Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem


Loading

Problem with vPortStartFirstTask();

Posted by A. Kleist on July 5, 2011
Hi,

I've been working with a project using RTOS, and it has been working great.
But when I'm increasing the size of an array in a task, it ends up in a Reset_Handler when I'm trying to debug :(
- I've tried to change the usStackDepth, without any luck :(

It seems to be the function vPortStartFirstTask(); which causes the Reset_Handler.

I'm using Ride7 to work on a STM32f013 chip.

Hope to get some help from you guys - thanks :)

Best regards


RE: Problem with vPortStartFirstTask();

Posted by Dave on July 5, 2011
If you try and store an array on the stack then the stack will have to be much larger than the size of the array itself. It is best to avoid putting arrays on the stack if the array is more than a few bytes. If the function does not have to be reentrant, then just declare the array static.

RE: Problem with vPortStartFirstTask();

Posted by A. Kleist on July 5, 2011
Oops! My bad! I was a bite too fast on the keys, the array is not declared in the task, buf in a seperate file.
The arrays are accesed by pointers in the tasks.

usart.h
#define bufSize 512


struct bufStruct
    {
    u16 head;
    u16 tail;
    u8 buf[bufSize];
    };



static struct bufStruct t = { 0, 0, };
static struct bufStruct r = { 0, 0, };


e.g in a task:

struct bufStruct *p = &r;
u8 valueInBuf = p->buf[p->head];



[ Back to the top ]    [ About FreeRTOS ]    [ Privacy ]    [ Sitemap ]    [ ]


Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.

Meet Richard Barry and learn about running FreeRTOS on RISC-V at FOSDEM 2019

Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed.

View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.


Careers

FreeRTOS and other embedded software careers at AWS.



FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Espressif ESP32

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Renesas

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS

Xilinx Microblaze and Zynq partner