ARDUINO TIMER INTERRUPT SKETCH HOW TO
ARDUINO TIMER INTERRUPT SKETCH SERIAL
ARDUINO TIMER INTERRUPT SKETCH MANUAL
ARDUINO TIMER INTERRUPT SKETCH SOFTWARE

Next, Write a new version of your IntervalTimer sketch from Section A called tricolorTimer, and modify it to blink each color for one second in succession: Red, Green, Blue.

Resistors are in the rightmost black cabinet on the back wall of the lab, next to the door of 003D. It is okay to substitute the resistors for nearby values if the exact ones are not available, but err on the side of less current through the LED instead of more. Ask if you have a problem.Īfter testing, connect the LED Common Anode to the Teensy corner pin marked Vin (3.7 to 5.5 volts), the red segment to pin 20 via a 560Ω current-limiting resistor, the green segment to pin 21 via a 330Ω current-limiting resistor, and the blue LED to pin 22 via a 300Ω current-limiting resistor.

You should test your LED before connecting it to the Teensy board by briefly grounding the current-limiting resistors to ground, which should light the LED.

In addition, be very careful when wiring that you do not creat any short-circuits between any of the power pins and ground. Failure to do so will result in damage to the LED. WARNING: You must use a current-limiting resostor in series with the cathodes of the LED. The purpose of the bypass capacitors? Why might they be useful for this lab?

ARDUINO TIMER INTERRUPT SKETCH MANUAL

Go through the entire Oscilloscope Tutorial (consult the Oscilloscope Manual as needed).īypass capacitors, which are used to reduce noise in your circuit.

Save your working sketch for future reference and use. Question 4: What is the purpose of the following functions: Question 3: What section of the code is interrupted by the timer interrupt? Question 2: What function executes when the timer interrupt occurs? Question 1: What starts the timer running? Study the working code, paying attention to the comments, and then answer the following questions.

ARDUINO TIMER INTERRUPT SKETCH SERIAL

Here is a reference for IntervalTimer, and sample code for it's use.Ĭopy the sample code into a new Arduino Sketch, calling it MyIntervalTimer.Ĭompile and run the code, and open the Arduino serial debug window. IntervalTimer uses interrupts to call a function at a precise timing interval. Suggested Steps Section A: the IntervalTimer Pulse Width Modulation Arduino reference.Pulse Width Modulation Teensy reference.Pulse Width Modulation general background.RGB LED Datasheet (note that we are using common anode LEDs.) NOTE: pinouts are wrong.Use the processor pins that we suggest for your wiring, so that you will be able to add other parts to your board later without having to re-wire anything.Use your oscilloscope to help debug hardware as you build it.Test things as you work on them and verify that each part works as you add it.You're going to be working with programs that require careful timing and have limited resources available to debug. Practice incremental design and debugging strategies.

Instead, check if that malloc will work (It won't).

ARDUINO TIMER INTERRUPT SKETCH SOFTWARE

Don't guess and don't assume that software resources are available.

Read the data sheets and refer to the Teensy and Arduino references.

Often, the next part of the lab reveals why something is important.

As usual, read all of the directions before proceeding.

The deliverables section below outlines exactly what should be turned in. This lab assignment has 4 required sections.

ARDUINO TIMER INTERRUPT SKETCH HOW TO

how to change the brightness of an LED with PWM Īnd potentiometer to change the fade rate.

Interrupt for Pulse Width Modulation output MK20DX256 while introducing how to program the microcontroller using a timer interrupt. The goal of this lab is to introduce various features and modules of the CSE466 Lab 2: Timer Interrupts and Pulse-Width-Modulaton Objectives

Arduino timer interrupt sketch