AVR Studio and assembly language.

You'll need to download AVR Studio 4.19 for further work on AVR assembly language.

RS232 protocol

The RS232 protocol has been around for many years now. There are various versions and we have to be aware that non-standard applications are used often. The main aspects are the sockets and plugs and the packet sending rules.

Think about the wearable project

The next project is about using an embedded system very close to a person. It could be on clothes, shoes or on something you carry or on an accessory like a coat, hat or belt. Some ideas below are given in links.

Links


http://atmelcorporation.wordpress.com/2014/01/23/wearables-to-create-personal-data-streams/?utm_campaign=January_2014_Newsletter.html&utm_medium=email&utm_source=Eloqua

Some Instructable wearable projects.

http://www.instructables.com/id/Despicable-Me-Minion-Costume-1/

http://learn.adafruit.com/light-activated-pixel-heart

New Zealand has a a strong wearable art movement.

http://www.nst.com.my/life-times/tech/top-picks-ground-breaking-wearable-gadgets-1.528292

http://realbusiness.co.uk/article/26128-7-of-the-best-tech-gadgets-from-londons-wearable-technology-show

http://www.pcadvisor.co.uk/news/google-android/3507296/android-wear-release-date-smartwatches/?cmpid=HTML-DN190314&olo=daily%20news

http://sensoree.com/

LDR, our first sensor

Some good code and information here.
Light dependent resistor circuit. See http://www.ladyada.net/learn/sensors/cds.html

Some voltage division images

We often want a sensor to send its signal using a changing voltage. For instance when the temperature is high we get a big voltage, and when the temperature is low we get a low voltage. Note that normally the input to an Arduino analog pin has to be between 0 and 5 volts.

Futurlec is a good site for buying Atmel ICs

Voltage division

Many sensors we use with the Arduino allow us to sense a changing signal, like light or heat, in terms of a changing voltage. We need to work out the approximate analog input value.

You have to identify all the parts of our Arduino

The Sparkfun Arduino Uno smd

Can you identify all the parts.

Mega 328 Pinout vrs Arduino Pinout

Using the serial monitor

Simple program that uses the serial monitor:

void setup() { 
 //Initialize serial and wait for port to open:
  Serial.begin(19200); 
}
void loop() {
  Serial.println("Hello world");
}  

Lots of ideas on Fritzing site

Look at the projects page of the Fritzing site.

Push that button

Check out this site: http://www.arduino.cc/en/Tutorial/Button

Then do the tasks associated with push buttons.

Arduino Analog Inputs

Most sensors are detected via a changing voltage that's fed into the analog inputs using voltage division.

 There are some good introductions to analog voltage on the Arduino including this one.

And here's the Arduino tutorial about the analog pins.

Running two LEDs

/*

Blink2

Turns on a LED on for half a second, then off for half a second, repeatedly. It also does the same to an off-board LED connected to pin 12 so that when one LED is on the other is off.

The circuit:

* LED connected from digital pin 13 to ground via resistor.

* second LED connected from digital pin 12 to ground via resistor. I used 330 ohms.

* Note: On most Arduino boards, there is already an LED on the board

connected to pin 13.

Created 1 June 2005

By David Cuartielles. Adapted by Peter Brook

based on an orginal by H. Barragan for the Wiring i/o board

*/

int ledPin = 13; // LED connected to digital pin 13

int redLedPin = 12; // LED connected to digital pin 13

int del =500;

// The setup() method runs once, when the sketch starts

void setup() {

// initialize the digital pin as an output:

pinMode(ledPin, OUTPUT);

pinMode(redLedPin, OUTPUT);

}

// the loop() method runs over and over again,

// as long as the Arduino has power

void loop()

{

digitalWrite(ledPin, HIGH); // set the LED on

digitalWrite(redLedPin, LOW); // set the LED on

delay(del); // wait

digitalWrite(ledPin, LOW); // set the LED off

digitalWrite(redLedPin, HIGH); // set the LED on

delay(del); // wait

}