Dragon12-Light Board:

Download Dragon12-Light software and documentation
Extract the zip file to any folder. For the simplicity, you can extract it into C:\

The c:\Dragon12_Light\asmchanges.txt is an important file to read and it covers the history of AsmIDE’s upgrades.
The user's manual can be found in c:\Dragon12_Light\document.

The software tool AsmIDE including the assembler (AS12.exe) is used with Freescale D-Bug12 monitor. All sample programs are tested under the D-Bug12 monitor.  If you plan to use the CodeWarrior IDE with Freescale serial monitor, or you have been using the MiniIDE, you can ignore the AsmIDE and AS12.exe, but all sample programs can run under the MiniIDE or can be converted to run under the CodeWarrior. 

Verify the type of monitor firmware on your Dragon12-Light board:

  1. Apply power to your Dragon12-Light board either by an AC adapter or a USB cable.  The board will automatically select the power source.
     

  2. Observe the 8 port B LED indicators. 
     

  3. If your board is pre-installed with Freescale D-Bug12 monitor firmware, the 8 port B LED indicators will light up from left to right and the speaker will chirp once when the board is powered up. If the chirp is too soft you can remove the label sticker on the speaker to increase volume.
     

  4. If you ordered the board with Freescale serial monitor firmware for the CodeWarrior, it would be pre-installed with the serial monitor and a factory test program. The state of the left switch of the 2-position DIP switch (SW7) is tested by the serial monitor for selecting RUN or LOAD mode during power up or reset, and the 8 port B LED indicators will light up from right to left and the speaker will chirp once to indicate that the serial monitor firmware is functioning.
    For more information please see this video:  http://www.youtube.com/watch?v=gmwBMWII0p8&feature=related

    If the left switch is placed in the "LOAD" mode (in the "low" position) the monitor will wait for a command from the host PC.
    If the left switch is placed in the "RUN" mode (in the "up" position) the 8 port B LED indicators will light up again from left to right to indicate that the program execution is diverted to the user code.

    The CodeWarrior communicates with Freescale serial monitor firmware only in LOAD mode and so in order to interface with the CodeWarrior you have to place the left switch in the “low “ position. The 8 port B LED indicators will light up from right to left and the speaker will chirp once when the board is powered up.

    If your board does not communicate with CodeWarrior, the first thing you should check is that if the left DIP switch of the SW7 is in the LOAD mode ( in the "low" position).
     

  5. If the Freescale monitor firmware is not installed or is erased by a BDM, the 8 port B LED indicators will not light up sequentially during power up or reset.

The Dragon12-Light board comes with a built-in USB interface based on the FT231XS. The driver for the FT231XS will be installed automatically by Win 7 and Win 8.1.

Verify USB driver:

  1. Before connecting the Dragon12-Light board to your PC's USB port for the first time, make sure that the AC adapter is unplugged. You do not need the AC adapter since the board can be powered by a USB port.
     

  2. Go to the FT232RL driver verification page for operating procedures: http://www.evbplus.com/TinyUSB_9s12/ft232rl.html.  The FT231XS driver verification is the same.
     

  3. Once you have verified that the USB driver is properly installed, you may invoke the IDE (CodeWarrior or AsmIDE).
     

  4. If you are going to use CodeWarrior IDE and have not installed it you need to Download and configure CodeWarrior
    http://www.evbplus.com/Code_Warrior_hcs12.html
     

  5. If the AsmIDE does not communicate with your Dragon12-Light board then you need to check if the COM port number that is assigned by the AsmIDE matches the USB-to-Serial COM port number that is assigned by Windows' Device Manager. The Device Manager assigns the USB-to-Serial COM port number randomly and it does not know which COM port number that AsmIDE is going to use.

    In order to find the USB-to-Serial COM port number that is assigned by Device Manager, you can click through "Control Panel -> Systems -> Hardware -> Device Manager -> Ports".  The USB-to-Serial COM port number will appear.

    For setting the COM port of the AsmIDE to match that USB-to-Serial COM port number, you can click through "View-> Option->Terminal Window Options" menu, then select the correct COM port from COM1 to COM4.

In order to establish a reliable USB communication, always connect the Dragon12-Light board to your PC's USB port first before invoking the IDE (CodeWarrior or AsmIDE), otherwise the IDE may not be able to communicate with the Dragon board. During a debugging session, if you accidentally unplug the USB cable from the Dragon board, you need to re-establish the USB communication. The IDE will not recognize the Dragon board again if you just simply plug back the USB cable

To re-establish the USB communication you need to exit the IDE, then re-invoke it to re-establish its communication with the Dragon board. If this does not work, you need to restart your PC. If the restart does not solve the problem, the board may be defective or the D

-Bug12 monitor may be corrupted.

 

Download the MC9S12DG256 Device User Guide

http://www.datasheetcatalog.org/datasheet/motorola/9S12DT256DGV3.pdf

Download the D-Bug12 Reference Guide, DB12RG4.pdf
http://eecs.vanderbilt.edu/courses/ee276/Fall2006_downloads/Doc/DB12RG4.pdf

Download the AN2548.pdf (serial monitor)
http://www.freescale.com/files/microcontrollers/doc/app_note/AN2548.pdf

Download the AN2153.pdf (serial bootloader)
http://www.freescale.com/files/microcontrollers/doc/app_note/AN2153.pdf