![Getting Started
1. Make your circuit with the Arduino and the prototyping
(bread) board
2. Connect the board to your computer via the USB cable
3. Find the serial port
4. Write you Matlab program
– Connect Arduino [a = arduino('COM3')]
– Set Pin Mode [pinMode(a,pin,str)]
– Read/Write Digital/Analog Data
• dVal = digitalRead(a,pin)
• digitalWrite(a,pin,val)
• aVal = analogRead(a,pin)
• analogWrite(a,pin,val)
5. Run](https://image.slidesharecdn.com/gp106-arduino-241010094629-5728bc4e/85/GP106-Arduino-programming-with-matlab-pdn-ac-lk-9-320.jpg)
GP106 - Arduino programming with matlab pdn ac lk
- 1. Microcontroller Programming with Arduino and Matlab
- 2. Microcontrollers • A microcontroller is a small-scale computer with generalized (and programmable) inputs and outputs. • The inputs and outputs can be manipulated by and can manipulate the physical world.
- 3. The Box
- 4. Meet Arduino Uno Analog INPUTS Digital I/O PWM (3, 5, 6, 9, 10, 11) PWR IN USB (to Computer) SCL/SDA (I2C Bus) POWER 5V / 3.3V / GND RESET
- 5. IO Pins Image from Theory and Practice of Tangible User Interfaces at UC Berkley
- 6. Input/Output Image from Theory and Practice of Tangible User Interfaces at UC Berkley
- 7. Breadboard • Each row (horiz.) of 5 holes are connected • Vertical columns – called power bus are connected vertically
- 9. Getting Started 1. Make your circuit with the Arduino and the prototyping (bread) board 2. Connect the board to your computer via the USB cable 3. Find the serial port 4. Write you Matlab program – Connect Arduino [a = arduino('COM3')] – Set Pin Mode [pinMode(a,pin,str)] – Read/Write Digital/Analog Data • dVal = digitalRead(a,pin) • digitalWrite(a,pin,val) • aVal = analogRead(a,pin) • analogWrite(a,pin,val) 5. Run
- 10. Testing the Board • You may test the board by turning on and off the ‘test’ LED that is connected to digital pin #13 . • Matlab code: a = arduino('COM3'); pinMode(a,13,'OUTPUT'); digitalWrite(a,13,0); pause(1); digitalWrite(a,13,1);
- 11. Ex1: Connecting an External LED You can try the same code from Testing the Board program 220 Ohm Resistor (Red-Red-Brown) LED – long-leg (anode, +), short-leg (cathode, -)
- 12. Ex2: Connecting Two External LEDs • Now, let’s connect another LED to pin #11 with a serial register as earlier. • The Matlab code a = arduino('COM3'); pinMode(a,13,'OUTPUT'); pinMode(a,11,'OUTPUT'); digitalWrite(a,11,0); digitalWrite(a,13,0); pause(1); digitalWrite(a,11,1); digitalWrite(a,13,1);
- 13. • Can a digital device produce analog output? Analog Output • Analog output can be simulated using pulse width modulation (PWM) Image from Theory and Practice of Tangible User Interfaces at UC Berkley
- 14. Pulse Width Modulation • Can’t use digital pins to directly supply say 2.5V, but can pulse the output on and off really fast to produce the same effect • The on-off pulsing happens so quickly, the connected output device “sees” the result as a reduction in the voltage Image from Theory and Practice of Tangible User Interfaces at UC Berkley
- 15. PMW Pins • Command: analogWrite(a,pin,va l) • value is duty cycle: between 0 and 255 • Examples: analogWrite(a,9,128) for a 50% duty cycle analogWrite(a,9,64) for a 25% duty cycle Image from Theory and Practice of Tangible User Interfaces at UC Berkley
- 16. Ex3: Analog Output to LED • We will use the same circuit build for example 2. However, we will use analogWrite() • Matlab Code: a = arduino('COM3'); pinMode(a,11,'OUTPUT'); analogWrite(a,11,0); analogWrite(a,11,128); analogWrite(a,11,255);
- 17. Sensors • Typically sensors are analog – Temperature measurement – Light intensity measurement • Arduino uses a 10-bit A/D Converter: – this means that you get input values from 0 to 1023 •0 V 0 •5 V 1023 • A two pin analog sensor will be a variable resistor
- 18. Two Pin Analog Sensors LDR A0
- 19. Ex4: analogRead() from LDR • Connect the circuit as in the last slide • Matlab Code: a = arduino('COM3'); analogRead(a,0);
- 20. Ex5: LDR (analog) -> LED (analog)
- 21. THANK YOU!