CSE 230 Project 2: LED Pattern Generator

Learning Objectives:

Use PLP branch instructions

Read from a memory mapped I/O device

The Task:

Write a program in PLP assembly that repeatedly reads the value of the switches (address: 0xf0100000) and displays a pattern on the LED array based on what switches. Each time the switch value is read, the pattern should be displayed (regardless of whether the switch value has changed or not since the last time it was read). The table below indicates the pattern that should be displayed for each possible switch setting:

Switch Number	Hexadecimal Switch Value	Binary Switch Value	Decimal Switch Value	LED Pattern
0	0x00000001	0b00000001	1	Turn on all 8 LEDs and then turn off all 8 LEDs
1	0x00000002	0b00000010	2	Turn on all even numbered LEDs and then turn off all 8 LEDs
2	0x00000004	0b00000100	4	Turn on all odd numbered LEDs and then turn off all 8 LEDs
3	0x00000008	0b00001000	8	Cycle through all 8 LEDs in order with only one LED on at a time (a marquee)
Other	Other	Other	Other	All LEDs off