• ARM CFFT Peak Velocity from Acceleration data

                   Hello guys,

          I am using an NRF chip with Cortex M4. Currently I am reading data from an accelerometer (12 signed bit ADC) and I have to get peak velocity. For that I am using the Omega arithmetic algorithm, as follows:

             - remove offset from…

  • Handling invalid AXI address requests

    I'm working with the Cortex-M on digilent ARTY FPGA platform. I'm wondering how handling invalid address requests happen on a typical system. I'm guessing the address decoder in the AXI crossbar interconnect handles it somehow. Does it return an error…

  • Bus Matrix

    Note: This was originally posted on 28th January 2009 at http://forums.arm.com

    What exactly is a bus matrix? I came across the term in ARM cortex M3 specs but couldnt find any proper description. Can someone help?

  • ARM Cortex ICode, DCode, System buses

    Note: This was originally posted on 26th February 2009 at http://forums.arm.com

    I'm a bit confused about the bus structure and memory model of ARM Cortex M3. First of all, does Cortex M3 actually have 3 physically separate buses coming out of it?
    …

  • LCD interfacing with ARM cortex M0+ lpc845

    Hi,

     

    I'm trying to interface 8x2 lcd using parallel interfacing[4 bit mode], Display used - 8x2 lcd [PC 0802--A] ST7066U--Dot Matrix LCD Controller/Driver

    Since I'm trying to interface using GPIO pins, not using I2C or SPI interface, and since no…

  • If an RTOS is able to run on one particular implementation of a CPU core, does it necessarily support other implementations of that core?

    Hi Matt- If an RTOS is able to run on one particular implementation of a CPU core, such as a Cortex-M3, does it necessarily support other implementations of that core?

  • IDE Recommendation

    Not sure if this is the right place for this or not, so excuse me if I have not "chosen wisely."

    I'm a hobbyist working on a project that I MAY productize and try to sell. I have begun with the mbed platform of embedded boards. However I have…

  • HardFault on UART initialize

    Hi all!

    I'm facing a problem with my UART on a STM32F207IG under CMSIS.

    When I try to initialize the UART the processor disappears in the HardFault_Handler.

    I think the problem is somehow related to the clock settings which I left untouched until now…

  • two microcontrollers on same board

    I recently bought TM4C123GXL evaluation kit (Texas Instruments). I found 2 microcontrollers on that board. I heard that it is something related to JTAG. But I didn't understand what it is even after browsing about it.

  • Does anyone have instructions for how to setup for developing ARM based applications on OS X?

    I am interested in learning the ARM system and embedded programming but exclusively use a MAC with OS X.  Does anyone have or know of how to get and IDE set up and running on OS X?

  • ARM7TDMI or Cortex-M3 board - which should I consider?

    If I have two ARM7TDMI core board and Cortex M3 core board, and I need to choose one of them to use.

    What should I consider the different between them and why?

  • how to configure a I2C in MCB1700 with LPC1758?

    how to configure a I2C in MCB1700 with LPC1758?

    I have a MCB1700 board with LPC1758, I am trying to use the I2C on it as a master to run a ultrasonic sensor srf08.

    How should I configure the I2C setting on the LPC1758?

  • Using UART to write to SRAM

    Hi All,

    I am using UART to receive values and then write those values to SRAM. I am using the Texas Instruments Stellaris LM4F120 board.

    For this purpose, I am using the memcpy() function to write the received values over UART to my SRAM base address defined…

  • Debugging a Cortex-M0 Hard Fault

  • Unable to set software breakpoints in IAR IDE

    I'm using IAR Embedded Workbench to debug a Cortex-M0 system interfaced through ST-LINK/V2 SWD. The processor isn't officially supported because it is under development, but the configuration files have been updated with correct data. I'm not sure however…

  • How to interface Accelerometer, EEPROM, GPS and GSM with Cortex-M?

    just help me out interfacing of GPS and GSM with Cortex-M?

  • How can CLZ equivalent be achieved on Cortex-M0 where this instruction is missing?

    Looking for alternates for this instruction.

  • Trouble with read write on SD card

    Hello community members.

    I have recently started working with SD card using Microchip ARM based uC SAM4. So far I have managed to initialize the HSMCI interface of SAM4 and SD card is also initialized and has responded with the card capacity and the RCA…

  • Recommended book on ARM

    HI,

    i'm an ICT professional (so also with an IT background) and very much interested in embedded development (IoT solutions). Until now I mainly did embedded development (mainly ARM m3, m4 microprocessors based development boards: eg Spark Core, TI CC3200…

  • May I know where does stack memory begin in a Cortex M3's memory?

    For example, is it at the beginning of RAM, user or silicon vendor defined?

    I'd like to know such that I can identify the stack boundaries in memory and therefore know if I've caused a stack overflow in my code.

    My device is an LPC1778, and Im using…

  • ARM microcontrollers in sd cards?

    Which ARM Microcontrollers are embedded in current SD Cards? The Motorola 8051 tends to get mentioned in this connection, with occasional, vague references to ARM. So, which specific ARM technologies are used for this purpose, and what kind of embedded…

  • How to use CCM SRAM for Cortex-M4?

    How to compile in gcc 4.9.3 for CCM SRAM usage?

  • Can the Cortex-M3 stream videos?

    I'm (trying to) build a device that can receive and play/stream videos wirelessly to an embedded system. I wanted to know what would be the best course to take? If the ARM Cortex-M3 is a viable option for this, do I need a separate video controller…

  • Cortex-M4 setup vector table for external interrupts

    I don't want to setup the vector table for all my external interrupts. For instance I only need the timer4 IRQhandler at IRQn 30. How can I make an offset in the table? Is this necessary?

  • Some questions about the LPC810

    Hi the experts,

    I'm not sure but i think that chip can realy help myself in my actual projet. i wanna get  precisions about this chip.

    sot097-2_3d.gif

    In the technical datasheet i can read this :

    ARM Cortex M0+ with 4KB flash and 1KB SRAM

    • 2x USART
    • 1x I2C
    • 1x SPI
    • 4x…