Using M3 open node standalone

1 - on your computer, you need to install

• gcc arm compiler : see this FAQ
• openocd (on ubuntu/debian) : > apt-get install openocd

2 - Then configure your account and udev to allow flashing the node as your regular user. Put yourself in the dialout group:

sudo usermod -a -G dialout $USER
# Then logout/login to make it effective

and write the following file /etc/udev/rules.d/iot-lab-ftdi.rules:

# Udev rules for iot-lab ftdi files

# open nodes TTY
SUBSYSTEM=="tty", SUBSYSTEMS=="usb", ENV{ID_SERIAL}=="IoT-LAB_M3", ENV{ID_USB_INTERFACE_NUM}=="01", SYMLINK+="ttyON_M3"

# Allow accessing jtag as dialout group
# idProduct and idVendor got with 'udevadm -a -n /dev/bus/usb/001/00[34]'
# https://wiki.archlinux.org/index.php/Udev#Accessing_firmware_programmers_and_USB_virtual_comm_devices
SUBSYSTEM=="usb", ATTR{idProduct}=="6010", ATTR{idVendor}=="0403", MODE="0664", GROUP="dialout"

3 - Re-Plug the M3 node on your PC to trigger udev

• Plug the M3 node on your PC through USB line, then you can see 2 Linux usb ports :
  • /dev/ttyUSB0 for jtag programmation
  • /dev/ttyUSB1 for printf debug on uart1
• If the node is well configured you should also see:
  • /dev/ttyON_M3 -> /dev/ttyUSB1 for easier access.

4 - If you don't have the /dev/ttyON_M3 the node is badly configured, you should reconfigure it, else goto 5

• download and compile this code.
• To reconfigure it run > ./ftdi-eeprom-config M3
• and then plug/unplug the node
• The expected output should now be the following:

   > ./ftdi-devices-list
   FTx232 devices lister by IoT-LAB
   Listing FT2232 devices...
   Found 1 device(s)
   Device 0:
        Manufacturer: IoT-LAB
        Description: M3
        Serial:
   All done, success! 

5 - Flash an openlab example on the node

• clone openlab
• compile openlab
• you can program and flash an openlab example :

       > cd build.m3/
       > make flash_test_leds

• if you want to reset the node : > make reset

That's it !

6 - If you have firmware with uart interaction (printf,..), you should use minicom or miniterm.py on our PC.

      > miniterm.py /dev/ttyON_M3 500000
      To quit Ctrl+]

  You can also use minicom :
 ``` 
    > minicom -s
    * Serial port setup (A) /dev/ttyON_M3
    * (E) 500 000
    * (F) Hardware Flow control NO
    * Modem and Dialing : (A & B = null)
 ```

7 - For debug :

    > cd build.m3/
    > make debug
    > arm-none-eabi-gdb bin/test_leds.elf
    >gdb
     Make the connection
    (gdb) target remote localhost:3333
     Launch the program
    (gdb) br main
     Continue
    (gdb) c
    Reset the program to be restarted
     (gdb) monitor reset halt