# Blank project

CD4077B

 CMOS Quad Exclusive-NOR Gate
## Usage




README.md

diagram.json

cd4077b

cd4077b.chip.json


// SPDX-License-Identifier: MIT
// Copyright 2024 Algovoid



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


typedef struct {
    pin_t pin_A;
    pin_t pin_B;
    pin_t pin_J;

    pin_t pin_K;
    pin_t pin_C;
    pin_t pin_D;

    pin_t pin_E;
    pin_t pin_F;
    pin_t pin_L;

    pin_t pin_M;
    pin_t pin_G;
    pin_t pin_H;

} chip_state_t;


static void set_xor(chip_state_t *chip) {
  pin_write(chip->pin_J,  !( pin_read(chip->pin_A) ^ pin_read(chip->pin_B) )  );
  pin_write(chip->pin_K,  !( pin_read(chip->pin_C) ^ pin_read(chip->pin_D) )  );
  pin_write(chip->pin_L,  !( pin_read(chip->pin_E) ^ pin_read(chip->pin_F) )  );
  pin_write(chip->pin_M,  !( pin_read(chip->pin_G) ^ pin_read(chip->pin_H) )  );

}



static void chip_pin_change(void *user_data, pin_t pin, uint32_t value) {
  chip_state_t *chip = (chip_state_t*)user_data;
  set_xor(chip);
}



void chip_init() {
  printf("Initialize cd4077b chip!\n");
  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_J = pin_init("J", OUTPUT);

  chip->pin_C = pin_init("C", INPUT);
  chip->pin_D = pin_init("D", INPUT);
  chip->pin_K = pin_init("K", OUTPUT);

  chip->pin_E = pin_init("E", INPUT);
  chip->pin_F = pin_init("F", INPUT);
  chip->pin_L = pin_init("L", OUTPUT);

  chip->pin_G = pin_init("G", INPUT);
  chip->pin_H = pin_init("H", INPUT);
  chip->pin_M = pin_init("M", OUTPUT);


  pin_write(chip->pin_A, LOW);
  pin_write(chip->pin_B, LOW);

  pin_write(chip->pin_C, LOW);
  pin_write(chip->pin_D, LOW);

  pin_write(chip->pin_E, LOW);
  pin_write(chip->pin_F, LOW);

  pin_write(chip->pin_G, LOW);
  pin_write(chip->pin_H, LOW);

  const pin_watch_config_t config = {
    .edge = BOTH,
    .pin_change = chip_pin_change,
    .user_data = chip,
  };


  pin_watch(chip->pin_A, &config);
  pin_watch(chip->pin_B, &config);

  pin_watch(chip->pin_C, &config);
  pin_watch(chip->pin_D, &config);

  pin_watch(chip->pin_E, &config);
  pin_watch(chip->pin_F, &config);

  pin_watch(chip->pin_G, &config);
  pin_watch(chip->pin_H, &config);  

  set_xor(chip);

}
