use a led matrix 5x7 without driver chip?

Hello Markus,

I do not have a pinned pico, i've used a pico board and pin header on breadboard without soldering anything (crap work!!!)

In an earlier version i was ligthting On dot by dot on the first line and it was working.
but it seems to light on the led but i'm not sure the out is a line...
with this one i'm a bit confuse how a graphic buffer and uint8Array work together!
if i drawString("H") in my arrayBuffer, it should look like this

10001  //17 -> #11
10001  //17 -> #11
10001  //17 -> #11
11111  //31 -> #'1F'
10001  //17 -> #11
10001  //17 -> #11
10001  //17 -> #11

but the value from the graphicBuffer are not...
if i add

for (let i=0; i<a.length;i++) {
    console.log(a[i].toString(2));
  }

my "brilliant" test :/

let g = Graphics.createArrayBuffer(5,7,1);
let a = new Uint8Array(g.buffer);

var compteur=0;
var row= [A6,A5,A8,B7,B6]; // my 5 col

function sendData() {
  g.clear();
  g.drawString("H");
  digitalWrite(B4,0); // select first row
  for (let i=0; i<row.length;i++) {
    digitalWrite(row[i],a[i]);
  }
  digitalWrite(B4,1); // leave First row
  compteur++;
}

function onInit() {
  require("Font4x6").add(Graphics);
  pinMode(B4,"opendrain");
  for (let i=0; i<row.length;i++) {
    pinMode(row[i],"output");
  }
  digitalWrite(B4,1);
  setInterval(sendData, 1000);
}

é.

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