基于ATOM的简易POV显示
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
#define Frame 1
#define NUMPIXELS 6
#define Div 48
const uint32_t pic = {
{
{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},
},
};
根据生成的图像点亮LED
#include "FastLED.h"
#include "graphics.h"
#define NUM_LEDS 5
#define DATA_PIN 27
#define Bright 30
int FrameNum = 0,Num = 0;
CRGB 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 = pic;
}
FastLED.show();
rotDivNum++;
if(rotDivNum >= Div){
rotDivNum = 0;
FrameNum++;
if(FrameNum >= 4){
FrameNum = 0;
Num++;
if(Num >= Frame) Num = 0;
}
}
}
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