CodeWarrior for MCUのトピックRetargeting a project

Retargeting a project

Richly — Sat, 31 Mar 2012 03:13:54 GMT

I recall seeing demos showing how easy it is to retarget CW projects from one processor to another -- just a few clicks of the mouse, with minimal editing. However, I can't find instructions for doing this. Maybe I'm looking in the wrong places, or maybe I just imagined this.

I have a project that runs on the MC9S08SH16 but is running out of space, so I want to retarget it to the MC9S08SH32. Any help will be appreciated.

Thanks,

Richly

Re: Retargeting a project

BlackNight — Sat, 31 Mar 2012 10:57:14 GMT

Hello,

you can find the change wizard under the menu Project > Change Device/Connection.

Hope this helps,

Re: Retargeting a project

Richly — Sat, 31 Mar 2012 14:51:39 GMT

Thanks. I had stumbled across that once before and couldn't find it again. If you haven't selected the project, the menu item is greyed out, so I skipped over it many times.

After running the wizard, I got a whole bunch of undefined symbols. Looking at them, I think the problem is that all the floating point routines are missing. Any idea how to convince the newly targeted project to include (32-bit) floating point, which the original target successfully used?

Thanks,

Richly

Re: Retargeting a project

BlackNight — Sat, 31 Mar 2012 21:22:28 GMT

Hello,

You probably linking with a library with no floating point support.

Floating point support is basically done in two places:

- libraries: make sure you have the same library set up as in your previous project. They are in project > Properties > C/C++ Build > Settings > Linker > Input

- For no floating point support, there is a __NO_FLOAT__ define set. Remove it from project > Properties > C/C++ Build > Settings > Compiler > Preprocessor

Hope this helps,

Re: Retargeting a project

Richly — Mon, 02 Apr 2012 11:50:51 GMT

Many thanks for your excellent information! It solved the floating point problem. I really appreciate your laying out the steps to find the places to change. That made it quite easy.

I should probably two bug reports about retargeting:

(1) the failure to include floating point support

(2) the failure to use the altered values in the linker parameter file (project.prm). I had doubled the stack size and commented out the definition of VECTOR 0, and neither of these made it into the retargeted project.

Thanks again,

Richly

Re: Retargeting a project

Richly — Sat, 07 Apr 2012 05:37:09 GMT

Oops. Found another bug related to retargeting. I am using 32-bit floating point. The retargeting lost two flags: -TD2 and -Fd. I'm not totally sure how to generate both of these, but there are two more things I changed:

(1) project > Properties > C/C++ Build > Settings > HCS08 Compiler > Code Generation

I checked Use IEEE32 for double (default is IEEE64)

(2) project > Properties > C/C++ Build > Settings > HCS08 Compiler > Type Sizes

I selected IEEE32 for double.

These two changes seem to have fixed the problem more completely...but more testing may be necessary!

Cheers,

Richly

Re: Retargeting a project

Richly — Sat, 07 Apr 2012 09:34:21 GMT

Gosh...now another missing piece:

To prevent initialization of RAM at power on reset, the original project had the following definition in the compiler's options:

-D__ONLY_INIT_SP

This is missing in the retargeted project. The only way I could find to generate it was to go to

project > Properties > C/C++ Build > Settings > HCS08 Compiler > Preprocessor

and manually add

__ONLY_INIT_SP

Perhaps the last piece...now the before and after lists of compiler options match each other.

- Richly