uci-mcp/src/mcp230xx-packet.mjs

// import Base from '@uci/base'
import Base from '../../uci-base/src/base'
import { pin, chip } from './commands'

import logger from '../../uci-logger/src/logger'
let log = {}
const LOG_OPTS = {
  repo:'uci-mcp',
  npm:'@uci/mcp',
  file:'src/mcp230xx-packet.mjs',
  class:'MCP230XX',
  id:this.id,
  instance_created:new Date().getTime()
}

export default class MCP230XX extends Base {
  constructor(opts) {
    log = logger.child(LOG_OPTS)
    if (opts.bus) {
      if (opts.bus.host) {
        opts.bus.socket = 'bus#c>t'
        opts.bus.port = opts.bus.port || 1776
      }
      if (opts.bus.path) opts.bus.socket = 'bus#c>n'
    } else {
      opts.bus = { path :  (process.env.SOCKETS_DIR || __dirname)  + '/i2c-bus.sock' }
      opts.bus.socket = 'bus#c>n'
    }
    opts.nmcp = opts.nmcp || {path: (process.env.SOCKETS_DIR || __dirname)  + '/mcp.sock'}
    opts.sockets = 'nmcp#s>n,tmcp#s>t,'+ opts.bus.socket
    console.log(opts)
    super(opts)
    if (!opts.address) log.fatal({opts:opts},'no i2c bus address supplied' )
    this.address = opts.address
    this.pin = pin
    this.chip = chip
    this.busSend = this.busSend.bind(this)

  }

  async init(){
    await super.init()
  }


  // this services the reply from the bus
  reply (bus_packet) {
    this.emit(bus_packet.id, bus_packet)
  }

  async busSend(packet) {
    return new Promise( async (resolve) => {
      setTimeout(() => {resolve({error:'no response from bus in 10sec'})},10000)
      packet.id = Math.random().toString().slice(2)
      // console.log('sending to bus', packet.id)
      this.socket.bus.send(packet)
      this.on(packet.id,function(bus_reply){
        // console.log('reply emitted',bus_reply)
        this.removeAllListeners(bus_reply.id)
        delete bus_reply.id
        resolve(bus_reply)
      }) //end listener
    })
  }

  // setBusListener(packet) {
  //   // this.on(packet.cmd+Math.random().toString().slice(1))
  // }

} // end of MCP230XX Class