Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT Training




Loading

Strange Task Swithching

Posted by Nobody/Anonymous on May 12, 2006
Hey

Can someone explain to me why this wont work. I have the following 2 tasks

static portTASK_FUNCTION( task_0, pvParameters )
{

(void) pvParameters;

for(;;)
{

if(Interupt_Occured)
{
//processInterupt();
}

}

static portTASK_FUNCTION( task_1, pvParameters )
{
(void) pvParameters;

for(;;)
{

PORTA=0xFF;//turn LEDs on
vTaskDelay(1000)//wait 1 second
PORTA=0x00;//turn LEDS off
vTaskDelay(1000)//wait 1 second

}

}

They are both create with equal porities and pre-emtion is set to 1 in FreeRTOSCongig.h

When i run this, the lights do not flash.

If i add a vTaskDelay(1); into the for loop of task_0 they flash.

Can someone explain why?

Cheers

Murray

RE: Strange Task Swithching

Posted by Nobody/Anonymous on May 12, 2006
Strange. Could it be that you have not done a complete rebuild since changing the portUSE_PREEMPTION to 1?

RE: Strange Task Swithching

Posted by Nobody/Anonymous on May 12, 2006
I always do a make clean all


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




Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.


Free TCP/IP and file system demos for the RTOS


Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

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

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

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

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists