Arduino Programming - Brief Introduction
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The document provides an overview of Arduino board programming, highlighting its open-source electronics platform, features like USB communication, and use of a dedicated Integrated Development Environment (IDE). It details programming aspects such as functions, variables, and digital I/O pin configurations, while explaining the functionalities of UART, I2C, and SPI interfaces. Additionally, contact information for the issuing organization is included.
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- 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
- 4. Hardware Block Diagram ATMEL AVR MCU SPI I2C UART Digital I/O Analog Inputs USB Interface POWER +5 Volts +3.3 Volts Clock Reset
- 6. Arduino IDE • Allows to write program and upload them into the board • Online Web Editor • Arduino Desktop IDE
- 7. Sketches • Program written using 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
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- 9. Variables • a place to 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;
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- 11. Digital I/O • Generic Pin 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 / Serial Port • 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
- 16. Serial function • begin • end • print • println • readBytes • readString • write • setTimeout • available • availableForWrite
- 17. Inter Integrated Circuit Inteface • 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
- 19. I2C / Wire Functions • 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
- 22. Contact Us • Address : – No 16, First Floor, Ganesh 1st cross street – Madipakkam Koot Road, Chennai • Web : www.neeveetech.com • Email : – [email protected] – [email protected]
- 23. Thank You