read a line of an ArrayBuffer

I've done this...
i'm waiting the postman with the 7x1 display for testing... (monday or later)

  g = Graphics.createArrayBuffer(8,8,1);
  g.setFont4x6();
  g.drawString(texte,compteur,0);
  a = new Uint8Array(g.buffer);
  // ecran 1x7
  Serial1.write([0x80,0x89,Adress],a[0],[0­x8F]);
  // ecran 7x7
  Serial1.write([0x80,0x87,Adress2],a[1],a­[2],a[3],a[4],a[5],a[6],a[7],[0x8F]);