APA102 individually addressable LEDs

You are reading a single comment by @DrAzzy and its replies. Click here to read the full conversation.
•
DrAzzy




SPI1.setup({sck:14,mosi:13,mode:1,order:"msb",baud:4000000});
I2C1.setup({scl:5,sda:4});

var http = require("http");
var eeprom=require("AT24").connect(I2C1, 32, 32);

setBusyIndicator(2);
require("ESP8266").logDebug(0);
require("ESP8266").setLog(0);


// Parameters:
numleds=10;

//global functions
function animate() {
  setTimeout("animate()",20);
  var x;
  if (leds.animode) {x=getTime();}
  leds.flip();
  leds.dotwinkle();
  if (leds.animode) {console.log(getTime()-x);}
}


// Network

function onPageRequest(req, res) {
  var a = url.parse(req.url, true);
  if (a.pathname.split(".")[1]=="cmd"){
  	if (handleCmd(a.pathname,a.query,res)) {
  		res.writeHead(200,{'Access-Control-Allow-Origin':'*'});
  	} 
  	res.end();
  } else {
	res.writeHead(404);
	res.end("NOT FOUND");	
  }
}
require("http").createServer(onPageRequest).listen(80);

function handleCmd(pn,q,r) {
	try {
  if (pn=="/save.cmd") {
    //lreq=a.query;
    if (q.index==undefined || q.index>memmap.statMax || q.index < 0) {
    	r.write("MAX INDEX:");
    	r.write(memmap.statMax);
    	return 0;
    }
    leds.save(q.index);
    return 1;
  } if (pn=="/load.cmd") {
    if (q.index==undefined || q.index>memmap.statMax || q.index < 0) {
    	r.write("MAX INDEX:");
    	r.write(memmap.statMax);
    	return 0;
    }
    if (!leds.load(q.index)){
    	r.writeHead(404);
    	r.write("No such pattern");
    	return 0;
    }
    r.write("OK");
    return 1;
  }if (pn=="/showState.cmd") {
    //lreq=a.query;
    r.write(JSON.stringify({"base":leds.tbuf,"twinkle":[leds.tm,leds.ti,leds.ta]}));
    return 1;
  }if (pn=="/setAll.cmd") {
    //lreq=a.query;
    leds.setAll(eval(q.color),eval(q.mode),eval(q.max),eval(q.min));
    r.write("OK");
    return 1;
  }else if (pn=="/setPixel.cmd") {
    leds.setPixel2(q.led,0,eval(q.color),eval(q.mode),eval(q.max),eval(q.min));
    r.write("OK");
    return 1;
  } else {
  	r.writeHead(404);
	r.write("NO CMD");
  	return 0;
  }
	} 
	catch (err) {
		r.writeHead(500);
		r.write("ERROR");
		return 0;
	}
}


var memmap={
	slen:32,
	rlen:40,
	statOff:0x100,
	statMax:14,
	sEep:eeprom,
	oEep:eeprom,
	oOff:0x800,
	oMax:64,
	oIEE:eeprom,
	oIOF:0
};


// LEDS
gtab=new Uint16Array(256);
gtab=new Uint16Array([0,1,2,3,4,5,6,7,8,9,11,13,15,17,19,21,23,25,27,30,33,36,39,42,45,48,51,54,58,62,66,70,74,78,82,86,91,96,101,106,111,116,121,126,132,138,144,150,156,162,168,174,181,188,195,202,209,216,223,230,238,246,254,262,270,278,286,294,303,312,321,330,339,348,357,366,376,386,396,406,416,426,436,446,457,468,479,490,501,512,523,534,546,558,570,582,594,606,618,630,643,656,669,682,695,708,721,734,748,762,776,790,804,818,832,846,861,876,891,906,921,936,951,966,982,998,1014,1030,1046,1062,1078,1094,1111,1128,1145,1162,1179,1196,1213,1230,1248,1266,1284,1302,1320,1338,1356,1374,1393,1412,1431,1450,1469,1488,1507,1526,1546,1566,1586,1606,1626,1646,1666,1686,1707,1728,1749,1770,1791,1812,1833,1854,1876,1898,1920,1942,1964,1986,2008,2030,2053,2076,2099,2122,2145,2168,2191,2214,2238,2262,2286,2310,2334,2358,2382,2406,2431,2456,2481,2506,2531,2556,2581,2606,2631,2657,2683,2709,2735,2761,2787,2813,2839,2866,2893,2920,2947,2974,3001,3028,3055,3083,3111,3139,3167,3195,3223,3251,3279,3308,3337,3366,3395,3424,3453,3482,3511,3541,3571,3601,3631,3661,3691,3721,3751,3782,3813,3844,3875,3906,3937,3968,3999,4031,4063,4095]);
var leds = {};
leds.map=memmap;
leds.spi=SPI1;
leds.num=numleds;
leds.afr=0;
leds.fbuf=new Uint8Array(numleds*4);
leds.buff=new Uint8Array(numleds*3);
leds.tbuf=new Uint8ClampedArray(numleds*3);
leds.t=new Int8Array(numleds*3);
leds.tm=new Uint8Array(numleds*3);
leds.ti=new Int8Array(numleds*3);
leds.ta=new Int8Array(numleds*3);
leds.overlay=new Uint8Array(numleds*3);
leds.tclb=new Uint8ClampedArray(numleds*3);
for (var tem=0;tem<numleds;tem++){
	for (var j=0;j<3;j++){
		leds.ti[tem*3+j]=-10;
		leds.ta[tem*3+j]=10;
	}
}
leds.ison=1;
leds.animode=0;
leds.aniframe=0;
leds.anilast=0;
leds.aniaddr=0;
leds.zz="\x00\x00";

leds.dotwinkle = function () {
	var t=this.t;
	var tm= this.tm;
	var ta=this.ta;
	var ti=this.ti;
	var b=this.buff;
	var z=this.tbuf;
	var o=this.overlay;
	if (this.animode) {
		if (this.aniframe > this.anilast) {
			this.animode=0;
			this.anilast=0;
			this.aniframe=0;
			leds.aniaddr=0;
			this.overlay.fill(0);
		} else {
			this.overlay=this.map.oEep.read(this.aniaddr+this.map.slen*this.aniframe++,this.num*3);
		}
	}
	if (this.animode & 4 ){
		leds.tclb.set(o);
    } else if (this.animode & 2){
        for (var i=0;i<30;i++){
          leds.tclb[i]=b[i]+t[i]+o[i];
        }
	} else {
		for (var i=0;i<30;i++){
			var mode=tm[i];
			var mo=mode&0x0F;
			var pr=mode>>4;
			if (!(this.animode&2)) {
				if (mo==1) { //0x01 - high nybble is chance to change, from 0 (1/16) to 15 (16/16 chance to change)
					var n=Math.random(); //3ms
					var th=(pr+1)/32;
	      				if (n<0.5+th){ //8ms
	      					if(n<=(0.5-th) && t[i]>ti[i]){t[i]--;}
		      			} else {
	      					if (t[i]<ta[i]){t[i]++;}
	      				}
				} else if (mo==2) { //fade/pulse. 
	          			if (this.afr%((1+pr)&7)==0){
	            				t[i]+=(pr&8?1:-1);
						if (t[i] == ti[i] || t[i] == ta[i]) {
							tm[i]=mode^128;
						}
	        			}
				} else {
					if (t[i]!==0){if(t[i]>0){t[i]--;} else {t[i]++;}}
				}
			}
			var c=b[i];
			if (mo || this.afr%((1+pr)&7)==0) {
				b[i]+=E.clip(z[i]-c,-1,1);
			}
			leds.tclb[i]=c+(c?t[i]:0)+o[i]; //10ms
		}
	}
	this.afr=this.afr==255?0:this.afr+1;
};

leds.setAll= function (color,tmode,tmax,tmin,instant) {
	for (var i=0;i<this.num;i++) {
		for (j=0;j<3;j++){
			//this.t[3*i+j]=0;
			this.tbuf[3*i+j]=color[j];
            if (instant) {this.buff[3*i+j]=color[j];}
			if (tmode) {
				this.tm[3*i+j]=tmode[j];
				this.ti[3*i+j]=tmin[j];
				this.ta[3*i+j]=tmax[j];
			}
		}
	}
};

leds.load = function (index) {
	var s=this.map.slen;
	var addr=this.map.statOff+(4*index*s);
	if (this.map.sEep.read(addr+s-1,1)[0]==255) {
		return 0;
	}
	this.tbuf=this.map.sEep.read(addr,this.num*3);
	this.tm=this.map.sEep.read((addr+s),this.num*3);
	this.ti=new Int8Array(this.map.sEep.read((addr+s*2),this.num*3));
	this.ta=new Int8Array(this.map.sEep.read((addr+s*3),this.num*3));
	return 1;
};

leds.del = function (index) {
	var t=new Uint8Array(this.map.slen*4);
	t.fill("\xFF");
	this.map.sEep.write(this.map.statOff+(4*index*this.map.slen),t);
};
leds.setAnimate = function (mode,address,frames){
  leds.anilast=frames;
  leds.aniaddr=address;
  leds.animode=mode;
};

leds.save = function (index) {
	var s=this.map.slen;
	var addr=this.map.statOff+(4*index*s);
	this.map.sEep.write(addr,E.toString(this.tbuf)+leds.zz+E.toString(this.tm)+leds.zz+E.toString(this.ti)+leds.zz+E.toString(this.ta)+leds.zz);
};


leds.setPixel = function (x, y, color) {
	this.tbuf[x*3]=color[0];
	this.tbuf[x*3+1]=color[1];
	this.tbuf[x*3+2]=color[2];
};

leds.adjPixel=function (led,color) {
	this.tbuf[led*3]+=color[0];
	this.tbuf[led*3+1]+=color[1];
	this.tbuf[led*3+2]+=color[2];
};

leds.adjAll=function (color) {
	for (var i=0;i<this.num;i++){
		this.adjPixel(i,color);
	}
};

leds.setPixel2 = function (x, y, color,mode,mintwi,maxtwi,instant) {
	x*=3;
	for (var i=0;i<3;i++){
		this.tbuf[x+i]=color[i];
      if (instant) {this.buff[x+i]=color[i];}
		this.tbuf[x+i]=color[i];
		this.tm[x+i]=mode[i];
		this.ta[x+i]=maxtwi[i];
		this.ti[x+i]=mintwi[i];
	}
};

leds.flip = function () {
	var j=0;
	var i=0;
	var z=leds.num*3;
	while (i<z) {
      var rch=gtab[leds.tclb[i++]];
		var gch=gtab[leds.tclb[i++]];
		var bch=gtab[leds.tclb[i++]];
		
		var ma = Math.max(rch,gch,bch);
		var mult=1;
        var gdim=31;
		
			if (ma <390) {
				gdim=3;
				mult=10.33;
			} else if (ma <700) {
				gdim=7;
				mult=4.4;
			} else if (ma <1700) {
				gdim=15;
				mult=2.06;
			} 
		
		this.fbuf[j++]=(this.ison?(gdim|224):224);
		this.fbuf[j++]=(bch?Math.max((bch*mult)>>4,1):0);
		this.fbuf[j++]=(gch?Math.max((gch*mult)>>4,1):0);
		this.fbuf[j++]=(rch?Math.max((rch*mult)>>4,1):0);

	}

	this.spi.write(0,0,0,0,this.fbuf,0xFF,0xFF,0xFF,0xFF);
};

leds.zflip = function () {
	var ca=startAddr+(frameLength*curFrame++);
	this.fbuf=eep.read(ca,frameLength);
	this.spi.write(0,0,0,0,this.fbuf,0xFF,0xFF,0xFF,0xFF);
};


setBusyIndicator(2);
Alternate modes for animations - this lets me get ~30 fps with animode =5 (where the background is totally replaced) or 18fps with animode=3 (where the background and current twinkle state is used, but all other calculations are stopped. I just wish I could do the twinkle calculations faster.
APA102 individually addressable LEDs

About

Espruino
