SYS - MemInfo

Materials

  • AmebaD [AMB21 / AMB22 / AMB23 / AMB25 / AMB26 / BW16 / AW-CU488 Thing Plus] x 1

Introduction

This example demonstrates how to monitor the current OS free heap size on the Ameba board using FreeRTOS.

FreeRTOS uses a memory heap for dynamic memory allocation and creating threads. Monitoring the heap size is important because a low heap size can lead to allocation failures and abnormal behavior.

Procedure

Step 1. Open Example

Open the example: “Files” → “Examples” → “AmebaSys” → “MemInfo”

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Step 2. Upload Code

Upload the code and open the Serial Monitor.

The output will show the available heap size before and after memory allocation and freeing:

  • Initial free heap size

  • Free heap size after allocating 1000 bytes

  • Free heap size after freeing the memory

This helps you understand how dynamic memory usage affects available heap space at runtime.

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Note

If the available heap size becomes too low, and memory is allocated beyond what is available, the allocation will fail.

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