基于ATOM的简易POV显示

vany5921

1.器材选用
使用 LiPo 电池驱动 M5ATOM 矩阵，并在电机上转动。电机使用 PWM 控制器调整转速。





2.显示图像
M5ATOM 矩阵的 5 个 LED 以 RGBY 的四种颜色按顺序发射，在电机转速调整期间旋转，并确认可在1圈显示48个像素。



3.在 Excel 中生成图像数据
我们尝试了一种技术，在 Excel 中绘制点画，然后转换极坐标以生成数据。半径分为六个部分。 由于 M5ATOM Matrix LED 使用 5 个 LED，因此不使用第一个数据（中间像素）。

在 Excel 中转换方法如下：A为中心坐标

生成下图像文件
[mw_shl_code=c,true]#define Frame 1
#define NUMPIXELS 6
#define Div 48

const uint32_t pic [Frame][Div][NUMPIXELS] = {
  {
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000, 0xffff00},
    {0x000000, 0xF7B95C, 0x000DEB, 0xff0000, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0xff0000, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xff0000, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xff0000, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0xF7B95C, 0x000DEB, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000DEB, 0x000000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000000, 0x000000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000000, 0x000000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000DEB},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xF7B95C, 0x000DEB},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xF7B95C, 0x000DEB},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0x000DEB, 0xF7B95C, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000DEB, 0x000000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000DEB, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0xF7B95C, 0xF7B95C, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0xF7B95C, 0xF7B95C, 0xff0000},
    {0x000000, 0xF7B95C, 0xF7B95C, 0xF7B95C, 0x000000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0xF7B95C, 0xF7B95C, 0x000000},
    {0x000000, 0xF7B95C, 0x000DEB, 0xF7B95C, 0xF7B95C, 0x000000},
    {0x000000, 0x000DEB, 0x000DEB, 0xF7B95C, 0xF7B95C, 0x000000},
    {0x000000, 0x000DEB, 0x000DEB, 0xF7B95C, 0xF7B95C, 0xF7B95C},
    {0x000000, 0x000DEB, 0x000DEB, 0x000DEB, 0xF7B95C, 0xF7B95C},
    {0x000000, 0x000DEB, 0x000DEB, 0x000DEB, 0x000DEB, 0x000000},
    {0x000000, 0x000DEB, 0x000DEB, 0x000DEB, 0x000000, 0x000000},
    {0x000000, 0x000DEB, 0xF7B95C, 0xF7B95C, 0x000000, 0x000000},
    {0x000000, 0x000DEB, 0xF7B95C, 0xF7B95C, 0x000000, 0x000000},
    {0x000000, 0x000DEB, 0xF7B95C, 0x000000, 0x000000, 0x000DEB},
    {0x000000, 0xF7B95C, 0xF7B95C, 0x000000, 0x000000, 0x000DEB},
    {0x000000, 0xF7B95C, 0xF7B95C, 0x000000, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000000, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0x000DEB, 0x000DEB},
    {0x000000, 0xF7B95C, 0x000DEB, 0xff0000, 0xff0000, 0xff0000},
    {0x000000, 0xF7B95C, 0x000DEB, 0xff0000, 0xff0000, 0xffff00},
    {0x000000, 0xF7B95C, 0x000DEB, 0x000DEB, 0xff0000, 0xffff00},
  },
};[/mw_shl_code]
根据生成的图像点亮LED
[mw_shl_code=arduino,true]#include "FastLED.h"
#include "graphics.h"

#define NUM_LEDS 5
#define DATA_PIN 27
#define Bright 30

int FrameNum = 0,Num = 0;

CRGB leds[NUM_LEDS];

int rotDivNum = 0;

void setup(){
  FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(Bright);
}

void loop(){
  for(int i=1; i<NUMPIXELS; i++) {
    leds[i-1] = pic[Num][rotDivNum];
  }
  FastLED.show();
  
  rotDivNum++;
  if(rotDivNum >= Div){
    rotDivNum = 0;
    FrameNum++;
    if(FrameNum >= 4){
      FrameNum = 0;
      Num++;
      if(Num >= Frame) Num = 0;
    }
  }
}[/mw_shl_code]