Reprogramming of DC2N with TeraTerm

As Windows advances and old terminal programs such as Hyperterminal are not available anymore, I thought to provide a guide on how to update the DC2N firmware on the legacy device, where updates are done via serial port.

The download page for TeraTerm is: http://en.sourceforge.jp/projects/ttssh2/releases/

Once downloaded and started, select serial port and pick up the COM port you will connect DC2N to:

Configuring TeraTerm for DC2N connection by Luigi Di Fraia

Configuring TeraTerm for DC2N connection

From the “Setup” menu select “General…” and configure the Language as needed. E.g.:

Configuring TeraTerm for DC2N connection by Luigi Di Fraia

Configuring TeraTerm for DC2N connection

From the “Setup” menu select “Serial Port…” and configure as per below (it is very important that you don’t forget to set the line delay to 250 ms):

Configuring TeraTerm for DC2N connection by Luigi Di Fraia

Configuring TeraTerm for DC2N connection

At this point you might want to choose the “Save setup…” option under the “Setup” menu and save the above configuration to file for future uses. E.g.:

Configuring TeraTerm for DC2N connection by Luigi Di Fraia

Configuring TeraTerm for DC2N connection

You are done for what concerns the software. Now remove the bootloader jumper of your DC2N, connect it to the COM port via a straight serial cable and power DC2N up. The “>” prompt will be shown. Press “f” on your PC keyboard to start flashing:

Updating the DC2N firmware by Luigi Di Fraia

Updating the DC2N firmware

Now from the “File” menu, select “Send file…” and open the firmware update file you were provided (it’s a txt file). During the upload you will be able to see the progress as per below:

Updating the DC2N firmware by Luigi Di Fraia

Updating the DC2N firmware

Once finished, you will see an “OK” reply:

Updating the DC2N firmware by Luigi Di Fraia

Updating the DC2N firmware

If anything other than the “OK” message is displayed, repeat the steps from pressing “f” onwards.

That’s done! Power DC2N off, put the jumper back and you are ready to use your updated DC2N!

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