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This document describes the work-in-progress C API for writing custom chips for the Wokwi simulator.

Using the API

First, make sure to include wokwi-api.h. Every external method you declare should be wrapped with the EXPORT macro (e.g. void EXPORT(my_method_name) (uint32_t arg) { ... }). The chip should declare a chip_init method. This method will be called for every new instance of the chip. If the chip has some internal state, chip_init should allocate memory for the internal state and return a pointer to this memory. This pointer will be passed in the first argument for any listener that you declare (e.g. chip_pin_change). For chip without any internal state, simply return NULL.

Here's an example of a minimal chip file:

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<?php

/**
* Lietuviškų vardų linksniai.
*
* @author Maug Lee <mauglee@gmail.com>
* @copyright Copyleft (ↄ) 2011, Maug Lee
* @version 0.3
* @package Vardai
*/

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package main

import (
	"log"
	"runtime"
	"time"

	"github.com/nats-io/nats.go"
	"github.com/nats-io/stan.go"
)

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#!/usr/bin/env bash

# install docker
# https://docs.docker.com/engine/installation/linux/ubuntulinux/

# install docker-compose
# https://docs.docker.com/compose/install/

# install letsencrypt
# https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04

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/*   
   Copyright 2011 Martin Hawksey

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software

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worker.bash /var/www/html/project1 devel

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class MidpointLruCache:
    def __init__(self, size, oldpercentage):
        self.size = size
        self.oldsize = size * oldpercentage / 100
        self.youngsize = size * (100 - oldpercentage) / 100

        self.youngitems = collections.OrderedDict()
        self.olditems = collections.OrderedDict()

    def __call__(self, func):

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// only 1 sensor to test
const int led = 8;
const int echo = 3;
const int trig = 2;

const long wait = 1000; //cooldown time for the sensor
unsigned long last = 0;

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# -*- coding: utf-8 -*-

# i2c bus (0 -- original Pi, 1 -- Rev 2 Pi)
I2CBUS = 1

# LCD Address
ADDRESS = 0x27

import smbus
from time import sleep

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package main

import (
  "fmt"
  "io"
  "io/ioutil"
  "strings"
  "exec"
  "http"
)