软硬结合工程师的自我修炼——WS2812b的测试程序

程序说明：按照锂电池电压大小设置呼吸灯速率。电压越大，呼吸速率越慢。

//======================================================================
//
//        Copyright (C) 2020 HKUST_AANTC
//        All rights reserved.
//
//        filename    :  WS2812b_demo
//        description :  WS2812b_demo
//        PCB         :  BMP_Control_Board
//        IDE         :  Arduino IDE 1.8.12
//
//        Created by Frank at 19/03/2020 20:00:00
//        https://lynn1996.github.io/
//
//        Libraries copyright notice:
//
//        [1]
//        NeoPixel Ring simple sketch (c) 2013 Shae Erisson
//        Released under the GPLv3 license to match the rest of the
//        Adafruit NeoPixel library
//
//======================================================================


#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

#include <Wire.h>

#define WS2812_PIN        13
#define NUMPIXELS 1

#define InterruptPin      14 //接收LTC2980关断要求，低电平有效
#define SendCloseCommandPin   12 //接收关断要求并处理好信息准备关断后，该pin向LTC2980发送关断指令，低电平有效


Adafruit_NeoPixel pixels(NUMPIXELS, WS2812_PIN, NEO_GRB + NEO_KHZ800);

#define DELAYVAL 1000 // Time (in milliseconds) to pause between pixels

void LED_FadeDown(int R, int G, int B, int FadeSpeed, int Brightness)
{
  //  for (int i = 0; i < NUMPIXELS; i++) { pixels.setPixelColor(i, 200, 0, 0); }
  pixels.setPixelColor(0, R, G, B);
  for (int j = Brightness; j > 0; j = j - 2)
  {
    pixels.setBrightness(j);
    pixels.show();
    delay(FadeSpeed);
  }
}

void LED_FadeUp(int R, int G, int B, int FadeSpeed, int Brightness)
{
  //  for (int i = 0; i < NUMPIXELS; i++) { pixels.setPixelColor(i, 200, 0, 0); }
  pixels.setPixelColor(0, R, G, B);
  for (int j = 2; j < Brightness; j = j + 2)
  {
    pixels.setBrightness(j);
    pixels.show();
    delay(FadeSpeed);
  }
}

//--------------------------------关断callback函数------------------------------------
ICACHE_RAM_ATTR void shutDown() {
  digitalWrite(SendCloseCommandPin, LOW);
  ESP.restart();//必须加restart才能正常关断也不知是啥bug T_T...
}

//--------------------------------setup-----------------------------------------------
void setup() {
  Serial.begin(500000);
  //Serial.println();
  Wire.begin();
  pinMode(SendCloseCommandPin, OUTPUT);
  digitalWrite(SendCloseCommandPin, HIGH);
  pinMode(InterruptPin, INPUT_PULLUP); //设置关断pin
  attachInterrupt(digitalPinToInterrupt(InterruptPin), shutDown, FALLING);//注册关断callback函数
  pixels.begin();
}
//--------------------------------main loop----------------------------------------------
void loop() {
  float remainingBatteryCapacity = 0.005732 * analogRead(A0);  
  uint8_t fadeSpeed = 50 * (1 - (4.28 - remainingBatteryCapacity) / (4.28 - 3.6));
  Serial.print(remainingBatteryCapacity);
  Serial.print("  ");
  Serial.println(fadeSpeed);


  LED_FadeUp(255, 0, 0, fadeSpeed, 50);
  LED_FadeDown(255, 0, 0, fadeSpeed, 50);

  LED_FadeUp(0, 255, 0, fadeSpeed, 50);
  LED_FadeDown(0, 255, 0, fadeSpeed, 50);

  LED_FadeUp(0, 0, 255, fadeSpeed, 50);
  LED_FadeDown(0, 0, 255, fadeSpeed, 50);

}

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