop/Reset button is pushed, the stop watch will count down from that input. Game Mode Add a menu system such that an additional game mode can be chosen. This game will start by telling users a specific amount of time ranged from 0 to 15 seconds (eg. 5 seconds). When the user is ready, the Start/Stop/Reset button is pressed. The user must now estimate the time lapse, and press the Start/Stop/Reset button when the time is up. The game will then show the user the ACTUAL amount of time lapsed. If no response was received from the user 30 seconds after the start of the game, the game will end automatically. Advanced Feature of Your Choice (Advanced Level) Feel free to implement other advanced features. The number of marks which may be awarded will vary depending on the judged level of difficulty or creativity involved. You can only receive marks for your own advanced features if you have successfully completed at least 5 additional features. Implementation Issues using C Memory Size The program and data memory of the AVR are limited in size. There is sufficient space to implement the features above but you may need to be careful how you do it. You may also face a problem of the stack growing into variable storage areas of the RAM which may cause your program to behave unexpectedly (e.g. freeze). Be careful with the size of any array variables you declare. You are advised not to use significant recursion. In extreme circumstances you may need to reduce the size of the buffers allocated for serial input and output but be aware that this may have other consequences. CSSE1000 Project, Semester 2,

6 You should review the notes in prac 10 about segment sizes, in particular you should monitor the.text,.data and.bss segment sizes of the code you generate. Assessment The core functionalities and the additional features will be worth the number of marks shown on the assessment sheet. Part marks will be awarded for a feature if only some part(s) of the feature has/have been implemented or if there are minor bugs/problems with your implementation. You should ONLY do either option 1 or option 2, but NOT both. If you do both options, the maker will randomly choose one of them to mark. You will not receive any additional mark for doing the work in the other option. Submission Details The due date for the project is 5pm Friday October 28, 2005, but no late penalties will apply for submission up until 5pm Monday October 31, The project must be submitted via the ITEE online submission system at with supporting material (see below) to be submitted on paper. You must electronically submit All of the source files (eg..asm,.c,.h and makefile) necessary to build your project; A copy of your final.hex file (suitable for downloading to the Flash memory of the AVR microcontroller) make a copy your final.hex file (eg. project.hex) and rename it to csse1000.hex You may make multiple submissions, but only the last submission will be marked. It is recommended to put all the files into one zip file for submission. You must also submit the form shown on the last page of this document to the CSSE1000 submission box. This will specify which features you have implemented as an aid to marking. If you have not specified that you have implemented a particular feature, we will not test for it. For those students working in a group, only one student should submit the files and only one copy of the feature summary should be submitted on paper. Students working in a group must also both print and complete the acknowledgement of originality declaration (which will be generated as part of the online submission process) and put the declaration into the submission box. For students working individually, the online declaration is sufficient you should only submit the feature summary on paper. The paper submission deadline is the same as that for electronic submission but will not affect the calculation of any late penalty. Failure to submit the feature summary by the time of marking may mean that some of your features are missed during marking (and we will NOT remark your submission). Failure of a group to submit the declaration form signed by both students will result in a mark of 0 for the project. CSSE1000 Project, Semester 2,

7 Assessment Process Your project will be assessed during the revision period (from 1 November). You have the option of being present when the assessment is taking place, but whether you are present or not should not affect your mark (provided you have submitted the feature summary). Arrangements for the assessment process will be publicised closer to the time. Late Submissions Submission after 5pm Monday October 31 will result in a penalty of 10 marks plus 10 marks per working day or part thereof. For example, a submission less than one working day late (i.e. submitted after 5pm Monday October 31 and before 5pm Tuesday November 1) will be penalised 20 marks, less than two working days late 30 marks and so on. Requests for extensions should be made to the course coordinator (before the due date) and be accompanied by documentary evidence of extenuating circumstances (e.g. medical certificate). The application of any late penalty will be based on your last submission time. Academic Merit, Plagiarism, Collusion and Other Misconduct You should read and understand the statement on academic merit, plagiarism, collusion and other misconduct contained within the course profile and the document referenced in that course profile. You must not share your source files with any other student/group under any circumstances. You must not copy code from any other student/group. All submitted files will be subject to electronic plagiarism detection and misconduct proceedings will be instituted against students where plagiarism or collusion is suspected. The electronic plagiarism detection can detect similarities in code structure even if comments, variable names, formatting etc are modified. If you copy code, you will be caught. The likely penalty for a first offence is a mark of 0 for the project. Notification of Results Students will be notified of their results at the time of project marking (if they are present) or later via their My Record course web page. CSSE1000 Project, Semester 2,

8 The University of Queensland School of Information Technology and Electrical Engineering CSSE1000 Project Feature Summary, Semester 2, 2005 Student #1 Student #2 (if group) Student Number Last Name Given Names Signature You must complete this form and submit it to one of the CSSE1000 submission boxes (on Level 1 of GP South) by 5pm Monday October 31, (After this time submit to the ITEE office.) Students working in a group of two should attach the originality declaration generated during the submission process. No coversheet is necessary. I have chosen to do: 1. Microcontroller and Assembler (fill in table 1) 2. C Programming on microcontroller (fill in table 2) Table 1 Features (1) if attempted Student comment (Anything you want the marker to consider or know?) Marker comment Mark (out of indiv/group) Core functions 40/30 Lap Button 1 10/7 Sound for PB 8/5 Clock Ticks 8/5 Clock Blinks 8/5 Lap Button 2 20/14 Count-Down 1 25/20 Count-Down 2 20/14 Advanced TOTAL: (max of 100) Table 2 Features (2) if attempted Student comment (Anything you want the marker to consider or know?) Marker comment Mark (out of indiv/group) Core functions 40/30 Splash Screen 10/7 Reset 10/7 Colour 5/3 Lap Button 1 10/7 Sound Effects 5/3 Lap Button 2 15/11 Count-Down 15/11 Game Mode 25/18 Advanced TOTAL: (max of 100)

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