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@aykevl aykevl/fire.py
Last active Aug 8, 2019

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FastLED animations for MicroPython, see: https://forum.micropython.org/viewtopic.php?f=15&t=3749
import machine
import pixels
import array
import urandom
import time
# Source:
# https://github.com/FastLED/FastLED/blob/master/examples/Fire2012WithPalette/Fire2012WithPalette.ino
heatColors = array.array('L', [0x000000,
0x330000, 0x660000, 0x990000, 0xCC0000, 0xFF0000,
0xFF3300, 0xFF6600, 0xFF9900, 0xFFCC00, 0xFFFF00,
0xFFFF33, 0xFFFF66, 0xFFFF99, 0xFFFFCC, 0xFFFFFF])
COOLING = 55
SPARKING = 120
l = pixels.Pixels(machine.Pin(15), 150, pixels.GRB)
cells = pixels.Array(len(l), 16)
vals = pixels.Array(len(l), 16)
while True:
start = time.ticks_us()
# Step 1. Cool down every cell a little
vals.random((((COOLING * 10) / len(l)) + 2) / 255.0)
cells -= vals
# Step 2. Heat from each cell drifts 'up' and diffuses a little
vals[:] = cells[:] # copy contents
vals.itruediv(3)
cells.fill(0)
cells[1:] += vals
cells[2:] += vals
cells[2:] += vals
# Step 3. Randomly ignite new 'sparks' of heat near the bottom
if urandom.getrandbits(8) < SPARKING:
y = urandom.getrandbits(3)
cells[y] = min(0.62, urandom.getrandbits(8)/255)
# Step 4. Map from heat cells to LED colors
l.fill_palette_array(heatColors, cells, 0.25);
l.write()
stop = time.ticks_us()
print('fps:', 1000000/(stop-start))
time.sleep(0.10)
import machine
import pixels
import time
# Source:
# https://gist.github.com/kriegsman/964de772d64c502760e5
l = pixels.Pixels(machine.Pin(15), 150, pixels.GRB)
hues = pixels.Array(len(l), 16)
sats = pixels.Array(len(l), 16)
vals = pixels.Array(len(l), 16)
hue = 0
lastMillis = 0
pseudoTime = 0
while True:
start = time.ticks_us()
# https://gist.github.com/kriegsman/964de772d64c502760e5
hue = (hue + pixels.beatsin(1.56, 0.00007, 0.00013)) % 1;
hues.range(hue, pixels.beatsin(1.57, 0.0001, 0.046))
sats.fill(pixels.beatsin(0.34, 0.86, 0.98)) # almost invisible
ms = time.ticks_ms()
deltams = ms - lastMillis
lastMillis = ms
pseudoTime += deltams + pixels.beatsin(0.58, 0.09, 0.24)
vals.range((pseudoTime / 1024) % 1, pixels.beatsin(0.8, 0.097, 0.16))
vals.sin()
vals.imul(vals)
brightdepth = pixels.beatsin(1.34, 0.38, 0.88)
vals.scale(brightdepth)
vals += (1 - brightdepth)
vals.scale(0.50)
l.fill_rainbow_array(hues, sats, vals)
l.reverse()
l.write()
stop = time.ticks_us()
#print('fps:', 1000000/(stop-start))
time.sleep(0.01)
import pixels
import machine
import time
l = pixels.Pixels(machine.Pin(15), 150, pixels.GRB)
hue = 0
while True:
hue = (hue + 0.005) % 1
l.fill_rainbow(hue, -0.02)
l.write()
time.sleep(0.01)
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