character: .byte 0,0
box: .byte 0,0
target: .byte 0,0
.globl main
# TODO: Before we deal with the LEDs, generate random locations for
# the character, box, and target. static locations have been provided
# for the (x,y) coordinates for each of these elements within the 8×8
# There is a rand function, but note that it isn’t very good! You
# should at least make sure that none of the items are on top of each
# TODO: Now, light up the playing field. Add walls around the edges
# and light up the character, box, and target with the colors you have
# chosen. (Yes, you choose, and you should document your choice.)
# Hint: the LEDs are an array, so you should be able to calculate
# offsets from the (0, 0) LED.
# TODO: Enter a loop and wait for user input. Whenever user input is
# received, update the grid with the new location of the player (and
# if applicable, box and target). You will also need to restart the
# game if the user requests it and indicate when the box is located
# in the same position as the target.
# TODO: That’s the base game! Now, pick a pair of enhancements and
# consider how to implement them.
# — HELPER FUNCTIONS —
# Feel free to use (or modify) them however you see fit
# Takes in a number in a0, and returns a (sort of) (okay no really) random
# number from 0 to this number (exclusive)
remu a0, a0, t0
# Takes in an RGB color in a0, an x-coordinate in a1, and a y-coordinate
# in a2. Then it sets the led at (x, y) to the given color.
li t1, LED_MATRIX_0_WIDTH
mul t0, a2, t1
add t0, t0, a1
mul t0, t0, t1
li t1, LED_MATRIX_0_BASE
add t0, t1, t0
sw a0, (0)t0
# Polls the d-pad input until a button is pressed, then returns a number
# representing the button that was pressed in a0.
# The possible return values are:
# 3: RIGHT
mv a0, zero
bge a0, t1, pollLoopEnd
li t2, D_PAD_0_BASE
slli t3, a0, 2
add t2, t2, t3
lw t3, (0)t2
bnez t3, pollRelease
addi a0, a0, 1
j pollLoop
pollLoopEnd:
j pollDpad
pollRelease:
lw t3, (0)t2
bnez t3, pollRelease