topic 512 vs 256 Compatibility in S12 / MagniV Microcontrollers

512 vs 256 Compatibility

lgs — Wed, 19 Jul 2006 04:06:21 GMT

I've been working with the A256 for a few years now, but we can't find them in stock anywhere, so we decided to try the DP512 in it's place. All of the documentation that I could find showed that this should be a drop in replacement. However, when I go to program the parts, the programmer says that it can't program block $C000. I am using Metrowerks version 3.1.

Anything obvious that I'm missing? Is the 512 a drop in replacement for the 256?

Re: 512 vs 256 Compatibility

CrasyCat — Wed, 19 Jul 2006 14:37:57 GMT

Hello

I assume you took the project you have initially created for a HC12DP256 and just changed the register definition file, rebuild the application and try to debug.

Am I right?

You probably have the wrong MCU encoded in your project .ini file.
Can you try to replace your .ini file (probably P&E.ini if you have created your project from a stationery) by the attached one.

Alternatively if you want to keep your configuration, try the following:
- Start the debugger
- After the message telling you "can't program the flash", select "ICD12" -> "Set MCU Type" and change MCU to HCS12DP512.

I hope this helps.

CrasyCat

Re: 512 vs 256 Compatibility

lgs — Wed, 19 Jul 2006 19:31:23 GMT

You are correct, at first I just changed the register definition file. Then I re-assembled the program and in the debugger I used the ICD12 menu command "Set Derivative" to change to 9S12DP512. It still wouldn't let me program the flash.

I usually don't use codewarrior except for the command line assembler and Hiwave debugger, so I thought that was my problem. I went into Codewarrior (ver 3.1) and opened the demo DP512 application that is targeted to the P&E debugger. Even that wouldn't program the DP512. I even tried making a new application using the wizard and didn't add any extra code. It was only 83 bytes or so and it wouldn't program either.

Assuming it might be an installation problem, I even tried two different Micros, and the circuit board was previously running a 256 version, so I know the board is good. Maybe I have a bad batch of micros or something?

I included a screenshot of the debugger in case that helps...

Re: 512 vs 256 Compatibility

CrasyCat — Wed, 19 Jul 2006 20:10:38 GMT

Hello

Then I would suggest you to submit a service request through our on-line support web site.

You need to get someone from our technical support to look at the issue.

Make sure to attach the failing project to the service request.

CrasyCat

Re: 512 vs 256 Compatibility

lgs — Wed, 19 Jul 2006 23:06:12 GMT

I sent in a request to Freescale Support. It turns out that the flash programming algorithms for the DP512 were incorrect for codewarrior 3.1 and 3.0. I replaced the files with the updated ones and it works fine. Thanks for your help!!