Products       Learn       Buy       Support       Company
  Home > News > Press Center


Micro Digital Announces eheap™ Enhancements

Costa Mesa, California, April 25, 2019 — Micro Digital is pleased to announce new eheap enhancements. eheap is a heap manager designed specifically for embedded systems. New features are:

  • Multiple heap support.
  • Aligned allocations.
  • ARM Cortex‑v7M MPU region allocations.
  • Integral 8-byte and 12-byte block pools.

eheap can efficiently support any number of heaps. Each can be independently configured to support tiny to very large heaps, each with an appropriate number of bins and other features. Having multiple heaps is essential for achieving 100% isolation of partitions in secure systems.

Allocations can be aligned on any power-of-two boundary from 8 up to a specified maximum. Allocation efficiency is improved by accumulation of spare space in chunks ahead of chunks with aligned blocks. This also results in steady growth of aligned blocks, which improves aligned allocation performance.

eheap supports ARM Cortex-v7M MPU region allocations, thus permitting dynamic region creation at run time. This is simpler and more flexible than static region creation at compile time. To do this, allocated regions must have power-of-two sizes and be aligned on their sizes. eheap uses subregions to greatly improve the efficiency of region allocations.

Integral block pools have been added to greatly improve speed and efficiency of small-block allocations for object-oriented languages such as C++. The pools operate like normal heap operations and if a pool becomes empty, blocks are transparently allocated from the main heap. Thus block pools can be sized for normal, rather than peak requirements.

These new features add to previously announced eheap features:

  • Configurable number of bins and sizes to support a wide range of RAM sizes.
  • Deferred free chunk merging.
  • Bin sort and bin seed.
  • Self-healing via bi-directional scanning.
  • Debug chunks and statistics to aid debugging.
  • High performance and deterministic operation.
  • Small code and data footprint.
  • RTOS and compiler agnostic.
  • Licensed standalone and as part of SMX.

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 at

Availability and Licensing

eheap is available now. It is part of SMX RTOS and is also offered for use with other RTOSes and standalone. It is licensed for $2,000 per developed product and includes full source code, 3 months of technical support, and no per-seat charges. All of Micro Digital’s software is licensed royalty-free with a 30-day money-back guarantee.

About SMX

The focus of the SMX RTOS, and the smx kernel in particular, is to increase safety, security, and reliability of embedded systems, and to offer features, tools, and support needed to ease application development so projects finish on time.

About Micro Digital

Micro Digital, Inc. has been in the embedded systems business for 44 years and has been producing and selling embedded software products for 30 years. Micro Digital is dedicated to providing quality products and support for embedded systems at moderate prices. We may be contacted at (714) 437-7333 or

Trademarks used above are the properties of their respective owners.
eheap is a trademark and SMX is a registered trademark of Micro Digital, Inc.

back to Press Center

Press contact:
Betty Martin-Danner
Home       Sitemap       Contact