1 / 6

Arduino

Arduino. Josh Villbrandt February 4, 2012. Digital Circuits. Analog versus digital What’s the difference? How to represent an analog signal in a computer? How to measure an analog signal? voltage divider analog to digital converter (ADC) Combinational logic

melita
Download Presentation

Arduino

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Arduino Josh Villbrandt February 4, 2012

  2. Digital Circuits • Analog versus digital • What’s the difference? • How to represent an analog signal in a computer? • How to measure an analog signal? • voltage divider • analog to digital converter (ADC) • Combinational logic • logic gates (built from transistors) • AND/NAND, OR/XOR, NOR/XNOR • Add gates together to make functional blocks • Add, subtract, multiply, divide, mux, demux • Sequential logic • SR-latch • Basis for “memory”

  3. Microcontrollers • Combines commonly used functional blocks together • Arithmetic Logic Unit (ALU) • CPU register • Provides an instruction set • Fetch, decode, execute • This happens each clock cycle

  4. ATmega328 • 8 bit microcontroller at 16MHz • Memory • 32KB Flash (bootloader and program storage) • 2KB SRAM (run-time “memory”) • 1KB EEPROM (program controlled permanent storage; like a hard drive) • Features • Two 8-bit timers and one 16-bit timer • 14 digital pins (input or output) • 2 pins can be used for TTL (transistor-transitor logic) serial – universal synchronous/asynchronous receiver/transmitter (USART or UART) • Can use all pins as “software” serial • Easily converted to RS-232 (-25V to -3V and 3V to 25V instead of 0V and 5V) • 6 pins can be used for 8-bit Pulse Width Modulation (PWM) • 4 pins can be used for Serial Peripheral Interface (SPI) • Fast, synchronous, short distances • Can enable an internal pull-up resistor on each line • 6 (or 8) analog input pins (10 bit) • 2 pins can be used for two wire interface (TWI) including Inter-Integrated Circuit communication (I2C) • Multi-master, multi-slave, up to 128 devices on one bus, generally low speed

  5. Arduino • An ATmega328 microcontroller wrapped with some convenience circuits • FTDI converts TTL serial to USB • Power regulation, USB overcurrent protection • Standardized form factor means people can build and share daughter boards (“shields”) • Motor shield • Bluetooth, wifi, or GSM shield • Proto shield • LED on pin 13 • Reset button

  6. More Info • General microcontroller explanation from semiconductors and up • http://www.coactionos.com/embedded-design/135-how-microcontrollers-work.html?showall=&limitstart= • Arduino UNO spec page with ATmega328 datasheet: • http://arduino.cc/en/Main/ArduinoBoardUno

More Related