zephyr

History

Torsten Rasmussen 1cccc8a8fe cmake: increase minimal required version to 3.20.0 Move to CMake 3.20.0. At the Toolchain WG it was decided to move to CMake 3.20.0. The main reason for increasing CMake version is better toolchain support. Better toolchain support is added in the following CMake versions: - armclang, CMake 3.15 - Intel oneAPI, CMake 3.20 - IAR, CMake 3.15 and 3.20 Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>		2021-08-20 09:47:34 +02:00
..
src	…
CMakeLists.txt	…
README.rst	…
prj.conf	…
sample.yaml	…

README.rst

.. _spiram_test:

Espressif ESP32 SPIRAM test
###########################

Overview
********

This sample allocates memory from internal DRAM and SPIRAM by calling `k_malloc`, frees
allocated memory by calling `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.

Building and Running
********************

Make sure you have the ESP32_WROVER_KIT connected over USB port.

.. code-block:: console

   west build -b esp32 samples/boards/esp32/spiram_test
   west flash --esp-device /dev/ttyUSB0

Sample Output
=============

To check output of this sample, any serial console program can be used (i.e. on Linux minicom, putty, screen, etc)
This example uses ``picocom`` on the serial port ``/dev/ttyUS0``:

.. code-block:: console

    mem test ok! 209
    SPIRAM mem test pass
    mem test ok! 194
    Internal mem test pass