Due:  End of Lab Session (10.21.2013)

Requirement:  Bread Board, Jump Wires, MSP430, 7-segment display and show your work

Part #1 – Countdown Single Digit Display

Create an assembly language program that interfaces with a 7-segment LED display. The display should start at 9 and countdown to 0, displaying each digit for exactly 1 second. When the counter reaches 0, it should then go back to 9 and then repeat countdown.

Two-digit 7-segment Pin-out Sheet

You should use a resistor of 390 Ohms or less in your circuit to avoid sending too much current into the MSP430 port:

C.A => Common Anode. To see difference between Common Anode vs Common Cathode

Since the 7-Segment Display is a C.A => To light up a section, the logic value is ZERO

See how it works

Part #2 – Countdown with Reset

Same as part 1; however, when P1.3 Button is pressed, the program should then reset back displaying digit 9 and counts down displaying each digit for exactly 1 second.  If the button is never pressed, the program should execute part 1 “forever”. Since we are using P1.3 as a Button, we then must replace the "output" values of P1.3 with bit P2.0 as seen below. Therefore, rearrange the program (& circuit) in order for the display to show all digits correctly by using both ports as outputs.

See how it works

Part #3 – Countdown & then UP!

Program starts executing part 1; however, when P1.3 Button is pressed, the program should then display digit 0 and starts counting up to 9 displaying each digit for exactly 1 second.  Once it reaches 9, the program wraps around to 0 and continues to count up to 9.  If the button is never pressed, the program should execute part 1 “forever"

See how it works

Submission:

1 - Have each part of the lab checked out by Matt, Clint or Damian by showing your code, flashing your code to the board, and display working circuit.

2 - Print parts 2 & 3 of the program with the following header:

/***************************************************
* Your Names
* Lab x assignment - Part (2 or 3)
* filename: yyyyyyyyy.asm
*
* Description of the assignment
*
***************************************************/

3 - Make sure you have a well commented code

Copyright © 2011 by Keith Vertanen.