mbed-lstools is a Python module that detects and lists mbed-enabled devices connected to the host computer. It will be delivered as a redistributable Python module (package) and command line tool.

Currently supported operating system:

• Windows 7.
• Ubuntu.
• Mac OS X (Darwin).

The stand-alone mbed-lstools Python package is still under development, but it's already delivered as part of the mbed SDK's test suite and a command line tool (see below).

When connecting more than one mbed-enabled device to the host computer, it takes time to manually check the platforms' binds:

• Mount point (disk).
• Virtual serial port.
• mbed's TargetID and generic platform name.

mbedls provides these points of information for all connected boards at once in a simple console (terminal) output.

Tip: Because we are all automation fanatics, the mbedls command will also output mbed-enabled auto-detection data in JSON format (see below).

mbed-ls module is redistributed via PyPI. We recommend you use the application pip.

To install mbed-ls from Python Package Index use command:

$ pip install mbed-ls

Note: Python 2.7.9 and later (on the Python 2 series), and Python 3.4 and later include pip by default, so you may have pip already.

Prerequisites: you need to have Python 2.7.x installed on your system.

Note: if your OS is Windows, please follow the installation instructions for the serial port driver.

To install the mbed-ls module:

Clone the mbed-ls repository. The following example uses the GitHub command line tools, but you can do this directly from the website:

$ git clone <link-to-mbed-ls-repo>

Change the directory to the mbed-ls repository directory:

$ cd mbed-ls

Now you are ready to install mbed-ls.

$ python setup.py install

On Linux, if you have a problem with permissions please try to use sudo:

$ sudo python setup.py install

The above command should install the mbed-ls Python package (import mbed_lstools) and mbedls command.

To test if your installation succeeded try the mbedls command:

$ mbedls

Or use the Python interpreter and import mbed_lstools:

$ python
Python 2.7.8 (default, Jun 30 2014, 16:03:49) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

Generic mbedls API example:

>>> import mbed_lstools
>>> mbeds = mbed_lstools.create()
>>> mbeds
<mbed_lstools.lstools_win7.MbedLsToolsWin7 instance at 0x02F542B0>
>>> mbeds.list_mbeds()
[{'platform_name': 'K64F', 'mount_point': 'E:', 'target_id': '02400203D94B0E7724B7F3CF', 'serial_port': u'COM61'}]
>>> print mbeds

Extended mbedls API example:

>>> import mbed_lstools
>>> m = mbed_lstools.create()
>>> dir(m)
['DEBUG_FLAG', 'ERRORLEVEL_FLAG', '__doc__', '__init__', '__module__', '__str__', 'debug', 'discover_connected_mbeds', 'err', 'get_connected_mbeds', 'get_dos_devices', 'get_json_data_from_file', 'get_mbed_com_port', 'get_mbed_devices', 'get_mbed_htm_target_id', 'get_mbeds', 'get_mounted_devices', 'get_string', 'iter_keys', 'iter_keys_as_str', 'iter_vals', 'list_mbeds', 'list_mbeds_by_targetid', 'list_mbeds_ext', 'list_platforms', 'list_platforms_ext', 'load_mbed_description', 'manufacture_ids', 'os_supported', 'regbin2str', 'scan_html_line_for_target_id', 'usb_vendor_list', 'winreg'] >>> m.list_platforms()
['LPC1768', 'K64F']
>>> m.list_platforms_ext()
{'K64F': 1, 'LPC1768': 2}

In the near future the mbed-ls module will be redistributed via PyPI. We recommend you use the [pip application](here: https://pip.pypa.io/en/latest/installing.html#install-pip).

Note: Python 2.7.9 and later (on the Python 2 series), and Python 3.4 and later include pip by default, so you may have pip already.

After installation of the mbed-ls package, you can use the mbedls command. It allows you to list all connected mbed-enabled devices and gives you the correct association between your board mount point (disk) and the serial port. TargetID information is also provided for your information.

$ mbedls
+---------------------+-------------------+-------------------+--------------------------------+
|platform_name        |mount_point        |serial_port        |target_id                       |
+---------------------+-------------------+-------------------+--------------------------------+
|KL25Z                |I:                 |COM89              |02000203240881BBD9F47C43        |
|NUCLEO_F302R8        |E:                 |COM34              |07050200623B61125D5EF72A        |
+---------------------+-------------------+-------------------+--------------------------------+

If you want to use mbedls in your toolchain, continuous integration or automation script and do not necessarily want to use the Python module mbed_lstools - this solution is for you.

You can export mbedls outputs to JSON format: just use the ---json switch and dump your file on the screen or redirect to a file. It should help you further automate your processes.

$ mbedls --json
[
    {
        "mount_point": "E:",
        "platform_name": "NUCLEO_L152RE",
        "serial_port": "COM9",
        "target_id": "07100200860579FAB960EFD7"
    },
    {
        "mount_point": "F:",
        "platform_name": null,
        "serial_port": "COM5",
        "target_id": "A000000001"
    },
    {
        "mount_point": "G:",
        "platform_name": "NUCLEO_F302R8",
        "serial_port": "COM34",
        "target_id": "07050200623B61125D5EF72A"
    },
    {
        "mount_point": "H:",
        "platform_name": "LPC1768",
        "serial_port": "COM77",
        "target_id": "101000000000000000000002F7F18695"
    },
    {
        "mount_point": "I:",
        "platform_name": "KL25Z",
        "serial_port": "COM89",
        "target_id": "02000203240881BBD9F47C43"
    }
]

Let's connect a few mbed boards to our Ubuntu host. The devices should mount as MSC and CDC (virtual disk and serial port). We'll use regular Linux commands to see the boards, then see how mbed-ls displays them.

In this example, we've connected to our Ububtu machine's USB ports:

• 2 x STMicro's Nucleo mbed boards.
• 2 x NXP mbed boards.
• 1 x Freescale Freedom board.

We can see the mounting result in the usb-id directories in Ubuntu's file system under /dev/. To list mbed boards mounted to serial ports (CDC) via USB, we use the general Linux command:

$ ll /dev/serial/by-id

We'll see:

total 0
drwxr-xr-x root 140 Feb 19 12:38 ./
drwxr-xr-x root  80 Feb 19 12:35 ../
lrwxrwxrwx root  13 Feb 19 12:38 usb-MBED_MBED_CMSIS-DAP_02000203240881BBD9F47C43-if01 -> ../../ttyACM0
lrwxrwxrwx root  13 Feb 19 12:35 usb-MBED_MBED_CMSIS-DAP_A000000001-if01 -> ../../ttyACM4
lrwxrwxrwx root  13 Feb 19 12:35 usb-mbed_Microcontroller_101000000000000000000002F7F18695-if01 -> ../../ttyACM3
lrwxrwxrwx root  13 Feb 19 12:35 usb-STMicroelectronics_STM32_STLink_066EFF525257775087141721-if02 -> ../../ttyACM2
lrwxrwxrwx root  13 Feb 19 12:35 usb-STMicroelectronics_STM32_STLink_066EFF534951775087215736-if02 -> ../../ttyACM1

To list boards mounted to disks (MSC) via USB, we use the general Linux command:

$ ll /dev/disk/by-id

We'll see:

total 0
drwxr-xr-x root 340 Feb 19 12:38 ./
drwxr-xr-x root 120 Feb 19 12:35 ../
lrwxrwxrwx root   9 Dec  3 09:10 ata-HDS728080PLA380_40Y9028LEN_PFDB32S7S44XLM -> ../../sda
lrwxrwxrwx root  10 Dec  3 09:10 ata-HDS728080PLA380_40Y9028LEN_PFDB32S7S44XLM-part1 -> ../../sda1
lrwxrwxrwx root  10 Dec  3 09:10 ata-HDS728080PLA380_40Y9028LEN_PFDB32S7S44XLM-part2 -> ../../sda2
lrwxrwxrwx root  10 Dec  3 09:10 ata-HDS728080PLA380_40Y9028LEN_PFDB32S7S44XLM-part5 -> ../../sda5
lrwxrwxrwx root   9 Dec  3 09:10 ata-TSSTcorpDVD-ROM_TS-H352C -> ../../sr0
lrwxrwxrwx root   9 Feb 19 12:35 usb-MBED_MBED_CMSIS-DAP_A000000001-0:0 -> ../../sdf
lrwxrwxrwx root   9 Feb 19 12:38 usb-MBED_microcontroller_02000203240881BBD9F47C43-0:0 -> ../../sdb
lrwxrwxrwx root   9 Feb 19 12:35 usb-MBED_microcontroller_066EFF525257775087141721-0:0 -> ../../sdd
lrwxrwxrwx root   9 Feb 19 12:35 usb-MBED_microcontroller_066EFF534951775087215736-0:0 -> ../../sdc
lrwxrwxrwx root   9 Dec  3 16:10 usb-MBED_microcontroller_0670FF494956805087154420-0:0 -> ../../sdc
lrwxrwxrwx root   9 Feb 19 12:35 usb-mbed_Microcontroller_101000000000000000000002F7F18695-0:0 -> ../../sde
lrwxrwxrwx root   9 Dec  3 09:10 wwn-0x5000cca30ccffb77 -> ../../sda
lrwxrwxrwx root  10 Dec  3 09:10 wwn-0x5000cca30ccffb77-part1 -> ../../sda1
lrwxrwxrwx root  10 Dec  3 09:10 wwn-0x5000cca30ccffb77-part2 -> ../../sda2
lrwxrwxrwx root  10 Dec  3 09:10 wwn-0x5000cca30ccffb77-part5 -> ../../sda5

Note: mbed-ls tools pair only serial ports and mount points (not CMSIS-DAP - yet).

We can see that on our host machine (running Ubuntu) there are many 'disk type' devices visible under /dev/disk. The mbed boards can be distinguished and filtered by their unique USB-ID conventions. In our case, we can see pairs of usb-ids in both /dev/serial/usb-id and /dev/disk/usb-id with embedded TargetID. TargetID can be filtered out, for example using this sudo-regexpr: (“MBED”|”mbed”|”STMicro”)_([a-zA-z_-]+)_([a-fA_F0-0]){4,}

For example, we can match the board 066EFF525257775087141721 by connecting a few dots:

• usb-MBED_microcontroller_066EFF525257775087141721-0:0 -> ../../sdd
• usb-STMicroelectronics_STM32_STLink_066EFF525257775087141721-if02 -> ../../ttyACM2 Based on the TargetID hash.

From this we know that the target platform has these properties:

• The unique target platform identifier is 066E.
• The serial port is ttyACM2.
• The mount point is sdd.

Your mbed-ls implementation resolves those three and creates a “tuple” with those values (for each connected device). Using this tuple(s), mbed-ls will convert the platform number to a human-readable name etc.

Note that for some boards the TargetID format is proprietary (see STMicro boards) and usb-id does not have a valid TargetID where the four first letters are the target platform's unique ID. In that case, mbed-ls tools inspects the mbed.htm file on the mbed mounted disk to get the proper TargetID from the URL in the meta part of the HTML header.

In the following example, the URL http://mbed.org/device/?code=07050200623B61125D5EF72A for the STMicro Nucleo F302R8 board contains the valid TargetID 07050200623B61125D5EF72A, which mbed-ls uses to detect the platform_name. mbed-ls will then replace the invalid TargetID in usb-id with the value from mbed.htm.

<!-- mbed Microcontroller Website and Authentication Shortcut -->
<!-- Version: 0200 Build: Aug 27 2014 13:29:28 -->
<html>
<head>
<meta http-equiv="refresh" content="0; url=http://mbed.org/device/?code=07050200623B61125D5EF72A"/>
<title>mbed Website Shortcut</title>
</head>
<body></body>
</html>

This is the result of mbedls listing the connected devices that we saw above:

$ mbedls
+---------------------+-------------------+-------------------+----------------------------------------+
|platform_name        |mount_point        |serial_port        |target_id                               |
+---------------------+-------------------+-------------------+----------------------------------------+
|KL25Z                |I:                 |COM89              |02000203240881BBD9F47C43                |
|LPC1768              |H:                 |COM77              |101000000000000000000002F7F18695        |
|NUCLEO_F302R8        |G:                 |COM34              |07050200623B61125D5EF72A                |
|NUCLEO_L152RE        |E:                 |COM9               |07100200860579FAB960EFD7                |
|unknown              |F:                 |COM5               |A000000001                              |
+---------------------+-------------------+-------------------+----------------------------------------+

You can help us improve the mbed-ls tools by - for example - committing a new OS port. You can see the list of currently supported OSs in the Description section; if your OS isn't there, you can port it.

For further study please check how Mac OS X (Darwin) was ported in this pull request.

• mbed-ls package contains basic unit tests.
• Tests are stored under \mbed-ls\test directory.
• Tests cover basic function calls, object construction and check if minimal requirements for OS porting are fulfilled.
• Standard Python’s unittest library was used so it is easy to contribute to test effort. To invoke test procedure from command line please change directory to current mbed-ls repo directory and call setup.py with 'test' option.

$ cd mbed-ls
$ python setup.py test

running test
running egg_info
writing requirements to mbed_ls.egg-info\requires.txt
writing mbed_ls.egg-info\PKG-INFO
writing top-level names to mbed_ls.egg-info\top_level.txt
writing dependency_links to mbed_ls.egg-info\dependency_links.txt
writing entry points to mbed_ls.egg-info\entry_points.txt
reading manifest file 'mbed_ls.egg-info\SOURCES.txt'
writing manifest file 'mbed_ls.egg-info\SOURCES.txt'
running build_ext
test_example (test.basic.BasicTestCase) ... ok
test_detect_os_support_ext (test.detect_os.DetectOSTestCase) ... ok
test_porting_create (test.detect_os.DetectOSTestCase) ... ok
test_porting_mbed_lstools_os_info (test.detect_os.DetectOSTestCase) ... ok
test_porting_mbed_os_support (test.detect_os.DetectOSTestCase) ... ok
.
.
.
----------------------------------------------------------------------
Ran 18 tests in 0.302s

OK