Embedded Systems Design with the Atmel AVR Microcontroller Part II

268 CHAPTER 8. SYSTEM LEVEL DESIGN
8.6. Modify the motor speed control algorithm to display motor direction (CW or CCW) and
speed in RPM on the LCD.
8.7. The Blinky 602A robot under ATmega164 control abruptly starts and stops when PWM
is applied. Modify the algorithm for a gradual ramp up (and down) of the motor speed.
8.8. Modify the Blinky 602A circuit and microcontroller code such that the maximum speed of
the robot is set with an external potentiometer.
8.9. Modify the Blinky 602A circuit and microcontroller code such that the IR sensors are only
asserted just before a range reading is taken.
8.10. Apply embedded system design techniques presented throughout the text to a project of
your choosing. Follow the design process and provide the following products:
system description,
system requirements,
a structure chart,
system circuit diagram,
UML activity diagrams, and the
microcontroller code.
8.11. Add the following features to the Blinky 602A platform:
Line following capability (Hint: adapt the line following circuitry onboard the Blinky
602A to operate with the ATmega164.)
Two way robot communications (use the onboard IR sensors)
LCD display for status and troubleshooting display
Voice output (Hint: use an ISD 4003 Chip Corder)
8.12. Develop an embedded system controlled submarine (www.seaperch.org).
8.13. Equip the ATmega164 with automatic cell phone dialing capability to notify you when a
fire is present in your home.
8.14. Develop an embedded system controlled dirigible/blimp
(www.microflight.com,www.rctoys.com).
8.15. Develop a trip odometer for your bicycle (Hint: use a Hall Effect sensor to detect tire
rotation).
8.16. Develop a timing system for a 4 lane pinewood derby track.