/*
  Wokwi custom chip example implementing the AND gate.
*/

#include <TinyDebug.h>

#define A_PIN PB4
#define B_PIN PB3

uint8_t a[4] = { 1, 0, 1, 0 };
uint8_t b[4] = { 0, 1, 1, 0 };

uint8_t i, q;

void setup() {
  Debug.begin();
  pinMode(A_PIN, OUTPUT);
  pinMode(B_PIN, OUTPUT);
}

void loop() {
  // Clear terminal
  Debug.println("\x1b[2J\x1b[;H");

  for (i = 0; i < 4; i++) {
    digitalWrite(A_PIN, a[i]);
    digitalWrite(B_PIN, b[i]);

    q = a[i] & b[i];

    Debug.print("  ");
    Debug.print(a[i]);
    Debug.print(" AND ");
    Debug.print(b[i]);
    Debug.print(" = ");
    Debug.println(q);

    delay(3000);
  }
}


and-gate-chip.ino

diagram.json

// Wokwi Custom Chip - For information and examples see:
// https://link.wokwi.com/custom-chips-alpha
//
// SPDX-License-Identifier: MIT
// Copyright (C) 2022 Uri Shaked / wokwi.com

#include "wokwi-api.h"
#include <stdio.h>
#include <stdlib.h>

DEFINE_PIN(VCC);
DEFINE_PIN(GND);
DEFINE_PIN(A);
DEFINE_PIN(B);
DEFINE_PIN(Q);

typedef struct {
  pin_t pin_a;
  pin_t pin_b;
  pin_t pin_q;
} chip_state_t;

static void update_output(chip_state_t *chip) {
  uint32_t a = digital_read(chip->pin_a);
  uint32_t b = digital_read(chip->pin_b);
  uint32_t q = a & b;
  printf("Update output: %d %d => %d\n", a, b, q);
  digital_write(chip->pin_q, q);
}

chip_state_t* EXPORT(chip_init)(void) {
  chip_state_t *chip = malloc(sizeof(chip_state_t));
  chip->pin_a = pin_init("A", INPUT);
  chip->pin_b = pin_init("B", INPUT);
  chip->pin_q = pin_init("Q", OUTPUT);
  digital_watch(chip->pin_a, BOTH);
  digital_watch(chip->pin_b, BOTH);
  update_output(chip);
  return chip;
}

bool EXPORT(chip_pin_change)(chip_state_t *chip, uint32_t pin, uint32_t value) {
  update_output(chip);
}