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Which FreeRTOS Function To Use?

Posted by rog57 on March 11, 2013
After reading throught the FreeRTOS "A Guide..." I'm still unsure just the right way to implement what I'm needing to do, and hoping for some advice. It's fairly straightforward:

Task 1 runs every 30 seconds.
When Task 2 runs, I need to suspend just Task 1 (no other task) until Task 2 is complete.

What's the best way to do this?

Thank you for any tips on implementing this.

RE: Which FreeRTOS Function To Use?

Posted by rog57 on March 11, 2013
BTW - I should have noted that Task 2 runs non-scheduled (non-deterministic)

RE: Which FreeRTOS Function To Use?

Posted by Friedrich Lobenstock on March 11, 2013
If task 1 can be suspended at any time, then just
assign task 2 a higher priority and it will suspend
task 1 every time it runs.

RE: Which FreeRTOS Function To Use?

Posted by Richard Damon on March 12, 2013
It isn't totally clear what you mean, as, has been commented, if Task 2 has a higher priority than Task 1, then when ever task 2 is running task 1 is not (since FreeRTOS doesn't to my knowledge support multi-core processors). If what you mean is that every time you create a copy of Task2 with vTaskCreate or signal a semaphore/queue that Task2 is waiting on, you want Task 1 suspended until Task2 gets ready to end/block again, then use vTaskSuspend/Resume in Task2, with Task 1 as the target.

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