topic Re: S12Z weak function in CodeWarrior for MCU

S12Z weak function

francoisdugue — Mon, 20 Sep 2021 08:37:50 GMT

Hi,

I'm working with S12ZVL devices, and i try to use "weak" function attribute.

I don't find any clear statement (or example) on S12Z, that this attribute is available or not.

Can you help me on this subject?

Thanks in advance.

Re: S12Z weak function

StanoA — Wed, 22 Sep 2021 09:14:31 GMT

Hi Francois,

Sorry we haven’t code example for this attribute usage.

But the S12Z family of MCUs is supported by our CodeWarrior IDE (v11.1) and the “weak” attribute is supported also. You can see it in:

https://www.nxp.com/docs/en/reference-manual/CWMCUGCCCMPREF.pdf

on page 40.

The CW IDE 10.x is the predecessor of the CW IDE v11.1.

I hope it could help you in your task.

Best Regards,

Stano.

Re: S12Z weak function

francoisdugue — Wed, 22 Sep 2021 10:13:37 GMT

Hi,

Thank you for this answer.

As your link is about Kinetis devices (not the same tool chain) i'll do some tests.

I'll keep you informed.

Thank you

Re: S12Z weak function

StanoA — Wed, 22 Sep 2021 12:40:33 GMT

You are welcome.

Re: S12Z weak function

francoisdugue — Wed, 22 Sep 2021 16:27:06 GMT

Hi,

Unfortunately it doesn't work.

=extern bool_t bTask_1_Init(void) __attribute__((weak, alias("bNullInit"))); >illegal or unsupported __attribute__

Maybe i miss something. Do you have any idea?

Thank in advance.

Re: S12Z weak function

StanoA — Thu, 23 Sep 2021 08:40:09 GMT

Hi Francois,

I’m sorry that it don’t help you.

I made test for Kinetis MCU in the same CW IDE and it is supported. My understanding is this attribute is not supported by S12 Compiler. The ARM Kinetis use the GCC which supports this option. In case I take such suggestion how to solve it I will send you message.

Sorry I can’t help you more.

Best Regards,

Stano.

Re: S12Z weak function

francoisdugue — Thu, 23 Sep 2021 08:43:42 GMT

Hi,

So, we have the same conclusion.

S12Z toolchain doesn't support weak function attribute.

Thank you for your support.

Re: S12Z weak function

StanoA — Thu, 23 Sep 2021 08:47:28 GMT

Thank you for your answer.

You are welcome.

Stano.