uci-mcp/src/mcp230xxi.js

import MCP230XX from './mcp230xx'
import { byteFormat } from '@uci/utils/src/byte'

import logger from '@uci/logger'
let log = {}

// if opts.iport not set then will be generated based on pin number

export default class MCP230XXi extends MCP230XX {
  constructor(pins,opts) {
    if (typeof opts.iport ==='number' || opts.ipath) {
      if (typeof opts.iport ==='number') {
        opts.sockets =  (opts.sockets ? (opts.sockets + ',') : '') + 'inter#c>t'
        opts.inter = {port:opts.iport}
        opts.inter.host = opts.ihost || opts.host
      }
      if (opts.ipath) {
        opts.inter = { path:  opts.ipath || 'interrupt'}
        opts.sockets = (opts.sockets ? (opts.sockets + ',') : '') + 'inter#c>n'
      }
    }
    else {
      pins.forEach( (pin,index) => {
        let ipin = 'i'+pin
        opts[ipin] = opts[pin] || {}
        if (index===1) opts[ipin].mport = opts[ipin].mort || 'B'
        delete(opts[pin])
        if (opts[ipin].port || opts.iport !=='number')  {
          opts[ipin].port = opts[ipin].port || opts.iport
          if (typeof opts[ipin].port !=='number') opts[ipin].port = 9000 + pin
          opts[ipin].host = opts[ipin].host || opts.ihost || opts.host
          opts.sockets =  (opts.sockets ? (opts.sockets + ',') : '') + ipin +'#c>t'
        }
        // either on the same host as bus and interrupt or not - no need for both
        else {
          opts[pin].path = opts[pin].path || opts.ipath
          if(!opts[pin].path) Object.assign(opts[pin],{path:'interrupt:'+pin})
          opts.sockets = (opts.sockets ? (opts.sockets + ',') : '') + pin+'#c>n'
        }
      })
    }
    super(opts)
    log = logger({file:'src/mcp230xxi.js',class:'MCP230XXi',name:'mcp',id:this.id})
    log.info({opts:opts},'mcp interrupt options after calling super() on base')
    pins.forEach(pin => {
      this[pin] = opts['i'+pin] || {}
    })
    this.pins = pins
    Object.assign(this.commands.pin, this.bindFuncs(ipincommands)) // add interrupt pin commands to base set in "command.js"
    this.addNamespace('commands','c')
    this._interruptProcess = null
    this.ready = false
    log.info({opts:opts, pins:pins}, 'options for mcp interrupt processor')

  }

  async init(){
    await super.init()
    this.pins.forEach(async pin => {
      let cfg = {port:this[pin].mport||'A',pins:this[pin].pins||'all', cfg:this[pin].type ||'toggle_switch'}
      await this.pin.cfg(cfg)
      log.info('resetting mcp port for corresponding gpio pin')
      await this.pin.interrupt.reset(this[pin].mport)
      this.ready=true
    })

    this.on('interrupt', function (details) {
      details.id = this.id
      if (!this._interruptProcess) {
        console.log('----default interrupt processor for mcp instance----')
        console.log(this.id)
        console.dir(details)
      } else this._interruptProcess(details)
    })

  }

  interruptProcessor(func) {this._interruptProcess = func}

} // end of MCP230XX Class

// commands to be added to pin command functions
const ipincommands= { interrupt: {
  reset: async function (port) {
    log.info(`resetting interrupt for port ${port || 'A'},${this.id}`)
    return await this.bus.read(port!=='B' ? 0x08 : 0x18)  // 0x08 is intcap interrupt capture register
  },
  // given a gpio interrupt then push a packet with cmd: 'pin.interrupt.find' and pin: the gpio pin number
  find: async function (inter) { // inter is a hash packet
    if(this.ready){ // protects tripped interrupt before it's fully initialized and reset
      log.info({packet:inter},'finding mcp pin which caused interrupt')
      let packet = {pins:'all',reg:'intf'}
      packet.port = inter.port || this[inter.pin].mport || 'A'
      let res = await this.pin.status(packet)
      log.info('found pin now resetting mcp port interrupt')
      await this.pin.interrupt.reset(packet.port)
      if (!res.status) return {error:'no pin associated with interrupt'}
      let pin = byteFormat(res.status.port, { in: 'ARY', out: 'PLC' })
      res.pin = pin[0]
      packet.pins = pin[0]
      packet.reg = null
      res.state = (await this.pin.status(packet)).status.pins[0][1]
      res.port = packet.port
      res.count = inter.count
      res.inter = inter.pin
      delete res.status
      this.emit('interrupt',res)
      return res
    }
  }
}
}