• Shortest code for memory to memory transfer

    subin t
    subin t
    Note: This was originally posted on 16th March 2009 at http://forums.arm.com

    Hi All,
        Can anyone tell me what is the shortest code I can use for cortex M3 to transfer (a few words) from one memory location to other(without using the DMA).  It should…
    • over 7 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • What is the general purpose register number for LR in Cortex M3

    Umut Umut
    Umut Umut
    Note: This was originally posted on 25th March 2009 at http://forums.arm.com

    Note: Topic title is not valid. It should be "What is the general purpose register number for FP in Cortex M3"

    I would like to know which general purpose register is…
    • over 7 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Precise Memory Error

    Susan Davies
    Susan Davies
    Note: This was originally posted on 3rd August 2010 at http://forums.arm.com

    I am working with a Cortex-m3 using assembler and am getting "precise memory errors".  The manuals refer to this fault a lot, but don't actually explain what it IS and how to…
    • over 7 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Question : The Definitive Guide to the ARM Cortex-M3

    Kenichi Kenichi
    Kenichi Kenichi
    Note: This was originally posted on 11th December 2007 at http://forums.arm.com

    Dear, all.

    I am new in this forum.
    Recently I studying Cortex-M3 core, so I bought book "The Definitive Guide to the ARM Cortex-M3" by Joseph Yiu.
    This book is very…
    • over 7 years ago
    • Processors
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  • [CM3]UART always lose the last char

    stupidMokey
    stupidMokey

    Hi,there.

    I am using UART of my CM3 board,and there is something strange.

    I use minicom(a friendly serial communication program for linux) to Rx data came from CM3,and every thing goes well except that the last char is always lost. I have followed my program…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • migration from ARM to AVR

    Norman MediQ
    Norman MediQ

    I would like to know if there is any tool for migrating from ARM mcu's to Atmel? can any one help me on this topic?

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Cortex-M3 Hard Fault - find cause?!?!?!?

    Tim Borland
    Tim Borland

    Hello all,

    I'm new to the ARM platform and I'm having a problem discovering why my code is generating a Hard Fault.

    My hardware is an mbed platform board with the NXP LPC1768 processor.

    The code in question works when compiled using the mbed…

    • Answered
    • over 7 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Design Start ARM Cortex-M0

    vivek
    vivek

    Hi,

    I trying to build the peripheral around Cortex-M0 IP core thorugh AHB-lite system. Right now I have to integrate Cortex-M0 with the DDR2 SRAM (1Gb) through AHB lite.

    I searched on  internet which shows interfacing only through core generator (MIG…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • I want to know priority of Cortex-M3 processor

    kyujin
    kyujin

    which interrrupt priority is higher?

    systick vs IRQ(external timer)

    because In my case externl timer is higher then systick.

    I saw that during processing in systick ISR, but  suddenly pc jump to timer ISR

    so  I experimented print out. systick print letter…

    • Answered
    • over 7 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Cortex M4 vs Cortex A9

    Mohamed Jauhar
    Mohamed Jauhar
    Note: This was originally posted on 11th October 2012 at http://forums.arm.com

    What are the main difference between these two processors  

    • Answered
    • over 7 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • LPC2368 Watchdog Timer

    hemant
    hemant

    Hi,

    I am using LPC2368. It has pretty complex code running with 1 Timer interrupt (100uS continuous) , 2 UART interrupts, 1 SPI Interrupt, 1 USB interrupt and main loop.

    Watchdog timer is of 5 sec and is feed in main loop and in different places.

    System…

    • Answered
    • over 7 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • STM32F030 CORTEX M0

    Mark
    Mark

    I have initialized the above controller in C++ in Keil 5uV. After the initialization, I want to jump to or enter a timing critical assembly language algorithm under the int main(void) statement. What is the preferred method to accomplish this?

    MJ

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • floating point in cortex m0, always reset.

    willandsmith
    willandsmith

    hi,I write an algorithm running in cortex M0. It has some floating point multiplication.But the program always resets when encounter a floating point multiplication.And the code showed below:

        for (k = 0; k < 4; k++) { tmpx =   dbuffer[0] * a[k + 1…
    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Cortex M3 - Conditions for IT folding

    Remi DUCLOS
    Remi DUCLOS

    Hi folks,

    Some weeks ago, I discover the mechanism of IT instruction folding supported by the cortex-M3.

    As mentionned in 'Cortex-M3 Devices Generic User Guide', "In some situations, the processor can start executing the first instruction in an IT block…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • what is difference between Arm7 and Arm cortex-m series??

    chandan
    chandan

    what is difference between Arm7 and Arm cortex-m series??

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Suggestion on suitable arm processor

    Ma Seet Ting
    Ma Seet Ting

    Hi all. Nice to meet you all and glad that I have a chance to join this group=)
    Recently, I will do my final year project with the title of "Smart Home Control Using Brain Wave". Yet, I am not really sure on which arm that I should choose><…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Concurrent Interrupts

    Michael
    Michael

    Hi All,

    Im new to the Arm Community and Arm processors (newbie), and my question is as follows: Atmel ATSAMD20e  implements ARM cortex M0+ processor based on ARMv6 architecture. It allows upto 32 external interrupts, with the interrupt signals connected…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Question on clock gating for AHB -lite bus matrix for CM4 based system

    Dhaval
    Dhaval

    Joseph,

    We are using CM4 and AHB -lite bus components from ARM system development kit. We have 3 different AHB masters in the system, including CM4.

    I am wondering if we could use HTRANS from each master and combined that information to gate the AHB-lite…

    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • clock configuration of xmc4100

    harshan
    harshan

    Greetings,

                   sir/madam i am working on xmc4100 after reading the reference manual i am tried to configure the clock (CCU) which was present under system control unit (SCU…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Cortex-M3: Are "Errata Notice" and "Software developers Errata Notice" the same?

    J K
    J K

    Im wondering if these documents are different types:

    1. Errat Notice, PR141-PRDC-007452, v9.0, 2008

    2. Software developers Errata Notice, ARM-EPM-039114, v2.0, 2014

    From my point of view, these documents are the "same" (of course in another revision).…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • How to put codes into ITCM?

    Yasuhiko Koumoto
    Yasuhiko Koumoto

    Hello experts,


    I have a question how to put instruction codes into ITCM?
    I have only one experience of ITCM by STM32F7 based on Cortex-M7.
    In the STM32F7 case, there is no path to write codes into ITCM from CPU.
    Codes in the flash memory seem to be put automatically…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • LPC1768 - Network-on-Chip

    Apple Ong
    Apple Ong

    Hi, im new to ARM mbed. Im using LPC 1768. Anyone know is it suitable apply in network-on-chip project? if no which platform is more suitable. What type of network-on-project i can do. Any suggestion.

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • Question about bit-banding for Tiva M4 core

    Robert
    Robert

    Hi,

    I read example projects of Tiva-C 1294. There are many similar uses '    GPIOPinWrite(GPIO_PORTH_BASE, GPIO_PIN_2, GPIO_PIN_2);'

    The prototype is :

    extern void GPIOPinWrite(uint32_t ui32Port, uint8_t ui8Pins, uint8_t ui8Val)…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • TFT RGB Problem

    Dejan
    Dejan

    Hi,

    I'm currently an probetion for an electronics system development company and they gave me LPC1788 and Topway LMT057DCDFWU-NBA to work with. I don`t have mentor or any kind of help. I don`t have any example.

    I'm also very new to programming therefore…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-M / M-Profile forum
  • M4/M0 dual core application. M0 fails to start

    Bo Mellberg
    Bo Mellberg

    Hello everyone,

    I have an LPC4337 running uCLinux. I'm trying to get code to run in the M0 in parallell.

    I load the code to 0x10080000, set the M0APPMEMMAP to 0x10080000, release the M0APP Reset and nothing happens. I have to reset the M0-core using…

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