• Cortex M4 (LPC4370): how do I detect ADC threshold crossing while moving data in a DMA driven double buffer?

    Andrea Bettati
    Andrea Bettati

    Hi to you all,

    I'm currently working on a project involving the LPC-Link2 as a eval. board for it's LPC4370 (for a complete explanation see this question).
    What I'm trying to do is:

    • Continuously sample external analog signal (using on-board…
    • Answered
    • over 3 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Interrupt on Out-of-Order pipeline of Cortex-A15

    Michihiro Yamamoto
    Michihiro Yamamoto

    Hi,

    I would like to know the interrupt behavior on Out-of-Order pipeline on Cortex-A15.

    When some instruction is executing on Out-of-Order pipeline, one interrupt is happens.

    In this case, its interrupt must wait until finish the current executing instruction…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Exception / Interrupt for Cortex-A15

    Michihiro Yamamoto
    Michihiro Yamamoto

    Hi,

    I would like to know whether my understanding is right or not regarding to the interrupt (exception).

    When an interrupt is issued, the interrupt is executed at once without the completeion of the executing instrructions.

    And, the contents of the result…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • ARM Cortex-R4F Re-entrant Example

    Taylor Hillegeist
    Taylor Hillegeist

    I was reading a post regarding re-entrant interrupts where you said:

    Re: Is there ANY Cortex core that supports reentrant interrupts?


    Hi Marcus, Cortex-R and Cortex-A processors does not have NVIC. Users (SoC designers) using these processors can use…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • LDM/STM interruption of Cortex-M7.

    Yasuhiko Koumoto
    Yasuhiko Koumoto

    Hi Cortex-M7 specialists.

    I would like to know the Cortex-M7 behaviors when requested interrupts.
    In the Cortex-M3 case, LDM/STM and DIV will stop execution by interrupt requests (although those can be prohibited by An Auxiliary Control Register).
    In the…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • ARM Cortex A8 - if IRQ interrupts are disabled in CPSR register While the processor is executing, system results in data abort. What might be the reason to trigger data abort

    Manyam
    Manyam

    ARM Cortex A8 - if IRQ interrupts are disabled in CPSR register While the processor is executing, system results in data abort. What might be the reason to trigger data abort

    cpsid i;          // instruction used to disable the IRQ…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • What happens if an interrupt occurs as it is already disabled

    Manyam
    Manyam

    for ARMv7 architecture:What happens if an interrupt occurs as it is already disabled

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Can a Linux kernel run as a TrustZone secure OS?

    Hendy
    Hendy

    I have a samsung exynos 4412(Cortex-A9) development board. There is a simple secure os that can run on it. The normal os is Android. Now I am trying to select linux as the secure os.  The linux kernel is from the Android OS for the development board.…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • How many interruptions the pendent queue supports?

    Carlos Delfino
    Carlos Delfino

    The queue for the processors interrupt context-m supports how many pending interruptions?

    Complementing please send me information where I can read more details about it.

    Thank you.

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Cortex-M4 interrupt priority dynamically change while in ISR

    Adnan Ashraf
    Adnan Ashraf

    Hello,

    I am using STM32F407ZGT6 Cortex-M4 microcontroller. I am interested in changing the priority of a certain interrupt while servicing the same interrupt. Is that possible?

    More elaborately, lets say I have an interrupt which has a priority of 4. The…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Cortex-M4 interrupts behaviour when same interrupt vector has multiple interrupts

    Adnan Ashraf
    Adnan Ashraf

    Hello,


    I am using STM32F407ZGT6 Cortex-M4 microcontroller. This controller has same interrupt vector for 5 external interrupts i.e., NVIC (EXTI9_5) for EXTI5, EXTI6, EXTI7, EXTI8 and EXTI9 interrupts. They all have the same ISR EXTI9_5_IRQHandler interrupt…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Using interrupts not implemented as Software interrupts?

    Carlos Delfino
    Carlos Delfino

    We know that a Cortex-M0 or any other Cortex-M may have fewer interruptions implemented the architecture defined in the standard, so we can not use interrupts implemented as software interrupts by manipulating the registers SETENA / ClrEnable and SetPend…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Need to know how to catch a signal interruption of the gpio on a beaglebone ?

    Jerome Decamps - 杜尚杰
    Jerome Decamps - 杜尚杰

    Hello,

    I search the good way to catch a signal interruption of the gpio on a beaglebone

    I have read a lot of sample about it but none seem work correctly,

    is there somebody to explain me how to do this in a #C or python

    code ?

    Thanks for your help

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Enable Reentrant interrupt handlers in kinetis K70

    maurizio
    maurizio

    I have a TWR-K70F120M: kinetis k70 120MHz Tower System Module.

    I have connected a elettric signal to PORTB and i have connected e isr handler to signal transition.

    Electric signal

         _____          ______          ______…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Programmable Interrupt Controllers: A New Architecture

    Eoin McCann
    Eoin McCann

    A programmable interrupt controller is an IP block that collates many sources of interrupt one one or more CPU lines, as well as submitting a level of priority to the interrupt outputs. It’s fair to say that almost every SoC needs an interrupt controller…

    • over 5 years ago
    • Processors
    • Processors blog
  • Critical interrupts

    Michael Williams
    Michael Williams

    In software there are often cases where you need to have critical interrupts serviced. For example, for:

    • Code profiling
    • Kernel debugging
    • Watchdog handling
    • Error handling.

    With the ARMv7-M architecture this can be achieved using nested interrupt handlers, but…

    • over 6 years ago
    • Processors
    • Processors blog
  • Processor IP Vendor Selection Checklist

    Diya Soubra
    Diya Soubra

    Abstract

    The complex task of selecting which processor core to license can be simplified by using a standard check list approach to evaluate all relevant criteria. This white paper goes through such a check list in full details to demonstrate the process…

    • over 7 years ago
    • Processors
    • Processors blog
  • Optimizing a processor design for low power control applications

    Joseph Yiu
    Joseph Yiu

    ARM Cortex-M based microcontrollers are becoming the defacto standard for the next generation of low power control applications.This paper looks at the various criteria to be considered when selecting a processor for low power control applications, and…

    • Optimizing a processor design for low power control applications.pdf
    • over 7 years ago
    • Processors
    • Processors blog
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