Is Event (ISR routine) thread-safe?

[davidzhou]

Hi,

I have a general threading question: (K60 MCU)

Let say SPI module is setup and enabled with interrupt. The interrput is serviced through module Event:

void SM1_OnBlockSent(LDD_TUserData *UserDataPtr) {

      //

     iSharedVariableCmdSentDone=1;

}

is the accessing of the iSharedVariableCmdSentDone thread-safe in the SM1_OnBlockSent() ?

Thank you,

David Zhou

[TICS_Fiona · Accepted solution]

Hello David

The global variables in ISR routines generated by PE are not thread-safe. The ISRs are not reentrant functions. User needs to pay attention in his application code to protect the data. 

Best Regards

Fiona Kuang

Technical Information & Commercial Support

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[davidzhou]

Fiona,

Thank you for your answer.

David Zhou