ArduinoのNeoPixelライブラリのサンプルは参考になりますが、盛りだくさん過ぎて分かりにくい印象があります。
シンプルでカラフルに書いてみました。
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#include <Adafruit_NeoPixel.h> #define PIN 2 #define NUMPIXELS 14 Adafruit_NeoPixel led = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); void setup() { Serial.begin(9600); Serial.println("colorSweepTwisted"); led.begin(); led.show(); } void loop() { for(int hue=0;hue<360;hue++){ for(int j=0;j<NUMPIXELS;j++){ float tw=360.0/NUMPIXELS*j; led.setPixelColor(j, hsv2rgb(hue+tw, 1.0, 0.2)); } led.show(); delay(5); } } int within(int p,int R){ int res=p%R; if(res<0){ res=res+R; } return res; } //Based on https://github.com/ratkins/RGBConverter/blob/master/RGBConverter.cpp //h(0-360),s(0.0-1.0),v(0.0-1.0) uint32_t hsv2rgb(float h, float s, float v) { float r, g, b; h=within(h,360); h=h/360; int i = int(h * 6); float f = h * 6 - i; float p = v * (1 - s); float q = v * (1 - f * s); float t = v * (1 - (1 - f) * s); switch(i % 6){ case 0: r = v, g = t, b = p; break; case 1: r = q, g = v, b = p; break; case 2: r = p, g = v, b = t; break; case 3: r = p, g = q, b = v; break; case 4: r = t, g = p, b = v; break; case 5: r = v, g = p, b = q; break; } r=int(r*255),g=int(g*255),b=int(b*255); return led.Color(r, g, b); } |
ついでに、「グルグル巻けば円筒ディスプレイ」用のDemoプログラムも紹介します。10mmピッチのLEDを200個φ60mm(よりも少し太い)のボトルに巻きつけました。一周21個で縦に9個の(狙いは20個✖️10個でしたが、)円筒ディスプレイです。
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#include <Adafruit_NeoPixel.h> #define PIN 2 #define NUMPIXELS 200 #define WNUM 21 #define HNUM 9 Adafruit_NeoPixel led = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); void setup() { Serial.begin(9600); Serial.println("ColorCylinder"); led.begin(); led.show(); // Initialize all pixels to 'off' } void loop() { test1to100(hsv2rgb(45, 1, 0.1)); movingPoints(150); for(int i=0;i<6;i++){ testH_line(hsv2rgb(15+i*60, 1, 0.1)); } for(int i=0;i<6;i++){ testV_line(hsv2rgb(30+i*60, 1, 0.1)); } testColor(); for(int i=0;i<3;i++){ SevenColorRings(); } } //function void test1to100(uint32_t c){ for(int i; i<NUMPIXELS;i++){ baseColor(led.Color(0, 5, 0)); for(int j=0;j<10;j++){ led.setPixelColor(i+j, hsv2rgb(180, 1, 0.1)); } led.setPixelColor(i, hsv2rgb(180, 1, 0.1)); led.show(); delay(10); } } void movingPoints(int rpt){ int x=0; int y=0; int pNUM=8; int xt,yt,p,points[pNUM][2]; for(int i=0;i<rpt;i++){ boolean TRY=true; int count=0; while(TRY && count<10){ xt=x; yt=y; int r=random(0,4); switch(r){ case 0:xt=xt-1;break; case 1:xt=xt+1;break; case 2:yt=yt-1;break; case 3:yt=yt+1;break; default:break; } xt=within(xt,WNUM); yt=within(yt,HNUM); int s=0; TRY=false; while(s<pNUM){ if(points[s][0]==xt && points[s][1]==yt){ TRY=true; s=pNUM; } s++; } count++; } x=xt; y=yt; p=i%pNUM; points[p][0]=x; points[p][1]=y; baseColor(led.Color(0, 5, 0)); for(int j=0;j<pNUM;j++){ led.setPixelColor(points[j][1]*WNUM+points[j][0], led.Color(5, 0, 0)); led.setPixelColor(points[j][1]*WNUM+within((points[j][0]+10),WNUM), led.Color(0, 0, 5)); } led.show(); delay(50); } } void testH_line(uint32_t c){ for(int i=0;i<HNUM;i++){ baseColor(led.Color(0, 5, 0)); for(int j=0;j<WNUM;j++){ led.setPixelColor(j+(i*WNUM), c); } led.show(); delay(50); } } void testV_line(uint32_t c){ for(int i=0;i<WNUM;i++){ baseColor(led.Color(0, 5, 0)); for(int j=0;j<HNUM;j++){ led.setPixelColor(i+(j*WNUM), c); } led.show(); delay(25); } } void testColor(){ for(int i=0;i<360;i++){ baseColor(hsv2rgb(i,1,0.05)); led.show(); delay(20); } } void SevenColorRings(){ //uint32_t SvnC[]={Wheel(0,0.1),Wheel(60,0.1),Wheel(120,0.1),Wheel(180,0.1),Wheel(240,0.1),Wheel(300,0.1)}; uint32_t SvnC[]={hsv2rgb(0,1,0.1),hsv2rgb(60,1,0.1),hsv2rgb(120,1,0.1),hsv2rgb(180,1,0.1),hsv2rgb(240,1,0.1),hsv2rgb(300,1,0.1),hsv2rgb(300,0,0.1)}; for(int i=0;i<7;i++){ for(int j=0;j<HNUM;j++){ setColorRing(j, SvnC[(i+j)%7]); } led.show(); delay(200); } } void setColorRing(int hpos, uint32_t c){ hpos=within(hpos,HNUM); for(int i=0;i<WNUM;i++){ led.setPixelColor(i+(hpos*WNUM), c); } } int within(int p,int R){ int res=p%R; if(res<0){ res=res+R; } return res; } void baseColor(uint32_t c){ for(int i=0;i<NUMPIXELS;i++){ led.setPixelColor(i,c); } } //Based on https://github.com/ratkins/RGBConverter/blob/master/RGBConverter.cpp //h(0-360),s(0.0-1.0),v(0.0-1.0) uint32_t hsv2rgb(float h, float s, float v) { float r, g, b; h=within(h,360); h=h/360; int i = int(h * 6); float f = h * 6 - i; float p = v * (1 - s); float q = v * (1 - f * s); float t = v * (1 - (1 - f) * s); switch(i % 6){ case 0: r = v, g = t, b = p; break; case 1: r = q, g = v, b = p; break; case 2: r = p, g = v, b = t; break; case 3: r = p, g = q, b = v; break; case 4: r = t, g = p, b = v; break; case 5: r = v, g = p, b = q; break; } r=int(r*255),g=int(g*255),b=int(b*255); return led.Color(r, g, b); } |