[Digi-Key Follow Me Issue 2] Task 3: Control WS2812B

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[Digi-Key Follow Me Issue 2] Task 3: Control WS2812B [Copy link]

 

Task 3: Use buttons to control the display and color switching of the onboard Neopixel LED

My control idea here is very simple, that is, a short press of the button can switch 7 colors, a long press can directly turn off the colored lights, and a super long press can display the rainbow gradient effect. The touch pin of the esp32s3 board is also used here. The touch pin can use the capacitive touch pin as a button. After a super long press, the pin below the touch board can turn on the rainbow gradient, and touching the pin above will exit.

The effects are as follows: duanan is a short press, changan is a long press, and chaochangan is an ultra-long press.

任务3

code show as below:

import time, board, neopixel, digitalio
from rainbowio import colorwheel
import touchio

color = [(255,0,0), (0,255,0), (0,0,255), (0,255,255),\
         (255,0,255), (255,255,0), (255,255,255), (0,0,0)]
pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=1) #brightness为亮度0到1的小数

button = digitalio.DigitalInOut(board.BUTTON)
button.direction = digitalio.Direction.INPUT
button.pull = digitalio.Pull.UP
touch_one = touchio.TouchIn(board.D12)
touch_two = touchio.TouchIn(board.A4)
state = 0
press_time = 0

def rainbow(delay):
    while not touch_one.value: #是否触摸
        pass
    if touch_one.value:
        while True:
            for color_value in range(255):
                pixel.fill(colorwheel(color_value))
                if touch_two.value:
                    break
                time.sleep(delay)
            if touch_two.value:
                break
    pixel.fill((0,0,0))
        
while True:
    if state >= len(color):
        state = 0
    time.sleep(0.01) #延时消抖
    if button.value == 0:    #按键按下
        while not button.value:  #判断按键是否起来,区别长按短按
            press_time += 0.001
        if 0 <= press_time <= 200:      #3秒左右
            print(press_time, 'duanan')
            pixel.fill(color[state])
            state += 1
        elif 200 < press_time <= 500:
            print(press_time, 'changan') #5s以上
            pixel.fill((0,0,0))
            state = 0
        else:
            print('changchaoan')
            print('touch above begin rainbow show, and touch below exit')
            rainbow(0.002)
            state = 0
        press_time = 0

It was relatively easy to complete, mainly because the neopixel library is very convenient for controlling RGB colored lights, and the official also has related routines. At first, I didn't know how to use pin pins, and I didn't know how to use button GPIO input and output, because it was a little different from the MicroPython function, but I learned it after all.