1.0.0 • Public • Published



npm install efm8load --save

How to Use

Load the module

var efm8load = require('efm8load');

Get a list of all EFM8 USB devices in bootloader mode

var devices = efm8load.devices();

devices will contain an array of objects, one for each EFM8 device available. Most important are family, the device family as identified by the productId, and loader, a function that returns an EFM8Loader instance for the device.

Here is some sample output:

[ { vendorId: 4292,
    productId: 60105,
    path: '0002:0023:00',
    release: 256,
    interface: 0,
    family: 'EFM8UB1',
    loader: [Function] } ]

Open a device

A device can be opened either by calling the loader function from the device list or by creating an EFM8Loader:

var loader = new efm8load.EFM8Loader(device);

If no device is given, the first EFM8 USB device is opened.


The EFM8Loader gives you access to all bootloader functions documented by SiLabs:

  • bootloaderVersion(callback)
  • identify(id, callback)
  • setup(callback)
  • erase(addr, data, callback)
  • write(addr, data, callback)
  • verify(addr, data, callback)
  • lock(signature, lock, callback)
  • runApp(callback)

The function provided as callback is always called with the arguments error, response.

Possible values of id can be found in efm8load.id, e.g. efm8load.id.EFM8UB10F8G_QFN20.

data should be an array of bytes.

Full example

Here is a exmple of how to determine the type of EFM8UB1:

var efm8load = require('efm8load');
var async = require('async');

// Open the first EFM8
var loader = new EFM8Loader();
// Find the first matching id
async.detectSeries(efm8load.id, function(id, cb){
  loader.identify(id, function(err, response){
    cb(null, !err && response.equals(efm8load.response.Ack));
}, function(err, result){
  // determine the key of result
  for(var key in efm8load.id){
    if(efm8load.id[key] === result){
      // log the device id
      console.log(key + ' (0x' + result[0].toString(16) + ', 0x' + result[1].toString(16) + ')');
  // close the device

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npm i efm8load

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