Adafruit's 32x32 RGB LED matrix panel

Hi,

I am using this:

digitalWrite([B8,B8,B5,B6,B7],8|(((((col&0x80808000)>>15)*0x4081)>>14)&7));

The data from the file comes as

BB,GG,RR,AA
Blue Green Red Gamma

The issue I am facing is that it works as long as I have as blue >128 other wise something funny happens, I don't really know what, here is the full code and some sample files.

var TONES=1;
console.log(getTime());
 var image = require("fs").readFile("GIF/blue.bmp", "binary");
image = image.substr(54,image.length);
if (image.length==4096){
  var bytes = new Uint8Array(4096);
  for (var j=0;j<4096;j++){ 
    //bytes[j]=Math.round(image[j].charCodeAt()*TONES/256);
    bytes[j]=image[j].charCodeAt();
    //console.log(image[j].charCodeAt());
  }
}
if (image.length==3072){
  var c = 0;
  var bytes = new Uint8Array(4096);
  for (var j=0;j<3072;j++){
    if ((c+1)%4==0){
      bytes[c]=128;
      c+=1;
    } else {
      //bytes[j]=Math.round(image[j].charCodeAt()*TONES/256);
      bytes[c]=image[j].charCodeAt();
      
      //console.log(image[j].charCodeAt());
    }
    c+=1;
  }
}
console.log(getTime());
console.log(process.memory());
image='';
console.log(process.memory());
console.log(bytes);


function rcolor(x){
  return (TONES*x/256);
}

function clock(){
  digitalWrite(B8,1);
  digitalWrite(B8,0);
}

function latch(){
  digitalWrite([B9,B9],1);
}

//function linea(y){
//  return (y-1)*128;
//}
function linea(y){
  if (y==1) {return 0;}
  if (y==2) {return 128;}
  if (y==3) {return 256;}
  if (y==4) {return 384;}
  if (y==5) {return 512;}
  if (y==6) {return 640;}
  if (y==7) {return 768;}
  if (y==8) {return 896;}
  if (y==9) {return 1024;}
  if (y==10) {return 1152;}
  if (y==11) {return 1280;}
  if (y==12) {return 1408;}
  if (y==13) {return 1536;}
  if (y==14) {return 1664;}
  if (y==15) {return 1792;}
  if (y==16) {return 1920;}
  if (y==17) {return 2048;}
  if (y==18) {return 2176;}
  if (y==19) {return 2304;}
  if (y==20) {return 2432;}
  if (y==21) {return 2560;}
  if (y==22) {return 2688;}
  if (y==23) {return 2816;}
  if (y==24) {return 2944;}
  if (y==25) {return 3072;}
  if (y==26) {return 3200;}
  if (y==27) {return 3328;}
  if (y==28) {return 3456;}
  if (y==29) {return 3584;}
  if (y==30) {return 3712;}
  if (y==31) {return 3840;}
  if (y==32) {return 3968;}
}

function toled(){
  var c=0;
  var v=0;
  var abcd = 0;
  for (var f=0;f<TONES;f++){
    for (var i=32;i>24;i--){
      digitalWrite(B13,1);
      abcd=32-i+1;
      y=linea(i);
      z=y+127;
      w=linea(i-8);
      x=w+127;
      /*for (var k=y;k<z+1;k=k+4){
        //if(rcolor(bytes[k])>c){
        if(bytes[k]>c){
          digitalWrite(LED3,1);
        } else {
          digitalWrite(LED3,0);
        }
        //if(rcolor(bytes[k+1])>c){
        if(bytes[k+1]>c){
          digitalWrite(LED2,1);
        } else {
          digitalWrite(LED2,0);
        }
        //if(rcolor(bytes[k+2])>c){
        if(bytes[k+2]>c){
          digitalWrite(LED1,1);
        } else {
          digitalWrite(LED1,0);
        }
        clock();
        w+=4;
        c+=1;
      }*/
    var words = new Uint32Array(bytes.buffer,y,(z-y)/4);
      //console.log(words);
      [].forEach.call(words,function(col){
        digitalWrite([B8,B8,B5,B6,B7],8|(((((col&0x80808000)>>15)*0x4081)>>14)&7));
        console.log(col.toString(16),' - ',(col&0x80808000).toString(16));
      });
    latch();

    }
    c=0;
    for (var i=16;i>8;i--){
      digitalWrite(B13,1);
      abcd=32-i+1;
      y=linea(i);
      z=y+127;
      w=linea(i-8);
      x=w+127;
      /*for (var k=y;k<z+1;k=k+4){
        //if(rcolor(bytes[k])>c){
        if(bytes[k]>c){
          digitalWrite(B5,1);
        } else {
          digitalWrite(B5,0);
        }
        //if(rcolor(bytes[k+1])>c){
        if(bytes[k+1]>c){
          digitalWrite(B6,1);
        } else {
          digitalWrite(B6,0);
        }
        //if(rcolor(bytes[k+2])>c){
        if(bytes[k+2]>c){
          digitalWrite(B7,1);
        } else {
          digitalWrite(B7,0);
        }
        clock();
        w+=4;
        c+=1;
      }*/
    var words = new Uint32Array(bytes.buffer,y,(z-y)/4);
      //console.log(words);
      [].forEach.call(words,function(col){
        digitalWrite([B8,B8,LED3,LED2,LED1],8|(((((col&0x80808000)>>15)*0x4081)>>14)&7));
      console.log(col.toString(16),' - ',(col&0x80808000).toString(16));
      });
    latch();

    }
  }
}



function onInit(){
  while (digitalRead(BTN1) == 0){
  var t =getTime();
  toled();
  console.log(' sale ', t - getTime());
  }
  console.log(process.memory());
}

4 Attachments

• blue.bmp
• green.bmp
• red.bmp
• white.bmp