ARM Cortex-M3 floating point...

dtvonly dtvonly

Note: This was originally posted on 9th May 2008 at http://forums.arm.com

Hi. Are there any floating point support for the ARM CORTEX-M3?

Abort some questions of arm interrupt

josh zhao

Note: This was originally posted on 20th June 2008 at http://forums.arm.com

I try to understand arm interrupt,there are some questions I don't know,
1. Why the nested interrupt has to switch out of irq mode to svc mode? I think it only pushes…

Loading instruction set

chaitanya chaitanya

Note: This was originally posted on 7th October 2008 at http://forums.arm.com

HI,
I am trying out the Cortex M1 on an altera FPGA. I have an example implementation from the Altera kit which uses ITCM to load the software files on the ARM. I want to instead…

hard fault with Cortex M1

sumit sumit

Note: This was originally posted on 24th December 2008 at http://forums.arm.com

Hi all,

I am developing firmware on Cortex M1 on Actel fusion FPGA.I have built the design that has sram at 0x0 location ,size is 1mb and I use it as my program memory.I have…

ARM9 replacing Cortex M3

Michael von Hauff

Answered

Cortex M3 compilers and benchmarks

Andrey Madan

Note: This was originally posted on 20th January 2009 at http://forums.arm.com

Please help me identify the best compiler for CortexM3.
I currently use armcc from ARM, but curious if that is the best option on the market. So far, I found a couple of options…

How to get Call Stack from stack data.

Mountain Mountain

Note: This was originally posted on 23rd January 2009 at http://forums.arm.com

Hi everyone.

Here is a question that puzzled me a long time. if I get stack data(HEX data), anyone konw that how to get call stack from it.

How to know that…

Bus Matrix

Felix Varghese

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?

over 6 years ago
System
SoC Design forum

ARM Cortex ICode, DCode, System buses

Felix Varghese

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?

…

over 6 years ago
System
SoC Design forum

Shortest code for memory to memory transfer

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…

Invalid assembly instruction MOV PC, R13 Cortex M3

Umut Umut

Note: This was originally posted on 24th March 2009 at http://forums.arm.com

Hi,

I am trying to compile linux kernel 2.27 with CodeSourcery GNU toolchain 4.3.2 and somehow I am getting assembler error for instruction

MOV PC, R13

Well, for some reason ARM…

What is the general purpose register number for LR in Cortex M3

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…

Precise Memory Error

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…

Question : The Definitive Guide to the ARM Cortex-M3

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…

[CM3]UART always lose the last char

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

migration from ARM to AVR

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

does ARM Cortex-M0 DesignStart support SWD debugger?

sieg70

I am studying the ARM Cortex-M0 DesignStart. I found there are debug port SWDIOTMS and SWCLKTCK in the port list of cmsdk_mcu.v, and there are CPU options which defines the CPU's feature.

I configured the parameter DBG = 1 in the cmsdk_mcu.v Line37…

Answered

over 3 years ago
DesignStart
DesignStart forum

Introducing System-on-Chip Design with Arm Cortex-M Processors

Robert Iannello

In August 2019 Arm Education Media will be publishing our newest title, System-on-Chip Design with Arm Cortex-M Processors, written by Joseph Yiu, Distinguished Engineer, Embedded Technology, at Arm.

This is a new line of products from Arm Education Media…

Shifted binary generated by arm-none-eabi-objcopy

en2senpai

Moved to:

https://community.arm.com/developer/ip-products/processors/f/cortex-a-forum/43775/shifted-binary-produced-by-arm-none-eabi-objcopy

Configuring Armv8-M systems with CMSIS-Zone

Christopher Seidl

The configuration of a microcontroller system that includes TrustZone-M or several processors can be difficult, as the application software of the system is developed with multiple sub-projects that share common memory and a set of peripherals. Furthermore…

Introducing a Python wrapper for CMSIS-DSP with biquads

Christopher Seidl

My colleagues from the Arm Digital Signal Processing (DSP) software team have introduced a Python wrapper for the CMSIS-DSP library that is compatible with NumPy. The CMSIS-DSP library is a rich collection of DSP functions that Arm has optimized for the…

11 months ago
Software Tools
Keil forum

Cortex-M3 Hard Fault - find cause?!?!?!?

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

Design Start ARM Cortex-M0

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

I want to know priority of Cortex-M3 processor

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

Cortex M4 vs Cortex A9

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