Re: 试着点亮ws2812b
发表于 : 2022年 8月 10日 19:33
pyboardCN V2板子的最新固件版本是v1.18,?
MicroPython、microbit、makecode、开源技术交流,使用技巧
http://www.micropython.org.cn/forum/
http://www.micropython.org.cn/forum/viewtopic.php?f=5&t=3254
代码: 全选
from pyb import Pin, Timer, pwm
tim = Timer(2, freq=800000)
AA = tim.channel(1, Timer.PWM, pin=Pin.cpu.A15)
AA.pulse_width_percent(68)
STM32的板子固件没有集成neopixel,esp32等集成了。可以将micropython源码中drivers\neopixel目录下的neopixel.py复制进去使用。或者复制下面代码
代码: 全选
# NeoPixel driver for MicroPython
# MIT license; Copyright (c) 2016 Damien P. George, 2021 Jim Mussared
from machine import bitstream
class NeoPixel:
# G R B W
ORDER = (1, 0, 2, 3)
def __init__(self, pin, n, bpp=3, timing=1):
self.pin = pin
self.n = n
self.bpp = bpp
self.buf = bytearray(n * bpp)
self.pin.init(pin.OUT)
# Timing arg can either be 1 for 800kHz or 0 for 400kHz,
# or a user-specified timing ns tuple (high_0, low_0, high_1, low_1).
self.timing = (
((400, 850, 800, 450) if timing else (800, 1700, 1600, 900))
if isinstance(timing, int)
else timing
)
def __len__(self):
return self.n
def __setitem__(self, i, v):
offset = i * self.bpp
for i in range(self.bpp):
self.buf[offset + self.ORDER[i]] = v[i]
def __getitem__(self, i):
offset = i * self.bpp
return tuple(self.buf[offset + self.ORDER[i]] for i in range(self.bpp))
def fill(self, v):
b = self.buf
l = len(self.buf)
bpp = self.bpp
for i in range(bpp):
c = v[i]
j = self.ORDER[i]
while j < l:
b[j] = c
j += bpp
def write(self):
# BITSTREAM_TYPE_HIGH_LOW = 0
bitstream(self.pin, 0, self.timing, self.buf)