How can I force a Usage (instruction) exception in cortex m4

I want to test all my exception handlers; but have so far failed miserably at forcing a usage exception. I tried disabling FPU and running a FPU instruction, but this resulted in HARD Fault rather...
file compression with cortex M4

Hi I'm using a kinetis K64 cortex M4 with FreeRTOS and I need to compress files on a SD card. I have 100-150ko free Ram. Do you know a library for this ? I found only solutions with 1Mo minimum RAM requirement...
ECG, Wavelets and Cortex-M4

Hello First of all a successful 2017 for all of us. I'm looking for examples of C algorithms for applying the concept of wavelets to identify ECG patterns in data collected with a Cortex-M4, preprocessed...
ARM cortex M4

Which Linux version used for ARM cortex M4 ?? and how to install this linux version on TDA3x from Texas instruments ??
How to use CCM SRAM for Cortex-M4?

How to compile in gcc 4.9.3 for CCM SRAM usage?