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  • Abort some questions of arm interrupt

    Note: This was originally posted on 20th June 2008 at http://forums.arm.com

    I try to understand arm interrupt,there are some questions I don't know,
      1.   Why the nested interrupt has to switch out of irq mode to svc mode?  I think  it only pushes…

  • What is the top level difference in features between Cortex-M33 and Cortex-M4?

    This is a very common question.

    The diagram below is a pictorial description of the differences followed by some explanations.

    Cortex-M33 v Cortex-M4 features

    Starting from the bottom:

    • Cortex-M33 is an implementation of the ARMv8-M architecture. Full details are in my blog on the 5…

  • What is the top level difference in features between Cortex-M23 and Cortex-M0+?

    This is a very common question too.

    The diagram is a pictorial description of the differences followed by some explanations.

     

     

    Starting from the bottom:

     

    -Cortex-M23 is an implementation of the ARMv8-M architecture. Full details here.

    -Using the same debug…

  • NVIC and ARM asm

    Cannot configure interupts of TIM6 on stm32f103 board

    Does my NVIC configuration wrong?

    Code:

    @ stm32f103 timer & interrupt test by laper_s (from 2019-02-02)

.thumb
.cpu cortex-m3
.syntax unified

.word   0x20005000
.word   start + 1

b   start…