9. Embedded Programming

This week: learning how to make a thing do a thing. Intro to: Inputs, Outputs, Sensors, Arduino, and Programming.

The Process & Reading a Datasheet

• Here is the Data sheet I reviewed for the ATTiny44. It was overall pretty impenetrable.

• But I did find something recognizable that I could make sense of: the ATTiny44 Datasheet pinout diagram:

• Here is a slightly more useful ATTiny 44 Pinout Diagram to determine the cooresponding Arduino pins (3 and 7):

Embedded Programming Demo by me on Vimeo.

Useful Links and Notes

• Microcontroller Architecture by CircuitBread
• Arduino Accelerometer Tutorial for the MPU6050
• Fab Acad Tutorial for ATTiny Using Arduino
• Arduino Notes: New Family of boards; add to Board Manager in Arduino

Code Example

Arduino Push Button LED Code:

// constants won't change. They're used here to set pin numbers:
const int buttonPin = 3;     // the number of the pushbutton pin
const int ledPin =  7;      // the number of the LED pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
}

void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }

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Last update: June 13, 2022