Arduino Programming - Brief Introduction

Arduino Programming - Brief Introduction

• 1.
  Arduino Board Programming Overview
• 2.
  What is Arduino •Open source electronics platform – Easy to use hardware & software • Equipped with sets of analog & digital I/Os • Can be interfaced to extension boards ( shields) • Features USB based communication interface • Provided with Integrated Development Environment • Aimed to provide low-cost and easy way for students & professionals • GNU General Public License
• 3.
  Arduino Board
• 4.
  Hardware Block Diagram ATMELAVR MCU SPI I2C UART Digital I/O Analog Inputs USB Interface POWER +5 Volts +3.3 Volts Clock Reset
• 5.
  Arduino Uno Pinout
• 6.
  Arduino IDE • Allowsto write program and upload them into the board • Online Web Editor • Arduino Desktop IDE
• 7.
  Sketches • Program writtenusing Arduino Software • Written in text editor & save with extension of .ino • Arduino uses this name for a program • Code which will be uploaded and run on the board
• 8.
  IDE Basic Options •New – Creates a new sketch • Open – Allows to load the sketch from the system • Save – Saves the sketch • Verify – Checks the code for errors compiling it • Upload – Compiles the code and uploads to configured board • Serial Monitor – Opens a serial monitor • Quit – Closes all IDE windows
• 9.
  Variables • a placeto store the data • Has name, value and type – Example declaration – int pin = 2; • Specified only once and can be used many times • Variable assignment – pin = 3;
• 10.
  Functions • Setup – Calledwhen a sketch starts – Used to initialize variables, pin modes, start using libraries – Will run only once, after each power up / reset of the board • Loop – Called after creating setup function – Function loops consecutively – Allows the program to change & respond – Actively controls the arduino
• 11.
  Digital I/O • GenericPin on an IC / Board • Configured as Input or Output • Can be enabled / disabled • Logic Level – High – Low • Input values are readable • Output values are writable / readable • Input configured pins also can be used as Interrupt • No predefined purpose
• 12.
  Digital Pin Functions •pinMode – Configures pin as Output or Input – pinMode(pin, mode) • pin : pin number • mode: INPUT, OUTPUT, INPUT_PULLUP • digitalWrite – Writes a High or Low value to a digital pin – digitalWrite(pin, value) • pin : pin number • value : HIGH or LOW
• 13.
  Digital Pin Functions… •digitalRead – Reads the current value of specified pin – int digitalRead(pin) • pin : pin number • Returns the current value
• 14.
  UART / SerialPort • Univeral Asynchronuos Receiver / Transmitter • Supports NRZ encoding format • 7 or 8 bit data • 1 or 2 Stop bits • Hardware Flow Control – RTS – Request to Send – CTS – Clear to Send • Programmable Parity ( even, odd and none ) • RS485, RS232 compatible
• 15.
  UART Interface NXP IMX6 UART Serial Device TXD RXD RTS CTS
• 16.
  Serial function • begin •end • print • println • readBytes • readString • write • setTimeout • available • availableForWrite
• 17.
  Inter Integrated CircuitInteface • Multi master, multi slave serial interface bus • Uses only two bi-directional open drain lines – SDA : Serial Data Line – SCL : Serial Clock Line • Since lines are open drain, these pins needs to be pulled high. – Normally pull up resistor will be 4.7 K / 10K
• 18.
  I2C Model I2C Master uC I2C Slave I2C Slave I2C Slave VCC SCL SDA R R
• 19.
  I2C / WireFunctions • begin • receive • send • onRequest • RequestFrom
• 20.
  Serial Peripheral Interface •Synchronous Serial Communication Interface • Used for Short distance. Basically with in the board • Full duplex mode with master slave architecture • Also called as four-wire bus • Pins – MISO : Master Input Slave Output – MOSI : Master Output Slave Input – SCK : Serial Clock – SS : Slave Select
• 21.
  SPI Model SPI Master SPI Slave 1 MOSI MISO SCK SS1 SPI Slave2 SS2
• 22.
  Contact Us • Address: – No 16, First Floor, Ganesh 1st cross street – Madipakkam Koot Road, Chennai • Web : www.neeveetech.com • Email : – info@neeveetech.com – sales@neeveetech.com
• 23.
  Thank You