i2cInterface.js

const REGISTRY = require('./registry');

class i2cInterface {
	
	/*
	------------------------------------------
	| construct:void (-)
	------------------------------------------ */
	constructor(){
		this._readRegisters( REGISTRY.OSC_CALIBRATE_VAL, 16, (err, data) => {
			console.log(data.readInt16BE(8));
		});
	}

	/*
	------------------------------------------
	| _readRegisters:void (-)
	|
	| Read the registers via I2C.
	------------------------------------------ */
	_readRegisters(addressToRead, bytesToRead, callback){
		this.queue.place( () => {
			this.i2c.transfer( new Buffer([addressToRead]), bytesToRead, (err, data) => {
				this.queue.next();
				if( callback ){
					callback(err, data);
				}
			})
		});
	}

	/*
	------------------------------------------
	| _writeRegisters:void (-)
	|
	| Write to the register via I2C.
	------------------------------------------ */
	_writeRegisters(addressToRead, dataToWrite, callback){
		// console.log(addressToRead, dataToWrite, callback);

		this.queue.place( () => {
			this.i2c.send( new Buffer([addressToRead, dataToWrite]), (err, data) => {
				this.queue.next();
				if( callback ){
					callback(err, data);
				}
			})
		});
	}
}