General FreeRTOS 7.5.0 tackles Cortex-A9 and MISRA

General FreeRTOS 7.5.0 tackles Cortex-A9 and MISRA

2013/08/08

The FreeRTOS real-time kernel now embraces ARM Cortex-A9.

Now at version 7.5.0, other changes include core components which pass Lint’s MISRA rule checks, more API functions, and low power trace.

“Version 7.5.0 is a major new version that includes many efficiency improvements, including optimisations that target the code that runs most frequently. Other enhancements include the elimination of unnecessary task switches,” said Real Time Engineers, the firm behind the RTOS.

This is the first release to contain official Cortex-A9 support, for which ports are provided for both the IAR and ARM tool chains, taking the number of supported architectures to 34.

Also included are Renesas RZ and Microsemi SmartFusion2 demonstrations that make use of the FreeRTOS+FAT SL DOS compatible file system.

“To maintain the ethos of ease of use, v7.5.0 is backward compatible with all previous 7.x releases, enabling its benefits to be obtained by simply dropping the updated source files into existing projects,” said the firm. “It adds API functionality that has been requested by users, such as simplifying the gathering of state information and run time statistics.”

FreeRTOS has always emphasised coding standards as one means to ensure product quality, its original author having direct experience with the production of aerospace software.

“Users can take confidence in the fact that version 7.5.0 core source files do not generate any warnings when statically checked by Lint. The details of the test conditions will be published on the FreeRTOS.org website,” said Real Time Engineers, adding that FreeRTOS+Trace kernel trace functionality now includes trace macros which allow the visualisation and optimisation of the recently introduced low power tick-less operation mode.

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