P3 RGB pixel panel

I would like to do some testing on this.
@Gordon, could you please take a look to attached code before I start testing ?
Usually 4 eyes see more than 2

Pins are the same as used in an working ESP32-only solution. This part should be correct.

I've some questions:

• what is repeat in shiftOut.bind ?
  
• why do you have enable pin twice in digitalWrite ?
  
• we only have 4 address bytes, how would we control 32 rows ? Seems to be a non Espruino
  questions, but may be you have some ideas
  

• should we init enable to 1 ?

  function LedMatrix(){
  var me = this;
  var gr,buf; //graphics object and buffer in graphics object
  var sfnc,dfnc; //function calls to send data to LED Matrix
  var Pr1,Pr2,Pb1,Pb2,Pg1,Pg2; //Color Pins
  var Pa,Pb,Pc,Pd; //address pins
  var Platch,Pclock,Penable; //control pins
  me.init = function(R1,R2,B1,B2,G1,G2,A,B,C,D,Latch,Clock,Enable){
  Pr1 = R1; Pr2 = R2; Pb1 = B1; Pb2 = B2; Pg1 = G1; Pg2 = G2;
  Pa = A; Pb = B; Pc = C; Pd = D;
  Platch = Latch; Pclock = Clock; Penable = Enable;
  gr = Graphics.createArrayBuffer(64,32,8);
  buf = gr.buffer;
  return gr;
  };
  sfnc = shiftOut.bind(null,[Pr1,Pr2,Pb1,Pb2,Pg1,Pg2],{clk:Pclock,repeat : 8});
  dfnc = digitalWrite.bind(null,[Penable,Platch,Pd,Pc,Pb,Pa,Penable]);
  me.scan = function(){
  enable.reset();
  for (var y=0;y<16;y++) {
    sfnc(new Uint8Array(u,y*64,64));
    dfnc(33|y<<1);
  }
  enable.set();
  };
  }
  var led = new LedMatrix();
  function test(){
  var ledGraphik = led.init(2,16,4,17,15,27,5,18,19,21,26,22,25);
  ledGraphik.setBgColor(0);
  ledGraphik.clear();
  ledGraphik.SetColor(17);
  ledGraphik.clear();
  ledGraphik.fillRect(0,0,3,3);
  led.scan();
  }