phoddie

uintptr_t - integer type large enough to hold pointer

  #include "stdint.h"

  void *xp = // some pointer
  uintptr_t xi = (uintptr_t)xp;
  int *xp2 = (void *)xi;
  // xp == xp2 on all systems

phoddie

function tracePacket(bytes)
{
	for (let i = 0; i < bytes.length; i += 16) {
		let end = i + 16;
		if (end > bytes.length) end = bytes.length;
		for (let j = i; j < end; j++) {
			let byte = bytes[j].toString(16);
			if (byte.length < 2) byte = "0" + byte;
			trace(byte, " ");
		}

phoddie

Output from xsuse on ESP8266.

June 22, 2018

Boolean: 0 bytes
Number: 0 bytes
String `String in ROM`: 0 bytes
String `fromCharCode(32)`: 12 chunk bytes = 12 bytes
String `String in ` + 'RAM': 24 chunk bytes = 24 bytes
Object {}: 0 bytes
Object {x: 1}: 2 slots = 32 bytes

phoddie

I/O class pattern

Copyright 2018 Moddable Tech, Inc.
Peter Hoddie
Patrick Soquet
Updated December 17, 2018

Overview

The I/O class pattern is designed to be applied to many different interfaces. These include digital, analog input, SPI, I2C, serial, TCP socket, UDP socket, etc. Each of these defines a class pattern for the interface (e.g. a Digital class pattern) that is a logical subclass of the I/O class pattern.

The I/O class pattern assumes read and write operations will not block for significant periods of time (this is deliberately not quantified). The model for this is non-blocking network sockets.

phoddie

#!/usr/bin/env node

const firmata = require("./lib/firmata");
const Etherport = require("Etherport");
const repl = require("repl");
console.log('Enter USB Port or "etherport" and press enter:');
process.stdin.resume();
process.stdin.setEncoding("utf8");
process.stdin.once("data", (chunk) => {
  chunk = chunk.replace("\n", "");

phoddie

/*
 * Copyright (c) 2019  Moddable Tech, Inc.
 *
 *   This file is part of the Moddable SDK.
 *
 *   This work is licensed under the
 *       Creative Commons Attribution 4.0 International License.
 *   To view a copy of this license, visit
 *       <http://creativecommons.org/licenses/by/4.0>.
 *   or send a letter to Creative Commons, PO Box 1866,

phoddie

import { link, test } from "test"
trace(link)
trace(test())
debugger

phoddie

function traceBuffer(buffer) {
	const bytes = new Uint8Array(buffer);
	trace(`${bytes.length} byte ArrayBuffer\n`);
	for (let i = 0; i < bytes.length; i += 16) {
		let use = Math.min(bytes.length - i, 16);
		let line = "";
		for (let j = i; j < (i + use); j++) {
			if (j !== i)
				line += ", ";
			line += bytes[j].toString(16).padStart(2, 0);

phoddie

function traceBuffer(buffer) {
	const bytes = new Uint8Array(buffer);
	trace(`${bytes.length} byte ArrayBuffer\n`);
	for (let i = 0; i < bytes.length; i += 16) {
		let line = [];
		const end = i + Math.min(bytes.length - i, 16);
		for (let j = i; j < end; j++)
			line.push(bytes[j].toString(16).padStart(2, 0));
		line = line.join(", ") + "    ";
		for (let j = i; j < end; j++) {

phoddie

The Project Gutenberg EBook of Bartleby, The Scrivener, by Herman Melville

This eBook is for the use of anyone anywhere at no cost and with
almost no restrictions whatsoever.  You may copy it, give it away or
re-use it under the terms of the Project Gutenberg License included
with this eBook or online at www.gutenberg.net


Title: Bartleby, The Scrivener
       A Story of Wall-Street