Kinetis Microcontrollers中的主题 Re: FreeRTOS allocation problem

FreeRTOS allocation problem

john71 — Wed, 25 Jul 2018 12:14:34 GMT

I use MK10FN1M0xxx12.

I create two tasks

FRTOS1_xTaskCreate((TaskFunction_t)operation_task, (signed char*) "tx", 1024, NULL, 1, NULL); FRTOS1_xTaskCreate((TaskFunction_t)log_managment_task, (signed char*) "rx", 512, NULL, 1, NULL);

It runs OK.

But if I increase the stack size

FRTOS1_xTaskCreate((TaskFunction_t)operation_task, (signed char*) "tx", 1024, NULL, 1, NULL); FRTOS1_xTaskCreate((TaskFunction_t)log_managment_task, (signed char*) "rx", 1024, NULL, 1, NULL);

I fall into FRTOS1_vApplicationMallocFailedHook

And I have #define configTOTAL_HEAP_SIZE (24576) /* size of heap in bytes */

How to fix the problem?

Re: FreeRTOS allocation problem

john71 — Wed, 25 Jul 2018 12:42:58 GMT

Sorry. Found the problem. Should increase heap size #define configTOTAL_HEAP_SIZE (32768)

Re: FreeRTOS allocation problem

danielchen — Wed, 25 Jul 2018 14:05:00 GMT

Thanks for sharing.

Regards

Daniel

Re: FreeRTOS allocation problem

BlackNight — Wed, 25 Jul 2018 14:56:49 GMT

Hi,

just a comment:

xTaskCreate((TaskFunction_t)operation_task, (signed char*) "tx", 1024, NULL, 1, NULL);

this means you actually are requesting 4KB (4*1024 bytes) of stack space.

This of course depends on your application, but is rather high, and you maybe only wanted to reserve 1024 bytes of stack?

Erich

Re: FreeRTOS allocation problem

john71 — Mon, 30 Jul 2018 16:02:19 GMT

I see. Thank you.