All Questions
44
questions
0
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0
answers
47
views
Unwinding Stack on Cortex-M with FreeRTOS: Handling Interrupts and Stopping Conditions
I am writing an unwinder for a Cortex-M (an ARM processor) running FreeRTOS. It mostly works, and I can trace the stack in many cases, but I have encountered a few issues that I haven't been able to ...
0
votes
1
answer
41
views
Taking FreeRTOS as an example, how to separate the kernel from the application? (Physical)
enter image description hereBackground: FreeRTOS, Cortext-M3
Suppose there is a situation where the kernel and application are developed separately, and the .text segment of the kernel and the ...
2
votes
0
answers
82
views
Embedded C++ - Header-only library optimization level
I mainly develop firmware for ARM Cortex M using gcc and I am migrating from C to C++ and even though I am overall happy with the transition, there are some things that I just can't get right.
...
- 31
0
votes
0
answers
55
views
FreeRTOS Faults on Optimization
Environment
The dev environment is Microchip (ex-Atmel) Studio. The target processor is a ATSAMC21G18A on a custom PCB. FreeRTOS version 8.0.1 is being used, being provided directly by ASF.
How ...
- 103
0
votes
1
answer
72
views
Implementing Plugin Functionality in Firmware using FreeRTOS, LittleFS, and gcc-arm-none-eabi
I am currently working on a project involving firmware development for Cortex-M microcontrollers (NXP RT1175). My development stack includes FreeRTOS, LittleFS, and the gcc-arm-none-eabi toolchain. I ...
- 1,408
0
votes
1
answer
232
views
Interrupt in TICKLESS_IDLE mode of FreeRTOS
I have some questions about tickless idle mode in FreeRTOS.
Does systick work in this mode, or systick just stop working when __WFI() has called and work again right after exiting __WFI() ?
Calling ...
- 55
0
votes
1
answer
161
views
Cortex M4 invalid frame address during Hardfault
I'm trying to debug a Hardfault I'm getting at my Cortex-m4 MCU (ATSAM4E16). I've been reading https://interrupt.memfault.com/blog/cortex-m-hardfault-debug and https://www.freertos.org/Debugging-Hard-...
- 13
0
votes
1
answer
111
views
On STM32L476, should I still use a mutex to guard a single byte variable if ARMv7-M guarantees single-copy atomicity for byte length variables?
I am using an STM32L476 with CMSIS OS2 which implements FreeRTOS v10.3.1.
The L4 is a Cortex-M4 MCU which implements ARMv7E-M architecture: https://en.wikipedia.org/wiki/ARM_Cortex-M
The difference ...
0
votes
2
answers
134
views
Rust interop with FreeRTOS causes INVSTATE HardFault
I am working on an STM32F4 project with code generated by STM32CubeMX. In order to add some Rust to my project, I have ported the Makefile to CMake and am then using Corrosion to build and link a Rust ...
- 4,061
0
votes
1
answer
127
views
Cortex-M0+ (STM32G0B1RETx) sometimes not returnig from function and executing next instructions
I've a strange problem with Cortex-M0+ (STM32G0B1RETx) when running FreeRTOS (10.3.1 heap3) and gui using lvgl (v8.3), toolchain GNU Tools for STM32 9-2020-q2-update, configuration generated from ...
0
votes
0
answers
511
views
i have a problem while using FreeRTOS with keil
i am using keil version 5 and i install all the packages that needed to run freeRTOS on it. but it always gives me an error with portmacro.h
here is some error lines:
C:/Users/Mohamed Radwan/AppData/...
1
vote
1
answer
275
views
FreeRTOS is slow to wake after long processor sleep
(Cross-posted on Electrical Engineering Stack Exchange)
I'm using FreeRTOS in an application which requires the processor to sleep in low power mode for a long time (as long as 12 hours), then wake up ...
- 199
0
votes
0
answers
510
views
UART interrupt on ARM Cortex-M0 not triggering while utilizing FreeRTOS
I am using an STM32F0 with the following std_periph_lib api functions to configure and execute a UART transmit from a FreeRTOS queue.
// Initialization
{
USART_InitTypeDef usart_init;
...
- 63
0
votes
0
answers
160
views
ARM Cortex-M3 NVIC config with FreeRTOS
I'm working on a legacy projected using FreeRTOS v7.3.0 on an STM32F205 Cortex-M3, built with IAR EWARM v6.70.
My system intermittently lands in the hard fault exception handler, and/or watchdog ...
- 1
3
votes
0
answers
994
views
xQueueReceive blocks the execution of other tasks
I am developing a FreeRTOS application on a Cortex-M4 (NXP i.MX8MM) that creates 4 tasks.
The first task is waiting to receive a character on a UART. As soon as a buffer is received, it is sent to ...
- 352