This is an agreement between Micro Digital, Inc. (�MDI�) located at 2900 Bristol Street, Suite G204, Costa Mesa, California, USA and �Licensee� as follows:

To license, please email or call (714) 437-7333.
First Name
Last Name

Licensee wishes to use eheap �Software�.

Therefore the parties agree as follows:
1. Software provided to Licensee shall be used only for evaluation, study, or research. Licensee agrees that a license fee is due if Software is to be used in a commercial product.

2. Licensee agrees that Software shall not be used to produce a product serving the same or similar purpose as Software and offered in competition with Software for commercial products, even if distributed free of charge.

3. Licensee agrees that Software, copyrights, and all other proprietary rights remain the property of MDI and that this Agreement transfers no Product ownership to Licensee. All enhancements and modifications are owned by MDI.

4. Licensee shall not disassemble nor reverse engineer Software.
5. Licensee agrees to not remove any legal notices from Software.

6. Software is provided without warranty of any kind. Licensee must assume the entire risk of using Software. This includes any and all damage to persons and property, even as the result of one or more defects in Software.

7. The terms and conditions stated herein are declared to be severable. If any paragraph, provision, or clause in this Agreement shall be found or held to be invalid or unenforceable in any jurisdiction in which this Agreement is being performed, the remainder of this Agreement shall be valid and enforceable.

8. This Agreement shall be governed by the laws of the State of California.

I (Licensee) accept and agree to the above terms and conditions.




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  eheap™ — Embedded Heap

eheap is a bin-type heap that provides adaptability, safety, and high performance for embedded systems running on RTOSes or standalone. It can be tuned to the specific requirements of an embedded system or a partition. It is capable of doing aligned and MPU region allocations, and it has unique debug and self-healing features.

eheap will run on any embedded system, with or without an RTOS. A free evaluation library is available for those who want to try it on their systems (see below).

eheap Features

  • Multiple heap support for secure systems. New
  • Aligned allocations. New
  • ARM Cortex v7M MPU region allocations. New
  • Integral 8-byte and 12-byte block pools. New
  • Configurable number of bins and sizes.
  • Deferred free chunk merging.
  • Bin sort and bin seed.
  • Self healing via bi-directional scanning.
  • Debug chunks and statistics aid debugging.
  • High performance and deterministic operation.
  • Small code and data footprint.
  • RTOS and compiler agnostic.
  • Licensed standalone and as part of SMX.

Technical Papers

eheap vs. dlmalloc

eheap provides high performance, adaptability, and safety for embedded systems. dlmalloc is appropriate for large, non-real-time, data-processing systems. Read More

eheap Part 1:  Configuration

eheap offers many options that allow it to be customized to the specific needs of embedded systems and partitions. In addition, it offers simple multi-heap support. Read More

eheap Part 2:  Enhanced Debugging

eheap provides special features to help debug memory leaks, overflows of buffers and stacks, and other heap problems. Read More

eheap Part 3:  Self-Healing

eheap provides self-healing features to help exposed embedded systems better deal with environmental disturbances, malware, cyber attacks, and other problems. Read More

Other Resources

eheap User's Guide (PDF)

eheap Evaluation Kit and User's Guide   (v5.1.0,  4/11/19,  503 KB)

(Note: Evaluation libraries are built with IAR EWARM. If you use other tools please email

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