MicroEJ Time Abstraction Layer implementation for FreeRTOS.

This module implements the microej_time.h APIs for VEE Ports connected to a Board Support Package based on FreeRTOS.

Important note: this implementation is based on the FreeRTOS tick, which is correct for evaluation but not as precise as a hardware timer. Consider changing this implementation to a hardware-timer-based implementation if you need precision under the millisecond.

These sources can be included in the VEE Port with the method you prefer, by using this repository as a submodule or by doing a copy of the sources in the VEE Port repository.

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This abstraction layer has been tested on the following configurations

• Hardware
  • ESP32-S2-Saola (Tested up to 0.1.0 release)
  • i.MX RT1170 Evaluation Kit
• Compiler / Build environment
  • xtensa-esp32-elf-gcc 8.4.0 / ESP-IDF v4.2.2 (Tested up to 0.1.0 release)
  • MCUXpresso SDK 2.15.0 for i.MXRT1170-EVKB (using GNU GCC toolchain)
• RTOS
  • FreeRTOS 8.2.0 (Tested up to 0.1.0 release)
  • FreeRTOS 10.4.3

This Abstraction Layer implementation is MISRA-compliant (MISRA C:2012) with some noted exception. It has been verified with Cppcheck v2.10. Here is the list of deviations from MISRA standard:

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This implementation is not compatible with FreeRTOS tickless idle mode.

Copyright 2022-2025 MicroEJ Corp. All rights reserved.
Use of this source code is governed by a BSD-style license that can be found with this software.