not able to create three or more tasks in freeRTOS in nrf52832.

RE: not able to create three or more tasks in freeRTOS in nrf52832.

vivek machchhar — Mon, 12 Oct 2020 12:44:07 GMT

Hello,

problem-solved I just increase the heap size. And also look for how to fix hardfault error.

Thank you for your valuable reply.

RE: not able to create three or more tasks in freeRTOS in nrf52832.

www.FreeRTOS.org — Sat, 10 Oct 2020 18:39:56 GMT

The return value of xTaskCreate() will be pdTRUE if the task was created, or pdFALSE if you ran out of FreeRTOS heap so couldn't create the task. You can also use a malloc failed hook to know if you ran out of heap https://www.freertos.org/a00016.html . How you increase the heap depends on which allocation scheme you are using https://www.freertos.org/a00111.html

There is information on debugging a hard fault here https://www.freertos.org/Debugging-Hard-Faults-On-Cortex-M-Microcontrollers.html but more often than not having configASSERT() defined and stack overflow detection on will trap an error before it causes a fault - look through this page of the FreeRTOS FAQ www.freertos.org/Debugging-Hard-Faults-On-Cortex-M-Microcontrollers.html

RE: not able to create three or more tasks in freeRTOS in nrf52832.

awneil — Fri, 09 Oct 2020 13:09:10 GMT

Did you use the debugger to find where, exactly, the Hard Fault occurred?

The Hard Fault mechanism is a standard part of the Cortex-M4 core - not specific to Nordic.

There are many resources on debugging Cortex-M Hard Faults; eg,

https://community.arm.com/developer/ip-products/system/f/embedded-forum/3257/debugging-a-cortex-m0-hard-fault

RE: not able to create three or more tasks in freeRTOS in nrf52832.

vivek machchhar — Fri, 09 Oct 2020 12:07:06 GMT

hello awneil,

I was getting hardfault but I don't know why hardfault error occurred.

00> <info> app: testing FreeRTOS example started.
00> <info> app: task 1 : 0
00> <error> hardfault: HARD FAULT at 0x0002B384
00> <error> hardfault: R0: 0x6B73618C R1: 0x200063B8 R2: 0x2000722C R3: 0x6B73618C
00> <error> hardfault: R12: 0x2000623C LR: 0x0002CB15 PSR: 0x01000000
00> <error> hardfault: Cause: Data bus error (PC value stacked for the exception return points to the instruction that caused the fault).

RE: not able to create three or more tasks in freeRTOS in nrf52832.

awneil — Fri, 09 Oct 2020 11:02:44 GMT

[quote userid="93052" url="~/f/nordic-q-a/66925/not-able-to-create-three-or-more-tasks-in-freertos-in-nrf52832"]only this much of print I got[/quote]

So have you used the debugger to see what's happening ?