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Thread safe isn't the same as interrupt safe.
If you want to call a function (that uses shared data) from an interrupt, you have do disable the interrupt whenever you are modifying the shared data.
What you seem to have been doing is putting the current thread to sleep from within an interrupt handler. This is illegal for all OS I know about.
I don't know anything about uC/OS, but calling stdio functions from interrupt routing is almost certainly illegal.
There might be something like a kernel printf() that is interrupt safe - for writes to the console.
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Hi dsl, I think I am not violating the rule that you mention. I do not call printf from my interrupt routine. Within my interrupt routine I am posting a message into a message que to another task. That task pends this message and from there a call to printing debug information is done...
In fact.. .from that task I call one of the example printf() functions mentioned above...
regards!
Honored Contributor
