mcuxpresso and mkv58 full code and interrupt from ITCM/DTCM

thieulam — Sat, 19 Mar 2022 16:38:07 GMT

Hello everybody. I wanted to know if there is a document on how to set mcuxpresso options to be able to run my main () code and all interrupts directly from TCM RAM. I don't find any documentation about it, and I didn't understand if you need a particular bootloader or something else. Thanks, see you soon!

Re: mcuxpresso and mkv58 full code and interrupt from ITCM/DTCM

thieulam — Sun, 20 Mar 2022 11:27:21 GMT

Ok, I partially solved this topic:
https://community.nxp.com/t5/Kinetis-Design-Studio-Knowledge/Relocating-Code-and-Data-Using-the-MCUXpresso-IDE/ta-p/1103719

I come from a decennial experience of DSPIC33 (microchip) and at the moment I am studying the cortex M7.
I am really impressed with their performance.
Putting the functions in ram I was able to do several floating point operations (see code) in just 69 clock strokes (systick).

a + = ka;
b- = kb;
c * = kc;
r = a / b + c / a;
arm_sqrt_f32 (a, (float32_t *) & r2);

In practice, working at 240Mhz, these calculations are done in 288nSEC !!

topic mcuxpresso and mkv58 full code and interrupt from ITCM/DTCM in Kinetis Microcontrollers

mcuxpresso and mkv58 full code and interrupt from ITCM/DTCM

Re: mcuxpresso and mkv58 full code and interrupt from ITCM/DTCM