added packet version of i2c-device - working but fully untested
David Kebler
parent
c737a29368
commit
b6ef63e6bb
61
src/bus.js
61
src/bus.js
|
|
@ -1,61 +0,0 @@
|
||||||
// Solely a promise wrapper module for the basic async functions of the fivdi/i2c-bus javascript bindings C API
|
|
||||||
// https://github.com/fivdi/i2c-bus
|
|
||||||
|
|
||||||
'use strict'
|
|
||||||
|
|
||||||
const i2c = require('i2c-bus'),
|
|
||||||
pify = require('pify')
|
|
||||||
|
|
||||||
class Bus {
|
|
||||||
constructor(busnum=1) {
|
|
||||||
this.busnum = busnum
|
|
||||||
this.bus = i2c.open(this.busnum, () => {})
|
|
||||||
}
|
|
||||||
|
|
||||||
// see https://github.com/fivdi/i2c-bus#busi2cfuncscb for list of functions that can be promisified
|
|
||||||
|
|
||||||
scan() { return pify(this.bus.scan).bind(this.bus)() }
|
|
||||||
close() { return pify(this.bus.close).bind(this.bus)() }
|
|
||||||
|
|
||||||
readRaw(address, length, buffer) {
|
|
||||||
return pify(this.bus.i2cRead).bind(this.bus)(address, length, buffer)
|
|
||||||
}
|
|
||||||
|
|
||||||
writeRaw(address, length, buffer) {
|
|
||||||
return pify(this.bus.i2cWrite).bind(this.bus)(address, length, buffer)
|
|
||||||
}
|
|
||||||
|
|
||||||
read(address, cmd) {
|
|
||||||
// console.log('read: address, cmd', address, cmd)
|
|
||||||
return pify(this.bus.readByte).bind(this.bus)(address, cmd)
|
|
||||||
}
|
|
||||||
|
|
||||||
write(address, cmd, byte) {
|
|
||||||
// console.log('write: address, cmd, byte', address, cmd, byte)
|
|
||||||
return pify(this.bus.writeByte.bind(this.bus))(address, cmd, byte)
|
|
||||||
}
|
|
||||||
|
|
||||||
read2(address, cmd) {
|
|
||||||
return pify(this.bus.readWord.bind(this.bus))(address, cmd)
|
|
||||||
}
|
|
||||||
|
|
||||||
write2(address, cmd, bytes) {
|
|
||||||
return pify(this.bus.writeWord.bind(this.bus))(address, cmd, bytes)
|
|
||||||
}
|
|
||||||
|
|
||||||
receive(address) {
|
|
||||||
// console.log('receivebyte', address)
|
|
||||||
return pify(this.bus.receiveByte.bind(this.bus))(address)
|
|
||||||
}
|
|
||||||
|
|
||||||
send(address, byte) {
|
|
||||||
// console.log('sendbyte', address,byte)
|
|
||||||
return pify(this.bus.sendByte.bind(this.bus))(address, byte)
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
} // end of Bus Class
|
|
||||||
|
|
||||||
module.exports = {
|
|
||||||
Bus
|
|
||||||
}
|
|
||||||
|
|
@ -0,0 +1,124 @@
|
||||||
|
// import Base from '@uci/base'
|
||||||
|
import Base from '../../uci-base/src/base'
|
||||||
|
|
||||||
|
import logger from '../../uci-logger/src/logger'
|
||||||
|
let log = {}
|
||||||
|
const LOG_OPTS = (id) => {
|
||||||
|
return {
|
||||||
|
repo:'uci-i2c-device',
|
||||||
|
npm:'@uci/i2c-device',
|
||||||
|
file:'src/device-packet.mjs',
|
||||||
|
class:'Device',
|
||||||
|
id:id,
|
||||||
|
instance_created:new Date().getTime()
|
||||||
|
}}
|
||||||
|
|
||||||
|
export default class Device extends Base {
|
||||||
|
constructor(opts) {
|
||||||
|
opts.bus.name = opts.bus.name || 'bus' //optional bus socket name
|
||||||
|
opts.sockets = opts.sockets ||''
|
||||||
|
// either device process instance runs on same host (use named pipe) or not (the host of bus must be given)
|
||||||
|
if (opts[opts.bus.name]) {
|
||||||
|
if (opts[opts.bus.name].host) {
|
||||||
|
opts.sockets = opts.sockets + opts.bus.name+'#c>t'
|
||||||
|
opts[opts.bus.name].port = opts[opts.bus.name].port || 1776
|
||||||
|
}
|
||||||
|
if (opts[opts.bus.name].path) opts.sockets = opts.bus.name+'#c>n'
|
||||||
|
} else {
|
||||||
|
opts[opts.bus.name] = { path : (process.env.SOCKETS_DIR || __dirname) + '/i2c-bus.sock' }
|
||||||
|
opts.sockets = opts.bus.name+'#c>t'
|
||||||
|
}
|
||||||
|
console.log(opts)
|
||||||
|
super(opts)
|
||||||
|
log = logger.child(LOG_OPTS(this.id))
|
||||||
|
if (!opts.address) log.fatal({opts:opts},'no i2c bus address supplied' )
|
||||||
|
this.address = opts.address
|
||||||
|
this._bus_name = opts.bus.name
|
||||||
|
this._channel = opts.channel // if using TAC9546A channel number on which device is attached
|
||||||
|
this.bus = device_funcs
|
||||||
|
for(const func in this.bus) { // autobind
|
||||||
|
this.bus[func] = this.bus[func].bind(this)
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
async init(){
|
||||||
|
await super.init()
|
||||||
|
let res = await this.bus.ack() // move this to device class
|
||||||
|
let socket = this.socket[this._bus_name].opts
|
||||||
|
let connection = socket.path || socket.host + ':' + socket.port
|
||||||
|
if (!res.ack) throw `no device operational on bus '${socket.id}' (${connection}) at address ${this.address}=0x${this.address.toString(16)}`
|
||||||
|
return res
|
||||||
|
}
|
||||||
|
|
||||||
|
async _setChannel() {
|
||||||
|
// TODO convert to package - uci-mux
|
||||||
|
// console.log('before set',this.address,this.id,this._channel, await this.socket.bus.send(getState)
|
||||||
|
// if (this._channel) {
|
||||||
|
// if (!await this.socket.bus.send(address) { return Promise.reject('Channel set but no mux on bus')}
|
||||||
|
// return await this.socket.bus.send(set(this._channel)
|
||||||
|
// }
|
||||||
|
return Promise.resolve() // no channel for device either no mux or device is attached to mux bypass
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
} // end of MCP230XX Class
|
||||||
|
|
||||||
|
|
||||||
|
const device_funcs = {
|
||||||
|
|
||||||
|
ack: async function (){
|
||||||
|
// TODO if mux channel used check it as well
|
||||||
|
let bus = await this.send(this._bus_name,{ cmd:'scan'})
|
||||||
|
if (bus.error) return bus
|
||||||
|
let res = { cmd:'reply', ack: false, address:this.address, scan:bus.response}
|
||||||
|
if (bus.response.indexOf(this.address) !== -1) res.ack = true
|
||||||
|
return res
|
||||||
|
},
|
||||||
|
|
||||||
|
receive: async function() {
|
||||||
|
await this._setChannel()
|
||||||
|
return await this.send(this._bus_name, { cmd:'receive', args: {address:this.address}})
|
||||||
|
},
|
||||||
|
|
||||||
|
send: async function(byte) {
|
||||||
|
await this._setChannel()
|
||||||
|
return await this.send(this._bus_name, { cmd:'send', args: {address:this.address, byte:byte }})
|
||||||
|
},
|
||||||
|
|
||||||
|
// for devices needing a buffer/stream
|
||||||
|
readRaw: async function (length, buffer) {
|
||||||
|
await this._setChannel()
|
||||||
|
return await this.send(this._bus_name, { cmd:'readRaw', args: {address:this.address, length:length, buffer:buffer }})
|
||||||
|
},
|
||||||
|
|
||||||
|
writeRaw: async function (length, buffer) {
|
||||||
|
await this._setChannel()
|
||||||
|
return await this.send(this._bus_name, { cmd:'writeRaw', args: {address:this.address, length:length, buffer:buffer }})
|
||||||
|
},
|
||||||
|
|
||||||
|
// both cmd and byte should be a single byte as a decimal or hex
|
||||||
|
read: async function (cmd) {
|
||||||
|
await this._setChannel()
|
||||||
|
// console.log('after set before read',this.address,this.id,this._channel,await this.socket.bus.send(getState)
|
||||||
|
return await this.send(this._bus_name, { cmd:'read', args: {address:this.address, cmd:cmd }})
|
||||||
|
},
|
||||||
|
|
||||||
|
write: async function (cmd, byte) {
|
||||||
|
await this._setChannel()
|
||||||
|
// console.log('after set, before write',this.address,this.id,this._channel,await this.socket.bus.send(getState)
|
||||||
|
return await this.send(this._bus_name, { cmd:'write', args: {address:this.address, cmd:cmd, byte:byte }})
|
||||||
|
},
|
||||||
|
|
||||||
|
// for I2C devices that use a word length packackage
|
||||||
|
read2: async function (cmd) {
|
||||||
|
await this._setChannel()
|
||||||
|
return await this.send(this._bus_name, { cmd:'read2', args: {address:this.address, cmd:cmd }})
|
||||||
|
},
|
||||||
|
|
||||||
|
write2: async function (cmd, bytes) {
|
||||||
|
await this._setChannel()
|
||||||
|
return await this.send(this._bus_name, { cmd:'write2', args: {address:this.address, cmd:cmd, byte:bytes }})
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue