Modifying Softec HCS12 Starter kit

[JohnnyP]

Is there any reason that the $99 Softec HCS12 Starter kit could not be modified to work as an in circuit programmer?

Seems like you could just cut the Reset and BKGD traces to the onboard 9S12C32, and connect them to the target.

This question was asked by someone else on the Softec forum, but Softec's answer was to just buy one of their programming tools.

http://www.softecmicro.com/forum/showthread.php?s=&threadid=125

If this could be done, would it be necessary for the oscillator to run at 16MHz?

Also, where to get the "standard" 6 pin programming socket?

Thanks

[DanielM]

Hi,

I am sure this could be done - the board has no means of determining whether it is talking to the micro on the board or to another one somewhere else. Keep the connection wires short, as the circuits on the EVB are probably not designed to drive a long cable.

The crystal frequency may well be fixed in the SW of the EVB and/or the DLLs which talk to the debugger. You will have to try to change it to a different value and see what it does.

It is also possible that you will only be able to talk to the same part as on the EVB and the software could refuse to talk to any other S12.

But, why bother? You can build a BDM cable for $10...

Daniel

Message Edited by DanielM on 2006-10-26 08:12 AM