• what situation will the FPCA in Cortex-M4 change?
    Hi all, I'm study Cortex-M4 recently, and try to use floating point calculation, I read the book about that saying FPCA in control register will be set 1 after FPU work, but I'm not sure that when...
  • What is better as mutex on Cortex-M4 - Bitband or LDREX/STREX
    The two options are available. What is the difference in respect of "cost" "speed" and "complexity" for the two method? When we need more than few mutexs like that, say 100, is the answer different?
  • Example of instructions, doesn't use functional unit at all?
    Hello to all, I need a small help with the processor instructions. Can anybody provide me an example where during execution, the functional unit must not be used or it must be deactivated? All data...
  • What's happening if NMI is active (via a push-button) during µC (Cortex M4) start-up (power on)?
    Hi everyone, I need help about NMI that seems to freeze mu µC during power on. I use a cortex M4 ( K64 from NXP/Freescale ). On the board I use, the NMI is connected to a push button. If I don't...
  • Assembly example for programming ARM Cortex-M4
    I am using a CORTEX-M4 micro controller board. Could you send me an Assembly example for programming the board?