370 lines
8.8 KiB
JavaScript
370 lines
8.8 KiB
JavaScript
'use strict'
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const SerialPort = require('serialport')
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const Readline = SerialPort.parsers.Readline
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const exec = require('child_process').exec
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const parser = new Readline('')
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const newlineRe = new RegExp('\n', 'g')
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const returnRe = new RegExp('\r', 'g')
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let eventEmitter
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let cfg
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/**
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* Pause the process for X milliseconds in async/await functions
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*
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* @param {integer} ms milliseconds
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*
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* @returns {Promise} Resolves after wait
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**/
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async function delay (ms) {
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return new Promise(resolve => {
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return setTimeout(resolve, ms)
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})
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}
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/**
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* Send a command to an Arduino using async/await
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*
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* @param {string} device Arduino identifier
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* @param {string} cmd Single character command to send
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*
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* @returns {Promise} Resolves after sending
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**/
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async function send (device, cmd) {
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return new Promise ((resolve, reject) => {
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arduino.queue[cmd] = (ms) => {
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return resolve(ms)
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}
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return arduino.serial[device].write(cmd, (err, results) => {
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if (err) {
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//console.error(err)
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return reject(err)
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}
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//
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})
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})
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}
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/**
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* Send a string to an Arduino using async/await
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*
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* @param {string} device Arduino identifier
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* @param {string} str String to send
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*
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* @returns {Promise} Resolves after sending
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**/
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async function write (device, str) {
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return new Promise ((resolve, reject) => {
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arduino.serial[device].write(str, function (err, results) {
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if (err) {
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return reject(err)
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}
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//console.log('sent: ' + str)
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return resolve(results)
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})
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})
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}
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/**
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* Connect to an Arduino using async/await
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*
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* @param {string} device Arduino identifier
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*
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* @returns {Promise} Resolves after opening
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**/
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async function open (device) {
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return new Promise((resolve, reject) => {
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return arduino.serial[device].open(error => {
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if (error) {
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return reject(error)
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}
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return resolve(true)
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})
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})
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}
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/**
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* Close a connection to an Arduino using async/await
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*
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* @param {string} device Arduino identifier
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*
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* @returns {Promise} Resolves after closing
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**/
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async function close (device) {
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return new Promise((resolve, reject) => {
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return arduino.serial[device].close((err) => {
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if (err) {
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return reject(err)
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}
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return resolve(true)
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})
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})
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}
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/******
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Arduino handlers
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*******/
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const arduino = {
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path : {},
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known: [
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'/dev/tty.usbmodem1a161',
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'/dev/tty.usbserial-A800f8dk',
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'/dev/tty.usbserial-A900cebm',
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'/dev/tty.usbmodem1a131',
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'/dev/tty.usbserial-a900f6de',
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'/dev/tty.usbmodem1a141',
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'/dev/ttyACM0',
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'COM3'
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],
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alias : {
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},
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serial : {
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connect : {},
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projector : {},
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camera : {},
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light : {}
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},
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baud : 57600,
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queue : {},
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timer : 0,
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lock : false,
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locks : {
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}
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}
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arduino.enumerate = async function () {
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return new Promise( (resolve, reject) => {
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return SerialPort.list((err, ports) => {
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let matches = []
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if (err) {
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return reject(err)
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}
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ports.forEach(port => {
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if (arduino.known.indexOf(port.comName) !== -1) {
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matches.push(port.comName)
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} else if ((port.manufacturer + '').toLowerCase().indexOf('arduino') !== -1) {
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matches.push(port.comName)
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}
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})
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if (matches.length === 0) {
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return reject('No USB devices found');
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} else if (matches.length > 0) {
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return resolve(matches)
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}
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})
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})
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}
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//commands which respond to a sent char
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arduino.send = async function (serial, cmd, res) {
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const device = arduino.alias[serial]
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let results
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if (arduino.locks[serial]) {
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return false
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}
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arduino.locks[serial] = true
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await delay(cfg.arduino.serialDelay)
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try {
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results = await send(device, cmd)
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} catch (e) {
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return console.error(e)
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}
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arduino.locks[serial] = false
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arduino.timer = new Date().getTime()
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return await eventEmitter.emit('arduino_send', cmd)
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}
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//send strings, after char triggers firmware to accept
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arduino.string = async function (serial, str) {
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const device = arduino.alias[serial]
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let writeSuccess
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await delay(cfg.arduino.serialDelay)
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if (typeof arduino.serial[device].fake !== 'undefined'
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&& arduino.serial[device].fake) {
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return arduino.serial[device].string(str)
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} else {
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try {
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writeSuccess = await write(device, str)
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} catch (e) {
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return console.error(e)
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}
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return writeSuccess
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}
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}
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//respond with same char over serial when done
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arduino.end = async function (serial, data) {
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const end = new Date().getTime()
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const ms = end - arduino.timer
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let complete
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if (arduino.queue[data] !== undefined) {
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arduino.locks[serial] = false;
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//console.log('Command ' + data + ' took ' + ms + 'ms');
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complete = arduino.queue[data](ms) //execute callback
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eventEmitter.emit('arduino_end', data)
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delete arduino.queue[data]
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} else {
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//console.log('Received stray "' + data + '"'); //silent to user
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}
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return complete
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};
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arduino.alias = function (serial, device) {
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console.log(`Making "${serial}" an alias of ${device}`)
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arduino.alias[serial] = device
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}
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arduino.connect = async function (serial, device, confirm) {
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return new Promise(async (resolve, reject) => {
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let connectSuccess
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arduino.path[serial] = device;
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arduino.alias[serial] = device;
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arduino.serial[device] = new SerialPort(arduino.path[serial], {
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autoOpen : false,
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baudRate: cfg.arduino.baud,
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parser: parser
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})
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arduino.locks[device] = false
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try {
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connectSuccess = await open(device)
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} catch (e) {
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console.error('failed to open: ' + e)
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return reject(e)
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}
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console.log(`Opened connection with ${arduino.path[serial]} as ${serial}`);
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if (!confirm) {
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arduino.serial[device].on('data', async (data) => {
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let d = data.toString('utf8')
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d = d.replace(newlineRe, '').replace(returnRe, '')
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return await arduino.end(serial, d)
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})
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} else {
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arduino.serial[device].on('data', async (data) => {
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let d = data.toString('utf8')
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d = d.replace(newlineRe, '').replace(returnRe, '')
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return await arduino.confirmEnd(d)
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})
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}
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return resolve(arduino.path[serial])
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})
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}
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arduino.confirmExec = {};
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arduino.confirmEnd = function (data) {
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//console.dir(data)
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if (data === cfg.arduino.cmd.connect
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|| data === cfg.arduino.cmd.proj_identifier
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|| data === cfg.arduino.cmd.cam_identifier
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|| data === cfg.arduino.cmd.light_identifier
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|| data === cfg.arduino.cmd.proj_light_identifier
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|| data === cfg.arduino.cmd.proj_cam_light_identifier
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|| data === cfg.arduino.cmd.proj_cam_identifier ) {
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arduino.confirmExec(null, data);
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arduino.confirmExec = {};
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}
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}
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arduino.verify = async function () {
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return new Promise(async (resolve, reject) => {
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const device = arduino.alias['connect']
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let writeSuccess
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arduino.confirmExec = function (err, data) {
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if (data === cfg.arduino.cmd.connect) {
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return resolve(true)
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} else {
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return reject('Wrong data returned')
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}
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}
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await delay(cfg.arduino.serialDelay)
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try {
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writeSuccess = await send(device, cfg.arduino.cmd.connect)
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} catch (e) {
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return reject(e)
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}
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return resolve(writeSuccess)
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})
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}
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arduino.distinguish = async function () {
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return new Promise(async (resolve, reject) => {
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const device = arduino.alias['connect']
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let writeSuccess
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let type
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arduino.confirmExec = function (err, data) {
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if (data === cfg.arduino.cmd.proj_identifier) {
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type = 'projector'
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} else if (data === cfg.arduino.cmd.cam_identifier) {
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type = 'camera'
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} else if (data === cfg.arduino.cmd.light_identifier) {
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type = 'light'
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} else if (data === cfg.arduino.cmd.proj_light_identifier) {
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type = 'projector,light'
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} else if (data === cfg.arduino.cmd.proj_cam_light_identifier) {
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type = 'projector,camera,light'
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} else if (data === cfg.arduino.cmd.proj_cam_identifier) {
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type = 'projector,camera'
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} else if (data === cfg.ardino.cmd.proj_second_identifier) {
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type = 'projector_second'
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}
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return resolve(type)
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}
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await delay(cfg.arduino.serialDelay)
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try {
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writeSuccess = await send(device, cfg.arduino.cmd.mcopy_identifier)
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} catch (e) {
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console.error(e)
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return reject(e)
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}
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})
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}
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arduino.close = async function (callback) {
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const device = arduino.alias['connect']
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let closeSuccess
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try {
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closeSuccess = await close(device)
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} catch (e) {
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return console.error(e)
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}
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return closeSuccess
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};
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arduino.fakeConnect = async function (serial) {
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//console.log('Connecting to fake arduino...');
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const device = '/dev/fake'
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arduino.alias[serial] = device
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arduino.serial[device] = {
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write : function (cmd, cb) {
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const t = {
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c : cfg.arduino.cam.time + cfg.arduino.cam.delay,
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p : cfg.arduino.proj.time + cfg.arduino.proj.delay
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}
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let timeout = t[cmd]
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let end
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if (typeof timeout === 'undefined') timeout = 10
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arduino.timer = +new Date()
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setTimeout(() => {
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arduino.end(serial, cmd)
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return cb()
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}, timeout)
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},
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string : async function (str) {
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//do nothing
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return true
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},
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fake : true
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};
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//console.log('Connected to fake arduino! Not real! Doesn\'t exist!');
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return true
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}
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if (typeof module !== 'undefined' && module.parent) {
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module.exports = function (c, ee) {
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eventEmitter = ee
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cfg = c
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return arduino
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}
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} |