System Workbench for STM32

Thanks a lot Dieter. It does work for 50Khz and lower frequency.

I want to read/measuer frequency upto 5Mhz. I tried to set up 180Mhz sys clock and APB1 90Mhz. i can read the inpucature concistenly upto 18Khz ..after that i is again inconsistent.
Could you please guide how could i measuer frequency upto 5Mhz and what should be the sys clock ? I think i cant go beyond 180Mhz with Nucleo F446Ze.

I have attached my clock configuration image

Thanks,
Ash