[RTOS Support] FreeRTOS book update from 1.0.1

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FreeRTOS book update from 1.0.1

Posted by Eduardo Goncalves on March 20, 2009

Regarding the book is there any update that includes the new handling of ISRs?

The version of the FreeRTOS book we have is 1.0.1

thanks

RE: FreeRTOS book update from 1.0.1

Posted by Richard on March 20, 2009

The book is currently at revision 1.0.5 but really the only things to change are minor typos and references.

Which new ISR handling are you referring to. Nothing in that respect has changed.

Regards.

RE: FreeRTOS book update from 1.0.1

Posted by Eduardo Goncalves on March 20, 2009

the construction of an ISR seems to be different than the one described in the book. Maybe it is only just processor dependent...

===============================================
See "an example of an ISR with context switching capabilities" on the following page and all will be clear: http://www.freertos.org/portsam7iar.html
===============================================

In the book, some examples for ISRs are declared using __interrupt so no need for an assembly file with the code:

CAN_int:
portSAVE_CONTEXT ; Call portSAVE_CONTEXT macro first
bl CAN_int_C ; Then call the function written in the C file.
portRESTORE_CONTEXT ; Call portRESTORE_CONTEXT last.