topic Re: Strange problem with tasks in MQX Software Solutions

Strange problem with tasks

master_szumi — Fri, 02 Mar 2012 18:26:32 GMT

My problem is vey strange.

I started my multi-task application on mqx - and it works fine a while.

After few minutes only one task is active infinitely.

In that task is line: _time_delay(...) so other task shoud be used then.

I look to "Task summary" and "Stack usage" and everything is ok (other tasks are "Ready" and stack is not overflow).

What shoud I check more?

Re: Strange problem with tasks

master_szumi — Fri, 02 Mar 2012 20:57:31 GMT

It seems that scheduler works wrong.

In mqx project i'm using:

#define BSP_ALARM_FREQUENCY (1000)

It may cause that kind of problem?

Re: Strange problem with tasks

PhilH — Sat, 03 Mar 2012 06:10:48 GMT

The 1000 value is not the problem (I have used it just fine but it adds a bit more clock overhead). I would guess that your code has some other loop that is spinning. I would look carefully at the code to locate it. If you use the default task scheduling, you will not give up the processor unless a higher priority task is ready to run. What are the priorities of the task that is ready that is not running? My guess is they have the same priority.