topic Re: Is Event (ISR routine) thread-safe? in CodeWarrior for MCU

Is Event (ISR routine) thread-safe?

davidzhou — Fri, 15 Apr 2016 18:04:38 GMT

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

Re: Is Event (ISR routine) thread-safe?

TICS_Fiona — Mon, 18 Apr 2016 03:09:04 GMT

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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Re: Is Event (ISR routine) thread-safe?

davidzhou — Mon, 18 Apr 2016 12:29:19 GMT

Fiona,

Thank you for your answer.

David Zhou