function LedMatrix(){
  var me = this;
  var gr,buf; //graphics object and buffer in graphics object
  var Penable;
  var ctrlPort,dataPort;
  var sfnc,dfnc;
  var ledBuf = new Uint8Array(64 * 32 / 2);//converted graphics.buffer to data for LED
  var ledLines = new Array(16);
  var adrLines = new Array(16);
  me.init = function(R1,R2,B1,B2,G1,G2,A,B,C,D,Latch,Clock,Enable){
    //sfnc = shiftOut.bind(null,[R1,G1,B1,R2,G2,B2],{clk:Clock});
    //dfnc = digitalWrite.bind(null,[Enable,Latch,Latch,D,C,B,A,Enable]);
    ctrlPort = new BytePort([Enable,Latch,Latch,A,B,C,D,Enable],2);
    dfnc = ctrlPort.sendBits.bind(ctrlPort);
    dataPort = new BytePort([R2,G2,B2,R1,G1,B1],1);
    dataPort.setClock(Clock,true);
    sfnc = dataPort.sendBytes.bind(dataPort);
    gr = Graphics.createArrayBuffer(64,32,4);
    buf = gr.buffer;
    return gr;
  };
  me.convertArray = function(){
    var bufpnt1,bufpnt2,ledpnt;
    bufpnt1 = 0; bufpnt2 = 512; ledpnt = 0;
    var pane = false,i,j;
    for(i = 0; i < 16; i++){
      for(j = 0; j < 64;j +=2){
        ledBuf[ledpnt] = (buf[bufpnt2] & 7) + ((buf[bufpnt1] & 7)<<3);
        ledpnt++;
        ledBuf[ledpnt] = ((buf[bufpnt2] & 0xf0) >>4) + ((buf[bufpnt1] & 0xf0)>>1);
        ledpnt++;
        bufpnt1++;
        bufpnt2++;
      }
    }
    for(i = 0; i < 16; i++){
      adrLines[i] = 5|i<<3;
      ledLines[i] = new Uint8Array(ledBuf.buffer,i*64,64);
    }
  };
  me.scan = function(){
    var y = 16;
    while(y--){
      sfnc(ledLines[y]);
      dfnc(adrLines[y]);
    }
  };
}
var gr,led = new LedMatrix();
function test(){
  gr = led.init(D2,D16,D4,D17,D15,D27, D5,D18,D19,D21, D26,D22,D25);
  gr.setBgColor(1);
  gr.clear();
  gr.setColor(2);
  gr.fillRect(5,12,50,25);
  gr.setColor(4);
  gr.fillRect(10,14,40,20);
  gr.fillRect(10,0,40,0);
  led.convertArray();
  var d = new Date();
  led.scan();
  d = new Date() -d;
  console.log(d);
}