Want to run 80's Super Computer Example on Interstate 75

Support
1

So far no luck. My setup is two 64 wide by 32 high Hub 75 panels for a combined 128 x 32 matrix. Here is what I have tried so far.

import time
import random
#from cosmic import CosmicUnicorn
#from picographics import PicoGraphics, DISPLAY_COSMIC_UNICORN as DISPLAY

from interstate75 import Interstate75

#gu = CosmicUnicorn()
#graphics = PicoGraphics(DISPLAY)

i75 = Interstate75(display=Interstate75.DISPLAY_INTERSTATE75_128X32, stb_invert=True)
graphics = i75.display

width = 128
height = 32

colour = (230, 150, 0)

@micropython.native  # noqa: F821
def setup():
    global width, height, lifetime, age
    #width = CosmicUnicorn.WIDTH
    #height = CosmicUnicorn.HEIGHT
    width = 128
    height = 32
    lifetime = [[0.0 for y in range(height)] for x in range(width)]
    age = [[0.0 for y in range(height)] for x in range(width)]
    for y in range(height):
        for x in range(width):
            lifetime[x][y] = 1.0 + random.uniform(0.0, 0.1)
            age[x][y] = random.uniform(0.0, 1.0) * lifetime[x][y]


@micropython.native  # noqa: F821
def draw():
    for y in range(height):
        for x in range(width):
            if age[x][y] < lifetime[x][y] * 0.3:
                graphics.set_pen(graphics.create_pen(colour[0], colour[1], colour[2]))
            elif age[x][y] < lifetime[x][y] * 0.5:
                decay = (lifetime[x][y] * 0.5 - age[x][y]) * 5.0
                graphics.set_pen(graphics.create_pen(int(decay * colour[0]), int(decay * colour[1]), int(decay * colour[2])))
            else:
                graphics.set_pen(0)
            graphics.pixel(x, y)

    #gu.update(graphics)
    i75.update(graphics)            


@micropython.native  # noqa: F821
def update():
    for y in range(height):
        for x in range(width):
            if age[x][y] >= lifetime[x][y]:
                age[x][y] = 0.0
                lifetime[x][y] = 1.0 + random.uniform(0.0, 0.1)

            age[x][y] += 0.025


setup()

#gu.set_brightness(0.5)

while True:

    #if gu.is_pressed(CosmicUnicorn.SWITCH_BRIGHTNESS_UP):
        #gu.adjust_brightness(+0.01)

    #if gu.is_pressed(CosmicUnicorn.SWITCH_BRIGHTNESS_DOWN):
        #gu.adjust_brightness(-0.01)

    start = time.ticks_ms()

    draw()
    update()

    # pause for a moment (important or the USB serial device will fail)
    time.sleep(0.001)

    print("total took: {} ms".format(time.ticks_ms() - start))

This gets me the following error.

>>> %Run -c $EDITOR_CONTENT
Traceback (most recent call last):
  File "<stdin>", line 72, in <module>
MemoryError: 
PROBLEM IN THONNY'S BACK-END: Exception while handling 'Run' (thonny.plugins.micropython.mp_back.ManagementError: Command output was not empty).
See Thonny's backend.log for more info.
You may need to press "Stop/Restart" or hard-reset your MicroPython device and try again.


Process ended with exit code 1.

I have no idea what that means?

2

I’m guessing you’re running out of memory for those lifetime / age arrays; you’re trying to wrangle almost four time the pixels (2048, up from 583 on the Galactic Unicorn) and blowing the Pico’s stack.

3

The example I started with is for the Cosmic Unicorn, which as near as I can tell, will be 64 x 64.
pimoroni-pico/eighties_super_computer.py at main · pimoroni/pimoroni-pico (github.com)

That’s the same number of LED’s that I have. My panels are actually arranged in a 64 x 64 configuration. I have to run them in 128 x 32 though. I’m not saying your wrong, just adding the info for clarity.

Interstate 75 with multiple HUB-75 LED matrix panels - Support - Pimoroni Buccaneers

4

Ahh, my bad for assuming it was from the Galactic flavour. I’d still be tempted to reduce your width to, say, 64 and see if it blows up less.

That ‘line 72’ error is particularly unhelpful from Thonny, because that appears to be a commented out line ;)

5

Tried 32x32 and got the same error message.
The error is pointing to
setup()

@hel

6

I got it running at 64 x 32. It just duplicates on both matrixes. I know it can be done now.

import time
import random

#from interstate75 import Interstate75, SWITCH_A, SWITCH_B
from interstate75 import Interstate75, DISPLAY_INTERSTATE75_64X32

i75 = Interstate75(display=DISPLAY_INTERSTATE75_64X32)
graphics = i75.display

i75.set_led(255, 0, 0)

width = 64
height = 32

BLACK = graphics.create_pen(0, 0, 0)
graphics.set_pen(BLACK)
graphics.clear()
i75.update(graphics)

colour = (255, 0, 0)

@micropython.native  # noqa: F821
def setup():
    global width, height, lifetime, age
    width = 64
    height = 32
    lifetime = [[0.0 for y in range(height)] for x in range(width)]
    age = [[0.0 for y in range(height)] for x in range(width)]
    for y in range(height):
        for x in range(width):
            lifetime[x][y] = 1.0 + random.uniform(0.0, 0.1)
            age[x][y] = random.uniform(0.0, 1.0) * lifetime[x][y]


@micropython.native  # noqa: F821
def draw():
    for y in range(height):
        for x in range(width):
            if age[x][y] < lifetime[x][y] * 0.3:
                graphics.set_pen(graphics.create_pen(colour[0], colour[1], colour[2]))
            elif age[x][y] < lifetime[x][y] * 0.5:
                decay = (lifetime[x][y] * 0.5 - age[x][y]) * 5.0
                graphics.set_pen(graphics.create_pen(int(decay * colour[0]), int(decay * colour[1]), int(decay * colour[2])))
            else:
                graphics.set_pen(0)
            graphics.pixel(x, y)

    i75.update(graphics)         


@micropython.native  # noqa: F821
def update():
    for y in range(height):
        for x in range(width):
            if age[x][y] >= lifetime[x][y]:
                age[x][y] = 0.0
                lifetime[x][y] = 1.0 + random.uniform(0.0, 0.1)

            age[x][y] += 0.025


setup()

#gu.set_brightness(0.5)

while True:
    
    #if i75.switch_pressed(SWITCH_A):
        #i75.set_led(255, 0, 0)
    #if i75.switch_pressed(SWITCH_B):
        #i75.set_led(0, 255, 0)    

    start = time.ticks_ms()

    draw()
    update()

    # pause for a moment (important or the USB serial device will fail)
    time.sleep(0.001)

    print("total took: {} ms".format(time.ticks_ms() - start))
1 Like
7

Ops, the Cosmic Unicorn is going to be 32 x 32, not the 64 x 64 I thought. Not sure why I thought it was going to be 64 x 64, maybe because I have 64 x 64 on my brain?
I just snagged the numby / ulab example and a test uf2 off of github to try on my i75.
pimoroni-pico/micropython/examples/cosmic_unicorn at main · pimoroni/pimoroni-pico (github.com)

EDIT: That didn’t work as planned. The PICO W uf2 I found doesn’t have ulab in it. The Galactic Unicorn uf2 does, but doesn’t have the Hub 75 stuff in it.

I have the 80’s super computer with sound numby version running on my GU though.