• IP Camera interface via STM32

    Hi all,

    I am looking for developing an IP camera based system based on STMicroelectronics STM32. The way it is supposed to work is:

    STM32F4 will have few IP cameras connected to it. It may have a web server running so it can be accessed from outside…

  • will cortex m3/m4 enter a lockup mode if a serious fault happened while FAULTMASK is set

    Greetings,,

    what happens if FAULTMASK is set in cortex-m3/m4 and one or more serious fault happened like bus fault, MPU violation, invalid instruction, stack corruption.. etc will the processor enter a lockup? if not what would be the status of the processor…

  • Could you explain the uDMA burst request in Cortex M4F to me?

    Hi,

    When I read the following on Cortex M4F, I don't understand the blue phrase on the uDMA process.

    1. Why does it selects the lesser? The arbitration size matters uDMA services here?

    2. I remember that DMA burst cannot be interrupt, even by high priority…

  • Sharing about the famous LCP1114FN28

    Hi,

    I'm making test some on the famous LPC1114FN28 is there somebody who have some experience about it ?
    Please, thank for sharing here

    250x250xLPC1114_1.jpg.250x250_q85.jpg.pagespeed.ic.3sWDuPJKyE.webp

    Here is the beast

    xpinout_dip28-20150119-.png.pagespeed.ic.xsp2MmDHYf.png

    And the pinout informations

  • How to change the BMI(Boot Mode Index) with Serial Wire Debug Protocol???

    Greetings,

    sir/madam i am working on serial wire debug protocol. I was implemented serial wire debug protocol, which was successfully tested for used controllers like xmc1100,xmc4500..etc, when i tried to Access the control on newer controller i.e xmc1100…

  • Align source and assembly

    I have a source file, converted it to assembly and added 2 instructions and generated the final elf. When I load this final elf, symbols doesnt match the source due to assembly instructions addition.

    Is there a way to align them ? am using ARM cortex-M4…

  • Reach 200 degre celsius with the temperature sensor in the ATSAM20Dj18a

    Hi, i'm working with the ATSAM20DJ18A (using ASF) and i'm doing some temperature monitoring. But it seems like I'am stucked at 169 degre celsius. Is there a way maybe by changing the ADC reference to mesure 200 degre celsius?

    Regards,

  • Cortex-A vs. Cortex-M, Real Time Applications

    I'm searching for microcontrollers for a real-time motor control application. I see a lot of Cortex-M solutions for handling this, but why don't we see a lot of Cortex-A solutions specifically targeted for this?

    Is there something inherent to the…

  • Cortex M0 internal Failure solution for ALU, CPU and Register rong results

    Hello All,

    I am using Cortex M0 based controller and want to know if the following issues can happen and what can be the possible solution by software to handle the issues:

    1. ALU resulting wrong result run time.

    2. Register access giving wrong results run…

  • Measurement of square wave frequency using Arduino due

    Dear Friends

                       I am very new to Embedded World especially Arduino and ARM micro controllers. I need to  measure square wave freq upto 8 Mhz using arduino. Can any one guide me in this regard.... Now I am able to measure upto 110 KHz. Here…

    • freq_result_2316.txt.zip

  • Audio Amplification using microcontroller???

    Hi everyone!!! i'm new to STM32f4. i was wondering if this microcontroller can amplify an input analog signal through audio jack i.e an audio signal and produce amplified voltage at any gpio pin...

  • Open Source IDE

    Now we are thinking of using cortex M4 based MCU in custom board design, can I know is there any opensource IDE/Toolchain available?

    Is there any other opensource cross compilation tool chain available for  cortex M4 ?

    thanks and regards,

    Jeevan

  • GNU Scientific Library vs CMSIS Library Time and Space complexity

    Hello,

             I have been using CMSIS library for implementation of DSP functions in ARM, however, CMSIS have very limited DSP functions. Although GNU has many DSP functions which CMSIS do not, It only have floating point implementation. I am trying…

  • Programming ATMEL SAM E70 in Assembler. I'm new.

    Hi Guys, I've just started programming in Assembler on the ATMEL SAM E70 Cortex M7 microcontroller.

    Is there any assembler code snippets for Sam E70 for me to check out.

    I'm an assembler programmer for years now and have just started on ARM Cortex assembler…

  • can i use QNX Neutrino RTOS with cortex-m3

    I have seen that lot of arm boards are having qnx rtos but all were like cortex-a or cortex-r ,but the soc i have is having cortex-m3 ,so before investing lot of time in this os ,i want to be sure whether at the end it will work with cortex-m3 or not…

  • I want to learn RTOS in ARM Cortex-M Processors.

    Hi, I wanted to  start learning RTOS in ARM Cortex M Processors. I currently work on Cortex M0 IC provided by Nuvoton where I use the BSP to get things done.

    Now I need to move a step ahead and start learning RTOS and Implement it .

    I had gone through…

  • I have  to do project on MMC card interfacing and Audio Player on ARM CORTEX M3 ..which hardware and software should I use for it?

    I have  to do project on MMC card interfacing and Audio Player on ARM CORTEX M3 ..which hardware and software should I use for it?

    how should i start the project...steps to be followed...I am new to this field ...pls help me.

  • file compression with cortex M4

    Hi

    I'm using a kinetis K64 cortex M4 with FreeRTOS and I need to compress files on a SD card. I have 100-150ko free Ram.

    Do you know a library for this ? I found only solutions with 1Mo minimum RAM requirement.

    It's csv files. I have a lot of time available…

  • FFT C-File

    Hello everybody,

    im using the Math.h file to do a rfft with 1024 points und q15 datatype.

    So far everything works fine, and I get good results. It needs a computation time of ~720us on my CortexM4 @100Mhz.

    This is very Impressive, but to long for my application…

  • WFI Instruction

    Hi,

    I want to use the wfi instruction in my code. I'm sending a command to a module and wait for the reply.

    I have configured UART communication with the module. Will it be good to use wfi() instruction? I know that it will turn  the cpu to power down…

  • Cheap alternative of J-Link Segger

    I am looking for some alternative of J-Link Segger for Cortex-M3/4 , the cheapest one is J-Link Base as J-Link Lite can be used only with evaluation boards, 

    Any suggestion ?

    I am using GNU arm gcc as toolchain and debugger and Eclipse as IDE, I…

  • How to remove group delay for CMSIS DSP FIR low pass filter function?

    Hello All,

     

    I'am using  TI MCU TM4C129x  and code composer IDE.

    I've integrated the CMSIS DSP library inside my code and I'am able to apply the low pass filter using arm_fir_f32() function.

    My input signal is the Varying frequency Sine wave…

  • How to configure Cortex M3 endianness?

    I found two statements in cortex m3 guide(red book)

    1. Cortex m3 supports both Little as well as big endianness.

    2. After reset endianness cannot be changed dynamically.

    So indirectly it is telling change endianness settings in reset handler , is it so…

  • Arm cortex M3(LPC1769) MPU settings

    Hello everyone,

    I am trying to set up the MPU in my LPC1769 Xpresso board. The memory map of LPC1769 is as given below:

    512kB FLASH           @ 0x0000 0000 – 0x0007 FFFF
    32kB on-chip SRAM @ 0x1000 0000 – 0x1000 7FFFF

    I am only configuring 2 regions…

  • to size boundary of the structure alignment

    dear All,

    i started an arm cortex m3 project using eclipse+gnu.

    i want to size boundary of the structure alignment.

    where and how i can do it?

     

    thanks and regards,

    Ras