configuration of the FRAM (FM20L08)

Hmmm... That makes no sense. The call to task_wait should cause an immediate scheduling pass, and some
other task should get a full 1ms at that point. When the next scheduling pass happens, your high-priority task will
come back in until it calls task_wait again.

Could it be that it's always the same low-priority task that comes in, and all your other low-priority tasks get starved?
That should not happen, and I doubt that such a basic bug could survive in the task-scheduler until now, but who knows?

One other thought - how are you calling task_wait? Are you using 0 for the task_id, or are you using an actual task ID?
If so, could you be using the wrong task ID? You should probably just use 12.

Also, task_wait takes a signal-mask as an argument. If those signals are already triggered, task_wait may just return
immediately without causing a scheduling pass.

If you don't need the signals, you should probably use task_sleep(0,1,4,1,7); instead.

Hmmm... That makes no sense. The call to task_wait should cause an immediate scheduling pass, and some
other task should get a full 1ms at that point. When the next scheduling pass happens, your high-priority task will
come back in until it calls task_wait again.

Could it be that it's always the same low-priority task that comes in, and all your other low-priority tasks get starved?
That should not happen, and I doubt that such a basic bug could survive in the task-scheduler until now, but who knows?

One other thought - how are you calling task_wait? Are you using 0 for the task_id, or are you using an actual task ID?
If so, could you be using the wrong task ID? You should probably just use 12.

Also, task_wait takes a signal-mask as an argument. If those signals are already triggered, task_wait may just return
immediately without causing a scheduling pass.

If you don't need the signals, you should probably use task_sleep(0,1,4,1,7); instead.

"Hmmm... That makes no sense."

You're dead right there!

What do you think you were replying to...?