Arduino Nano Overview

Notes

• From the datasheet.
• A development board for rapid prototype development.
• Based on the ATmega329 Microcontroller
  • 131 instructions in a RISC architecture
  • 32 8-bit GP Registers
  • 16 MIPS, 16MHz clock
  • 16 bit math
  • 1K of EEPROM
  • 32K of flash memory
• The nanao has
  • 20 digital i/o pins
  • 8 analog i/o pins
  • But some are used for communications
• For us, this can be programmed in a C/C++ mixture language.
  • Language Reference.
  • I am exploring this langauge.
• Programs are called sketches
• A convienent interface is the Arduino IDE.
  • This provides (at least)
    • A code editor
    • A compiler
    • A downloader
    • A serial interface
• The base firmware on the nano includes
  • A boot loader/ hardware initialization
  • A flash memory writer
  • Libraries for handling communications
    • usb communcations
    • Low level I/O
    • Wi-Fi
• We will explore some additional os related hardware as we work our way through.
• For now some basic programming
  • By default each sketch has a void setup() function
    • This is where you initialize things.
    • It is called once before your program begins
  • And a void loop()
    • After initialization, this is called repeatidly

  • int main() {
        setup();
        while(1) {
            loop();
        }
    }

• A simple program

  void setup() {
       pinMode(LED_BUILTIN, OUTPUT);
       Serial.begin(9600);
  
       Serial.println("Initialization Complete");
  }
  
  void loop() {
       Serial.println("In the main loop");
  
       digitalWrite(LED_BUILTIN, HIGH);
       delay(500);
       digitalWrite(LED_BUILTIN, LOW);
       delay(500);
       Serial.println();
  }