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As of April 13, 2017, the status is that the Ramp -> Display composite accessor runs on the Maxim Integrated MAX32630. The sizes are:

   text    data     bss     dec     hex filename
 291848    2964    8400  303212   4a06c BUILD/mbed-duktape2.elf

The work is in accessors/web/hosts/duktape/mbed-duktape2. Running make in that directory uses #defines to create a Ramp -> Display composite accessor.

Future work would include porting accessor implementations to this chip.

The text below describes how to get started with the chip.


One idea is to run Accessors on the Maxim Integrated MAX32630 using Duktape.

Available from Digikey as dev kit for $28.05

Development Kit

There are two boards:

  1. The MAX32630FTHR, which is rectangular and has a SD slot and two micro usb-b connectors
  2. The MAXREFDES100HDK, which is house shaped with a connector on the end and a micro usb-b connector.

The should be connected together via a ribbon cable. says to

  1. plug the port on the MAX32630FTHR into a USB cable and then to the computer
  2. plug the hdk port of the MAXREFDES100HDK into a USB cable and then to the computer

A USB drive should show up on the host computer.



There are two different mbed build systems

  1. A web-based system that requires a free account
  2. A command line system.

Starting with the web-based system is easier

  1. Go to then, under Example Programs, click on mbed-os-example-blinky
  2. In the mbed OS Blinky page, in the upper right, click on import into compiler
  3. In the mbed compiler window, select the /mbed-os-example-blinky project and then hit the Compile button
  4. Save the binary that is created
  5. Copy the binary to the drive that is provided by the board: cp mbed-os-example-blinky_MAX32630FTHR.bin /Volumes/DAPLINK/

Blinky Troubleshooting

  • Make sure that the correct device is selected. The name of the binary that is created should include MAX32630FTHR

Command Line Interface describes how to use the command line to install

mbed requires Python 2.


the following failure occurred:

bash-3.2$ mbed import mbed-os-example-blinky
Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.6/bin/mbed", line 11, in <module>
    load_entry_point('mbed-cli==1.0.0', 'console_scripts', 'mbed')()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pkg_resources/", line 561, in load_entry_poi\
    return get_distribution(dist).load_entry_point(group, name)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pkg_resources/", line 2631, in load_entry_po\
    return ep.load()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pkg_resources/", line 2291, in load
    return self.resolve()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pkg_resources/", line 2297, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mbed/", line 1040
    sorted_scms = sorted(sorted_scms, key=lambda (m, _): not m)
bash-3.2$ which mbed

Instead, use the pip2 installed by brew:

  sudo -H pip2 install mbed-cli
  /usr/local/bin/mbed import mbed-os-example-blinky

Compile with:

  mbed compile -m MAX32630FTHR -t GCC_ARM

Then copy the binary:

  cp ./BUILD/MAX32630FTHR/GCC_ARM/mbed-os-example-blinky.bin /Volumes/DAPLINK/

CLI Problems

If you get

bash-3.2$ mbed compile -m K64F -t ARM
usage: [-h] [-m MCU] [-t TOOLCHAIN] [--color] [--cflags CFLAGS] [--asmflags ASMFLAGS] [--ldflags LDFLAGS] [-c] [--profile PROFILE]
               [--app-config APP_CONFIG] [-p PROGRAM] [-n PROGRAM] [-j JOBS] [-v] [--silent] [-D MACROS] [-S] [-f GENERAL_FILTER_REGEX] [--automated]
               [--host HOST_TEST] [--extra EXTRA] [--peripherals PERIPHERALS] [--dep DEPENDENCIES] [--source SOURCE_DIR] [--duration DURATION]
               [--build BUILD_DIR] [-N ARTIFACT_NAME] [-d DISK] [-s SERIAL] [-b BAUD] [-L] [--rtos] [--rpc] [--eth] [--usb_host] [--usb] [--dsp]
               [--fat] [--ublox] [--testlib] [-l LINKER_SCRIPT] error: Could not find executable for ARM.
Currently set search path: No path set
[mbed] ERROR: "python" returned error code 2.
[mbed] ERROR: Command "python -u /Users/cxh/src/max/mbed-os-example-blinky/mbed-os/tools/ -t ARM -m K64F --source . --build ./BUILD/K64F/ARM" in\
then the problem is that you are running with the wrong machine (K64F) and toolchain (ARM)


Build Duktape for the Maxim Pegasus

  1. See The Accessors Repository for how to get access to the repository
    bash-3.2$ pwd
  2. Run ant in the accessors/web directory to build .h versions of .js files in accessors/web/hosts/duktape/eduk2/
  3. Under Mac OS X, install brew and install arm-none-eabi-gcc. In March, 2016, macports arm-none-eabi-gcc 5.4.0 did not work during linking:
    /opt/local/lib/gcc/arm-none-eabi/5.4.0/../../../../arm-none-eabi/bin/ld: cannot find crt0.o: No such file or directory
    : cannot find -lnosys
    collect2: error: ld returned 1 exit status
    bash-3.2$ /opt/local/lib/gcc/arm-none-eabi/5.4.0/../../../../arm-none-eabi/bin/ld --version
    /opt/local/lib/gcc/arm-none-eabi/5.4.0/../../../../arm-none-eabi/bin/ld --version
    GNU ld (GNU Binutils) 2.28
    The solution is to use brew:
    export PATH=/usr/local/Cellar/arm-none-eabi-gcc/6-2017-q1-update/bin:${PATH}
    bash-3.2$ which arm-none-eabi-gcc
    bash-3.2$ arm-none-eabi-gcc --version
    arm-none-eabi-gcc (GNU Tools for ARM Embedded Processors 6-2017-q1-update) 6.3.1 20170215 (release) [ARM/embedded-6-branch revision 245512]
    Copyright (C) 2016 Free Software Foundation, Inc.
    This is free software; see the source for copying conditions.  There is NO

  4. Run make in the eduk2 directory to create commonHost.h and other files
    (cd ../eduk2; make)
  5. Run make in the mbed-duktape2 directory, then copy the file:
    cp BUILD/mbed-duktape2.bin /Volumes/DAPLINK/
  6. The LED on the MAXREFDES100HDK, which is house shaped with a connector on the end, should blink
  7. Under Mac OS, eventually a dialog appears about how DAPLINK was not properly disconnected.
  8. On the The MAX32630FTHR, which is rectangular and has a SD slot and two micro usb-b connectors, press the reset switch near the white power connector
  9. Use a serial tool like CoolTerm to find the port, set it for 9600-8-None-1
  10. You should see output in CoolTerm

Duktape Problems

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Page last modified on April 13, 2017, at 10:56 PM