ESP32 Forum

My program always crash when using large arrays(100*1024),serial Prompt information:

Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception)
Register dump:
PC : 00000000 PS : 00000000 A0 : 00000000 A1 : 8007838d
A2 : 3ffe3c60 A3 : 50000008 A4 : 3ff0005c A5 : 00000000
A6 : 00000009 A7 : 00020010 A8 : 80078506 A9 : 00030000
A10 : 3ffe5650 A11 : 3ffe5650 A12 : 00000000 A13 : 80078506
A14 : 3ffe3ca0 A15 : 40080a2c SAR : 000008e

What's the problem?

Hi star_7,

Please post new topics when asking a new question, rather than replying to unrelated topic. I've split your post into a new topic.

If your array is allocated on the stack, you will need to make sure your task has a large enough stack. The third parameter to xTaskCreate() specifies the stack size.

If your array is allocated in heap with malloc(), you should test for a NULL result. For some large arrays, malloc() may fail if there is not enough contiguous memory available. It sounds like you are allocating on the stack, though.

Angus

To add a little to what Angus said ... I like to also use the esp_get_free_heap() function which returns the current amount of free heap storage. You can't dynamically allocate more free space than what is available as returned by that function.