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-ChibiOS 3.0 is now composed of several independent but inter-operable sub-projects: RT, NIL, HAL.

-

-ChibiOS 3.0 general highlights

-

-- New files tree organization makes the system more modular.

-- A community-contributed code area is now part of the files architecture, it will allow for easier integration of contributed code without much screening.

-- Improved startup files, scatter files and build system.

-- New licensing options.

-- Free ChibiStudio IDE support.

-

-What's new in RT 3.0

-

-- MISRA 2012 compliant.

-- Entirely static for enhanced safety.

-- System data is now encapsulated in a single "ch" global structure for enhanced safety.

-- System integrity check runtime functionality for enhanced safety.

-- Tick-less kernel mode helps implement ultra-low-power devices.

-- High Resolution Virtual Timers module allows to specify very short intervals.

-- High Resolution system time.

-- Clock-cycle accurate Time Measurement module.

-- Clock-cycle accurate polled delays.

-- Statistic module provides high resolution measurement of threads, ISRs and critical zones.

-- New recursive locks in addition to the classical critical zone primitives.

-- New recursive mode for Mutexes.

-- Enhanced suspend/resume mechanism for threads.

-- CMSIS-compliant ARM Cortex-Mx port.

-- CMSIS RTOS API available.

-- Multi-compilers architecture for ports.

-- Codebase now compatible with GCC link time optimizations.

-

-What's new in HAL 3.0

-

-- MISRA 2012 compliant.

-- HAL is now entirely licensed under Apache 2.0 license.

-- HAL has been decoupled from RT. It can now be adapted to any reasonable RTOS or even used with no RTOS at all thanks to a new abstraction layer named OSAL. OSAL implementations are provided for RT, NIL, bare metal ARM Cortex-Mx cores, bare metal Power e200z cores.

-- New driver models for ST, I2S, DAC.

-- Revamped ADC, ICU, PWM, RTC, SDC, USB drivers.

-- Greatly improved STM32 family support, all sub-families have been added.

-- Support for new families expanding (Kinetis, Tiva, SPC5xx, RL78, RX62N).

-- Streams, channels, files and block devices abstract interfaces.

-

-New addition NIL 1.0

-

-- MISRA 2012 compliant.

-- Entirely static for enhanced safety.

-- No linked lists anywhere in the code for enhanced safety.

-- System data is encapsulated in a single "nil" global structure for enhanced safety.

-- Tick-less kernel mode helps implement ultra-low-power devices.

-- Ultra compact kernel, well below 1kB in its maximum configuration.

-- Upward compatible with RT, it implements a subset of the RT API.

-- Reduced RAM usage, 20-28 bytes for task and just 4 bytes for a semaphore on 32 bits architectures, half of that on 8/16 bits architectures.

-- ARM Cortex-Mx port based on CMSIS architecture.

-- Multi-compilers architecture for ports.