I have initialized the above controller in C++ in Keil 5uV. After the initialization, I want to jump to or enter a timing critical assembly language algorithm under the int main(void) statement. What is the preferred method to accomplish this?

MJ

I have only used assembler when working with MCU's. I can follow a C program but have not used it in any commercial product. Can anyone suggest a development platform to start off learning the ARM and C? I would probably work on a Cortex M4F as a start…

Hi.

I wonder how to calculate absolute value of a 32-bit signed integer in C as fast as possible. I saw that there is a FPU instruction VABS.F32, which do that in one cycle (above the floats). I thought, if it is possible to use it also with integers …

Hello again.

As I am very interested in learning ARM architecture, I would have few questions regarding assembly programming. Questions refer primarily to programming Cortex-M processors, because they are the only one which I am using (at least for now…

Hi.

I would like to use bit-banding feature in SRAM, but don't know exactly how to implement it with C. I already use bit-banding in peripheral region with this kind of macro:

#define BITBAND_PERI_REF        0x40000000…

hi

I'm using the soft-core Cortex-M0,keil uvision 5,vivado 14.4

I am trying to implement a filter on my Cortex m-0 based FPGA

the main idea of this project is to create an accelerator from my C code to reduce the execution time ..and since my accelerator…

Hello, Everybody. I have several questions.

1. Please See the NVIC_Type structure. I don't understand about why ISER,ICER,ISPR and ICPR use size of array 1( I think It can use just __IO uint32_t ISER; ), and what does RESERVEDs do???

2. I would like…

Hi,

I think I am just getting confused with this even if (or because of) I read the book and manuals again and again.

At exception entry, the processor saves R0-R3, R12, LR, PC and PSR on the stack. Saving PC means that the address of the instruction to…

I want to communicate NXP LPC2378 (ARM7 core) to some other devices via SPI (Serial Peripheral Interface) protocol.

So how to write a C code to communicate a particular device as a Slave with Master (ARM7 controller)?

Hi,

I have two M0 projects.  The first project has only one assembly file startup.s.  The second project has one assembly file and one C file.  When I checked the memory map file of the second project (shown below), there are some extra object codes included…

would u mind telling me please I'm really interested in this kind of stuffs.

CORE: STM32F103ZET6

Hi,Pros.

     Here Monkey comes agian

I have met a problem with my code,see below:

/* --------- code here --------- */
     .section .data
_sp_usart:
     .word     _stack_usart
_stack_usart:
     .space     0x100…

Hi everybody,

We are working on a simple priority RTC (run to completion) framework for the Cortex M3/M4. Thanks to the NVIC/BASEPRI, we got most of this functionality for free but we want to extend it to user tasks.

In our implementation we need to determine…

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…

Hello!

I finally decided to share some info about a project I've been doing for the past 8 months. Currently it can be considered "alpha" or maybe "early beta" stage, but - despite literal meaning of these terms - the things that are already done (and…