The interface MCU features a
Mass Storage Device (MSD). This makes the Development Kit (DK) appear as an external drive on
your computer.
This drive can be used for drag-and-drop programming. However, files cannot be stored on this drive. By copying a HEX file to the drive, the interface MCU programs the file to the device.
Note:
- Windows might try to defragment the MSD part of the interface MCU. If this happens, the interface MCU disconnects and becomes unresponsive. To return to normal operation, the DK must be power cycled.
- Your antivirus software might try to scan the MSD part of the interface MCU. Some antivirus programs trigger a false positive alert in one of the files and quarantine the unit. If this happens, the interface MCU becomes unresponsive.
- If the computer is set up to boot from USB, it can try to boot from the DK if the DK is connected during boot. This can be avoided by unplugging the DK before a computer restart, or changing the boot sequence of the computer.
You can also disable the MSD of the kit by using the msddisable command in J-Link Commander. To enable, use the msdenable command. These commands take effect after a power cycle of the DK and stay this way until changed again.