物联网开发笔记（16）- 使用Wokwi仿真micropython on ESP32开发板实现跑马灯（4个LED）

今天我们再来分享一个流水灯，也叫跑马灯哈！

一、目的

        使用Wokwi仿真micropython on ESP32开发板实现跑马灯（4个LED）

二、环境

仿真网站Wokwi，语言MicroPython，开发板ESP32

三、代码解析

main.py：

from machine import Pin
import machine
import time
 
# 定义每个角，脚的状态为输出。
pins = [machine.Pin(p, machine.Pin.OUT) for p in [32,33,25,26]]
 
def setPins(values):  # 定义每个脚的值，也就是每个灯的值
    for i in range(4):
       pins[i].value(values[i])
 
def runLed(speed):  # 定义跑马灯函数
    while True:  # 写一个死循环
       setPins([1,0,0,0])  # 一次传给每个LED灯的值，值为1对应的灯亮
       time.sleep_ms(speed)  # 设置跑马灯的速度
       setPins([0,1,0,0])
       time.sleep_ms(speed)
       setPins([0,0,1,0])
       time.sleep_ms(speed)
       setPins([0,0,0,1])
       time.sleep_ms(speed)
 
runLed(200)  # 运行跑马灯函数

diagram.json：

{
  "version": 1,
  "author": "Anonymous maker",
  "editor": "wokwi",
  "parts": [
    {
      "type": "wokwi-esp32-devkit-v1",
      "id": "esp",
      "top": 0,
      "left": 0,
      "attrs": { "env": "micropython-20220618-v1.19.1" }
    },
    {
      "type": "wokwi-led",
      "id": "led1",
      "top": -65.43332926432292,
      "left": -185.83333333333334,
      "attrs": { "color": "red" }
    },
    {
      "type": "wokwi-led",
      "id": "led2",
      "top": -64.43,
      "left": -151.5,
      "attrs": { "color": "green" }
    },
    {
      "type": "wokwi-led",
      "id": "led3",
      "top": -65.44,
      "left": -117.84,
      "attrs": { "color": "blue" }
    },
    {
      "type": "wokwi-led",
      "id": "led4",
      "top": -63.76,
      "left": -80.17,
      "attrs": { "color": "yellow" }
    }
  ],
  "connections": [
    [ "esp:TX0", "$serialMonitor:RX", "", [] ],
    [ "esp:RX0", "$serialMonitor:TX", "", [] ],
    [ "led4:A", "esp:D32", "gold", [ "v0" ] ],
    [ "led3:A", "esp:D33", "blue", [ "v0" ] ],
    [ "led2:A", "esp:D25", "green", [ "v0" ] ],
    [ "led1:A", "esp:D26", "red", [ "v0" ] ],
    [ "led1:C", "esp:GND.2", "black", [ "v0" ] ],
    [ "led4:C", "esp:GND.2", "green", [ "v0" ] ],
    [ "led3:C", "esp:GND.2", "green", [ "v0" ] ],
    [ "led2:C", "esp:GND.2", "green", [ "v0" ] ]
  ]
}

实现效果：

好了。大家也可以点击下方链接查看具体代码和实效：

Wokwi Arduino and ESP32 Simulatorhttps://wokwi.com/projects/343093459991659090

 如果你想要实现8个，12个LED的闪烁效果，只需把列表加长，即可实现，快动手试试吧！欢迎评论区留言，谢谢！