RTOS-independent implementation of exFAT file system

14th February 2019
Posted By : Alex Lynn
RTOS-independent implementation of exFAT file system

Long-time experts in developing file systems for deeply embedded systems, HCC Embedded (HCC), has signed an agreement with Microsoft to license its RTOS-independent exFAT file system implementation to device manufacturers with a direct patent license from Microsoft. 

HCC’s standard exFAT implementation gives developers a deeply embedded optimised solution that will run with any RTOS, as well as the flexibility to achieve the optimal balance among resource usage, performance, and cost for their applications. In August 2019, HCC will release its failsafe version of exFAT that will provide developers an easy upgrade path to improved storage reliability.

HCC’s exFAT solution is the latest addition to its broad range of file system and flash management products for building highly reliable embedded systems. With a direct patent license from Microsoft, HCC enables its device partners to get to market more quickly and economically than with separate agreements. HCC’s exFAT will run with virtually any RTOS so that device manufacturers using Linux, FreeRTOS, or bare metal systems can use the same code on all their designs and be assured of the same high-quality results.

The Microsoft proprietary exFAT file system is optimised for flash memory such as USB flash drives and SD cards. Adopted by the Secure Digital (SD) Card Association card organisation as the standard format for high-speed SDXC cards with over 32GB capacity, exFAT enables smart design decisions and performance trade-offs when using a low-cost microcontroller with limited resources. HCC exFAT is fully compatible with the Microsoft exFAT specification, providing seamless portability between customer devices and exFAT supporting host systems like Windows10.

“HCC has the industry’s broadest range of file system software, and we’ve been providing RTOS-independent file systems to the deeply embedded space for 15-plus years,” said HCC CEO Dave Hughes. “The licensing agreement with Microsoft continues our tradition of providing customers with highly efficient and reliable software. In addition, this summer we will introduce a failsafe version for customers who need the highest assurances that do not lose any data.”

HCC specialises in failsafe file systems through offerings that can be used with all kinds of standard media including SD/ MMC/ SDHC/ SDXC cards, disk drives, Compact Flash, USB drives and other types of external storage. The exFat implementation specifically targets manufacturers of devices that require large amounts of storage to SD cards, or high-speed SDXC cards requiring disk sizes greater than 32GB or file sizes larger than 4GB.


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