Hi

I'm currently porting a non-OS firmware to FreeRTOS 10.2.1.
I re-used a previous FreeRTOS /systemview setup that was working fine on an other project / mcu (but still cortex-M).

Program has 3 tasks + 2 timers.


My firmware seems to work as expected but when I enabled SystemView I saw that new tasks appeared out of the blue (task 0x1C06, 0XFCO, ...)
This seems to happens only after some IRQ

I think there is a "leak" somewhere but I don't know how to look for it. Any advice ?

I used SystemView 3.12

After some investigations, I found that

• SystemView timing is completely off (~250ms between 2 logs send by a timer triggered every 1.5s) but "real" timing is ok (check with an oscillo)
  
• All the previous issues are not present if I disable the tickless mode.
  

I use a custom tickless mode where I go in stop mode 2 and I'm wake up either by an interrupt or a RTC timer.

It seems "normal" that timing is off in tickless because system timestamp (Cortex-M cycle counter.) is stop while I'm in tickless.
I'm suppose I will need to redefine SEGGER_SYSVIEW_GET_TIMESTAMP in order to get correct timing in tickless mode ?



Is it possible that the weird task problem is also linked to my tickless mode ?