• Cortex-M4 setup vector table for external interrupts

    I don't want to setup the vector table for all my external interrupts. For instance I only need the timer4 IRQhandler at IRQn 30. How can I make an offset in the table? Is this necessary?

  • WFI Instruction

    Hi,

    I want to use the wfi instruction in my code. I'm sending a command to a module and wait for the reply.

    I have configured UART communication with the module. Will it be good to use wfi() instruction? I know that it will turn  the cpu to power down…

  • Wake-up time from WFI

    How long does it take to wake up from from WFI once an interrupt occurs? 

    What system parameters does the answer depend on?

    What's turned off in the CPU (and elsewhere) while WFI is underway?

    I'm using NXP i.MXRT1050 (Cortex M7) and I'm experiencing…