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0.1.27 reworked mcp interrupt class to be more robust resetting the interrupt 

added a reset command to allow other processes to trigger an mcp port interrupt reset
master
David Kebler 2019-04-11 21:15:26 -07:00
parent d28d05b2aa
commit ea9a04f6dc
3 changed files with 135 additions and 104 deletions
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2
package.json
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@ -1,7 +1,7 @@
{ {
"name": "@uci/mcp", "name": "@uci/mcp",
"main": "src", "main": "src",
"version": "0.1.26", "version": "0.1.27",
"description": "Classes and Helper Functions for using the MCP chip on I2C Bus", "description": "Classes and Helper Functions for using the MCP chip on I2C Bus",
"scripts": { "scripts": {
"relays": "node -r esm examples/relays", "relays": "node -r esm examples/relays",

12
src/config.js
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@ -25,12 +25,12 @@ export const CHIP = {
export const PIN = { export const PIN = {
setting: { // these are the mcp registers = command for each setting setting: { // these are the mcp registers = command for each setting
dir: 0, dir: 0, // IODIR 0=output 1=input
ivrt: 1, ivrt: 1, // IPOL will report the opposite state if set
pullup: 6, intr: 2, //GPITEN 1= pin will throw interrupt (following registers are for interrupt)
intr: 2, pullup: 6, // GPPU 1=internal pullup 0=none
usedef: 4, usedef: 4, // INTCON - 0= interrupt on any change, 1= interrupt on change of value from defval
defval: 3, defval: 3, // DEFVAL default value for interrupt comparison - usedef must be set
}, },
cfgset:{ cfgset:{
output: { output: {

187
src/mcp230xxi.js
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@ -14,44 +14,48 @@ log = logger({
class MCP230XXi extends MCP230XX { class MCP230XXi extends MCP230XX {
constructor(pins, options={}) { constructor(pins, options={}) {
if (!Array.isArray(pins)) { options = pins; pins = options.interrupt.pins} // if pins sent via .interrupt.pins if (!Array.isArray(pins)) { options = pins; pins = options.interrupt.pins} // if pins sent via .interrupt.pins
let opts = Object.assign({},options) // don't allow passed options to mutate let opts = Object.assign({},options) // don't allow passed options to mutate
if (opts.interrupt) delete opts.interrupt.pins // if .interrupt was passed then .pins must be removed if (opts.interrupt) delete opts.interrupt.pins // if .interrupt was passed then .pins must be removed
delete opts.sockets // .sockets is used by uci base so clear it if was used by enduser and sent by mistake delete opts.sockets // .sockets is used by uci base so clear it if was used by enduser and sent by mistake
log.debug({msg:'passed options before setting',options:opts}) log.debug({msg:'passed options before setting',options:opts})
// if options doesn't contain a pin number key with mport and other interrupt pin related information
// then it is assume that pins[0] is port A and pins[1] is port B
// if iport or ipath is set then all interrupts have a single consolidating socket // if iport or ipath is set then all interrupts have a single consolidating socket
if (typeof opts.iport === 'number' || opts.ipath) { // if (typeof opts.iport === 'number' || opts.ipath) {
if (typeof opts.iport === 'number') { // if (typeof opts.iport === 'number') {
opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + 'inter#c>t' // opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + 'inter#c>t'
opts.inter = { port: opts.iport } // opts.inter = { port: opts.iport }
opts.inter.host = opts.ihost || opts.host // opts.inter.host = opts.ihost || opts.host
} // }
if (opts.ipath) { // if (opts.ipath) {
opts.inter = { path: opts.ipath || 'interrupt' } // opts.inter = { path: opts.ipath || 'interrupt' }
opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + 'inter#c>n' // opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + 'inter#c>n'
} // }
} else { // } else {
// otherwise each pin will have its own socket so make a client for each // // otherwise each pin will have its own socket so make a client for each
pins.forEach((pin, index) => { // pins.forEach((pin, index) => {
let ipin = 'i' + pin // let ipin = 'i' + pin
opts[ipin] = opts[pin] || Object.assign({},opts.interrupt) || {} // opts[ipin] = opts[pin] || Object.assign({},opts.interrupt) || {}
if (index === 1) opts[ipin].mport = opts[ipin].mport || 'B' // if (index === 1) opts[ipin].mport = opts[ipin].mport || 'B'
delete opts[pin] // delete opts[pin]
if (opts[ipin].host) { // if (opts[ipin].host) {
opts[ipin].port = opts[ipin].port ? opts[ipin].port + +pin : 9000 + parseInt(pin) // opts[ipin].port = opts[ipin].port ? opts[ipin].port + +pin : 9000 + parseInt(pin)
opts[ipin].host = opts[ipin].host // opts[ipin].host = opts[ipin].host
opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + ipin + '#c>t' // opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + ipin + '#c>t'
} // }
// no host will make a pipe by default // // no host will make a pipe by default
else { // else {
opts[ipin].path = (opts[ipin].path || 'interrupt') + ':'+ pin // opts[ipin].path = (opts[ipin].path || 'interrupt') + ':'+ pin
opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + ipin + '#c>n' // opts.sockets = (opts.sockets ? opts.sockets + ',' : '') + ipin + '#c>n'
} // }
}) // })
} // }
super(opts) super(opts)
this.opts = opts
log = logger({ log = logger({
file: 'src/mcp230xxi.js', file: 'src/mcp230xxi.js',
@ -66,94 +70,121 @@ class MCP230XXi extends MCP230XX {
this[pin] = opts['i' + pin] || {} this[pin] = opts['i' + pin] || {}
}) })
this.pins = pins this.pins = pins
Object.assign(this.commands.pin, this.bindFuncs(ipincommands)) // add interrupt pin commands to base set in "command.js" this.commands.interrupt = this.bindFuncs(icommands) // add interrupt pin commands to base set in "command.js"
this.addNamespace('commands', 'c') this.addNamespace('commands', 'c') // add access via push to same commands
this._interruptProcess = null this._interruptProcess = process
this.ready = false this.ready = false
log.info({ opts: opts, pins: pins }, 'options for mcp interrupt processor') log.info({ opts: opts, pins: pins }, 'options for mcp interrupt processor')
} }
async init() { async init() {
if (this.ipath) await this.addSocket('inter-n','s','n',{path:this.ipath})
if (this.iport) await this.addSocket('inter-t','s','t',{port:this.iport})
await super.init() await super.init()
for (let pin of this.pins) {
let cfg = {
port: this[pin].mport || 'A',
pins: this[pin].pins || 'all',
cfg: this[pin].type || 'input_interrupt'
}
// this will set default type to internal pullup, only need to to change indivial pins to external if desired // this will set default type to internal pullup, only need to to change indivial pins to external if desired
await this.pin.cfg(cfg) await this.pin.cfg({port:'A',pins:'all',cfg:'input_interrupt'})
log.info('initial resetting of mcp interrupt port for corresponding sbc gpio pin') let status = await this._resetInterrupt('A')
await this._reset(this[pin].mport) log.debug('configure all port A pins as interrupts. Reset port A interrupt', status)
if (this.chip17) {
await this.pin.cfg({port:'B',pins:'all',cfg:'input_interrupt'})
let status = await this._resetInterrupt('B')
log.debug('configure all port B pins as interrupts. Reset port B interrupt', status)
}
}
async _readyInterrupt(port) {
let istate = await this.bus.read(port !== 'B' ? 0x07 : 0x17)
if (istate.response) {
this.ready = false
return false
}
else {
this.ready = true this.ready = true
return true
}
} }
this.on('interrupt', function(details) { async _resetInterrupt(port) {
details.id = this.id
if (!this._interruptProcess) {
console.log('----default interrupt processor for mcp instance----')
console.log('create your own function and register it with .interruptProcess(function)')
console.log(this.id)
console.dir(details)
} else this._interruptProcess(details)
})
}
async _reset(port) {
// local non-packet hidden command
log.debug(`resetting interrupt for port ${port || 'A'},${this.id} arg ${port !== 'B' ? 0x08 : 0x18}`) log.debug(`resetting interrupt for port ${port || 'A'},${this.id} arg ${port !== 'B' ? 0x08 : 0x18}`)
return await this.bus.read(port !== 'B' ? 0x08 : 0x18) // 0x08 is intcap interrupt capture register await this.bus.read(port !== 'B' ? 0x08 : 0x18) // 0x08 is intcap interrupt capture register
return(await this._readyInterrupt(port))
}
_getPortByPin(pin) {
let port = this[pin] ? this[pin].mport : null
let index = this.pins.map(pin => pin.toString()).indexOf(pin.toString())
port = port || index <= 0 ? 'A' : 'B'
return port
} }
interruptProcessor(func) { interruptProcessor(func) {
this._interruptProcess = func this._interruptProcess = func
} }
} // end of MCP230XXi Class } // end of MCP230XXi Class
export default MCP230XXi export default MCP230XXi
// default processor
function process(details) {
details.id = this.id
console.log('----default interrupt processor for mcp instance----')
console.log('here is where you could either locally take some action for send/push on a message to another process')
console.log('create your own function and register it with .interruptProcesser(function)')
console.log(this.id)
console.dir(details)
}
// commands to be added to pin packet command functions // commands to be added to pin packet command functions
const ipincommands = { const icommands = {
interrupt: { status: async function(packet) {
// pin is interrupt pin on sbc for port
let port = packet.port || this._getPortByPin(packet.pin)
let res = await this._readyInterrupt(port)
return {cmd:'reply', request:'interrupt.status', port:port, ipin:packet.pin, ready:res}
},
reset: async function(packet) { reset: async function(packet) {
log.info( // pin is interrupt pin on sbc for port
{ packet: packet }, let port = packet.port || this._getPortByPin(packet.pin)
`'socket has push requested a reset of mcp interrupt port for gpio pin ${ log.info({ packet: packet, port:port, msg:`remote interrupt reset for port ${port}`})
packet.pin await this._resetInterrupt(port)
}` let res = await this._readyInterrupt(port)
) return {cmd:'reply', request:'interrupt.reset', port:port, ipin:packet.pin, ready:res}
let port = this[packet.pin].mport || 'A'
await this._reset(port)
}, },
// given a gpio interrupt then push a packet with cmd: 'pin.interrupt.find' and pin: the gpio pin number // given a gpio interrupt then push a packet with cmd: 'pin.interrupt.find' and pin: the gpio pin number
find: async function(inter) { find: async function(inter) {
if (this.ready) { if (this.ready) {
// protects tripped interrupt before it's fully initialized, or interrupt requests arriving before porcessing is complete // protects tripped interrupt before it's fully initialized, or interrupt requests arriving before porcessing is complete
this.ready = false this.ready = false
log.debug({msg:'raw packet from interrupt, will now find the pin that caused interrupt', inter:inter}) log.debug({msg:'raw packet from interrupt, finding pin that caused interrupt', inter:inter})
let packet = { pins: 'all', reg: 'intf' } let packet = { pins: 'all', reg: 'intf' }
packet.port = inter.port || this[inter.pin].mport || 'A' packet.port = inter.port || this._getPortByPin(inter.pin)
let res = await this.pin.status(packet) let res = await this.pin.status(packet) // read port interrupt status
if (!res.status) return { error: 'no pin associated with interrupt' } let status = await this._resetInterrupt(packet.port)
log.debug({interrupt:res, reset:status, msg:'interrupt read and reset'})
this.ready = true
if (!res.status) {
log.warn({inter:inter, msg:'no pin associated with interrupt'})
return { error: 'no pin associated with interrupt' }
}
let pin = byteFormat(res.status.port, { in: 'ARY', out: 'PLC' }) let pin = byteFormat(res.status.port, { in: 'ARY', out: 'PLC' })
res.pin = pin[0] res.pin = pin[0]
packet.pins = pin[0] packet.pins = pin[0]
packet.reg = null packet.reg = null
if (packet.pins) { if (packet.pins) { // avoid bad interrupt (i.e. no pin caused interrupt)
// avoid bad interrupt (i.e. no pin caused interrupt)
res.ipin = inter.pin res.ipin = inter.pin
res.port = packet.port res.port = packet.port
delete inter.cmd; delete inter._header; delete inter.pin delete inter.cmd; delete inter._header; delete inter.pin
Object.assign(res,inter) Object.assign(res,inter)
delete res.status delete res.status
res.state = (await this.pin.status(packet)).status.pins[0][1] res.state = (await this.pin.status(packet)).status.pins[0][1]
console.log('emitted interrupt packet', res) log.debug('emit/call interrupt details processing', res)
this.emit('interrupt', res) this.emit('mcpInterrupt',Object.assign({},res)) // emit for end user purposes, don't allow mutation
log.debug({msg:'found pin now resetting mcp port interrupt', response:res}) this._interruptProcess(res)
}
await this._reset(packet.port)
this.ready = true
return res return res
} else {
log.warn({inter:inter, msg:'no pin associated with interrupt'})
return { error: 'no pin associated with interrupt' }
} }
} }
} }