• Problem: WFI instruction slowing down SYStick interrupt
    I've configured my Infineon relax kit for max frequency(120 MHz). I've set my SYSTick for a periodic interrupt of 10 ms. For power saving, I use a WFI assembler instruction whenever my processor is idle...
  • wfi in debug mode
    Hi, Please help me understand expected behavior of CM4 when CM4 is in debug mode and WFI is executed through single step. Does CM4 enter sleep/sleepdeep in such case ? Thanks, Sandeep
  • Cortex-M4: guaranteed wakeup from WFI?
    Note: This was originally posted on 8th August 2013 at http://forums.arm.com Hi all! I'm wondering how to ensure that the Cortex-M4 is always woken up on an interrupt from the WFI instruction when executing...
  • A panic function to halt the processor in low-power sleep using WFI?
    As part of fault detection / debugging, it's useful to have a panic() function that halts the processor. It is easy enough to disable interrupts and put the processor in an infinite busy loop (while...
  • Interruptible-restartable instructions and Others
    Hi, As I have found in: Cortex-M0+ Devices Generic User Guide: 2.1.3. Core registers There is information about instruction behaviour during interrupts: "Interruptible-restartable instructions The interruptible...