Quality RTOS & Embedded Software

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




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

Latest News

FreeRTOS kernel V10 is available for immediate download. Now MIT licensed.


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

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