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


    npm i efm8load

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