59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
'use strict'
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const i2c = require('i2c-bus'),
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pA = require('bluebird').promisifyAll,
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pQ = require('promisqueue')
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const pify = require('pify')
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// TODO Create a Bus master class then BusRPi classes etc for actual hardware.
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class Bus {
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constructor(busnum = 1) {
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this.busnum = busnum
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this.q = new pQ({ limit: 1 })
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this.qAdd = (pjob) => { this.q.add(() => pjob) }
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this.bus = i2c.open(this.busnum, () => {})
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}
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// init() {
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// const bus = pA(i2c.open(this.busnum, () => {}), { suffix: "_p" }) //,multiArgs: true})
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//
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// }
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scan() { return pify(this.bus.scan).bind(this.bus)() }
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close() { return pify(this.bus.close).bind(this.bus)() }
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readRaw(address, length, buffer) {
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return pify(this.bus.i2cRead).bind(this.bus)(address, length, buffer)
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}
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writeRaw(address, length, buffer) {
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return pify(this.bus.i2cWrite).bind(this.bus)(address, length, buffer)
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}
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read(address, cmd) {
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// console.log("read: address, cmd", address, cmd)
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return pify(this.bus.readByte).bind(this.bus)(address, cmd)
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}
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write(address, cmd, byte) {
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// console.log("write: address, cmd, byte", address, cmd, byte)
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return pify(this.bus.writeByte.bind(this.bus))(address, cmd, byte)
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}
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read2(address, cmd) {
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return pify(this.bus.readWord.bind(this.bus))(address, cmd)
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}
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write2(address, cmd, bytes) {
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return pify(this.bus.writeWord.bind(this.bus))(address, cmd, bytes)
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}
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} // end of Bus Class
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module.exports = {
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Bus
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};
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