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

portSWITCH_CONTEXT on AT91SAM7S64 port

Posted by Eduardo Goncalves on March 13, 2009
On an interrupt routine I'll have to use:

portSWITCH_CONTEXT

as state on the FreeRTOS book:

xQueueSendToBackFromISR( CANopenQueue_handle, &msg, &xHigherPriorityTaskWoken );
if( xHigherPriorityTaskWoken == pdTRUE )
/* NOTE: The actual macro to use to force a context switch from an ISR is
dependent on the port. This is the correct macro for the Open Watcom DOS
port. Other ports may require different syntax. Refer to the examples
provided for the port being used to determine the syntax required. */
portSWITCH_CONTEXT();

As such portSWITCH_CONTEXT is port dependent. I cannot find this function in the port of AT91SAM7S64.

I found some function with close names on portasm.s79:

portRESTORE_CONTEXT
portSAVE_CONTEXT

What function should be used to provide the portSWITCH_CONTEXT functionality?

thanks

RE: portSWITCH_CONTEXT on AT91SAM7S64 port

Posted by Forest YU on March 13, 2009
May be you read an old api file, the new function name is portYIELD_FROM_ISR(). It can be used like this:
if( xHigherPriorityTaskWoken )
{
portYIELD_FROM_ISR();
}

regards.


[ 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