Getting function not found errors when uploading code

Added your code... into context.

SPI1.setup({ sck:B3, mosi:B5 });

var VPIN = A5;
// divider resistor 1 in ohms
var divr1 = 10000;
var divr2 = 1000;


function onInit() {
  var g = require("PCD8544").connect(SPI1,B6,B7,B10, function() {
    function updateVolts() {
      var aread = 0;
      var numReads = 5;
      
      for(var i = 0; i < numReads; i++) {
        aread += analogRead(VPIN);
      }
      aread /= numReads;
      var pinvolts = 3.3 * aread;
      var powervolts = (pinvolts / divr2) * (divr1 + divr2);
      g.clear();
      g.setContrast(0.45);
      g.setFontVector(12);
      g.drawString("ADC: " + aread,0,0);
      g.drawString("Volts: "+ powervolts,0,16);
      g.flip();
    }
    updateVolts();
    setInterval(updateVolts, 500);
  });
  
  // handle backlight
  (function() {
    var backlight = B1;

    var backlightSleep = false;

    setWatch(function(e) {
      // clear any old timeouts so that if we have a misspress the screen will
      // stay on during the subsequent presses
      if (backlightSleep) {
        clearTimeout(backlightSleep);
        backlightSleep = false;
      }

      // if button down
      if (e.state) {
        // turn backlight on
        digitalWrite(backlight, true);
      } else {
        // turn backlight back off after a few seconds
        backlightSleep = setTimeout(function() {
          digitalWrite(backlight, false);
          backlightSleep = false;
        }, 2000);
      }
    }, BTN, { repeat: true });
  })();
}

//onInit();
save();