S32K146+LPSPI+FREERTOS run time

[carolineliu_wiw]

Hi, everyone!

I 'm using S32K146. My LPSPI communication is under FreeRTOS operating system. When I download my project to the chip, the Run Time in FreeRTOS Task List shows that my lpspi Task is 0%. But I put it in the c / c ++ project, the Run Time became 10.6%, the code of two project files are the same, but why is there such a big difference in Run Time?

Can anyone help?

IDE: S32 Design Studio for ARM v3.0.0

Here is in c Project:

Here is in c/c++ project:

Thanks!

[Alexis_A]

Hello carolineliu_wiw@163.com‌,

I think this could be due to the optimizations in your C project, could you try disabling it? You can do this in the project properties:

Let me know if this helps you.

Best Regards,

Alexis Andalon 

[carolineliu_wiw]

Hi,Alexis Andalon!

Thanks for your reply!  You are right. when i disable the optimization in C project, the run time becomes 10.6%, same as in C/C++ project. 

Liu