comenzando con MATLAB y Simulink para Arduino

Table of Contents
Preface
1. Preparing Development Environment
1.1 Arduino
1.1.1 Arduino Uno
1.1.2 Arduino Leonardo
1.1.3 Arduino Mega 2560
1.1.4 Arduino Due
1.2 Electronic Components
1.2.1 Arduino Starter Kit
1.2.2 Fritzing
1.2.3 Cooking-Hacks: Arduino Starter Kit
1.2.4 Arduino Sidekick Basic kit
1.3 Matlab Simulink
1.4 Arduino Software
1.5 Testing
2. Matlab Simulink and Arduino
2.1 Matlab
2.2 Installing Arduino for Simulink Target
3. Hello World - Matlab Simulink and Arduino
3.1 Hello World
3.2 Creating Arduino Simulink
3.2.1 Configuring Arduino Digital Output
3.2.2 Configuring Pulse Generator
3.2.3 Configuring Scope
3.3 Configuring Arduino
3.3 Running Simulink
4. Simulink with Arduino Digital I/O
4.1 Working with Arduino Digital I/O

4.2 Digital Sources
4.3 Simulink with Arduino Digital I/O
4.3.1 Digital Input
4.3.2 Digital Output
4.3.3 Logical Operator
4.3.4 Pulse Generator
4.3.5 Configuring Hardware
4.4 Testing
5. Simulink with Arduino Analog I/O
5.1 Simulink with Arduino Analog Input
5.1.1 Reading Temperature Analog Sensor
5.1.2 Building Simulink Model
5.1.3 Executing Simulink Model
5.2 Simulink with Arduino Analog Output
5.2.1 Controlling RGB LED Color
6. Simulink with Arduino Serial
6.1 Arduino Serial Communication
6.3 Building a Simulink Model
6.3.1 Serial Transmit
6.3.2 Serial Receive
6.3.3 Counter Limited
6.3.4 Data Type Conversion
6.4 Testing
7. Simulink with Arduino and Servo Motor
7.1 Servo Motor
7.2 Building A Simulink Hardware
7.3 Building A Simulink Model with Arduino and Servo Motor
7.3.1 Standard Servo Write

7.3.2 Standard Servo Read
7.4 Testing
Contact

Preface
This book was written to help anyone wants to get started in Arduino and Matlab Simulink. It
describes all the basic elements of the Arduino and Matlab Simulink with step-by-step approach.
Agus Kurniawan
Berlin, September 2013

1. Preparing Development Environment
To develop a program with Matlab Simulink and Arduino, you need the following required
environment:
Arduino
Matlab
Arduino software
Electronic components for testing
In this chapter, I'm going to explain in brief required items for Matlab simulink and Arduino
development.
1.1 Arduino
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware
and software. This board uses Atmel microcontroller series. There are many Arduino hardware
models that you can use. Further information about Arduino products, you can visit on
website http://arduino.cc/en/ .
You must one Arduino hardware to follow practices in this book. I recommend to obtain one of the
following Arduino hardware:
Arduino Uno
Arduino Leonardo
Arduino Mega 2560
Arduino Due
You can buy this product on your local electronic store. You also can order it by online. Find it
on http://arduino.cc/en/Main/Buy. The following is the list of Arduino store you can buy
Arduino store, http://store.arduino.cc/
Amazon, http://www.amazon.com
Cooking-hacks, http://www.cooking-hacks.com/index.php/shop/arduino.html
RS Components, http://www.rs-components.com
Element 14, http://www.element14.com
EXP-Tech, http://www.exp-tech.de

Because Arduino is an open-source hardware, people can build it. It's called Arduino compatible.
Generally it's sold in low prices.
1.1.1 Arduino Uno
The Arduino Uno is a microcontroller board based on the ATmega328. You can download the
datasheet file, http://www.atmel.com/dyn/resources/prod_documents/doc8161.pdf .
Further information about Arduino Uno, you can read it
on http://arduino.cc/en/Main/ArduinoBoardUno .
1.1.2 Arduino Leonardo
The Arduino Leonardo is a microcontroller board based on the ATmega32u4. Download dataset for
this product on http://www.atmel.com/dyn/resources/prod_documents/7766S.pdf .
Visit this product to get the further information
on http://arduino.cc/en/Main/ArduinoBoardLeonardo .

1.1.3 Arduino Mega 2560
The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. You can download
the dataset file on http://www.atmel.com/dyn/resources/prod_documents/doc2549.PDF.
Further information about Arduino Mega 2560, you can visit
on http://arduino.cc/en/Main/ArduinoBoardMega2560 .
1.1.4 Arduino Due
The Arduino Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU.
You can download the datasheet, http://www.atmel.com/Images/doc11057.pdf.
If you want to know about Arduino Due, I recommend to visit this

website, http://arduino.cc/en/Main/ArduinoBoardDue.
1.2 Electronic Components
We need electronic components to build our testing, for instance, Resistor, LED, sensor devices and
etc. I recommend you can buy electronic component kit.
1.2.1 Arduino Starter Kit
Store website: http://arduino.cc/en/Main/ArduinoStarterKit

1.2.2 Fritzing
Store website: http://shop.fritzing.org/ .
You can buy Fritzing Starter Kit with Arduino UNO or Fritzing Starter Kit with Arduino Mega.

1.2.3 Cooking-Hacks: Arduino Starter Kit
Store website: http://www.cooking-hacks.com/index.php/shop/arduino/starter-kits/arduino-starter-
kit.html
1.2.4 Arduino Sidekick Basic kit
Store website: http://www.seeedstudio.com/depot/arduino-sidekick-basic-kit-p-775.html
Alternative online store

http://www.amazon.com/Arduino-Sidekick-Basic-Kit-Version/dp/B007B14HM8/
http://www.exp-tech.de/Zubehoer/Arduino-Sidekick-Basic-Kit.html
1.3 Matlab Simulink
You can work with Matlab Simulink with targeting on Arduino using Matlab 2013a or the latest
version. You also can work with Matlab 2013a Student Version.
1.4 Arduino Software

To develop application based on Arduino board, we need Arduino software. You can obtain it
on http://arduino.cc/en/Main/Software . Please install based on your platform.
If your platform is Ubuntu, you can install by writing this script
sudo apt-get install arduino
For Windows platform, you can download setup file and install it.
The following is a screenshot of Arduino software on Ubuntu platform.
Here is Arduino software on Windows 8 platform.

If you run Arduino software on Windows platform, you should configure arduino.exe running as
Administrator. You can change it by editing file property. Click Compatibility and then checked Run
this program as an administrator.

1.5 Testing
For testing, I used Arduino Uno and Arduino Mega 2560 on Ubuntu and Windows 8 platforms.

I also used Arduino Sidekick Basic kit for electronic components.

2. Matlab Simulink and Arduino
This chapter explains how to work with Matlab Simulink and Arduino Software.
2.1 Matlab
You can work with Matlab Simulink with targeting on Arduino using Matlab 2013a or the latest
version. You also can work with Matlab 2013a Student Version.
2.2 Installing Arduino for Simulink Target
You need internet connection to download Arduino package.
Now run your Matlab and then click Add-Ons. You can see the menu as below.

Select Get Hardware Support Packages.
Then you will obtain a dialog, called Support Package Installer.
Select Internet (recommended).
You may log in to MathWorks Account to continue installation process. Click Log In and then entry
your username and password.

After that, click Next button.

Check Arduino and then click Next button.
You will see a license agreement as below.

Checked I accept. If done, click Next button.

Click Install button.
It will download Arduino package and then install it.
If success, you will obtain a dialog as below.

Click Finish button.
Now you see Arduino on Simulink Library Browser.

3. Hello World - Matlab Simulink and Arduino
In this chapter we create as simple Matlab Simulink with Arduino.
3.1 Hello World
We are going to build a simple Matlab Simulink with Arduino, called Hello World. In this scenario,
we work with LED on Arduino.
If you see Matlab Simulink Library on Arduino, you can see Digital Output library. This library
generates digital output on Arduino. We will use this library on our model to turn on and off our LED.

3.2 Creating Arduino Simulink
Now we are ready to build a "hello world" Matlab Simulink with Arduino. Follow all steps.
Firstly run your Matlab 2013a or the latest version.
On Home, click + New icon. Then you will obtain a menu as below.

Select Simulink Model.
Then you obtain a Simulink dialog as below.

Next step, we build a simulink model.
On the Simulik Model dialog, click menu Tools -> Library Browser.
Then you will the list of Simulink library include Arduino library.
Click Simulink Support Package for Arduino Hardware, then you will see all Arduino installed
library.

For our scenario, hello world, we create a simulink as below.

You need three libraries as follows
Digital Output on Simulink Support Package for Raspberry Pi Hardware
Pulse Generator on Sources
Scope on Commonly Used Blocks
After all items connected, we configure these.
3.2.1 Configuring Arduino Digital Output
To configure Arduino Digital Output, double-click Digital Output on model. Then you obtain a dialog
as below

You entry which digital pin on your Arduino board that LED is connected. If finished, click OK
button.
3.2.2 Configuring Pulse Generator
Double click on Pulse Generator so you obtain a dialog as below

For testing, we use configurations as follows:
Pulse type: Sample based
Time (t): Use simulation time
Amplitude: 1
Period: 10
Pulse width: 5
Phase delay: 0
Sample time: 0.2
Checked Interpret vector parameters as 1-D

If done, click OK button.
3.2.3 Configuring Scope
You don't need configure anything for scope library. You can do a double click on scope library and
then you can see a graphic.
Now you can configure your LED to plug into Arduino. The following is Arduino and LED
configuration. LED is connected to digital pin 10. You may change this digital pin.
3.3 Running Simulink
Save your model, for instance, helloworld.
You test and validate your model. Make sure you select Normal. Then, click Arrow, shown in Figure
below.

If success, you don't see the error dialog.
Now you are ready to deploy to Arduino and run it.
To run this model to Arduino, you must configure. How? Click menu Tools -> Run on Target
Hardware -> Prepare to Run.
Then you will obtain a dialog as below.

Select Arduino on Target hardware. In this scenario, I used Arduino Mega 2560.
Click OK button.
After that, you will see Arduino configuration.

Choose Set host COM port for your Arduino device. Make sure your Arduino already connected.
For COM setting, I chosen Automatically.
Checked Enable External mode to obtain feedback results from Arduino.
To deploy and run on Arduino, click menu Tools -> Run on Target Hardware -> Run .

Matlab will be compile the model and send it to Arduino. You can see the compiling process shown
in Figure below.
If process is success, you will see the LED is blinked.

Then you also can see a graphic on Scope as follow.

4. Simulink with Arduino Digital I/O
This chapter explains how to program simulink using Arduino Digital I/O.
4.1 Working with Arduino Digital I/O
Arduino provides digital I/O that we can use easily. In this scenario, we will build a simple
simulation for Matlab simulink. We use digital sources as Arduino digital input. You can use any
digital source, for instance, digital sensor, button, etc. I use Arduino Uno as digital source.
The following is our scenario for building Matlab simulink.
4.2 Digital Sources
I build a simple Arduino code to generate digital signal.
Open your arduino application and write this script
int signal = 13;
void setup() {

pinMode(signal, OUTPUT);
}
void loop() {
digitalWrite(signal, HIGH);
delay(2000);
digitalWrite(signal, LOW);
delay(1000);
digitalWrite(signal, HIGH);
delay(1000);
digitalWrite(signal, LOW);
delay(500);
}
You also can see a sample code as below.
4.3 Simulink with Arduino Digital I/O

In this section, we're going to a simulink model with Arduino and LED.
The following is a simulink model.
Notes:
Digital Input and Digital Output on Simulink Support Package for Arduino Hardware
Logical Operator on Commonly Used Blocks
Pulse Generator on Sources
Now we start to build a simulink model and configure it.
4.3.1 Digital Input
Arduino digital input will be connected to digital source, such as digital sensor. You can configure
what digital input pin is be used on Arduino. In this scenario, I used digital input pin 8.

The following is a screenshot of digital input dialog.
4.3.2 Digital Output
After you open a Digital Output dialog, you will obtain a dialog shown in Figure below.

Fill pin for Arduino digital output. I used pin 10 for my scenario.
If finished, click OK button.
4.3.3 Logical Operator
Double click Logical Operator library and then you will a dialog shown in Figure below.

Chosen AND on Operator and Number of Input ports is 2.
Click OK if finished.
4.3.4 Pulse Generator
The next task is to configure a pulse generator library. Double click this library and then you will
obtain a dialog as follows.

The following is my configuration for the pulse generator library:
Pulse type : Sample based
Time (t): Use simulation time
Amplitude: 1
Period: 10
Pulse width: 5
Phase delay: 0
Sample time: 0.2

4.3.5 Configuring Hardware
Now you can connect your hardware, Arduino, digital source and LED. For my scenario, I used
Arduino as digital source and connect to digital pin 8. The following is my hardware configuration.
4.4 Testing
After we build a simulink model and Arduino hardware, we can build and deploy to Arduino. Please
read chapter 3 section 3.3 if you don't know how to build and run a Arduino simulink.
If your model run successfully, you see that LED turned on and off.

You also can open Scope for digital input. Then you see the digital signal (pulse signal) graphic on
Scope library. The following is a sample graphic.

Open Scope library for pulse generator too. You can see a sample graphic as below.
Scope for AND operation shows the result of AND operation between digital input and pulse
generator. The following is a sample graphic.

5. Simulink with Arduino Analog I/O
This chapter explains how to work with Arduino Analog I/O and Matlab Simulink. We build two
simulink models to illustrate how to use Arduino analog I/O. The following are our scenarios:
Reading temperature sensor using Arduino analog input
Controlling RGB LED color using Arduino analog output (PWM)
5.1 Simulink with Arduino Analog Input
Arduino can be interfaced with sensor devices. You can see the list of sensor interface
on http://playground.arduino.cc/Main/InterfacingWithHardware .
In this scenario, we use cheap temperature sensor device, thermistor. Thermistor can be used to
measure temperature. I have thermistor 503 from Arduino Sidekick Basic kit. Thermistor 508 can be
shown in Figure below.
Now we can start to build simulink model to read temperature analog sensor.
5.1.1 Reading Temperature Analog Sensor
To build sensor hardware, we need resistor 50k ohm. If your thermistor is 10k ohm, you should use a
resistor with 10k ohm.

The following is a circuit schema for thermistor sensor.
We use a divider approach. One of sensor pin is connected to 5V Arduino pin. Thermistor 503 is
attached to the Analog In of Arduino, A4. The following is hardware implementation.

Normally Arduino ADC generates value 0 - 1023. To read sensor data, I used an approach based on
this site, http://playground.arduino.cc/ComponentLib/Thermistor2 . In this scenario I used Celsius
unit. How to read and to convert to Celsius unit you can use the following function.
double Thermister(int RawADC) {
double Temp;
Temp = log(((10240000/RawADC) - 10000));
Temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * Temp * Temp ))* T
Temp = Temp - 273.15; // Convert Kelvin to Celcius
return Temp;
}
RawADC is a sensor value from Arduino analog input. This function will be implemented in simulink
model.
Now you can build simulink model. The following is a simulink model to read temperature sensor.

For analog input, I used pin 4. You may change it based on your hardware implementation.

The second module is subsystem. This module is Thermistor function implementation. The following
is function implementation.

Notes:
Devide, Add, Subtract, Product, Math Function on Math Operations
Constant on Commonly Used Blocks

Make sure all modules must be configured Output data type as double. The following is a sample of
Output data type.
You also can use Matlab function that you can create to change a Subsystem.
After build simulink model, plug in your hardware into computer. Now you can execute your
simulink. Read chapter 3 to configure simulink for Arduino.
The following is a scope output of Arduino input.

You can see Arduino read sensor values around 524-525. After that, these values will be converted to
Celcius using Thermistor function.
The following is a scope output from Thermistor function.

You can see the temperature data, for instance, on time 2 temperature has 26.16 Celcius.
5.2 Simulink with Arduino Analog Output
The second scenario we build a simulink to control RGB LED color using Arduino Analog output
(PWM). RGB LED has 4 pins that you can see it on Figure below.

To understand these pins, you can see the following Figure.
Note:
Pin 1: Red
Pin 2: Common pin
Pin 3: Green
Pin 4: Blue

Now we can start to build a simulink and hardware implementation.
5.2.1 Controlling RGB LED Color
Firstly we implement sensor hardware. The following is a hardware schema.
Note:
RGB LED pin 1 is connected to Arduino PWM pin 6
RGB LED pin 2 is connected to Arduino VCC 5V
Here is a sample implementation.

Now we can build a simulink mode. Run your Matlab application and create a new Model.
Build a model as follows.

Note:
Repeating Sequence library can be found on Sources.
On PWM library you can set Arduino PWM pin. In this case, I used Arduino PWN pins: 6, 5, and 4.

On Repeating Sequence for PWM pin 6, you configure as follows.

Configure Repeating Sequence for PWM pin 5 as below.
Finally you can configure Repeating Sequence for PWM pin 4 as follows.

If done, save your a simulink model.
Plug your Arduino with RGB LED into computer. After that, compile your model. If success,
configure a model with Arduino hardware target. Read chapter 3 to configure a model for Arduino.
If your model doesn't has any error while deploying to Arduino, you will see RGB LED shows some
colors based on RGB value. The following is a sample output for Arduino and RGB LED.
You also can see the output of red values shown on Figure below.

The output of green values can be seen as below.

The last you can see the output of blue values as below.

6. Simulink with Arduino Serial
This chapter explains how to program simulink using Arduino Serial.
6.1 Arduino Serial Communication
Arduino provides serial port that we can use easily. In this scenario, we will build a simple
simulation for Matlab simulink. The following is information related to Arduino serial
Arduino Uno has serial port: Rx (pin 0) and Tx (pin 1)
Arduino Mega has 4 serial ports: Rx 0 (pin 0) Tx 0 (pin 1), Rx 1 (pin 19) Tx (pin 18), Rx 2
(pin 17) Tx 2 (pin 16), Rx 3 (pin 15) Tx 3 (pin 14)
For Arduino Mega, you can not use serial port 0 (Rx 0 and Tx 0).
In this scenario, we use 2 Arduino devices, Arduino Mega 2560 and Arduino Mega 1280. The second
Arduino is be used as "bridge". It receives serial data from the first Arduino and then it will be sent
back to the first Arduino.
To build a serial communication with two Arduino devices, you must interchange between Rx and Tx
cables. The following is a Arduino schema for serial communication.

In this scenario, I used serial Rx 1 Tx 1 connected to the second Arduino on Rx 0 Tx 0.
You can see a sample implementation as below.

As I said, the second Arduino is be used as "bridge". We must write code to receive serial data and
send back to serial port.
Now open Arduino application. Then write this code.
int data = 0;
void setup()
{
Serial.begin(9600);
}
void loop()
{
if (Serial.available() > 0) {
data = Serial.read();
Serial.write(data);
}
}

The following is a code implementation on Arduino application.
Save all codes for the second Arduino. Before you compile and upload codes to the second Arduino,
you must unplug cables from Rx 0 Tx 0. If not, you fail to upload codes to Arduino because it seems
serial port 0 that is be used.
6.3 Building a Simulink Model
In this section, we're going to a simulink model with Arduino serial port.
The following is a simulink model.

Notes:
Serial Transmit and Serial Receive on Simulink Support Package for Arduino Hardware
Data Type Conversion on Commonly Used Blocks
Arduino transmit library is be used to send data. I used serial port 1.
The following is a screenshot of serial transmit dialog.

Fill 1 on Port number. If done, click OK button.
6.3.2 Serial Receive
After you open Serial receive library, you will obtain a dialog shown in Figure below.

Fill 1 for Port number. If finished, click OK button.
Double click Counter Limited library and then you will a dialog shown in Figure below.

Fill 10 for Upper limit. Click OK if finished.
6.3.4 Data Type Conversion
The next task is to configure a data type conversion library. Double click this library and then you
will obtain a dialog as follows.

Change Output data type uint8. If done, click OK button.
6.4 Testing
If success, open scope library. You can see values that was be sent to to serial transmit on the first
Arduino.

Now open the second scope. As you know, the second Arduino will send back the received data from
serial input (Rx 0). After that, the first Arduino will receive this data. You can see the result the
following Figure as below.
You can see on time 0 to 1, the first Arduino received noise signal data. After time 1, the first Arduino
received the normal data.

7. Simulink with Arduino and Servo Motor
This chapter explains how to program simulink using Arduino and Servo motor.
7.1 Servo Motor
Servo motor provides a shaft movement 360 degree. We can control this movement based on its
degree. In this scenario, you can use any DC motor (servo) that will be connected to Arduino. I used a
mini servo from Arduino Sidekick Basic kit.
The following is a picture of my mini servo motor.
To understand servo's cables, you can identify as follows:
Red cable is be connected to 5V
Black or brown cable is be connected to GND
The rest (yellow or orange cable) is be connected to Arduino PWM pin

The next step we are going to build a simulink with Arduino and servo motor.
7.2 Building A Simulink Hardware
In a simulink scenario, we will control a servo from Matlab. We also read the shaft position of servo
and show the result on graphic and serial port. The following is a general idea that we will
implement.
I used two Arduino devices, Arduino Mega 2560 and Arduino Mega 1280. The second Arduino is be
used to receive serial data so we check on a serial monitor application to see serial data.
The following is my hardware implementation.

Ok, let's build our simulink hardware. Firstly, we build a program for the second Arduino.
Open your Arduino application and write this script
int data = 0;
void setup()
{
Serial.begin(9600);
}
void loop()
{
if (Serial.available() > 0) {
data = Serial.read();

Serial.print("received: ");
Serial.println(data);
}
}
You also can see a sample code as below.
Save the code. Then compile and upload code to the second Arduino. Don't forget to change board
and port based on your Arduino model. When you upload a program to Arduino, please unplug any
cable from serial pins (Rx Tx pins).
7.3 Building A Simulink Model with Arduino and Servo Motor
In this section, we're going to a simulink model with Arduino and servo motor.

The following is a simulink model that we will build.
Notes:
Standard Servo Write, Standard Servo Read and Serial Transmit on Simulink Support Package
for Arduino Hardware
Counter Limited on Sources
7.3.1 Standard Servo Write

Arduino servo write library is be used to control a servo. In this scenario, I used digital input pin 10.
The following is a screenshot of digital input dialog.
To work with standard servo write, we can give input between 0 and 180 to this library.
7.3.2 Standard Servo Read
After you open standard servo read library, you will obtain a dialog shown in Figure below.

Fill pin same as pin value on standard servo write library. Fill 0.5 on Sample time.
If finished, click OK button.
We will obtain a value from this library between 0 and 180.
Counter limited library is be used to generate a value for standard servo write library. Double click
counter limited library and then you will a dialog shown in Figure below.

Fill 180 for Upper limit and Sample time is 0.5.
Click OK button if finished.
The output of standard servo read can be sent to serial port. We can use serial transmit library.
Configure this library as follows.

Fill serial port pin. It depends on your Arduino model.
Click OK button if finished.
7.4 Testing
Before you run the simulink model, set simulation stop time about 90. You can change it that depends
on your period time. Now you run this the simulink model.
Now you can open a scope library to see data from the standard servo read library.

You can open a serial monitor on the second Arduino to see incoming serial data.
If you run your simulink model with disabled Enable External mode, I recommend to change period
time into 1 and simulation stop time 180.

Contact
If you have question related to this book, please contact me at aguskur@hotmail.com . My blog:
http://blog.aguskurniawan.net .
Source code can be downloaded on http://www.aguskurniawan.net/book/matlab_arduino.zip .

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