The FRM-xxxx boards from Freescale includes a minimal SWD based debugging interface for ARM Kinetis targets. The interface hardware is simple but flexible enough to be used with a wide range of Kinetis devices. The board includes provision for the connector necessary to allow programming of external devices as well as the target device on the board.
Unfortunately the existing debugger firmware available with the FRDM-xxxx boards is specifically tied to the target chip on the board (e.g. MKL25Z128M4). In fact, it is tied to the individual serial number of the chip on the board and cannot even be used to program other otherwise identical devices. Changing the chip on the board renders the debugging interface useless.
This manual describes a version of the USBDM firmware that can be loaded into the KL20 based debugging interface on any of the FRDM boards. This allows its use as a general purpose programmer and debugger for Kinetis devices (including the on board target chip e.g. KL25 on the board). This provides a very inexpensive debugging tool.
While the USBDM firmware may be used with any of the FRDM-xxxx boards it is recommended to use a FRDM-KL25Z or FRDM-K20D50M board as some of the early versions of the other boards have various hardware errors that make connection to an external device difficult. Another attractive choice is the FRDM-K64F. The advantage of this board is that it contains a controlled power supply and already has the required 10-pin connector present.
This version of the USBDM code combined with the FRDM-xxxx board provides the following features:
The capabilities and features of the USBDM interface varies between the different versions of hardware. Not all of the functionality described in the following pages may apply to this version.
Any queries please post on the Freescale OSBDM and TBDML Discussion Board.
Portions of this software is based on TBLCF software Portions of this software is based on OSBDM software Portions of this software is based on TBDML software USBDM Copyright (C) 2007-13 Peter O'Donoghue Opensource BDM (OSBDM) Copyright (C) ? Turbo BDM Light (TBDML) Copyright (C) 2005 Daniel Malik Turbo BDM Light ColdFire (TBLCF) Copyright (C) 2005 Daniel Malik This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA