ECE482 Final ProjectSpring 03

SpecificationDesign a digital thermometer to report the temperature in the room in degrees Fahrenheit.

The PC should update the room temperature once each second.

A display as simple as the following is acceptable:

Present room temperature is 78 degrees Fahrenheit.

While you can have this message scrolling downward, it would be better if the message was updated in place.

Work in teams of 3 (your choosing).

You will demonstrate your project and give a brief oral presentation either before orafter the final exam on Mon May 5 (6:30 – 8:10 pm).

I would prefer that the presentations take place prior to the exam if possible.

Design of a Digital Thermometer

LM34 Thermometer IC

PC Extender Card

Buffering I/O Address Range 300H-31FH

Side View of Extender Card

Interface Trainer Decoding Circuitry

Connector and Cable

I/O Port Addresses Decoded by Trainer

PC Interface Trainer Module

PC Interface Trainer Connection

Simple Program to Test Port A

8255 PPI Chip Pinout

8255 Control Word

Example 4-5

Example 4-6

Writing a Character to the Screen

Writing a Character String to the Screen

Binary to Decimal to ASCII Conversion