ELEC 2220 Project - ELEC 2220 System Design Project Due at...

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ELEC 2220 – System Design Project Due at time of last class: Monday, August 2 You are to design a keyless entry system for a laboratory. The system is to comprise an HCS12 microcontroller, a keypad, an LCD display, and a door latch mechanism. For this project, the simulated keypad and LCD components provided with CodeWarrior are to be used. The door latch mechanism is to be simulated with an LED that will be turned ON, to simulate unlocking the door (showing activation of a door latch opening mechanism), and OFF, to simulate locking the door (deactivating the door latch opening mechanism). Operation of the system is as follows. 1. When the door is locked, the LCD should display the prompt “ Enter code :”, and the door latch mechanism should be OFF. 2. A user who wishes to enter the lab must enter a four-digit personal ID code on the keypad. The LCD should display asterisks, in lieu of the four digits, following the “Enter code” prompt. For example: Enter code: **** 3.
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