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 // 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>
 

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

Contents:

1. Using the API
   • Debugging your custom chip
2. GPIO pins API
3. Analog API
4. Time simulation
5. UART API
6. I2C Device API

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function galoisMultiply1(x, y) {
  const Zi = new Uint32Array(4);
  const Vi = new Uint32Array(y);
  for (let i = 0; i < 128; i++) {
    const xi = (x[i >> 5] & (1 << (31 - (i % 32)))) !== 0;
    if (xi) {
      Zi[0] ^= Vi[0];
      Zi[1] ^= Vi[1];
      Zi[2] ^= Vi[2];
      Zi[3] ^= Vi[3];

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`default_nettype none
`timescale 1ns/1ns
module encoder (
    input clk,
    input reset,
    input a,
    input b,
    output reg [7:0] value
);

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`default_nettype none
`timescale 1ns/1ns
module encoder (
    input clk,
    input reset,
    input a,
    input b,
    output reg [7:0] value
);

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magic
tech sky130A
timestamp 1638034600
<< nwell >>
rect -40 -195 205 -55
<< nmos >>
rect 40 0 55 65
<< pmos >>
rect 40 -140 55 -75
<< ndiff >>

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interface bcm2835gpio

bcm2835gpio_peripheral_base 0xFE000000

# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
# These depend on system clock, calibrated for stock 700MHz
# bcm2835gpio_speed SPEED_COEFF SPEED_OFFSET
bcm2835gpio_speed_coeffs 236181 60

# Each of the JTAG lines need a gpio number set: tck tms tdi tdo

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{
  "project.header.save": "保存",
  "project.header.share": "分享",
  "project.menu.saveACopy": "另存为",
  "project.menu.downloadProjectZip": "下载项目文件",
  "project.menu.simulation": "模拟",

  "editor.fileMenu.rename": "重命名",
  "editor.fileMenu.newFile": "新文件",
  "editor.fileMenu.delete": "",

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{
  "packages": [
    {
      "name": "esp32",
      "maintainer": "Espressif Systems",
      "websiteURL": "https://github.com/espressif/arduino-esp32",
      "email": "hristo@espressif.com",
      "help": {
        "online": "http://esp32.com"
      },

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// Sample output: https://wokwi.com/arduino/projects/287356481917944333

const size = 256;
const center = [150, 150];
const c = 16;

const data = {
  version: 1,
  author: 'Uri Shaked',
  editor: 'wokwi',