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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 Cortex m0+? Isn't it needed for ISR wrapper?Posted by thegi on January 10, 2014 Hi, I found that on Cortex M0 or on Cortex M3 GCC ports, there is no api for portSAVECONTEXT or port RESTORECONTEXT. I guess the task can handle context switching without those api's in arm architecture, but what about ISR? Don't I need to wrap my ISR functions with portSAVECONTEXT and portRESTROECONTEXT, if a context switch will occur inside my ISR function? If so, how should I define my own portSAVECONTEXT and portRESTORECONTEXT for cortex m series? Thanks, GI portSAVE_CONTEXT not used in Cortex m0+? Isn't it needed for ISR wrapper?Posted by rtel on January 10, 2014 No they are not needed. Please read the "Interrupt Service Routines" section of any of the Cortex M0 or M3 documentation pages, and refer to the many examples provided. Regards.
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NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
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