motorStatistics.js

var time = 2000; 
var cpr = [64, 64, 64, 64];

var countTicks = function(motorPort, encoderPort, time) {
	var motor = brick.motor(motorPort);
	var encoder = brick.encoder(encoderPort);

	var encBegin = encoder.readRawData();
	motor.setPower(100);
	script.wait(time);
	var encEnd = encoder.readRawData();
	motor.setPower(0);
	return Math.abs(encEnd - encBegin);
};

var round = function(number, accur) {
	return Math.round(number * accur) / accur;
};

var pixelPerString = 30;

var main = function() {
	var display = brick.display();

	display.addLabel("Rotation time: " + time, 10, pixelPerString * 1);
	print("Rotation time: " + time);
	display.addLabel("Motor / CPR / Revs", 10, pixelPerString * 2);
	print("Motor / CPR / Revs");
	
	for (var i = 1; i <= 4; i++) {
		var ticks = countTicks("M" + i, "E" + i, time);
		var revs = round(ticks / cpr[i - 1], 10);

		var infoString = "M" + i + " / " + cpr[i - 1] + " / " + revs;
		display.addLabel(infoString, 10, pixelPerString * (i + 2));
		display.redraw();
		print(infoString);
	}

	script.wait(60000);
}