fix bad comment
David Kebler
parent
a46e9501eb
commit
35605352bf
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@ -1,7 +1,7 @@
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{
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"name": "@uci/mcp",
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"main": "src/mcp23008-17.js",
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"version": "0.1.1",
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"version": "0.1.2",
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"description": "Classes and Helper Functions for using the MCP chip on I2C Bus",
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"scripts": {
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"test": "./node_modules/.bin/mocha --reporter list --timeout 30000",
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@ -1,267 +1,267 @@
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'use strict'
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const Device = require('@uci/i2c').Device,
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portpin = require('./port-pin'), // classes for MCP port and pins
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EventEmitter = require('events'),
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_ = require('@uci/utils'),
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aggregate = require("aggregation/es6")
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portpin = require('./port-pin'), // classes for MCP port and pins
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EventEmitter = require('events'),
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_ = require('@uci/utils'),
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aggregate = require('aggregation/es6')
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const
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Port = portpin.Port,
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pinConfigs = portpin.configs, // for export so pinConfigs can be accessed at runtime
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pause = _.pPause,
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debug = _.debug('mcp:23008-17')
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Port = portpin.Port,
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pinConfigs = portpin.configs, // for export so pinConfigs can be accessed at runtime
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pause = _.pPause,
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debug = _.debug('mcp:23008-17')
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class MCP23008 extends aggregate(Device, EventEmitter) {
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constructor(busObj, i2cAddress, opts = {}) {
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super(busObj, i2cAddress, opts)
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// opts could include options passed on to ports and pin including custom pin config, pin ids...see gpio.js
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this.chip_config = opts.chip_config // TODO allow opts.chip_config to be a byte instead of a string pointer
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this.ports = {}
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opts.portID = 'A'
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opts.pids = opts.pids ? opts.pids : opts.pidsA
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this.ports.A = new Port(opts)
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this.ports.A.state = new _.Byte(opts.stateA)
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this.ports.A.interrupt = opts.interruptA ? opts.interruptA : opts.interrupt
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} // end constructor
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constructor(busObj, i2cAddress, opts = {}) {
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super(busObj, i2cAddress, opts)
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// opts could include options passed on to ports and pin including custom pin config, pin ids...see gpio.js
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this.chip_config = opts.chip_config // TODO allow opts.chip_config to be a byte instead of a string pointer
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this.ports = {}
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opts.portID = 'A'
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opts.pids = opts.pids ? opts.pids : opts.pidsA
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this.ports.A = new Port(opts)
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this.ports.A.state = new _.Byte(opts.stateA)
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this.ports.A.interrupt = opts.interruptA ? opts.interruptA : opts.interrupt
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} // end constructor
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// helpers
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pin(id) { return this.ports.A.pin(id) } // get a reference to a particular pin's object
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// helpers
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pin(id) { return this.ports.A.pin(id) } // get a reference to a particular pin's object
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pid(address) { return this.ports.A.pid(address) } // return pin id for a given address on a port
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pid(address) { return this.ports.A.pid(address) } // return pin id for a given address on a port
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pid(num) { return this.ports.A.pins[num - 1].id }
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pid(num) { return this.ports.A.pins[num - 1].id }
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portByPin(id) {
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if (this.ports.A.pin(id)) { return 'A' }
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return false
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}
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portByPin(id) {
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if (this.ports.A.pin(id)) { return 'A' }
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return false
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}
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state(port = 'A') {
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return this.ports[port].state.value
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}
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state(port = 'A') {
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return this.ports[port].state.value
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}
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// get a handle to the ports interrupt
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inter(port = 'A') {
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return this.ports[port].interrupt
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}
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// get a handle to the ports interrupt
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inter(port = 'A') {
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return this.ports[port].interrupt
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}
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// Must call after instantiating.
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// Must call after instantiating.
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async init() {
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debug.L1(`\n=======\nInitializing ${this.id}`)
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await this.writeChipCfg(this.chip_config) // chip settings
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await this.writePinsCfg()
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// write out any initial state(s)
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for (let port in this.ports) {
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if (this.state(port)) {
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debug.L1(`writing initial port state ${port} ${this.state(port)}`)
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await this.writePort(this.state(port), 'force', port)
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}
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}
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}
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async init() {
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debug.L1(`\n=======\nInitializing ${this.id}`)
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await this.writeChipCfg(this.chip_config) // chip settings
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await this.writePinsCfg()
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// write out any initial state(s)
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for (let port in this.ports) {
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if (this.state(port)) {
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debug.L1(`writing initial port state ${port} ${this.state(port)}`)
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await this.writePort(this.state(port), 'force', port)
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}
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}
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}
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// must call after init if using interrupts
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async start() {
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debug.L1(`starting ${ this.id }`)
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for (let port in this.ports) {
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// if there are interrupts being used then start them and listeners
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if (this.inter(port)) {
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this.startInterrupt(port)
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}
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}
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}
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// must call after init if using interrupts
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async start() {
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debug.L1(`starting ${ this.id }`)
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for (let port in this.ports) {
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// if there are interrupts being used then start them and listeners
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if (this.inter(port)) {
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this.startInterrupt(port)
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}
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}
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}
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async startInterrupt(port) {
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await this.interruptReset(port)
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debug.L1(`starting interrupt on port ${ port }`)
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await this.inter(port).start()
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let chip = this // scope `this` for use in the listener below
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// bind handler to the chip so handler can read/write to chip/bank when interrupt is emitted
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debug.L3('handler', this.inter(port).handler)
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let ihandler = this.inter(port).handler.bind(this)
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// inside the listener `this` is the interrupt not the chip/bank
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this.inter(port).on('fired', async function () {
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debug.L1(`interrupt from ${this.pin_number}`)
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let data = await ihandler(port)
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debug.L2(`port interrupt event 'fired' data => ${data.bank} on port ${data.port} pin# ${data.pin} pid ${data.pid}`)
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chip.emit('fired', data) // emit up the class chain
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})
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async startInterrupt(port) {
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await this.interruptReset(port)
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debug.L1(`starting interrupt on port ${ port }`)
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await this.inter(port).start()
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let chip = this // scope `this` for use in the listener below
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// bind handler to the chip so handler can read/write to chip/bank when interrupt is emitted
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debug.L3('handler', this.inter(port).handler)
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let ihandler = this.inter(port).handler.bind(this)
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// inside the listener `this` is the interrupt not the chip/bank
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this.inter(port).on('fired', async function () {
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debug.L1(`interrupt from ${this.pin_number}`)
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let data = await ihandler(port)
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debug.L2(`port interrupt event 'fired' data => ${data.bank} on port ${data.port} pin# ${data.pin} pid ${data.pid}`)
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chip.emit('fired', data) // emit up the class chain
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})
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}
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}
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async interruptReset(port = 'A') {
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await this.read(portReg(0x08, port))
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await pause(100) // give enough time for mcp to reset its interupt
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debug.L1(`interrupt reset on ${this.id} port ${port}`)
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}
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async interruptReset(port = 'A') {
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await this.read(portReg(0x08, port))
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await pause(100) // give enough time for mcp to reset its interupt
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debug.L1(`interrupt reset on ${this.id} port ${port}`)
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}
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async interruptPin(port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port ? port : null
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port = 'A'
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}
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let result = await this.read(portReg(0x07, port))
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return format ? _.byteFormat(result, { in: 'DEC', out: format }) : result
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async interruptPin(port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port ? port : null
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port = 'A'
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}
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let result = await this.read(portReg(0x07, port))
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return format ? _.byteFormat(result, { in: 'DEC', out: format }) : result
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}
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}
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async writeChipCfg(cfg = 'default') {
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let setting = chip_config[cfg]
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let byte = _.byteFormat(setting.val, { in: setting.fmt, out: 'DEC' })
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debug.L1(`writing mcp chip config ${setting.val}`)
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await this.write(chip_config.cmd, byte)
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}
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async writeChipCfg(cfg = 'default') {
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let setting = chip_config[cfg]
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let byte = _.byteFormat(setting.val, { in: setting.fmt, out: 'DEC' })
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debug.L1(`writing mcp chip config ${setting.val}`)
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await this.write(chip_config.cmd, byte)
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}
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// pin configurations should already be set before calling
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async writePinsCfg() {
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debug.L1(`writing mcp pins config`)
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for (let port in this.ports) {
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for (let setting in registers.pin_config) {
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let reg = registers.pin_config[setting]
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// TODO 0x10 should be based on chip config
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let byte = 0
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for (let pin of this.ports[port].pins) {
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byte += pin.address * pin.cfg[setting]
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debug.L3(`port: ${ port } pin: ${pin.id} setting: ${ setting } reg: ${ reg } byte: ${ byte }`)
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}
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await this.write(portReg(reg, port), byte)
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}
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}
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debug.L1(`done writing mcp pins config`)
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} // end writePinsCfg
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// pin configurations should already be set before calling
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async writePinsCfg() {
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debug.L1('writing mcp pins config')
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for (let port in this.ports) {
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for (let setting in registers.pin_config) {
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let reg = registers.pin_config[setting]
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// TODO 0x10 should be based on chip config
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let byte = 0
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for (let pin of this.ports[port].pins) {
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byte += pin.address * pin.cfg[setting]
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debug.L3(`port: ${ port } pin: ${pin.id} setting: ${ setting } reg: ${ reg } byte: ${ byte }`)
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}
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await this.write(portReg(reg, port), byte)
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}
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}
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debug.L1('done writing mcp pins config')
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} // end writePinsCfg
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async readPort(port, opts = {}) {
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if ('AB'.indexOf(port) === -1) {
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opts = port ? port : {}
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port = 'A'
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}
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let cmd = opts.cmd ? opts.cmd : 'gpio'
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let result = await this.read(portReg(registers.pin_cmd[cmd], port))
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debug.L2('read prev ', this.ports[port].state.toFmtPrev('ARY'))
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debug.L2('read result', _.byteFormat(result, { in: 'DEC', out: 'ARY' }))
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debug.L2('read state ', this.ports[port].state.toFmt('ARY'))
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// if port pins changed without a write then update state
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if (_.bitChanges(_.byteFormat(result, { in: 'DEC', out: 'ARY' }), this.ports[port].state.toFmt('ARY'))) {
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this.ports[port].state.value = result
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}
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return opts.format ? this.ports[port].state.toFmt(opts.format) : result
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}
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async readPort(port, opts = {}) {
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if ('AB'.indexOf(port) === -1) {
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opts = port ? port : {}
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port = 'A'
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}
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let cmd = opts.cmd ? opts.cmd : 'gpio'
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let result = await this.read(portReg(registers.pin_cmd[cmd], port))
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debug.L2('read prev ', this.ports[port].state.toFmtPrev('ARY'))
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debug.L2('read result', _.byteFormat(result, { in: 'DEC', out: 'ARY' }))
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debug.L2('read state ', this.ports[port].state.toFmt('ARY'))
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// if port pins changed without a write then update state
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if (_.bitChanges(_.byteFormat(result, { in: 'DEC', out: 'ARY' }), this.ports[port].state.toFmt('ARY'))) {
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this.ports[port].state.value = result
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}
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return opts.format ? this.ports[port].state.toFmt(opts.format) : result
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}
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async readPin(pin, port, opts = {}) {
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if ('AB'.indexOf(port) === -1) {
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opts = port ? port : {}
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port = 'A'
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}
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await this.readPort(port, opts)
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TODO return just true or false not the decimal of pin - will need new version on npm
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return this.ports[port].state.bwOp(Math.pow(2, pin - 1), 'check') ? true : false
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}
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async readPin(pin, port, opts = {}) {
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if ('AB'.indexOf(port) === -1) {
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opts = port ? port : {}
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port = 'A'
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}
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await this.readPort(port, opts)
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// TODO return just true or false not the decimal of pin - will need new version on npm
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return this.ports[port].state.bwOp(Math.pow(2, pin - 1), 'check') ? true : false
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}
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async writePort(byte, op, port = 'A') {
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// byte MUST be a decimal
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debug.L2(`port:${port}, op:${op}, current pins state\n ${this.ports[port].state.toFmt('PLC') }`)
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debug.L2(`byte passed \n [${ _.byteFormat(byte, { in: 'DEC', out: 'PLC'})}]:${byte}`)
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if (op !== 'force') {
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byte = this.ports[port].state.bwOp(byte, op)
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}
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debug.L2(`byte to write\n [${ _.byteFormat(byte, { in: 'DEC', out: 'PLC' })}]:${byte}\n=======`)
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await this.write(portReg(registers.pin_cmd.gpio, port), byte)
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//update to the saved state
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this.ports[port].state.value = byte
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}
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async writePort(byte, op, port = 'A') {
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// byte MUST be a decimal
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debug.L2(`port:${port}, op:${op}, current pins state\n ${this.ports[port].state.toFmt('PLC') }`)
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debug.L2(`byte passed \n [${ _.byteFormat(byte, { in: 'DEC', out: 'PLC'})}]:${byte}`)
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if (op !== 'force') {
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byte = this.ports[port].state.bwOp(byte, op)
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}
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debug.L2(`byte to write\n [${ _.byteFormat(byte, { in: 'DEC', out: 'PLC' })}]:${byte}\n=======`)
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await this.write(portReg(registers.pin_cmd.gpio, port), byte)
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//update to the saved state
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this.ports[port].state.value = byte
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}
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async pinsOn(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'on', port)
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}
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async pinsOn(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'on', port)
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}
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async allOn(port = 'A') {
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let pins = 255
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await this.writePort(pins, 'force', port)
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}
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async allOn(port = 'A') {
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let pins = 255
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await this.writePort(pins, 'force', port)
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}
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async pinsOff(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'off', port)
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}
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async pinsOff(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'off', port)
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}
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async allOff(port = 'A') {
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let pins = 0
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await this.writePort(pins, 'force', port)
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}
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async allOff(port = 'A') {
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let pins = 0
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await this.writePort(pins, 'force', port)
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}
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async toggle(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'toggle', port)
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}
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async toggle(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'toggle', port)
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}
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async allToggle(port = 'A') {
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let pins = 255
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await this.writePort(pins, 'toggle', port)
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}
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async allToggle(port = 'A') {
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let pins = 255
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await this.writePort(pins, 'toggle', port)
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}
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async force(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'force', port)
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}
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async force(pins, port, format) {
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if ('AB'.indexOf(port) === -1) {
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format = port
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port = 'A'
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}
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if (format) { pins = _.byteFormat(pins, { in: format, out: 'DEC' }) }
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await this.writePort(pins, 'force', port)
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}
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} // end 23008
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||||
class MCP23017 extends MCP23008 {
|
||||
constructor(busObj, i2cAddress, opts = {}) {
|
||||
super(busObj, i2cAddress, opts)
|
||||
// add a second port
|
||||
opts.portID = 'B'
|
||||
opts.pids = opts.pidsB
|
||||
this.ports.B = new Port(opts)
|
||||
this.ports.B.state = new _.Byte(opts.stateB)
|
||||
this.ports.B.interrupt = opts.interruptB ? opts.interruptB : opts.interrupt
|
||||
}
|
||||
constructor(busObj, i2cAddress, opts = {}) {
|
||||
super(busObj, i2cAddress, opts)
|
||||
// add a second port
|
||||
opts.portID = 'B'
|
||||
opts.pids = opts.pidsB
|
||||
this.ports.B = new Port(opts)
|
||||
this.ports.B.state = new _.Byte(opts.stateB)
|
||||
this.ports.B.interrupt = opts.interruptB ? opts.interruptB : opts.interrupt
|
||||
}
|
||||
|
||||
pin(id, port) {
|
||||
if (!port) {
|
||||
return this.ports.A.pin(id) ? this.ports.A.pin(id) : this.ports.B.pin(id)
|
||||
}
|
||||
return this.ports[port].pin(id)
|
||||
}
|
||||
pin(id, port) {
|
||||
if (!port) {
|
||||
return this.ports.A.pin(id) ? this.ports.A.pin(id) : this.ports.B.pin(id)
|
||||
}
|
||||
return this.ports[port].pin(id)
|
||||
}
|
||||
|
||||
pid(num, port) {
|
||||
pid(num, port) {
|
||||
console.log('pin for pid',this.ports[port].pins[num - 1])
|
||||
return this.ports[port].pins[num - 1].id
|
||||
}
|
||||
return this.ports[port].pins[num - 1].id
|
||||
}
|
||||
|
||||
} // end MCP23017 Class
|
||||
|
||||
// EXPORTS
|
||||
module.exports = {
|
||||
MCP23008,
|
||||
MCP23017,
|
||||
pinConfigs
|
||||
MCP23008,
|
||||
MCP23017,
|
||||
pinConfigs
|
||||
}
|
||||
|
||||
// Local Functions and Settings=============================
|
||||
|
||||
function portReg(reg, port) {
|
||||
// TODO check chip configuartion to know what to add for port B. CUrrenly assume IOCON=1
|
||||
// index 0,1 ==== 'A','B'
|
||||
if ((port === 'B') || (port === 1)) { return reg += 0x10 } else { return reg }
|
||||
// TODO check chip configuartion to know what to add for port B. CUrrenly assume IOCON=1
|
||||
// index 0,1 ==== 'A','B'
|
||||
if ((port === 'B') || (port === 1)) { return reg += 0x10 } else { return reg }
|
||||
}
|
||||
|
||||
/* ww1.microchip.com/downloads/en/DeviceDoc/21952b.pdf
|
||||
|
|
@ -274,31 +274,31 @@ function portReg(reg, port) {
|
|||
*/
|
||||
// Chip Configuration to be used with Register See Page 18 of 23017 doc
|
||||
let chip_config = {
|
||||
// byte: ['NULL','INTPOL','ODR','HAEN','DISSLW','SEQOP','MIRROR','BANK'] // see page 18 of 23017 datasheet for 8 setting details
|
||||
cmd: 0x0A, // IOCON.BANK=0 (msb) at powerup so need to use 0x0A, if set to 1 then use
|
||||
default: {
|
||||
val: '10100010', // Split Banks port A + 0x10 = Port B,(ignored by 23008), Sequential operation disabled, active high=pulldown
|
||||
fmt: 'STR'
|
||||
},
|
||||
oneint: {
|
||||
val: '11100100', // same as default execpt int pins connected
|
||||
fmt: 'STR'
|
||||
}
|
||||
// byte: ['NULL','INTPOL','ODR','HAEN','DISSLW','SEQOP','MIRROR','BANK'] // see page 18 of 23017 datasheet for 8 setting details
|
||||
cmd: 0x0A, // IOCON.BANK=0 (msb) at powerup so need to use 0x0A, if set to 1 then use
|
||||
default: {
|
||||
val: '10100010', // Split Banks port A + 0x10 = Port B,(ignored by 23008), Sequential operation disabled, active high=pulldown
|
||||
fmt: 'STR'
|
||||
},
|
||||
oneint: {
|
||||
val: '11100100', // same as default execpt int pins connected
|
||||
fmt: 'STR'
|
||||
}
|
||||
}
|
||||
|
||||
let registers = {
|
||||
pin_config: {
|
||||
dir: 0,
|
||||
ivrt: 1,
|
||||
pullup: 6,
|
||||
intr: 2,
|
||||
usedef: 4,
|
||||
defval: 3,
|
||||
},
|
||||
pin_cmd: {
|
||||
intf: 7, // readonly
|
||||
intcap: 8, // readonly
|
||||
gpio: 9, // read/write
|
||||
olat: 10 // read only
|
||||
}
|
||||
pin_config: {
|
||||
dir: 0,
|
||||
ivrt: 1,
|
||||
pullup: 6,
|
||||
intr: 2,
|
||||
usedef: 4,
|
||||
defval: 3,
|
||||
},
|
||||
pin_cmd: {
|
||||
intf: 7, // readonly
|
||||
intcap: 8, // readonly
|
||||
gpio: 9, // read/write
|
||||
olat: 10 // read only
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue