Cannot configure interupts of TIM6 on stm32f103 board
Does my NVIC configuration wrong?
Code:
@ stm32f103 timer & interrupt test by laper_s (from 2019-02-02) .thumb .cpu cortex-m3 .syntax unified .word 0x20005000 .word start + 1 b start…
Cannot configure interupts of TIM6 on stm32f103 board
Does my NVIC configuration wrong?
Code:
@ stm32f103 timer & interrupt test by laper_s (from 2019-02-02) .thumb .cpu cortex-m3 .syntax unified .word 0x20005000 .word start + 1 b start…
I have a very simple CortexM3 based virtual platform example as below

The amba_pv_m2 is connected to a memory in the top. The BusDecoder master port address range is 0x0-0x3FFFFFFF
I have the following C program
#include <stdio.h>
int main(int…
Doing some research of the LDREX and STREX it appears that the exclusivity address range for these instructions on the M3,M4,M7 is the entire memory space. Hence you can only use the LDREX/STREX with one address. Does this not limit you to one Mutex …

The G version has 410 pages!
However, the H version reduce to 133 pages!
It's like a big lost!
what's difference between the older and newer version?
I think it's the ARM job to tell the difference. It's hard and wasting time for the user to…
AMBA spec states that 'Master can choose whether to terminate current burst or continue with burst in response to ERROR'.
What does Cortex-M3/M4 do in response to ERROR? Does it continue with burst in response to ERROR in some special cases?
In Cortex-M3 manual, it is mentioned that during Late Arrival, when low-priority interrupt (LP) has already pushed 8 registers to Stack and high-priority interrupt (HP)occurs then, for (HP), we don't need to do any state saving. What does it mean by …
Hi,
I'm trying to simulate which is accessing the flash rom on Cortex m3 design kit by JTAG?
Is there any related test case or example?
How to start accessing the flash rom on Cortex-M3 design kit by JTAG?
I want to store the value of Program Counter(pc) to a memory location.
I did this,
LDR R1, =[0x20000000]
STR R15, [R1,#0]
I got an error saying, "Error: r15(pc) not allowed here -- `str R15,[R1,#0]'.
How should I get over this error?
MPU is not triggering MemManage fault. I want to protect a memory region of 64 bytes starting from 0x20000000. I've configured the MPU registers accordingly, but when I write in a protected memory location, MPU does not trigger fault.
Here's a code…
i am a beginner in this subject and i started reading the TRM from the infocenter
one thing confused me
Interrupt grouping in this link it is written as
"Only the group priority determines preemption of interrupt exceptions. When the processor is executing…
Hi,
Currently I'm digging the bus matrix 4x2 bus matrix from

But I have some question.
How does the bus matrix4x2 implement in bus matrix?
I just draw what I've understand it as the below

Am I understanding correctly?
I want to understand internal…
Hi
Now I'm trying to understand about memories in the Cortex design kit.
I came across memory address map of cortex M3 when I googling as the below.
In the image, left one is an AHB memory map, and right one is STM32F103's memory map.
As you…
Hi I was studying the memory system ... and I found three related concepts/topics but I couldn't grasphow these concepts are related to each other and to the AMBA Protocol ... these concepts are : - memory Type - memory Attributes - Monitors and semaphores…
HI.
I'm trying to understand the relationship between UART and printf within retarget.
as I understand, retarget supports to implement low level function fputc, if I want to use printf().
if I am right, I can't still understand the relationship between…
Recently I'm learning the implement of ARM cortex m core in order to optimize my software to be more efficient and be easier to predict its execute time. But now I'm confused about the clock cycle, machine cycle and the pipeline of cortex-m.
…I have looked at the cycle counts for the Cortex M3 instructions at http://infocenter.arm.com/help/topic/com.arm.doc.100165_0201_00_en/ric1414056333562.html. Some instructions are listed as taking a range of cycles to complete. I want to understand what…
Hi, I am new to ARM Cortex M3 Microprocessors. Can somebody please explain me the speculative branching in layman terms.
Thanks in advance.
I'm trying to communicate with a Cortex-M3 based microcontroller (LPC1769) through JTAG. I already have the hardware required, and have managed to get an example program to work, but to progress further, I need to know the device-specific JTAG instructions…
we have two modes which are privileged in ARM cortex M3 .they are Thread privileged and handler mode .
if there is already one privileged mode then why we need the other mode? i mean cant we do work with only one privileged mode?
is there any difference…
Hi Sir,
Can i change Flash Memory Permission through MPU??
Thanks and Regards,
Harshan.
Hi everyone, as I wrote in the title, I'm coming from AVR 8-bit MCUs programming and in the last year I learnt a lot about AVR 8-bit architecture,CPU,registers and so on.
I've done a few projects coding primarily in C and something in Assembly (serial…
Hi all,
I'm trying to understand the LDREX/STREX commands in an ARM Cortex M3 MCU to implement atomic access to various variables (the goal is to implement semaphores/mutexes or increment/decrement shared variables).
There are several ressources available…
Hi Sir,
may be the title of this question looks fun, but i am eagerly waiting for your next book "The Definitive Guide to Cortex M7" are you working on this book?? When could i Expect this book
Thanks and Regards,
Harshan.
Hi folks,
Some weeks ago, I discover the mechanism of IT instruction folding supported by the cortex-M3.
As mentionned in 'Cortex-M3 Devices Generic User Guide', "In some situations, the processor can start executing the first instruction in an IT block…
Hi,
I needed to know where i could get arm cortex m3 soft core. Its for my masters thesis for which i'll be also using Keil uvision 5.
Thanks in advance