119 lines
2.0 KiB
JavaScript
119 lines
2.0 KiB
JavaScript
'use strict'
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let Gpio
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try {
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Gpio = require('onoff').Gpio
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} catch (e) {
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console.warn('Failed including Gpio, using sim')
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Gpio = require('../../lib/onoffsim').Gpio
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}
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const PINS = {
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fwd : {
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pin : 4,
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dir : 'out'
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},
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bwd : {
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pin : 5,
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dir : 'out'
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},
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micro : {
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pin : 6,
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dir : 'in',
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edge : 'rising'
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},
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release : {
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pin : 7,
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dir : 'in',
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edge : 'both'
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}
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}
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class Intval {
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constructor () {
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this._pin = {}
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this._state = {
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dir : true, //forward
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frame : {
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start : 0,
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active : false,
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val : 0,
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expected : 0
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}
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}
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this._declarePins()
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}
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_declarePins () {
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this._pin.fwd = Gpio(4, 'out')
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this._pin.bwd = Gpio(5, 'out')
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this._pin.micro = Gpio(6, 'in', 'rising')
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this._pin.release = Gpio(7, 'in', 'both')
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this._pin.release.watch(this._watchRelease)
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}
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_startFwd () {
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this._pin.fwd.set(1)
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this._pin.bwd.set(0)
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//start high-cpu watch
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}
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_startBwd () {
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this._pin.fwd.set(0)
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this._pin.bwd.set(1)
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}
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_watchMicro (err, val) {
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if (err) {
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console.error(err)
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}
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this._state.frame.val = val
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//determine when to stop
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}
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_watchRelease (err, val) {
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if (err) {
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console.error(err)
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}
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}
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setDir (val = true) {
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if (typeof val !== 'boolean') {
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return console.warn('Direction must be represented as either true or false')
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}
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this._state.dir = val
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}
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frame (dir = true, time = 0, delay = 0) {
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this._state.frame.start = +new Date()
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this._state.frame.active = true
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this._pin.micro.watch(this._watchMicro)
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if (delay !== 0) {
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setTimeout(function () {
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if (dir) {
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this._startFwd()
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} else {
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this._startBwd()
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}
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}, delay)
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} else {
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if (dir) {
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this._startFwd()
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} else {
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this._startBwd()
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}
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}
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}
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_stop () {
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this._pin.fwd.set(0)
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this._pin.bwd.set(0)
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let len = (+new Date()) - this._state.frame.start
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console.log(`Frame stopped`, { ms : len })
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this._pin.micro.unwatch()
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this._state.frame.active = false
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}
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status () {
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return this._state
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}
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}
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module.exports = new Intval() |