75 lines
2.3 KiB
JavaScript
75 lines
2.3 KiB
JavaScript
// import Base from '@uci/base'
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import Base from '../../uci-base/src/base'
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import { pin, chip } from './commands'
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import logger from '../../uci-logger/src/logger'
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let log = {}
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const LOG_OPTS = {
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repo:'uci-mcp',
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npm:'@uci/mcp',
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file:'src/mcp230xx-packet.mjs',
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class:'MCP230XX',
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id:this.id,
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instance_created:new Date().getTime()
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}
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export default class MCP230XX extends Base {
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constructor(opts) {
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log = logger.child(LOG_OPTS)
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if (opts.bus) {
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if (opts.bus.host) {
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opts.bus.socket = 'bus#c>t'
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opts.bus.port = opts.bus.port || 1776
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}
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if (opts.bus.path) opts.bus.socket = 'bus#c>n'
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} else {
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opts.bus = { path : (process.env.SOCKETS_DIR || __dirname) + '/i2c-bus.sock' }
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opts.bus.socket = 'bus#c>n'
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}
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opts.nmcp = opts.nmcp || {path: (process.env.SOCKETS_DIR || __dirname) + '/mcp.sock'}
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opts.sockets = 'nmcp#s>n,tmcp#s>t,'+ opts.bus.socket
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console.log(opts)
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super(opts)
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if (!opts.address) log.fatal({opts:opts},'no i2c bus address supplied' )
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this.address = opts.address
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this.pin = pin
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this.chip = chip
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this.busSend = this.busSend.bind(this)
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}
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async init(){
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await super.init()
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let res = await this.chip.ack.bind(this)() // move this to device class
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if (!res.ack) throw `no device on this bus at address ${this.address}=0x${this.address.toString(16)}`
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res = await this.chip.cfg.bind(this)({})
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if (res.response !== '10100010') throw `could not configure mcp chip at ${this.address}=0x${this.address.toString(16)}`
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}
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// this services the reply from the bus
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reply (bus_packet) {
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this.emit(bus_packet.id, bus_packet)
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}
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async busSend(packet) {
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return new Promise( async (resolve) => {
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setTimeout(() => {resolve({error:'no response from bus in 10sec'})},10000)
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packet.id = Math.random().toString().slice(2)
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// console.log('sending to bus', packet.id)
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this.socket.bus.send(packet)
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this.on(packet.id,function(bus_reply){
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// console.log('reply emitted',bus_reply)
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this.removeAllListeners(bus_reply.id)
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delete bus_reply.id
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resolve(bus_reply)
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}) //end listener
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})
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}
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// setBusListener(packet) {
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// // this.on(packet.cmd+Math.random().toString().slice(1))
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// }
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} // end of MCP230XX Class
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