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ARM

Great Reads

Lightning Never Strikes Twice? Maybe Blitzortung knows!

by DaveAuld

Building for and consuming the Blitzortung Lightning Detection Network

ARM Tutorial Part 1 Clocks

by Mike Hankey

This is the first in a series of articles based on the ARM CPU architecture.

ARM Tutorial Part 2 Timers

by Mike Hankey

A look at the STM32 Timer peripheral

Beginning with the ST32F3DISCOVERY Microcontroller Board from STMicroelectronics

by Richard Chambers

An introduction and a first walkthrough of using STM32CubeIDE with the ST32F3DISCOVERY board.

Latest Articles

Porting Your Applications to Arm64 Using Arm64EC — Series (Part 2)

by Dawid Borycki

Implementing Desktop Apps with Windows 11 on Arm64 and .NET

by Dawid Borycki

This article demonstrates how to use WPF with .NET 8.0 to implement a desktop application that runs on Arm64.

Running ASP.NET Core Web Server on Arm64

by Dawid Borycki

This article demonstrates how you can use ASP.NET Core with Windows 11 to build a web server for a headless IoT application. You will gain insights into harnessing Arm64-powered devices that offer high performance while consuming minimal power for your IoT applications.

.NET Performance on Arm64

by Dawid Borycki

This article demonstrates how to use Arm64 to run .NET applications, acquiring advantages of native architecture like power efficiency and a speed gain.

All Articles

ARM

Lightning Never Strikes Twice? Maybe Blitzortung knows!

27 Aug 2015 by DaveAuld

Building for and consuming the Blitzortung Lightning Detection Network

ARM Tutorial Part 1 Clocks

6 Feb 2023 by Mike Hankey

This is the first in a series of articles based on the ARM CPU architecture.

ARM Tutorial Part 2 Timers

12 Mar 2023 by Mike Hankey

A look at the STM32 Timer peripheral

Beginning with the ST32F3DISCOVERY Microcontroller Board from STMicroelectronics

14 Oct 2021 by Richard Chambers

An introduction and a first walkthrough of using STM32CubeIDE with the ST32F3DISCOVERY board.

microcontroller

Why "nop" kind of instruction is generated by arm compiler

24 Nov 2015 by OriginalGriff

Flags.It clears the Carry flag, so that it isn't propagated by the right shift into the resulting value.http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0068b/BABJAJIB.html[^]

Building a Native Windows on Arm App with WinForms

24 Aug 2021 by Thomas Daniels

This article will show how to create a simple but complete WoA-native Windows Forms application.

.NET Performance on Arm64

8 Sep 2023 by Dawid Borycki

This article demonstrates how to use Arm64 to run .NET applications, acquiring advantages of native architecture like power efficiency and a speed gain.

Implementing Desktop Apps with Windows 11 on Arm64 and .NET

11 Sep 2023 by Dawid Borycki

This article demonstrates how to use WPF with .NET 8.0 to implement a desktop application that runs on Arm64.

Arm architecture differnces

8 Aug 2015 by OriginalGriff

ARM do not make uProcessors: they make core IP, which they licence to anyone who wants to pay to use it in their designs - and an damn good design it is too! Arm architecture is most definitely not open-source! :laugh:What that means is that the "basics" are the same, but the "wrapper" round...

Character recognition in C

13 Sep 2019 by Stefan_Lang

I just looked up the specs of that board, and I can tell you that if you're really limited to 512KB memory, you'll have a hard time running a neural network, and certainly one capable of character recognition! I can speak of personal experience: 30 years ago I used what was then considered a...

GFX Part 3: Drawing Primitives

25 Apr 2021 by honey the codewitch

Explore the basic drawing functionality provided by the GFX IoT library

Running AI Models in Docker Containers on ARM Devices

27 Apr 2021 by Jarek Szczegielniak

In this article, we’ll adapt our image for Raspberry Pi with an ARM processor.

machine-learning

Simon Says, A Child's Game

3 Apr 2023 by Mike Hankey

Project like "Simon Says"

Building Native Windows on Arm Apps with Python

15 May 2023 by Dawid Borycki

This article demonstrates the convenience of using native Arm Python 3.11 on Arm-powered devices to experience up to a threefold performance boost over using it in emulation mode.

convert x86 intel .os libarary to arm processor

8 May 2014 by OriginalGriff

Recompile the original source with an ARM compiler: you can't convert X86 machine code (which is what the library will contain) to ARM machine code - they are totally different processors and indeed types of processor. X68 is CISC, ARM is RISC (according to the manufacturer anyway: I disagree).

Compiling Native C/C++ library for Android

20 Aug 2014 by pi19404

This article describes the method to cross compile C/C++ library for Android OS

Multiplication of 32 bits numbers in C

8 Mar 2015 by Sergey Alexandrovich Kryukov

FranxCDOFranx wrote:Hey Sergey, if you are referring to me yes I didn't not understand as I am a beginner in this field. I am trying to debug and find the reason for the wrong multiplication. If you want to be more specific to the problem as to how I should debug and fix the algorithm please...

Multiplication of 32 bits numbers in C

8 Mar 2015 by FranxCDO

As phil.o and Sergey Alexandrovich Kryukov state above, the problem was with the representation of the numbers. The below code works.#include #include #include #include #define LOW_WORD(x) (((x) > 16) #define HIGH_WORD(x) ((x) >>...

Arm assembly programming

2 Sep 2015 by Richard MacCutchan

Assuming from your question you do not have a copy of a reference manual, you can find the answers quite easily by following: https://www.google.com/search?q=arm+assembly[^].

Arm Xscale incorrect branch

21 Oct 2015 by Jochen Arndt

A hardware bug is very unlikely. It may be a compiler bug. You may put another print statement in front of the switch statement to ensure that the value is zero there.To confirm a compiler bug the generated assembler code must be checked. You may edit your question and add that. Maybe...

What means a snippet ((ADC_typedef *) ADC1_BASE) in header file?

12 Mar 2016 by OriginalGriff

It's a standard #define - it means that the preprocessor will replace the text ADC1 with ((ADC_TypeDef *) ADC1_BASE)each time it sees it in your source code. Look up the definition of #define and you'll see what I mean:Preprocessor directives[^]

microcontroller

Client Certificates in Azure Websites

29 Sep 2017 by adityasahver

In this tip, we will learn how to enable the Certificates in the Azure Web Sites

pass by reference in assembly

22 Mar 2013 by Venkatesh Kuppan

I am trying to write a program to calculate the exponential of a number using ARM-C inter-working. I am using LPC1769(cortex m3) for debuuging. The following is the code: /*here is the main.c file*/ /*function prototypes*/#include >#include >extern int Start...

microcontroller

I am looking for a complete CMSIS library reference with examples

12 May 2013 by CHill60

Assuming you mean the CMSIS DSP Software Library as provided by ARM Ltd then this is the reference you need CMSIS DSP Software Library documentation[^]

Linux ARM cpuid/cpubrand C++

25 May 2013 by Smirftsch

is anyone aware about a method to get CPUID and brand string, as well as maybe even features, similar to MMX/SSE etc. detection for NEON in Linux ARM?It seems to lack any form of __cpuid and cpuid.h ain't existing also - at least on my distro (OpenSuSE12.3)It's not vital for my project,...

Linux ARM cpuid/cpubrand C++

26 May 2013 by H.Brydon

You didn't say which ARM you are dealing with, but the Raspberry Pi (and others) tell you the CPU ID and other info with command linecat /proc/cpuinfowhich you can use from C/C++ with a system() call.

ARM7 Assembly code that computes the Factorial error: A1163E: Unknown opcode loop , expecting opcode or Macro

13 Nov 2013 by Shta

AREA factorial,CODE ENTRY ;program to find factorial MOV R0,#1 ;int c =1 MOV R1,#6 ;int n=1 MOV R3,#1 ;int fact=6 BL loop B out loop ;what is the error MUL R4,R3,R0 ADD R0,R0,#1 CMP...

Linux + ARM + KINECT + C# + MonoDevelop, is that possible?

19 Feb 2014 by morther

I am developing a project that involves creating a product composed of hardware and software that enables interaction with various features.I'm still in the testing phase , however , is sent to the brain of this product is a mini computer ODROID U3 , running Xubunto 13.10.In addition to...

Operating ARM CAN Bus Drivers Using C#

12 May 2014 by Member 10747995

Hello,I am doing my MSc project and I am having a problem driving my CAN bus using C#.I am using this ARM based HMI and the supported BSP source files for Windows CE 6.0 coming from the manufacturer's webpage:http://www.technexion.com/index.php/products/hmi/th-0735w[^]There is a...

Where Can I Find A Good Tutorial Of Xtion + Udoo(Arm)

7 Aug 2014 by Erloic

Hi all,I'm a computer developper , i've been strugling lately for a month now, trying to install all necesary packages to get my Xtion camera to work on my Quad core(Arm) Udoo board with Ubuntu 12.04 with any given sample.Does anybody knows a good tutorial of Xtion + Udoo(ARM) on Ubuntu...

microcontroller

Why WinCE boot-time gets longer over time?

24 Aug 2014 by Sergey Alexandrovich Kryukov

This is the usual problem. The system tends to be contaminated with more and more, often unused processes. Viruses also can take place; who knows?You can download and use of of the registry clean-up utilities. Also, this is on of the applications which can help you to find out what...

QR algorithm implementation 3x3 symmetric fixed point

1 Mar 2015 by FranxCDO

I want to find the eigenvalues and eigenvectors of a 3x3 matrix. My numbers are stored in fixed-point format (16.16 to be exact).Note that I don't mind much about the performance, but simply implementing an algorithm that does the job.The code below, when you build it and run it (with...

Unity Resource Center for x86 Support

31 Jul 2015 by Android on Intel

This Unity resource page on the Intel® Developer Zone is your central location for support of x86 within the Unity game engine.

Arm data abort exception handler running in the task context?

8 Sep 2015 by chandrAN2&

I am working on a ARM xscale board, where for data abort exception there is an exception handler which is getting executed in the task context. Is this correct?whenever an abort happens,cpu will switch to Abort mode and use a separate stack and the handler will be executed in context similar...

Arm Xscale incorrect branch

21 Oct 2015 by chandrAN2&

I am working on arm xscale embedded system. Here I am seeing a incorrect branch is getting executed in switch case.Below is my switch case looks like,switch(val){ case 0: .... break; case 1: .... break; case 2: ..... ...

Flash remapping in Arm

28 Oct 2015 by chandrAN2&

Recently I have gone through one of the ROM linker script where the arm exception vectors are placed in one memory location(Probably in flash memory in address 0x90000000) and below Ram sections are defined where it is mentioned that "exception vector table will be copied to ram once flash is...

Why "nop" kind of instruction is generated by arm compiler

24 Nov 2015 by chandrAN2&

signed char ch;short int a = 220;I have return the above c program to assign a short int to a signed char as below.ch = a; //assigning short int to signed char variable ch;Below is the assembly code generated for the assignment statement. MOV R2, R6, LSL 24 R6...

Why "nop" kind of instruction is generated by arm compiler

24 Nov 2015 by Mehdi Gholam

Generally "nop" instructions are introduced into debug versions of the compiled executable for :1) aligning to byte boundaries for internal cache structures for better loading.2) a place holder for debugging breakpoints for debuggers.3) handling known timing issues on processors.

Why "nop" kind of instruction is generated by arm compiler

24 Nov 2015 by jeron1

If a NOP is not implemented on the target processor, it may do this. See this link here[^].

What means a snippet ((ADC_typedef *) ADC1_BASE) in header file?

12 Mar 2016 by stackprogramer

i read the header file stm micro Arm,in header file :micro is stm32f407 and environment is keilwhats means this state means in macro definition?#define ADC1 ((ADC_TypeDef *) ADC1_BASE)#define ADC2 ((ADC_TypeDef *) ADC2_BASE)definition ...

microcontroller

How can I do voice recognition with ARM based microcontrollers?

23 Aug 2016 by Cryptonite

I recommend the Raspy Pi for what you're trying to do. Spoiler alert! You will have fun tinkering with this board.Best Voice Recognition Software for Raspberry Pi - DIY Hacking[^]And this one is compiled using GCC (which is a C compiler):Adding speech recognition to your embedded...

microcontroller

How can I do voice recognition with ARM based microcontrollers?

23 Aug 2016 by Dave Kreskowiak

You're going to have to do you're own research on this, possible even go as far as implementing some of this in hardware yourself.Start reading these[^].

microcontroller

Audio comperession with arm

2 Dec 2016 by Member 12814209

HiI wrote a program to take samples of the sound signal with lpc1768butto reach Good quality sample rate should be take at least 40 to 50 k samples is that each sample is 12 bits so the volume occupies is too muchSo I need to use an algorithm or library that can compress it for mei...

Audio comperession with arm

2 Dec 2016 by Rick York

Have a look at Zlib. It is used for PNG image compression and is lossless. Plus, you can find the source code written in plain, old C. It is capable of in-memory compression so it should be able to do exactly what you want.

Audio comperession with arm

2 Dec 2016 by CPallini

You may use a mp3 decoding library, see this paper: "Audio Player Design Example"[^] though, at first glance it looks you need a more powerful chip.

Audio comperession with arm

2 Dec 2016 by Dave Kreskowiak

How long of a sample do you think you're going to fit in 32KB of RAM? I certainly hope you're offloading the storage of this sample to something else besides the uC or are streaming the samples to a PC or something bigger.If you're not, you are going to need to move up to a bigger uC with...

How do i...triggering alarm interrupt STML476VG

17 Apr 2019 by EYurk

I am having trouble getting my alarm to trigger. So the problem is that when you hit a button on the board, the program counts to ten and then runs a stepper motor. It is all based off the RTC and the alarm is generated by adding ten to the RTC and when the alarm and RTC are equal, the flag is...

Character recognition in C

12 Sep 2019 by OriginalGriff

So go there, and start reading. This is a complicated subject, and you will probably have to do a lot of work to get it up and running. But ... you have a starting point - so go there, start reading and think about how that needs to be adapted to fit your hardware and your software requirements...

Is there a way to call azure webhook request through postman?

2 Mar 2020 by Haider Nafees

I have deployed Azure resources using ARM templates and linked it with WebHooks. Now I want to make a call of WebHook URL along with parameters using Postman. Can someone please let me know if there is a way to do it? What I have tried: I have...

Is there a way to call azure webhook request through postman?

2 Mar 2020 by Viswanatha Swamy

@HaiderNafees, Good morning. Looks like it should be possible. Could you please try with 1. Invoke-WebRequest, and then replicate with Postman. Could you please refer the below links. Starting an Azure Automation runbook with a webhook |...

.net core iot error while running my C# code on ARM embedded board

18 Jun 2020 by Member 14867519

I want to use .NET core IoT library in order to run C# code for my SAMA5D27 SOM1 EK1 ARM embedded board. GitHub - dotnet/iot: This repo includes .NET Core implementations for various IoT boards, chips, displays and PCBs.[^] I have build this...

Cortex M3 - testing an internal interrupt

11 Jan 2021 by den2k88

Hello, I have a Cortex M3 based SOC and I need to test the response to a RAM ECC error. To do that I would need to simulate the interrupt in some way, problem is it is an internal interrupt, so no pins to drive manually, and apparently there is...

Code isnt working as expected

4 Mar 2021 by OriginalGriff

Quote: Code isnt working as expected Well ... that's normal. Writing code that compiles - or in this case assembles - correctly, does not mean your code is right! Compiling does not mean your code is right! :laugh: Think of the development...

Code isnt working as expected

4 Mar 2021 by Patrice T

Quote: Code isnt working as expected I don't know ARM assembler, but I know this kind of problem. I t is probably time to launch the debugger. Your code do not behave the way you expect, or you don't understand why ! There is an almost...

How to code drivers for touch screen for windows 10 ARM to be installed on Microsoft lumia 640?

13 Aug 2021 by Richard MacCutchan

This is an impossible question to answer in a Quick Answers forum. You need to do your own research into the hardware and software that you are trying to work with. You could also look at Download the Windows Driver Kit (WDK) - Windows drivers |...

Building 64-Bit Windows on ARM Apps with Xamarin

23 Jun 2022 by Gaston Verelst

This article will show how to create a simple but complete WoA-native MAUI application.

product-showcase

How can write a code in arm assembley incrept and decrept string and invert the first and second bits of the ASCII code of each character ?

10 Jul 2022 by OriginalGriff

Quote: I am sorry for my bad question .. but I really don't know where or how to ask since I have to solve this question but I don't know anything about the language because they just teach us theory classes and I don't have time to study it ... ...

How can write a code in arm assembley incrept and decrept string and invert the first and second bits of the ASCII code of each character ?

11 Jul 2022 by merano99

first sol : - This is x86 assembler, known as "mov ax,data". (Probably from the DOS days, which you can see from "int 0x21".) second sol : - This is the ARM instruction set, as you can see from "mov r0, r3". third sol and 4th sol : - This...

Secure sourcing for particular ARM chips?

20 Apr 2023 by honey the codewitch

This is a weird question, but there are many embedded developers I've spoken to on these forums. So hopefully the right eyes find this. I'd like to source say, an NXP iMX6Solo, or maybe an AllWinner H616 or some other ARM Cortex A with HDMI and...