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  • What is the meaning of a 64 bit aligned stack pointer address?

    According to ARM Architecture Procedure Call Standard (AAPCS) on the ARMv6-M, and ARMv7-M architecture in  it says:

    "Although the processor hardware allows SP to be at any word aligned address at function boundaries, standard programming practice…

  • cmsis NVIC question.

    Hello, Everybody. I have several questions.

    1. Please See the NVIC_Type structure. I don't understand about why ISER,ICER,ISPR and ICPR use size of array 1( I think It can use just __IO uint32_t ISER; ), and what does RESERVEDs do???

    2. I would like…