• real time digital signal processing and its performance analysis

    Xingjun
    Xingjun

    Hi, Everyone.

    I am working a on project that requires the use of LM3S8962 evaluation board and keil uvision compiler.

    I need to program fft in c algorithm and allow my micro-controller board to process it.

    I have the fft algorithm. I not too sure my fft…

    • Answered
    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Cortex M3 peripheral Bit Banding limit?

    H van Rooyen
    H van Rooyen

    Is there an intrinsic limit to the width of the bit banding for peripherals for the

    Cortex M3?

    EFM32 Giant Gecko seems to have a limit of eight bits - bits 8 to 31 does not seem to work.

    Is this normal?

    • Answered
    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • about tail chaning of Cortex-M0

    下田敏郎
    下田敏郎

    Hello.

    I'm studying about the tail chaining of Cortex-M0.

    Is it same as Cortex-M3 or M4?

    Best regards.

    • Answered
    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • cmsis NVIC question.

    Setianian
    Setianian

    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…

    • Answered
    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • I have an Arm 32-bit Cortex V3.10, Does anyone know the manufacturer/email?

    jeff
    jeff

    I need a configuration to get rid of the spacing between the numbers in a single barcode.

    • Answered
    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Is ARMv7-M3 thumb instructions compatible to ARMv7-A thumb?

    Kaiyuan
    Kaiyuan

    Hello guys,

    I am trying to verify some features of ARMv7-M3 in a software simulator platform for ARM. But this simulator only support ARMv7-A ISA.

    Is ARMv7-M3 instructions compatible to ARMv7-A, especially thumb instructions?

    Thank you very much.

    • Answered
    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Race condition between wake up event and WFI on Cortex-M3/M4

    neo
    neo

    When I read below thread in arm forum, I still not clear which one is the safety way.

    Cortex-M4: guaranteed wakeup from WFI?

    There're two solutions mentioned above, using WFE instead of WFI, and swap __WFI() and __enable_irq().

    I can understand WFE…

    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • in arm7tdmi, when FIQ and RIQ occures at same time so how both are executed sequentially,first FIQ and thenIRQ?

    nirav
    nirav

    in arm7tdmi, suppose instruction is being executed and at same time FIQ and IRQ both occur  at same time.now according to priority FIQ will be handled then IRQ  but my question is that how it will handled IRQ after  return from FIQ

    i means…

    • Answered
    • over 4 years ago
    • Processors
    • Classic processors forum
  • maximum level of functions than can be called within

    NABEEN LAL AMATYA
    NABEEN LAL AMATYA

    function1 calling function2, function2 calling function3, function3 calling function4 and so on.

    Maximum stage depends upon Stack Size, right? How to identify Stack Size and if required how to change it? I am using IAR and Fujitsu ARM Cortex M3 MB9AF312K…

    • over 4 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • I am very new to ARM, still understanding the terminologies. What is the difference b/w the Cortex family and the x-gene?

    Moix
    Moix

    Where can i get a list of all these family of ARM processors and their differences

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Real Value of PC Register.

    Carlos Delfino
    Carlos Delfino

    I've been reading books on the ARM Cortex-M architecture and as already mentioned in other post, all the books are consistent in saying that the PC points four bytes (Thumb Instruction Set) forward due to Pipeline (prefetch).

    Did some testing with…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • How long bitfields on which ARM?

    Øyvind Teig
    Øyvind Teig

    I need to be able to handle long bitfields as effectively as possible. Right now I need up to 64 bits in length.

    Are there instructions to set, clear and test individual bits in one cycle available for some of the architectures? Which? Particularly, will…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Cortex-A8 performance

    rlepage
    rlepage

    I'm working an a project on a Texas Instruments AM3517 Cortex-A8 processor. I was seeing less than expected performance, and did a simple comparison with a Cortex-M3 processor. The M3 performance was more than twice as good as the A8(?!).

    The test…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Help me jump into ARM world !(I know nothing but AVR)

    kamran
    kamran

    Hi,  Sorry if this is a long thread but i'm really confused.

    I program for AVR MCUs and also know about Arduino, I can program for different ATMEL MCUs with looking at datasheets, And i also programmed a few basic stuff on Cortex-M3 LPC1768, without…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • If CAN receive buffer is'nt cleared before a new message arrives,will it over-write the earlier data?

    Akshay Immanuel
    Akshay Immanuel

    I am writing an application where a number of devices send messages to a common CAN processor in LPC1778 via CAN bus.

    FYI-i dont need to use Acceptance Filter because all messages have to be allowed.

    My question is that,if Device A sends a message and after…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • ARM Cortex M3 STM32F207 processor hangs during the initializing if the code-size is more then 64k

    Stefan Tesche
    Stefan Tesche

    Hallo,

    I'm using a ARM Cortex M3 STM32F207 processor and if the code of  my project becomes a value of more than 64k, the processor hangs before the PC reach the __main().

    The code starts at 0x08020000 (sector 5) and hangs at a Breakpoint or any…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Break Points and Watch Points

    harshan
    harshan

    Greetings,

                   Sir,i am working on SWD, after  Research on Break Point & Watch Point i found One Thing That There are Some Comparators will Do These Things but I am not Very Sure That How These are Work …

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • How to learn ARM

    Amey Chaware
    Amey Chaware

    Hi everyone!!

    I am looking to work on some projects using ARM. I have completed a basic course on ARM M3/M4 (UT Austin 6.01x by Jon Valvano and Ramesh Yerraballi) online. Now, I want to learn advanced things, especially real-time applications. How should…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Continue the Target using Serial Wire Debug Protocol

    harshan
    harshan

    Greetings,
                   sir, i am working on serial wire debug protocol and till now i succeeded in halt,write,erase,and reset the target. now i am trying to implement breakpoints and watch points on my custom debugger. for break point i read "the definitive…

    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • [CM3]which clock sources can be closed?

    stupidMokey
    stupidMokey

    Hi bro,I am wondering which clock sources can be closed by software within stm32?thanks for helps.

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • stm32f103c8t6 "blue pill" board

    mike kilo
    mike kilo

    Hi,

    I am new to ARM cortex and have started with a m3 board stm32f103c8t6 using a St link v2 usb device and Stm32cubemx . 

    To begin with the IDE used was Keil 5 and everything went ok first shot. I had the on board led blinking within minutes.

    Then just…

    • Answered
    • over 1 year ago
    • Processors
    • Cortex-M / M-Profile forum
  • setting breakpoint from code

    franto
    franto

    Hi, my app (cortex m3) needs to set up a breakpoint directly from code, in order to jump to an interrupt when an instruction from a certain address is fetched. This WITHOUT using a debugger.

    Any hint or tutorial? I think the only possible way is the patch…

    • Answered
    • over 1 year ago
    • Processors
    • Cortex-M / M-Profile forum
  • CMSIS FFT

    jay shah
    jay shah

    Hi All, My Question is related to CMSIS DSP Library. i'm working on ADuCM3029 EZ-KIT. I'm using IAR v7.8.1 to build the project. In my application i have an ADC interfaced with the controller, from which i acquire 60 samples and stores it into the buffer…

    • over 3 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Arm Instruction Set (Thumb-2)

    AbdAllah Talaat
    AbdAllah Talaat

    Hi , I am New to this Community

    I am Studying now Cortex-M3 .. I am reading Joseph Yiu book...

    I am Confused in the part of the instruction set , and I couldn't get the following:

    as i understand that some of the original ARM 32-bit instructions are…

    • Answered
    • over 3 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Where to find the execution cycles of Cortex m7 instruction

    tyskin
    tyskin

    for Cortex-M0, M3 and M4, I can find the execution time in their Technical Reference Manual > Programmers Model > Instruction set summary 里面查看

    http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0432c/CHDCICDF.html

    but for M7 It said that…

    • over 3 years ago
    • Processors
    • Cortex-M / M-Profile forum
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