WS2812/NeoPixel LiteX core test over Bridge.

test_ws2812.py

#!/usr/bin/env python3

import time

from litex import RemoteClient

bus = RemoteClient()
bus.open()

# # #

class NeoPixelLed:
	def __init__(self, n):
		self.n = n

	def write(self, r, g, b):
		bus.write(bus.mems.ws2812.base + 4*self.n, (g << 16) | (r << 8) | (b << 0))

leds = [NeoPixelLed(i) for i in range(64)]

import random
prng = random.Random(42)
while True:
	for n in range(64):
		rand = prng.randrange(100)
		# Blue Flashes.
		if rand > 98:
			leds[n].write(r=0, g=0, b=prng.randrange(2**8))
		# Blue Randomness.
		elif rand > 40:
			leds[n].write(r=0, g=0, b=prng.randrange(2**2))
		else:
			leds[n].write(r=0, g=0, b=0)
		time.sleep(0.001)

# # #

bus.close()