SAMV71Q21 Inquiry about FreeRTOS and CAN

Libraries
1

RTOS:FreeRTOSv1000:MemMang 4
AtmelStudio : 7.0.1931
AtmelKits : 7.0.122
AtmelStart : 1.0.161.0
Target Board : SAMV71 Xplained Ultra

Hello.
I have a question about CAN and Heap configuration in FreeRTOS on SAMV71Q21.
I created a project by setting it to FreeRTOS Heap4 in Atmel Start. CAN communication does not work when the configTOTAL_HEAP_SIZE value in the Config / FreeRTOSConfig.h file is set to more than 64K.

During some tests, I found ucHeap [configTOTAL_HEAP_SIZE] in ‘thirdparty \ RTOS \ freertos \ FreeRTOSV10.0.0 \ Source \ portable \ MemMang \ heap_4.c’.
After clearing ‘static’, CAN communication worked.

However, I would like to know a solution that does not require modifying C files because modifying the files generated by Atmel Start is reluctant and I don’t know what side effects will occur.

2

At first whether the heap is static or not would seem unrelated to the CAN comms, so the first thing to do is figure out why it does. I suspect it will result in the heap being in a different memory location. Does the CAN driver allocate memory?

3

The CAN driver uses an internal FIFO and does not allocate a heap.