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This is a toolchain for LinkIt_Assist_2502 for Linux

http://labs.mediatek.com/site/global/developer_tools/mediatek_linkit_assist_2502/whatis_2502/index.gsp

http://www.seeed.cc/rephone/

Setup

  1. Download the arm compiler gcc-arm-none-eabi-4_9-2014q4-20141203-linux.tar.bz2

  2. Download the Windows SDK

  3. Install pyserial.

  4. Add your user to dailout group.

    sudo adduser $USER dialout

  5. Open the Makefile and set your TOOLCHAIN Path and your LINKIT_ASSIST_SDK_PATH

  6. Install Python 3.5.x

  7. Install udev rule under /etc/udev/rules.d/ called 71-rephone.rules. The magic job is here setting ID_MM_DEVICE_IGNORE environment value to inform ModemManager to skip device.

    ATTRS{idVendor}=="0e8d" ATTRS{idProduct}=="0003", ENV{ID_MM_DEVICE_IGNORE}="1" ATTRS{idVendor}=="0e8d" ATTRS{idProduct}=="0023", ENV{ID_MM_DEVICE_IGNORE}="1"

Running the sample

  1. Switch your device on

    make all

    make upload

Tools

merge_mtk.py adds a header and the size of the elf file for loading

uploader.py stops the running process and uploads the main.vxp to the device and restarts the application.

mon.py a simple debug monitor. Shows vm_log* messages from the device. Only works with Firmware Version W15.19.p2

ToDo Understand the header format

ToDo Understand the resource file format and building

ToDo Understand the monitor tool

FirmwareUploader/firmwareUploader.py a firmware upload tool for linux.

The Device

Firmware Version W15.19.p2

LINKIT_ASSIST_SDK/tools/FirmwareUpdater/firmware/LinkIt_Device/LinkIt_Assist_2502

from the MediaTek_LinkIt_Assist_2502_SDK_2_0_46.zip

Power off and connect USB

Ubuntu Linux found

(idVendor=0e8d idProduct=0003) /dev/ttyUSB0 and

switch after some seconds to USB Mass Storage device

(idVendor=0e8d idProduct=0002)

(5.2 MB ). This is partions C:

Power on and connect to USB

Ubuntu Linux found ( idVendor=0e8d idProduct=0023 )

/dev/ttyACM0 ( Mtk Modem Port ) used for uploading *.vxp Applications

/dev/ttyACM1 ( Mtk Debug Port ) used for debugging

The device as 2 partions C: and D:.

Partions D: can only accessed via AT commands from the modem port. see uploader.py

Firmware Version W15.19.p2-uart

Connect to USB without battery

Ubuntu Linux found (idVendor=0e8d idProduct=0003) /dev/ttyUSB0. The device resets and connects again.

Links

There is also a Arduino IDE for RePhone for GNU/Linux users

Arduino IDE for RePhone on GNU/Linux

Arduino IDE for RePhone on OSX and Windows

or with Eclipse

RePhone development on Linux

Hacking

There is no memory protection unit in place. So we can direct access SOC hardware regs.

This is great for hacking ... Sample

static VMUINT32* HARDWARE_CODE = (VMUINT32*)0x80000008;

vm_log_debug("%x",*HARDWARE_CODE);

Mac OS (El Capitan) 10.11.5

  1. Install Python 3.5.x

  2. Install the GCC ARM Embedded 4.9-2014-q4-major for Mac.

Test the USB port

Power on the device an connect it to the USB port.

Open the terminal.

ioreg -p IOUSB -l
	
+-o Product@14100000  <class AppleUSBDevice, id 0x1000007b1, registered, ma$
    {
       ...
      "Bus Power Available" = 500
      "USB Address" = 14
      "bMaxPacketSize0" = 8
      "iProduct" = 6
      "iSerialNumber" = 0
      ...
      "USB Vendor Name" = "MediaTek Inc"
      "idVendor" = 3725
       ...
    }

ls /dev/cu* 

/dev/cu.usbmodem1411             /dev/cu.usbmodem1413

Test the interface

screen /dev/cu.usbmodem1411

type

AT

OK

Run the uploader tool

./uploader.py --port /dev/cu.usbmodem1411

Monitor tool

./mon.py -p /dev/cu.usbmodem1413 --osx