SPIRAM

Overview

This sample shows how to allocate memory from SPIRAM by using shared_multi_heap_aligned_alloc() with SMH_REG_ATTR_EXTERNAL attribute. Checks if the memory was correctly allocated then frees it by calling shared_multi_heap_free(). It also allocates memory from internal memory and checks if the address range is correct.

Supported SoCs

The following SoCs are supported by this sample code so far:

ESP32
ESP32-S2
ESP32-S3

Building and Running

Make sure you have your board connected over USB port.

west build -b esp32s3_devkitm/esp32s3/procpu samples/boards/espressif/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:

$ west espressif monitor

*** Booting Zephyr OS build v3.7.0-446-g93c9da66944c ***
SPIRAM mem test pass
Internal mem test pass