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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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portSAVE_CONTEXT not used in some MPUsPosted by Magnus Kriel on March 27, 2012 I am trying to implement the dsPIC port of FreeRTOS. I am using the PIC32 edition Realtime Kernel reference manual as it was the closest to dsPIC33. In the manual they show code listings of interrupts that call the portSAVE_CONTEXT and portRESTORE_CONTEXT upon entering and exiting the ISR respectively. In the demo code for the dsPIC33 the portSAVE_CONTEXT and portRESTORE_CONTEXT are not called in the USART interrupts. The demo code does make use of the taskYield however. Why is portSAVE_CONTEXT and portRESTORE_CONTEXT not used in the dsPIC33 and other MPU demos and why is it used in other cases When do I need to use it? Thanks in advance RE: portSAVE_CONTEXT not used in some MPUsPosted by Richard on March 27, 2012 You don't need to call those macros at all in the PIC24/dsPIC port - the kernel will take care of it. I recommend reading the "Configuration and Usage" section of the following page: http://www.freertos.org/portpic24_dspic.html The demo application should also contain example interrupt service routines (probably for a UART at least) that you can use as a reference, and copy. Regards.
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