Lab 2: LED Changer

Program (20 points)

Write a program that meets the following specification exactly:

1) For 1/4 of a second the 4 red motor leds are on.
2) For 1/4 of a second the 4 green motor leds are on.
3) For 1/4 of a second all leds are off.
4) Restart loop at number 1 of the specifications.

Notes:

• One second for a 2 MHz clock is equal to 2,000,000 cycles; therefore, 1/4 of a second would equal 500,000 cycles.
• You should comment your code such that it is clear that once you store the value needed to setup the leds for the current 1/4 second specification until the value is stored to switch to the next leds specification is exactly 500,000 cycles (no, not 499,999 or 500,001).
• Each lab partner must turn in a copy of the assembly language program.
• The comments at the top of the program should indicate:
  • Who the author is of the program
  • Who you worked with on the program

Demonstration (10 points)

You may demonstrate the downloading of the program as a partnership or alone, but both partners must be present to demonstrate as a partnership.

For this lab,

• you must hand in the assemby language file (.asm) using the Web Submission page.
• you must demonstrate your program works on your newly built board to either the Instructor or TA.