/* this file must exist, but can be empty */

template.ino

diagram.json

#include <avr/io.h>

int main()
{
  // set pb0, pb1 and pb2 as inputs
  // activate internal pullup resitors
  DDRB &= ~((0x01<<2) | (0x01<<1) | (0x01<<0)); // binary 0000 0111;
  PORTB |= ((0x01<<2) | (0x01<<1) | (0x01<<0));
  
  // set pb7 as output
  DDRB |= (0x01 << 7);

  // control variables
  bool controlOn = false;
  bool btnOn, btnOff, btnLed;
  
  while (1)
  {
    // read inputs
    btnOn = (PINB & (0x01 << 0)) == 0x00;
    btnOff = (PINB & (0x01 << 1)) == 0x00;
    btnLed = (PINB & (0x01 << 2)) == 0x00;

    // set control
    if (btnOn)
    {
      controlOn = true;
    }
    if (btnOff)
    {
      controlOn = false;
    }

    // when control on and led button pressed ...
    if (controlOn && btnLed)
    {
      // led on
      PORTB |= (0x01 << 7);
    }
    else
    {
      // led off
      PORTB &= ~(0x01 << 7);
    }
  }
}

main.cpp

# Wokwi Library List
# See https://docs.wokwi.com/guides/libraries
