.. _spiram_test:
Espressif ESP32 SPIRAM test
###########################
Overview
********
This sample allocates memory from internal DRAM and SPIRAM by calling
:c:func:`k_malloc`, frees allocated memory by calling :c:func:`k_free` and
checks if memory can be allocated again. Capability of allocated memory is
decided by ESP_HEAP_MIN_EXTRAM_THRESHOLD. If size is less than
ESP_HEAP_MIN_EXTRAM_THRESHOLD, memory is allocated from internal DRAM. If
size is greater than ESP_HEAP_MIN_EXTRAM_THRESHOLD, memory is allocated from
SPIRAM.
Supported SoCs
**************
The following SoCs are supported by this sample code so far:
* ESP32
* ESP32-S2
Building and Running
********************
Make sure you have your board connected over USB port.
.. code-block:: console
west build -b esp32 samples/boards/esp32/spiram_test
west flash
If using another supported Espressif board, replace the argument in the above
command with a proper board name (e.g., `esp32s2_saola`).
Sample Output
=============
To check output of this sample, run ``west espressif monitor`` or any other serial
console program (e.g., minicom, putty, screen, etc).
This example uses ``west espressif monitor``, which automatically detects the serial
port at ``/dev/ttyUSB0``:
.. code-block:: console
$ west espressif monitor
.. code-block:: console
mem test ok! 209
SPIRAM mem test pass
mem test ok! 194
Internal mem test pass
681e3a16c7