Exponential Function on ARM7

asmi279

Note: This was originally posted on 16th October 2008 at http://forums.arm.com

Hello

I am doing a project of Artificial Neural Network Implementation on ARM core. I wanted to know if exponential operations are possible on ARM7 or ARM9 and if yes, then how…

CPSR status back to C variable

Luken8r Luken8r

Note: This was originally posted on 17th November 2008 at http://forums.arm.com

Im using the TI Code Composer suite with an ARM 7 and Im looking for a way to get the CPSR back into a C variable. I was looking through the documentation that came with the…

Problem: SRAM region is full

civil777

Note: This was originally posted on 12th December 2008 at http://forums.arm.com

Hello!

I am getting the compiler error that "sram region is full", and I am trying to identify the possible causes. I know this is basic problem, but I am a newbie!…

Answered

help needed on arm7 timer interrupt

duoduo duoduo

Note: This was originally posted on 15th January 2009 at http://forums.arm.com

Dear all !
i am trying to use a timer interrupt to call a function in an ARM7 platform.i hope this timer interrupt can happen in a 320 microseconds interval.however,i found…

Answered

Of exceptions and aborts..

Felix Varghese

Note: This was originally posted on 21st January 2009 at http://forums.arm.com

The ARM reference manual specifies sometimes MOV PC,R14 and sometimes SUBS PC,R14, #4 for returning from exceptions. But they have not mentioned why. Can somebdy expain?
Also…

Answered

what did these Assembly codes mean?

duoduo duoduo

Note: This was originally posted on 3rd February 2009 at http://forums.arm.com

Dear all,
i debugged my codes on AXD, and the microcontroller is arm7 s3c44b0.
it ran well at the beginning, into the "main" function, did some initializations, and so on.…

Answered

ARM7TDMI: SUBS vs SUB + CMP

Greger Greger

Note: This was originally posted on 2nd April 2009 at http://forums.arm.com

Hi,

I have a question regarding the SUBS instruction and how it compares to SUB and CMP (due to unexpected behavior in a C-program).

The original C-code goes like this (all variables…

Answered

Writing ARM application containing both C code and assemply code

Pavan Kumar

Note: This was originally posted on 6th September 2007 at http://forums.arm.com

Hi I need to put one ARM instruction in ARM application written in C.
Basically my application looks like
void main(void)
{
................
................…

Answered

LPC2148 timer0 not working as expected

kamalpancholi

I am new to ARM and I am trying to produce 1 second delay using timer 0 in LPC2148. But in debug session in Keil, it is giving delay of 4 seconds with 15MHz and 5 seconds with 12 MHz. What is the issue ?

Here is my code.

#include <lpc214x.h>
int main…

11 months ago
Software Tools
Keil forum

Modified harvard architecture

deepud

Hello,

I am preparing for the AAE. ARM is a modified Harvard architecture. What is this about ? I searched in internet and got various answers.

Can anyone tell me exactly what is this modified Harvard architecture in ARM's point of view ? Please point to…

Answered

lpc2148 library bundles and c programming tutorial

Gokhu

Hi Friends.. I am Gokhu..New to ARM..i start my learning process..i need library function of iolpc2148.h and main.h and stdio.h, RTC.h,ADC.h and DAC.h uart.h these kind of library bundle and i need a material or online site to learn arm C programming…

Answered

State of link register on an interrupt from Thumb (ARM7TDMI).

Revanth Kamaraj

Hi,

If an interrupt occurs when in Thumb state, does the LSB of the link register become 1.

Thanks,

Revanth

Answered

In ARM7 and ARM9 PC=current + 8, but in the cortex-A7(8-stage pipeline) the PC is also the same value(PC=current +8), how does this work?

Kun.Niu

In ARM7 and ARM9 PC=current + 8, but in the cortex-A7(8-stage pipeline) the PC is also the same value(PC=current +8), how does this work?

I think the cortex-A7 has 8-stage pipeline, the PC value is also current+8(this is back-forward for old design), but…

Answered

Why does ARMSim# not recognize instruction 'addw'?

Robert

Hi,

For the below code, ARMSim# does not recognize '.arch armv7-r'. It says:
"unknown opcode or directive: .arch"It does not recognize 'addw' either, says:
"unknown opcode or directive: addw"I have check ARMTRM. 'addw' is a legal…

Answered

Beginers questions regarding ARM development.

travjav92

I am just starting out developing with ARM and am really enjoying learning about these processors. I have a few questions that have been on my mind as a newbie that I'm hoping some people can answer.

From my understanding, the ARM cortex m0 series…

how to send data from open cv to arm 7

Gaitonde

I am working on a project using lpc2148 development board. i have done image processing in opencv. how to send that data to arm7

Answered

ARM7 Programming question!

Velagala J R N D V Reddy

Hi

I had a doubt about programming the arm7. In which scenario I should use explicitly Assembly language instructions while programming.

Thanks

Answered

What is the most common ide on gcc for arm 7?

Kumud

What is the most common ide on gcc for arm 7?

over 6 years ago
System
Embedded forum

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

Paul Ng

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?

over 6 years ago
System
Embedded forum

I got a error when i build my file in RTRT - I am using LPC2148. Error: L6411W: No compatible library exists with a definition of startup symbol __main.

chinna

Please tell me the answer for my error

Answered

I wrote a code for UART0 in LPC2148 for transmitting - it is working at debugging, but not working in proteos

madhukar

sir please help me why it is not working.

Answered

AD converter

Bojana

Halo to everyone,

I have ARM NXP LPC2378 on MCB2300 board, and when I upload blinky example project to board AD converter works correct, but when I write my code, and upload to board, my program never gets into ADInterrupt routine? Does anyone, know what…

Answered

Delay Subroutine LPC2148 Assembly

Gaurav Pathak

Hi Experts,

I have just started with ARM assembly, I have written a program in assembly for toggling GPIO. The issue that I am facing is that the code works when I use several "nop" in place of "bl delay". The code goes below:

.equ IODIR0…

Answered

RTOS ARM7 BOARD

suhail

I'd like to create an RTOS on board of NXP - LPC2138 can any one help me which program shall i use it to perform ; and the code ; thank you very much ?

Answered

Crosscompiling C++ Ubuntu / Raspberry Pi

anneranch

I am using Eclipse IDE to crosscomplie C++ code.

When I croosscompile Linux / Ubuntu C++ code for Raspberry Pi 3B (ARM7) I have no issues with actually running the code on the target. It all works as expected. I am using just plain "hello word " as test…