Cascading Max7219

SPI2.setup({
  mosi: B15,
  sck: B13
});
var disp = require("MAX7219").connect(SPI2, B14, 16);

/** 呼吸灯效 */
function breath() {
  var light = 0.01;
  var increase = true;

  setInterval(function () {
    if (increase) {
      light += 0.01;
    } else {
      light -= 0.01;
    }

    if (light > 0.99) {
      increase = false;
    } else if (light < 0.01) {
      increase = true;
    }
    disp.intensity(light); // 亮度
  }, 30);
}

function onInit() {
  var data = [
  0, 0, 0, 0, 96, 2, 36, 0,
  0, 0, 0, 0, 72, 2, 200, 33,
  0, 14, 0, 0, 32, 2, 36, 8,
  128, 0, 0, 0, 160, 1, 72, 41, 224, 15, 0, 0, 32, 2, 70, 16, 0, 28, 0, 30, 144, 7, 72, 40, 96, 2, 0, 0, 16, 2, 128, 63, 248, 49, 248, 48, 96, 121, 40, 46, 64, 2, 192, 0, 8, 2, 0, 30, 12, 0, 8, 34, 16, 49, 8, 32, 64, 50, 128, 49, 4, 2, 0, 0, 228, 3, 200, 33, 132, 1, 248, 63, 192, 63, 0, 33, 0, 2, 0, 0, 192, 4, 8, 38, 192, 1, 0, 0, 126, 2, 4, 0, 0, 0, 0, 0, 96, 4, 232, 33, 128, 0, 0, 0 ];
  disp.raw(new Uint8Array(data).buffer);

  breath();
}

onInit();