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getStreaming.js
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getStreaming.js
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/**
* This is an example from the readme.md
* On windows you should run with PowerShell not git bash.
* Install
* [nodejs](https://nodejs.org/en/)
*
* To run:
* change directory to this file `cd examples/debug`
* do `npm install`
* then `npm start`
*/
const debug = false; // Pretty print any bytes in and out... it's amazing...
const verbose = true; // Adds verbosity to functions
const Cyton = require('../../openBCICyton');
let ourBoard = new Cyton({
debug: debug,
verbose: verbose
});
// If you know your port number then enter below if, you don't
// uncommecnt the listPorts function below to print the serial ports
// attached to your computer. You do need to have the FTDI VCP driver
// installed.
let portName = 'COM4';
// ourBoard.listPorts()
// .then((ports) => {
// console.log('ports', JSON.stringify(ports));
// });
// You can also pass the port name as a command line argument!
// i.e. windows
// > node .\examples\getStreaming\getStreaming.js COM5
// REMBEMER THE COM NUMBER CHANGES ON WINDOWS!!
// i.e. macOS
// $ node examples/getStreaming/getStreaming.js /dev/tty/usbserial-DB008JAM
const myArgs = process.argv.slice(2);
if (myArgs.length === 1) {
portName = myArgs[0];
}
ourBoard.on('sample', (sample) => {
/** Work with sample */
for (let i = 0; i < ourBoard.numberOfChannels(); i++) {
console.log(`Channel ${(i + 1)}: ${sample.channelData[i].toFixed(8)} Volts.`);
// prints to the console
// "Channel 1: 0.00001987 Volts."
// "Channel 2: 0.00002255 Volts."
// ...
// "Channel 8: -0.00001875 Volts."
}
});
/**
* Connect to the board with portName
* Only works if one board is plugged in
* i.e. ourBoard.connect(portName).....
*/
ourBoard.connect(portName) // Port name is a serial port name, see `.listPorts()`
.then(() => {
return ourBoard.syncRegisterSettings();
})
.then((cs) => {
return ourBoard.streamStart();
})
.catch((err) => {
console.log('err', err);
return ourBoard.streamStart();
})
.catch((err) => {
console.log('fatal err', err);
process.exit(0);
});
function exitHandler (options, err) {
if (options.cleanup) {
if (verbose) console.log('clean');
ourBoard.removeAllListeners();
/** Do additional clean up here */
}
if (err) console.log(err.stack);
if (options.exit) {
if (verbose) console.log('exit');
ourBoard.disconnect()
.then(() => {
process.exit(0);
})
.catch((err) => {
console.log(err);
process.exit(0);
});
}
}
if (process.platform === 'win32') {
const rl = require('readline').createInterface({
input: process.stdin,
output: process.stdout
});
rl.on('SIGINT', function () {
process.emit('SIGINT');
});
}
// do something when app is closing
process.on('exit', exitHandler.bind(null, {
cleanup: true
}));
// catches ctrl+c event
process.on('SIGINT', exitHandler.bind(null, {
exit: true
}));
// catches uncaught exceptions
process.on('uncaughtException', exitHandler.bind(null, {
exit: true
}));