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@@ -1,4 +1,4 @@
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-Documentation and download available at http://www.FreeRTOS.org/
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+Documentation and download available at https://www.FreeRTOS.org/
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Changes since the last release:
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+ Added xTaskCatchUpTicks() which corrects the tick count value after the
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@@ -19,6 +19,147 @@ Changes since the last release:
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configISR_STACK_SIZE_WORDS is defined to a non zero value.
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+Changes between FreeRTOS V10.4.2 and FreeRTOS V10.4.3 released December 14 2020
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+
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+ V10.4.3 is included in the 202012.00 LTS release. Learn more at https:/freertos.org/lts-libraries.html
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+
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+ See https://www.FreeRTOS.org/FreeRTOS-V10.4.x.html
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+
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+ + Changes to improve robustness and consistency for buffer allocation in
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+ the heap, queue and stream buffer.
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+ + The following functions can no longer be called from unprivileged code.
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+ - xTaskCreateRestricted
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+ - xTaskCreateRestrictedStatic
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+ - vTaskAllocateMPURegions
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+
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+
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+Changes between FreeRTOS V10.4.1 and FreeRTOS V10.4.2 released November 10 2020
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+
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+ See https://www.FreeRTOS.org/FreeRTOS-V10.4.x.html
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+
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+ + Fix an issue in the ARMv8-M ports that caused BASEPRI to be masked
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+ between the first task starting to execute and that task making
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+ a FreeRTOS API call.
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+ + Introduced xTaskDelayUntil(), which is functionally equivalent to
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+ vTaskDelayUntil(), with the addition of returning a value to
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+ indicating whether or not the function placed the calling task into
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+ the Blocked state or not.
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+ + Update WolfSSL to 4.5.0 and add the FIPS ready demo.
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+ + Add support for ESP IDF 4.2 to ThirdParty Xtensa port.
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+ + Re-introduce uxTopUsedPriority to support OpenOCD debugging.
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+ + Convert most dependent libraries in FreeRTOS/FreeRTOS to submodules.
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+ + Various general maintenance and improvements to MISRA compliance.
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+
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+
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+Changes between FreeRTOS V10.4.0 and FreeRTOS V10.4.1 released September 17 2020
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+
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+ See https://www.FreeRTOS.org/FreeRTOS-V10.4.x.html
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+
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+ + Fixed an incorrectly named parameter that prevented the
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+ ulTaskNotifyTakeIndexed macro compiling, and the name space clash in the
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+ test code that prevented this error causing test failures.
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+
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+
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+Changes between FreeRTOS V10.3.1 and FreeRTOS V10.4.0 released September 10 2020
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+
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+ See https://www.FreeRTOS.org/FreeRTOS-V10.4.x.html
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+
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+ Major enhancements:
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+
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+ + Task notifications: Prior to FreeRTOS V10.4.0 each created task had a
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+ single direct to task notification. From FreeRTOS V10.4.0 each task has
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+ an array of notifications. The direct to task notification API has been
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+ extended with API functions postfixed with "Indexed" to enable the API to
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+ operate on a task notification at any array index. See
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+ https://www.freertos.org/RTOS-task-notifications.html for more information.
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+ + Kernel ports that support memory protection units (MPUs): The ARMv7-M and
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+ ARMv8-M MPU ports now support a privilege access only heap. The ARMv7-M
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+ MPU ports now support devices that have 16 MPU regions, have the ability
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+ to override default memory attributes for privileged code and data
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+ regions, and have the ability to place the FreeRTOS kernel code outside of
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+ the Flash memory. The ARMv8-M MPU ports now support tickless idle mode.
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+ See https://www.freertos.org/FreeRTOS-MPU-memory-protection-unit.html
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+ for more information.
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+
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+ Additional noteworthy updates:
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+
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+ + Code formatting is now automated to facilitate the increase in
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+ collaborative development in Git. The auto-formated code is not identical
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+ to the original formatting conventions. Most notably spaces are now used
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+ in place of tabs.
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+ + The prototypes for callback functions (those that start with "Application",
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+ such as vApplicationStackOverflowHook()) are now in the FreeRTOS header
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+ files, removing the need for application writers to add prototypes into
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+ the C files in which they define the functions.
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+ + New Renesas RXv3 port layer.
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+ + Updates to the Synopsys ARC code, including support for EM and HS cores,
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+ and updated BSP.
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+ + Added new POSIX port layer that allows FreeRTOS to run on Linux hosts in
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+ the same way the Windows port layer enables FreeRTOS to run on Windows
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+ hosts.
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+ + Many other minor optimisations and enhancements. For full details
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+ see https://github.com/FreeRTOS/FreeRTOS-Kernel/commits/master
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+
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+
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+Changes between FreeRTOS V10.3.0 and FreeRTOS V10.3.1 released February 18 2020
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+
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+ See https://www.FreeRTOS.org/FreeRTOS-V10.3.x.html
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+
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+ + ./FreeRTOS-Labs directory was removed from this file. The libraries it
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+ contained are now available as a separate download.
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+
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+Changes between FreeRTOS V10.2.1 and FreeRTOS V10.3.0 released February 7 2020
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+
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+ See https://www.FreeRTOS.org/FreeRTOS-V10.3.x.html
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+
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+ New and updated kernel ports:
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+
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+ + Added RISC-V port for the IAR compiler.
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+ + Update the Windows simulator port to use a synchronous object to prevent
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+ a user reported error whereby a task continues to run for a short time
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+ after being moved to the Blocked state. Note we were not able to
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+ replicate the reported issue and it likely depends on your CPU model.
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+ + Correct alignment of stack top in RISC-V port when
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+ configISR_STACK_SIZE_WORDS is defined to a non zero value, which causes
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+ the interrupt stack to be statically allocated.
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+ + The RISC-V machine timer compare register can now be for any HART, whereas
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+ previously it was always assumed FreeRTOS was running on HART 0.
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+ + Update the sequence used to update the 64-bit machine timer
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+ compare register on 32-bit cores to match that suggested in RISC-V
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+ documentation.
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+ + Added tickless low power modes into the ARM, IAR and GCC Cortex-M0 compiler
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+ ports.
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+ + Updated the behaviour of the ARMv7-M MPU (Memory Protection Unit) ports to
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+ match that of the ARMv8-M ports whereby privilege escalations can only
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+ originate from within the kernel's own memory segment. Added
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+ configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY configuration constant.
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+ + Update existing MPU ports to correctly disable the MPU before it is
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+ updated.
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+ + Added contributed port and demo application for a T-Head (formally C-SKY)
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+ microcontroller.
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+
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+ New API functions:
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+
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+ + Added the vPortGetHeapStats() API function which returns information on
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+ the heap_4 and heap_5 state.
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+ + Added xTaskCatchUpTicks(), which corrects the tick count value after the
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+ application code has held interrupts disabled for an extended period.
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+ + Added xTaskNotifyValueClear() API function.
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+ + Added uxTimerGetReloadMode() API function.
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+
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+ Other miscellaneous changes:
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+ + Change type of uxPendedTicks from UBaseType_t to TickType_t to ensure it
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+ has the same type as variables with which it is compared to, and therefore
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+ also renamed the variable xPendingTicks.
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+ + Update Keil projects that use the MPU so memory regions come from linker
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+ script (scatter file) variables instead of being hard coded.
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+ + Added LPC51U68 Cortex-M0+ demos for GCC (MCUXpresso), Keil and IAR
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+ compilers.
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+ + Added CORTEX_MPU_STM32L4_Discovery_Keil_STM32Cube demo.
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+ + Added LPC54018 MPU demo.
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+ + Rename xTaskGetIdleRunTimeCounter() to ulTaskGetIdleRunTimeCounter().
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+
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+
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Changes between FreeRTOS V10.2.1 and FreeRTOS V10.2.0 released May 13 2019:
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+ Added ARM Cortex-M23 port layer to complement the pre-existing ARM
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@@ -163,8 +304,8 @@ Changes between FreeRTOS V9.0.1 and FreeRTOS V10.0.0:
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New Features and components:
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- + Stream Buffers - see http://www.FreeRTOS.org/RTOS-stream-buffer-example.html
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- + Message Buffers - see http://www.FreeRTOS.org//RTOS-message-buffer-example.html
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+ + Stream Buffers - see https://www.FreeRTOS.org/RTOS-stream-buffer-example.html
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+ + Message Buffers - see https://www.FreeRTOS.org//RTOS-message-buffer-example.html
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+ Move FreeRTOS+TCP into the main repository, along with the basic Win32
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TCP demo FreeRTOS_Plus_TCP_Minimal_Windows_Simulator.
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@@ -266,7 +407,7 @@ Changes since FreeRTOS V9.0.0:
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Changes between FreeRTOS V9.0.0 and FreeRTOS V9.0.0rc2 released May 25 2016:
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- See http://www.FreeRTOS.org/FreeRTOS-V9.html
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+ See https://www.FreeRTOS.org/FreeRTOS-V9.html
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RTOS kernel updates:
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@@ -275,7 +416,7 @@ Changes between FreeRTOS V9.0.0 and FreeRTOS V9.0.0rc2 released May 25 2016:
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"CreateStatic()" API functions. The stack size parameter in
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xTaskCreateStatic() is now uint32_t, which changes the prototype of the
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callback functions. See the following URL:
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- http://www.freertos.org/xTaskCreateStatic.html
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+ https://www.FreeRTOS.org/xTaskCreateStatic.html
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+ GCC ARM Cortex-A port: Introduced the configUSE_TASK_FPU_SUPPORT
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constant. When configUSE_TASK_FPU_SUPPORT is set to 2 every task is
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automatically given a floating point (FPU) context.
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@@ -324,7 +465,7 @@ Changes between FreeRTOS V9.0.0 and FreeRTOS V9.0.0rc2 released May 25 2016:
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Changes between FreeRTOS V9.0.0rc1 and FreeRTOS V9.0.0rc2 (release candidate 2)
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released March 30 2016:
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- NOTE - See http://www.FreeRTOS.org/FreeRTOS-V9.html for details
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+ NOTE - See https://www.FreeRTOS.org/FreeRTOS-V9.html for details
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+ The functions that create RTOS objects using static memory allocation have
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been simplified and will not revert to using dynamic allocation if a
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@@ -515,6 +656,8 @@ Changes between V8.2.0 and V8.2.1 released 24th March 2015.
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Windows port.
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+ Update the PIC32 port to remove deprecation warnings output by the latest
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XC32 compilers.
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+ + Fix bug when xQueueOverwrite() and xQueueOverwrite() from ISR are used to
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+ overwrite items in two queues that are part of the same set.
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Demo application updates:
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@@ -535,7 +678,7 @@ Changes between V8.1.2 and V8.2.0 released 16th January 2015
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Significant RTOS kernel updates:
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+ MAJOR NEW FEATURE! Task notifications. Please see the following URL for
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- details: http://www.FreeRTOS.org/RTOS-task-notifications.html
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+ details: https://www.FreeRTOS.org/RTOS-task-notifications.html
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+ NEW HEADER FILE REQUIRED! Obsolete definitions have been separated into
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a new header file called FreeRTOS/Source/include/deprecated_definitions.h.
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This header file must be present to build. Note some of the obsolete
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@@ -699,21 +842,21 @@ Changes between V8.0.0 and V8.0.1 released 2nd May 2014
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Changes between V7.6.0 and V8.0.0 released 19th Feb 2014
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- http://www.freertos.org/upgrading-to-FreeRTOS-V8.html
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+ https://www.FreeRTOS.org/upgrading-to-FreeRTOS-V8.html
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FreeRTOS V8.x.x is a drop-in compatible replacement for FreeRTOS V7.x.x,
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although a change to the type used to reference character strings may result
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in application code generating a few (easily clearable) compiler warnings
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after the upgrade, and an updated typedef naming convention means use of the
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old typedef names is now discouraged.
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- See http://www.freertos.org/upgrading-to-FreeRTOS-V8.html for full
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+ See https://www.FreeRTOS.org/upgrading-to-FreeRTOS-V8.html for full
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information.
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New features and functionality:
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- + Event groups - see http://www.freertos.org/FreeRTOS-Event-Groups.html
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+ + Event groups - see https://www.FreeRTOS.org/FreeRTOS-Event-Groups.html
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+ Centralised deferred interrupt processing - see
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- http://www.freertos.org/xTimerPendFunctionCallFromISR.html
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+ https://www.FreeRTOS.org/xTimerPendFunctionCallFromISR.html
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Other updates:
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@@ -724,7 +867,7 @@ Changes between V7.6.0 and V8.0.0 released 19th Feb 2014
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priority of the Running task.
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+ New low power tickless demonstration project that targets the ST STM32L
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microcontroller - see
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- http://www.freertos.org/STM32L-discovery-low-power-tickless-RTOS-demo.html
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+ https://www.FreeRTOS.org/STM32L-discovery-low-power-tickless-RTOS-demo.html
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+ Add xPortGetMinimumEverFreeHeapSize() to heap_4.c.
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+ Small change to the tickless low power implementation on the SAM4L to
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ensure the alarm value (compare match value) cannot be set to zero when a
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@@ -874,8 +1017,8 @@ Changes between V7.4.2 and V7.5.0 released July 19 2013
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New API functions:
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- + uxTaskGetSystemState() http://www.freertos.org/uxTaskGetSystemState.html
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- + xQueueOverwrite() http://www.freertos.org/xQueueOverwrite.html
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+ + uxTaskGetSystemState() https://www.FreeRTOS.org/uxTaskGetSystemState.html
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+ + xQueueOverwrite() https://www.FreeRTOS.org/xQueueOverwrite.html
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+ xQueueOverwriteFromISR()
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+ xQueuePeekFromISR()
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@@ -888,7 +1031,7 @@ Changes between V7.4.2 and V7.5.0 released July 19 2013
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+ Microsemi SmartFusion2
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New FreeRTOSConfig.h settings
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- http://shop.freertos.org/FreeRTOS_API_and_Configuration_Reference_s/1822.htm
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+ https://freertos.org/a00110.html
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+ configUSE_TIME_SLICING
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+ configUSE_NEWLIB_REENTRANT
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@@ -925,7 +1068,7 @@ Changes between V7.4.1 and V7.4.2 released May 1 2013
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+ Added FreeRTOS+FAT SL source code and demo project. The demo project
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runs in the FreeRTOS Windows simulator for easy and hardware independent
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- experimentation and evaluation. See http://www.FreeRTOS.org/fat_sl
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+ experimentation and evaluation. See https://www.FreeRTOS.org/fat_sl
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Changes between V7.4.0 and V7.4.1 released April 18 2013
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@@ -954,7 +1097,7 @@ Changes between V7.4.0 and V7.4.1 released April 18 2013
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Changes between V7.3.0 and V7.4.0 released February 20 2013
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+ New feature: Queue sets. See:
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- http://www.FreeRTOS.org/Pend-on-multiple-rtos-objects.html
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+ https://www.FreeRTOS.org/Pend-on-multiple-rtos-objects.html
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+ Overhauled the default tickless idle mode implementation provided with the
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ARM Cortex-M3 port layers.
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+ Enhanced tickless support in the core kernel code with the introduction of
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@@ -1101,7 +1244,7 @@ Changes between V7.1.0 and V7.1.1 released May 1 2012
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+ Introduced the portSETUP_TCB() macro to remove the requirement for the
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Windows simulator to use the traceTASK_CREATE() macro, leaving the trace
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- macro available for use by FreeRTOS+Trace (http://www.FreeRTOS.org/trace).
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+ macro available for use by FreeRTOS+Trace (https://www.FreeRTOS.org/trace).
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+ Added a new trace macro, traceMOVE_TASK_TO_READY_STATE(), to allow future
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FreeRTOS+Trace versions to provide even more information to users.
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+ Updated the FreeRTOS MPU port to be correct for changes that were
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@@ -1129,7 +1272,7 @@ Changes between V7.1.0 and V7.1.1 released May 1 2012
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+ The command interpreter has now been formally released as FreeRTOS+CLI,
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and been moved out of the main FreeRTOS download, to instead be available
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- from the FreeRTOS+ Ecosystem site http://www.FreeRTOS.org/plus.
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+ from the FreeRTOS+ Ecosystem site https://www.FreeRTOS.org/plus.
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+ flash_timer.c/h has been added to the list of standard demo tasks. This
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performs the same functionality as the flash.c tasks, but using software
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timers in place of tasks.
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@@ -1411,7 +1554,7 @@ Changes between V6.0.3 and V6.0.4 released March 14 2010
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+ All the contributed files that were located in the Demo/Unsupported_Demos
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directory have been removed. These files are instead now available in the
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new Community Contributions section of the FreeRTOS website. See
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- http://www.freertos.org/RTOS-contributed-ports.html
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+ https://www.FreeRTOS.org/RTOS-contributed-ports.html
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+ The project file located in the Demo/CORTEX_STM32F107_GCC_Rowley directory
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has been upgraded to use V2.x of the Rowley Crossworks STM32 support
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package.
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@@ -1704,9 +1847,6 @@ Changes between V4.8.0 and V5.0.0 released April 15, 2008
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compiler might not issue any type mismatch warnings!
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- See http://www.FreeRTOS.org/upgrading.html for full information.
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-
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-
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Other changes:
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+ Support added for the new Luminary Micro LM3S3768 and LM3S3748 Cortex-M3
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@@ -1960,7 +2100,7 @@ Changes between V4.0.1 and V4.0.2 released May 28, 2006
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it was also called when the tick function was called during the scheduler
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unlocking process.
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+ The EMAC driver in the SAM7X lwIP demo has been made more robust as per
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- the thread: http://sourceforge.net/forum/message.php?msg_id=3714405
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+ the thread: https://sourceforge.net/forum/message.php?msg_id=3714405
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+ In the PC ports: Add function prvSetTickFrequencyDefault() to set the
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DOS tick back to its proper value when the scheduler exits. Thanks
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Raynald!
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Zim Kalinowski