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import time | |
import board | |
from digitalio import DigitalInOut, Direction | |
import pwmio | |
import math | |
pwm = pwmio.PWMOut(board.TX, frequency=60) | |
pwm.duty_cycle = 0 | |
FULL = 0xFFFF | |
bursts = [ | |
[1, 0], | |
[0.05, FULL], | |
[0.1, 0], | |
[0.05, FULL], | |
[0.1, 0], | |
[0.022, FULL], | |
[0.051, 0], | |
[0.11, 0], | |
[0.03, FULL], | |
[0.012, 0], | |
[10, FULL], | |
] | |
burst_idx = 0 | |
fast_theta = 0 | |
slow_theta = 0 | |
lum = 0 | |
next_at = time.monotonic() | |
fast_mod_depth = 4000 | |
slow_mod_depth = 20000 | |
while True: | |
now = time.monotonic() | |
fast_theta += 0.125 | |
fast_mod = fast_mod_depth + int(math.sin(fast_theta) * fast_mod_depth) | |
slow_theta += 0.0025 | |
slow_mod = int(math.sin(slow_theta) * slow_mod_depth) | |
mod_lum = max(0, min(lum - fast_mod - slow_mod, FULL)) | |
pwm.duty_cycle = mod_lum | |
if now > next_at: | |
duration, lum = bursts[burst_idx] | |
next_at = now + duration | |
burst_idx += 1 | |
if(burst_idx == len(bursts)): | |
burst_idx = 0 |
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