用ESP32+MicroPython+Thonny点亮WS2812灯带
本帖最后由 gada888 于 2019-4-30 14:31 编辑尽管python的编程软件很多，anaconda，pycharm or python ide.个人认为最好用的是Thonny。虽然做AI项目时候可能需要用pyCharm这类的去编程。但低级别单片机是上的py编程一定选Thonny了。这次就是用Thonny环境来给ESP32单片机和RGB灯带硬件编程。
这是Thonny主界面了。
Thonny下载地址
选定端口
选MicroPython主控
先输入一段程序，测试下ESP32上的LED的显示
import machine, neopixel
import time
n = 14
# strip control gpio
p = 14
np = neopixel.NeoPixel(machine.Pin(p), n)
# set single pixel (1st pixel = index ) to red color
np = (255, 0, 0)
np.write()
time.sleep(1)
# set strip color
def set_color(r, g, b):
for i in range(n):
np = (r, g, b)
np.write()
set_color(0, 0, 255)
time.sleep(1)
# fade in/out
def fade_in_out(color, wait):
for i in range(0, 4 * 256, 8):
for j in range(n):
if (i // 256) % 2 == 0:
val = i & 0xff
else:
val = 255 - (i & 0xff)
if color == 'red':
np = (val, 0, 0)
elif color == 'green':
np = (0, val, 0)
elif color == 'blue':
np = (0, 0, val)
elif color == 'purple':
np = (val, 0, val)
elif color == 'yellow':
np = (val, val, 0)
elif color == 'teal':
np = (0, val, val)
elif color == 'white':
np = (val, val, val)
np.write()
time.sleep_ms(wait)
#fade_in_out('red', 0)
fade_in_out('green', 10)
#fade_in_out('blue', 25)
#fade_in_out('purple', 10)
fade_in_out('yellow', 10)
fade_in_out('teal', 10)
#fade_in_out('white', 10)
time.sleep(1)
# bounce
def bounce(r, g, b, wait):
for i in range(4 * n):
for j in range(n):
np = (r, g, b)
if (i // n) % 2 == 0:
np = (0, 0, 0)
else:
np = (0, 0, 0)
np.write()
time.sleep_ms(wait)
bounce(255, 0, 125, 50)
time.sleep(1)
# cycle
def cycle(r, g, b, wait):
for i in range(4 * n):
for j in range(n):
np = (0, 0, 0)
np = (r, g, b)
np.write()
time.sleep_ms(wait)
cycle(0, 255, 0, 50)
time.sleep(1)
# function to go through all colors
def wheel(pos):
# Input a value 0 to 255 to get a color value.
# The colours are a transition r - g - b - back to r.
if pos < 0 or pos > 255:
return (0, 0, 0)
if pos < 85:
return (255 - pos * 3, pos * 3, 0)
if pos < 170:
pos -= 85
return (0, 255 - pos * 3, pos * 3)
pos -= 170
return (pos * 3, 0, 255 - pos * 3)
# rainbow
def rainbow_cycle(wait):
for j in range(255):
for i in range(n):
rc_index = (i * 256 // n) + j
np = wheel(rc_index & 255)
np.write()
time.sleep_ms(wait)
rainbow_cycle(10)
rainbow_cycle(5)
time.sleep(1)
# turn off all pixels
def clear():
for i in range(n):
np = (0, 0, 0)
np.write()
clear()
测试ws2812b彩灯带。
用cat /main.py命令测试主程序
用%lsdevice命令测试ESP32里有什么程序，
点击三角运行按钮，可以运行程序，但并没有烧录到ESP32里。
要在device里运行点击激活如上功能。上传程序。
最后因为Thonny并没有能从ESP32里删除文件的功能。很多人用上传空文件的方法达到删除的目的。
# 这个Demo，最新的MicroPython跑不起来的更正代码： from machine import Pin from neopixel import NeoPixelp=25 n=64 #初始化 p = Pin(p, Pin.OUT) np = NeoPixel(p, n)# set single pixel (1st pixel = index ) to red color np = (255, 0, 0) np.write() time.sleep(1)# set strip color def set_color(r, g, b): for i in range(n): np = (r, g, b) np.write()set_color(0, 0, 255) time.sleep(1)# fade in/out def fade_in_out(color, wait): for i in range(0, 4 * 256, 8): for j in range(n): if (i // 256) % 2 == 0: val = i & 0xff else: val = 255 - (i & 0xff) if color == 'red': np = (val, 0, 0) elif color == 'green': np = (0, val, 0) elif color == 'blue': np = (0, 0, val) elif color == 'purple': np = (val, 0, val) elif color == 'yellow': np = (val, val, 0) elif color == 'teal': np = (0, val, val) elif color == 'white': np = (val, val, val) np.write() time.sleep_ms(wait)#fade_in_out('red', 0) fade_in_out('green', 10) #fade_in_out('blue', 25) #fade_in_out('purple', 10) fade_in_out('yellow', 10) fade_in_out('teal', 10) #fade_in_out('white', 10) time.sleep(1)# bounce def bounce(r, g, b, wait): for i in range(4 * n): for j in range(n): np = (r, g, b) if (i // n) % 2 == 0: np = (0, 0, 0) else: np = (0, 0, 0) np.write() time.sleep_ms(wait) bounce(255, 0, 125, 50) time.sleep(1)# cycle def cycle(r, g, b, wait): for i in range(4 * n): for j in range(n): np = (0, 0, 0) np = (r, g, b) np.write() time.sleep_ms(wait)cycle(0, 255, 0, 50) time.sleep(1)# function to go through all colors def wheel(pos): # Input a value 0 to 255 to get a color value. # The colours are a transition r - g - b - back to r. if pos < 0 or pos > 255: return (0, 0, 0) if pos < 85: return (255 - pos * 3, pos * 3, 0) if pos < 170: pos -= 85 return (0, 255 - pos * 3, pos * 3) pos -= 170 return (pos * 3, 0, 255 - pos * 3)# rainbow def rainbow_cycle(wait): for j in range(255): for i in range(n): rc_index = (i * 256 // n) + j np = wheel(rc_index & 255) np.write() time.sleep_ms(wait)rainbow_cycle(10) rainbow_cycle(5) time.sleep(1)# turn off all pixels def clear(): for i in range(n): np = (0, 0, 0) np.write()clear()
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