removed old non-packet reversion and rename packet version to bus.js

clean up examples
update packages
master
David Kebler 2018-05-27 11:41:33 -07:00
parent 10acb39693
commit f2db2ca87c
12 changed files with 203 additions and 207 deletions

2
.gitignore vendored
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/node_modules/ /node_modules/
/coverage/
/syncd/
*.lock *.lock

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test/ test/
*.test.js *.test.js
testing/ testing/
examples/
*.lock

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/* /*
* Basic i2c bus listening at 1776 (by default when tcp:true) and also named pipe * Basic i2c bus listening at 1776 (by default when tcp:true) and also named pipe 'i2c-bus' by default in default /tmp directory
* *
*/ */
import Bus from '../src/bus-packet' import Bus from '../src/bus'
// can use SOCKETS_DIR='' env variable to get a 'i2c-bus.sock' in the given environment variable path // can use SOCKETS_DIR='' env variable to get a 'i2c-bus.sock' in a particular directory
// SOCKETS_DIR=/opt/sockets node -r @std/esm i2cbus // e.g. SOCKETS_DIR=/opt/sockets node -r @std/esm i2cbus
; ;
(async () => { (async () => {

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/* /*
* i2c bus unix socket and client in one for demo * i2c bus unix socket and client in one for demo
* *

51
examples/tcp-relay.js Normal file
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/*
* A tcp customer/client to talk with the i2c bus and scan the bus for devices
*
*/
const HOST = (process.env.BUS_HOST || 'sbc')
const ADDRESS = 39
import Base from '@uci/base'
const delay = time => new Promise(res=>setTimeout(()=>res(),time))
;
(async () => {
let relays = new Base({id:'tcp-i2c-client', sockets:'tc#c>t', tc:{host:HOST, port:1776}})
relays.reply = async function (packet) {
console.log(`response from relays for ${packet.cmd_sent}:`,packet.args, `was ${packet.response}`)
}
await relays.init()
console.log('=============sending============')
let packet = {cmd:'read', args:{address:ADDRESS ,cmd: 0} }
console.dir(packet)
await relays.send(packet)
packet = {cmd:'write', args:{address:ADDRESS,cmd: 0, byte:0} }
console.dir(packet)
await relays.send(packet)
packet = {cmd:'read', args:{address:ADDRESS ,cmd:0} }
console.dir(packet)
await relays.send(packet)
packet = {cmd:'write', args:{address:ADDRESS,cmd: 9, byte:255} }
console.dir(packet)
await relays.send(packet)
packet = {cmd:'read', args:{address:ADDRESS ,cmd:9} }
console.dir(packet)
await relays.send(packet)
await delay(1000)
packet = {cmd:'write', args:{address:ADDRESS,cmd: 9, byte:0} }
console.dir(packet)
await relays.send(packet)
packet = {cmd:'read', args:{address:ADDRESS ,cmd:9} }
console.dir(packet)
await relays.send(packet)
await delay(1000)
process.kill(process.pid, 'SIGTERM')
})().catch(err => {
console.error('FATAL: UNABLE TO START SYSTEM!\n',err)
})

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@ -3,12 +3,12 @@
* *
*/ */
import Base from '@uci/base' import Base from '@uci/base'
// const HOST = '' const HOST = (process.env.BUS_HOST || 'sbc')
const delay = time => new Promise(res=>setTimeout(()=>res(),time)) const delay = time => new Promise(res=>setTimeout(()=>res(),time))
; ;
(async () => { (async () => {
let scanner = new Base({id:'tcp-i2c-client', sockets:'tc#c>t', tc:{port: 1776}}) let scanner = new Base({id:'tcp-i2c-client', sockets:'tc#c>t', tc:{host:HOST,port: 1776}})
scanner.reply = function (packet) { scanner.reply = function (packet) {
let addresses = packet.response.map(device => { let addresses = packet.response.map(device => {

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{ {
"name": "@uci/i2c-bus", "name": "@uci/i2c-bus",
"version": "0.1.5", "version": "0.1.6",
"description": "I2c Bus Classes for Communication to I2C bus via socket or direct call", "description": "I2c Bus Classes for Communication to I2C bus via socket or direct call",
"main": "src/bus-packet", "main": "src/bus",
"scripts": { "scripts": {
"irelay": "node --require esm examples/ipc-relay", "nrelay": "node --require esm examples/np-relay",
"iscan": "node --require esm examples/ipc-scan || true", "trelay": "node --require esm examples/tcp-relay",
"pcan": "node --require esm examples/np-scan || true",
"tscan": "node --require esm examples/tcp-scan || true", "tscan": "node --require esm examples/tcp-scan || true",
"bus": "node --require esm examples/bus", "bus": "node --require esm examples/bus",
"busl": "DEBUG=true node --require esm examples/bus", "busd": "DEBUG=true node --require esm examples/bus",
"test": "mocha -r esm test/*.test.js", "busl": "UCI_LOG=true node --require esm examples/bus"
"testw": "mocha -r esm test/*.test.js --watch --recurse",
"testci": "istanbul cover ./node_modules/.bin/_mocha test/ --report lcovonly -- -R spec --recursive && codecov || true"
}, },
"author": "David Kebler", "author": "David Kebler",
"license": "MIT", "license": "MIT",
@ -30,21 +29,15 @@
}, },
"homepage": "https://github.com/uCOMmandIt/i2c#readme", "homepage": "https://github.com/uCOMmandIt/i2c#readme",
"optionalDependencies": { "optionalDependencies": {
"i2c-bus": "^1.x" "i2c-bus": "^3.x"
}, },
"dependencies": { "dependencies": {
"@uci/base": "^0.1.0", "@uci/base": "^0.1.6",
"@uci/logger": "^0.0.2", "@uci/logger": "0.0.3",
"better-try-catch": "^0.6.2", "better-try-catch": "^0.6.2",
"pify": "^3.0.0" "pify": "^3.0.0"
}, },
"devDependencies": { "devDependencies": {
"chai": "^3.5.0", "esm": "^3.0.38"
"chai-as-promised": "^6.0.0",
"codecov": "^1.0.1",
"esm": "^3.0.21",
"istanbul": "^0.4.5",
"mocha": "^3.2.0",
"nodemon": "^1.14.12"
} }
} }

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# uCOMmandIt I2C Bus and Device Class Library # uCOMmandIt (UCI) - I2C Bus Class
## Raspberry Pi ONLY!
<!-- find and replace the package name to match --> <!-- find and replace the package name to match -->
[![Build Status](https://img.shields.io/travis/uCOMmandIt/uci-pkg-template.svg?branch=master)](https://travis-ci.org/uCOMmandIt/uci-pkg-template) [![Build Status](https://img.shields.io/travis/uCOMmandIt/uci-i2c-bus.svg?branch=master)](https://travis-ci.org/uCOMmandIt/uci-i2c-bus)
[![Inline docs](http://inch-ci.org/github/uCOMmandIt/uci-pkg-template.svg?branch=master)](http://inch-ci.org/github/uCOMmandIt/uci-pkg-template) [![Inline docs](http://inch-ci.org/github/uCOMmandIt/uci-i2c-bus.svg?branch=master)](http://inch-ci.org/github/uCOMmandIt/uci-i2c-bus)
[![Dependencies](https://img.shields.io/david/uCOMmandIt/uci-pkg-template.svg)](https://david-dm.org/uCOMmandIt/uci-pkg-template) [![Dependencies](https://img.shields.io/david/uCOMmandIt/uci-i2c-bus.svg)](https://david-dm.org/uCOMmandIt/uci-i2c-bus)
[![devDependencies](https://img.shields.io/david/dev/uCOMmandIt/uci-pkg-template.svg)](https://david-dm.org/uCOMmandIt/uci-pkg-template?type=dev) [![devDependencies](https://img.shields.io/david/dev/uCOMmandIt/uci-i2c-bus.svg)](https://david-dm.org/uCOMmandIt/uci-i2c-bus?type=dev)
[![codecov](https://img.shields.io/codecov/c/github/uCOMmandIt/uci-pkg-template/master.svg)](https://codecov.io/gh/uCOMmandIt/uci-pkg-template) [![codecov](https://img.shields.io/codecov/c/github/uCOMmandIt/uci-i2c-bus/master.svg)](https://codecov.io/gh/uCOMmandIt/uci-i2c-bus)
A promise wrapper for an I2C arm C library methods and a Device Class that is the base class for an I2C device This is an Raspberry Pi only I2C bus socket packet listener and I2C bus master processor. See /examples/bus.js for how to implement an instance. The rest of the examples are client examples that will talk to a running i2c-bus instance
Here is a simple script to get an instance going (on an RPI only)
```
/*
* Raspberry Pi (only) I2C-Bus listener
* named pipe socket 'i2c-bus' is always created by default /tmp directory unless
* env variable SOCKETS_DIR='' is used to create a 'i2c-bus.sock' in a particular directory
* e.g. command >SOCKETS_DIR=/opt/sockets node -r esm i2cbus
* add TCP listener with tcp:true. Will listen on port 1776 by default
*/
import Bus from '@uci/i2c-bus'
;
(async () => {
let i2cbus = new Bus({id:'i2c-bus',tcp:true})
await i2cbus.init()
})().catch(err => {
console.error('FATAL: UNABLE TO START SYSTEM!\n',err)
})
```

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import i2c from 'i2c-bus'
import pify from 'pify'
import btc from 'better-try-catch'
import Base from '@uci/base'
import logger from '@uci/logger'
let log = {}
export default class Bus extends Base {
constructor(opts) {
log = logger({name:'i2c-bus',id:opts.id,file:'src/bus-packet.js',class:'Bus'})
if (opts.path) opts.ns ={path:opts.path}
if(!opts.ns) opts.ns = {path:'i2c-bus'}
opts.sockets = (opts.sockets ? (opts.sockets+',') : '') + 'ns#s>n'
if(opts.tcp) {
if (typeof opts.tcp==='number') opts.ts ={port:opts.tcp}
else opts.ts ={port:1776}
opts.sockets = (opts.sockets ? (opts.sockets+',') : '') + 'ts#s>t'
}
super(opts)
log.info({opts:opts},'created bus with these opts')
console.log({opts:opts},'\n created bus with these opts')
this.busnum = opts.busnum || 1
this.i2cbus = i2c.open(this.busnum, () => {})
this.bus = bus_funcs
// this.init = this.init.bind(this)
}
async init(){
await super.init()
}
// TODO see if default processing of base can handle this now
async _packetProcess (sname,packet){
// console.log('incoming packet', sname, packet)
if (!packet.cmd) return {error: 'no cmd: key in packet', packet: packet }
if (this.bus[packet.cmd]) {
let checked = validateArgs(packet) // handle with before hook
if (checked.error) return checked.error
let [err,res] = await btc(this.bus[packet.cmd].bind(this))(packet.args)
if (err) return {error: err.msg, packet:packet}
packet.response = res
packet.cmd = 'reply'
return packet
} else return {error: 'no i2c bus function available for packet command', packet: packet }
}
} // end of Bus Packet Class
const validateArgs = function (packet) {
let missing = []
const ne = arg => { if (packet.args[arg]===undefined) missing.push(arg) }
// console.log('validate packet',packet)
if (packet.cmd==='scan' || packet.cmd ==='close') return {}
ne('address')
switch (packet.cmd)
{
case 'readRaw':
case 'writeRaw':
ne('length')
ne('buffer')
break
case 'read':
case 'read2':
case 'write':
case 'write2':
ne('cmd')
}
switch (packet.cmd)
{
case 'write':
case 'write2':
case 'send':
ne('byte')
}
if (missing.length > 0) {
return {error: `following bus arguments are missing ${missing}`, packet: packet }
}
return {}
}
const bus_funcs = {
scan: function () { return pify(this.i2cbus.scan).bind(this.i2cbus)() },
close: function () { return pify(this.i2cbus.close).bind(this.i2cbus)() },
readRaw: function (args) {
return pify(this.i2cbus.i2cRead).bind(this.i2cbus)(args.address, args.length, args.buffer)
},
writeRaw: function (args) {
return pify(this.i2cbus.i2cWrite).bind(this.i2cbus)(args.address, args.length, args.buffer)
},
read: function (args) {
// console.log('read: address, cmd', address, cmd)
return pify(this.i2cbus.readByte).bind(this.i2cbus)(args.address, args.cmd)
},
write: function (args) {
// console.log('write: address, cmd, byte', args.address, args.cmd, args.byte)
return pify(this.i2cbus.writeByte.bind(this.i2cbus))(args.address, args.cmd, args.byte)
},
read2: function (args) {
return pify(this.i2cbus.readWord.bind(this.i2cbus))(args.address, args.cmd)
},
write2: function (args) {
return pify(this.i2cbus.writeWord.bind(this.i2cbus))(args.address, args.cmd, args.byte)
},
receive: function (args) {
// console.log('receivebyte', address)
return pify(this.i2cbus.receiveByte.bind(this.i2cbus))(args.address)
},
send: function (args) {
// console.log('sendbyte', address,byte)
return pify(this.i2cbus.sendByte.bind(this.i2cbus))(args.address, args.byte)
}
} //end i2c functions

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import i2c from 'i2c-bus' import i2c from 'i2c-bus'
import pify from 'pify' import pify from 'pify'
import btc from 'better-try-catch'
import Base from '@uci/base'
export default class Bus { import logger from '@uci/logger'
constructor(busnum=1) { let log = {}
this.busnum = busnum
this.bus = i2c.open(this.busnum, () => {}) export default class Bus extends Base {
constructor(opts) {
log = logger({name:'i2c-bus',id:opts.id,file:'src/bus.js',class:'Bus'})
if (opts.path) opts.ns ={path:opts.path}
if(!opts.ns) opts.ns = {path:'i2c-bus'}
opts.sockets = (opts.sockets ? (opts.sockets+',') : '') + 'ns#s>n'
if(opts.tcp) {
if (typeof opts.tcp==='number') opts.ts ={port:opts.tcp}
else opts.ts = {port:1776}
opts.sockets = (opts.sockets ? (opts.sockets+',') : '') + 'ts#s>t'
}
super(opts)
log.info({opts:opts},'created bus with these opts')
console.log({opts:opts},'\n created bus with these opts')
this.busnum = opts.busnum || 1
this.i2cbus = i2c.open(this.busnum, () => {})
this.bus = bus_funcs
// this.init = this.init.bind(this)
} }
// see https://github.com/fivdi/i2c-bus#busi2cfuncscb for list of functions that can be promisified async init(){
await super.init()
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) { // TODO see if default processing of base can handle this now
return pify(this.bus.i2cWrite).bind(this.bus)(address, length, buffer) async _packetProcess (sname,packet){
// console.log('incoming packet', sname, packet)
if (!packet.cmd) return {error: 'no cmd: key in packet', packet: packet }
if (this.bus[packet.cmd]) {
let checked = validateArgs(packet) // handle with before hook
if (checked.error) return checked.error
let [err,res] = await btc(this.bus[packet.cmd].bind(this))(packet.args)
if (err) return {error: err.msg, packet:packet}
packet.response = res
packet.cmd = 'reply'
return packet
} else return {error: 'no i2c bus function available for packet command', packet: packet }
} }
read(address, cmd) { } // end of Bus Packet Class
const validateArgs = function (packet) {
let missing = []
const ne = arg => { if (packet.args[arg]===undefined) missing.push(arg) }
// console.log('validate packet',packet)
if (packet.cmd==='scan' || packet.cmd ==='close') return {}
ne('address')
switch (packet.cmd)
{
case 'readRaw':
case 'writeRaw':
ne('length')
ne('buffer')
break
case 'read':
case 'read2':
case 'write':
case 'write2':
ne('cmd')
}
switch (packet.cmd)
{
case 'write':
case 'write2':
case 'send':
ne('byte')
}
if (missing.length > 0) {
return {error: `following bus arguments are missing ${missing}`, packet: packet }
}
return {}
}
const bus_funcs = {
scan: function () { return pify(this.i2cbus.scan).bind(this.i2cbus)() },
close: function () { return pify(this.i2cbus.close).bind(this.i2cbus)() },
readRaw: function (args) {
return pify(this.i2cbus.i2cRead).bind(this.i2cbus)(args.address, args.length, args.buffer)
},
writeRaw: function (args) {
return pify(this.i2cbus.i2cWrite).bind(this.i2cbus)(args.address, args.length, args.buffer)
},
read: function (args) {
// console.log('read: address, cmd', address, cmd) // console.log('read: address, cmd', address, cmd)
return pify(this.bus.readByte).bind(this.bus)(address, cmd) return pify(this.i2cbus.readByte).bind(this.i2cbus)(args.address, args.cmd)
} },
write: function (args) {
write(address, cmd, byte) { // console.log('write: address, cmd, byte', args.address, args.cmd, args.byte)
// console.log('write: address, cmd, byte', address, cmd, byte) return pify(this.i2cbus.writeByte.bind(this.i2cbus))(args.address, args.cmd, args.byte)
return pify(this.bus.writeByte.bind(this.bus))(address, cmd, byte) },
} read2: function (args) {
return pify(this.i2cbus.readWord.bind(this.i2cbus))(args.address, args.cmd)
read2(address, cmd) { },
return pify(this.bus.readWord.bind(this.bus))(address, cmd) write2: function (args) {
} return pify(this.i2cbus.writeWord.bind(this.i2cbus))(args.address, args.cmd, args.byte)
},
write2(address, cmd, bytes) { receive: function (args) {
return pify(this.bus.writeWord.bind(this.bus))(address, cmd, bytes)
}
receive(address) {
// console.log('receivebyte', address) // console.log('receivebyte', address)
return pify(this.bus.receiveByte.bind(this.bus))(address) return pify(this.i2cbus.receiveByte.bind(this.i2cbus))(args.address)
} },
send: function (args) {
send(address, byte) {
// console.log('sendbyte', address,byte) // console.log('sendbyte', address,byte)
return pify(this.bus.sendByte.bind(this.bus))(address, byte) return pify(this.i2cbus.sendByte.bind(this.i2cbus))(args.address, args.byte)
} }
} //end i2c functions
} // end of Bus Class

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import Bus from '../src/bus'
import chai from 'chai'
import chaiAsPromised from 'chai-as-promised'
chai.use(chaiAsPromised)
const expect = chai.expect
let bus = new Bus()
const addresses = [0x25, 0x26, 0x27]
// const addresses = []
describe('Bus Class - ', function () {
it('Can scan the bus for devices', function () {
return expect(bus.scan().catch(err => console.log('an error', err))).to.eventually.deep.equal(addresses)
})
})