Can the S12 family be used in the FFT calculation

[freudstein]

hello everybody,

I need to use FFT calculation in an automotive project and I was wondering if I can use one of the S12 family microcontroller.

and if yes, where can I find the FFT library ?

Thank you in advance for your help.

[iggi]

Hi,

We do not have any specific portable public implementation of the FFT. However... If you are looking for the theory behind the FFT please check out these Application Notes (search on FSL web):

AN2768 - Implementation of a 128-Point FFT on the MRC6011 Device

AN4255 - FFT-Based Algorithm for Metering Applications

When using a device like the HCS12 to implement such a heavy calculation you must consider that performance is critical to the application. The multiply instruction of the HCS12, along with the pointer registers could allow you to write an assembly function that performs fairly well with the FFT.

Regards,

iggi