// 调用Adafruit_NeoPixel模块
#include <Adafruit_NeoPixel.h>

// 设置灯珠数量
#define NUMPIXELS        16

// 设置SPI输出数据引脚
#define PIN_NEOPIXEL    9

// LED引脚设置
#define PIN_LED         18

// 初始化灯珠控制实例
Adafruit_NeoPixel pixels(NUMPIXELS, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);

// 当前灯珠指向
int16_t idx = 0;

//初始化将灯珠的等级保存于数组中
int16_t ArraySave[NUMPIXELS][3] = {0};

// 启动设置
void setup() {
  // 调试串口速率设置
  Serial.begin(115200);
  pinMode(PIN_LED, OUTPUT);

  // 灯珠控制开始
  pixels.begin();

  // 设置亮度为255
  pixels.setBrightness(255);

  // 设置灯珠颜色，全部关闭
  pixels.fill(0x000000);

  delay(100);

  // 设置灯珠颜色
  pixels.fill(0xFF0000);

  delay(100);

  pixels.clear();

  int j = 0;
  for(j=0;j<NUMPIXELS/3;j++){
      pixels.setPixelColor(j,pixels.Color(248-255/(NUMPIXELS/3)*j,255/(NUMPIXELS/3)*j,0));
      ArraySave[j][0]=248-255/(NUMPIXELS/3)*j;
      ArraySave[j][1]=255/(NUMPIXELS/3)*j;
      ArraySave[j][2]=0;
  }
  for(j=0;j<NUMPIXELS/3;j++){
      pixels.setPixelColor(j+8,pixels.Color(0,248-255/(NUMPIXELS/3)*j,255/(NUMPIXELS/3)*j));
      ArraySave[j+NUMPIXELS/3][0]=0;
      ArraySave[j+NUMPIXELS/3][1]=248-255/(NUMPIXELS/3)*j;
      ArraySave[j+NUMPIXELS/3][2]=255/(NUMPIXELS/3)*j;
  }
  for(j=0;j<NUMPIXELS/3;j++){
      pixels.setPixelColor(j+16,pixels.Color(255/(NUMPIXELS/3)*j,0,248-255/(NUMPIXELS/3)*j));
      ArraySave[j+NUMPIXELS/3*2][0]=255/(NUMPIXELS/3)*j;
      ArraySave[j+NUMPIXELS/3*2][1]=0;
      ArraySave[j+NUMPIXELS/3*2][2]=248-255/(NUMPIXELS/3)*j;
  }

}


uint16_t c1 = 0;
uint16_t c2 = 0;
uint16_t c3 = 0;     
uint16_t sign_bit =0;
uint16_t sign = 1;

// 循环主体程序
void loop(){
    uint16_t i = 0,k = 0;
    uint16_t t[3] = {0};
    for(k=0;k<3;k++){
        t[k]=ArraySave[0][k];
    }
    for(i=0;i<NUMPIXELS;i++){
      for(k=0;k<3;k++){
        ArraySave[i][k]=ArraySave[i+1][k];
      }
      pixels.setPixelColor(i,ArraySave[i][0],ArraySave[i][1],ArraySave[i][2]);
    }
    
    for(k=0;k<3;k++){
        ArraySave[NUMPIXELS-1][k]=t[k];  
    }
    pixels.setPixelColor(NUMPIXELS-1,ArraySave[NUMPIXELS-1][0],ArraySave[NUMPIXELS-1][1],ArraySave[NUMPIXELS-1][2]);
    
    delay(50);
    // 显示
    pixels.show();
}