FreeRTOS for Infineon MCUs

August 31, 2026 · View on GitHub

Refer to the README.md for a complete description.

Changelog

v10.6.203

Documentation update
Re-enabled support for XMC1XXX devices.

v10.6.202

Copyright updates
Added workaround to avoid BWC with previous configurations in FreeRTOSConfig.h file

v10.6.201

Minor updates to CM33 FreeRTOSConfig.h template to enhance support Non-TrustZone and TrustZone flows
Documentation enhancements

v10.6.2

Updated to upstream FreeRTOS kernel version 10.6.2
Enabled support for LLVM_ARM toolchain and Updated the FreeRTOSConfig.h template to enable LLVM configuration option required by RTOS support libraries:
```
#define configUSE_PICOLIBC_TLS                  1
```
Enabled support for CM33 TrustZone NSC functionality.

v10.5.004

Updated CM33 GCC_ARM port file to fix build issues with -flto linker option.

v10.5.003

Updated the Cortex®-M33 FreeRTOSConfig.h template to support FreeRTOS on secure devices.
Setting Cortex®-M33 Deep Sleep Latency Configuration to 2 ticks to allow vApplicationSleep function to handle different kind of sleep modes, like simple MCU sleep without tickless.
Added support for D-cache enablement on XMC7200 devices (CM7).

v10.5.002

Added support of DSRAM feature for 20829B0 kit (CM33) on IAR compiler

v10.5.001

Added support for 20829B0 kit (CM33) on IAR compiler

v10.5.0

Updated to upstream FreeRTOS kernel version 10.5.0

v10.4.306

Modified the FreeRTOSConfig.h of CR4 port to fix the issue with debugger
Fixed MISRA warnings
DSRAM support added for CM33 ARM port

v10.4.305

Added functions to save and restore context before sleep for CM33

v10.4.304

Created a common section for frequently called FreeRTOS functions

v10.4.303

Added Cortex®-M7 (CM7) support based on upstream FreeRTOS kernel version 10.4.3 LTS Patch 2

v10.4.302

Updated to upstream FreeRTOS kernel version 10.4.3 LTS Patch 2

v10.4.4

Added Cortex®-R4 (CR4) support based on upstream FreeRTOS kernel version 10.4.3 LTS Patch 1

v10.4.3

Updated to match the upstream FreeRTOS kernel version 10.4.3
Updated to match the upstream FreeRTOS kernel version 10.4.3 LTS Patch 1

v10.3.1

Updated to match the upstream FreeRTOS kernel version 10.3.1
Added ports for Cortex®-M0 and Cortex®-M0+ CPUs.
Added ports for the ARM Compiler 6 (based on GCC port files).

Updated the FreeRTOSConfig.h template to enable configuration options required by RTOS support libraries:

#define configUSE_MUTEXES                       1
#define configUSE_RECURSIVE_MUTEXES             1
#define configUSE_COUNTING_SEMAPHORES           1
#define configSUPPORT_STATIC_ALLOCATION         1
#define configUSE_TRACE_FACILITY                1
#define INCLUDE_xTimerPendFunctionCall          1

Enabled allocation of thread reentrancy structures for each task:
```
#define configUSE_NEWLIB_REENTRANT              1
```

Automatically enable low-power tickless mode based on ModusToolbox™ device configurator selection:

#if defined(CY_CFG_PWR_SYS_IDLE_MODE) && \
   ((CY_CFG_PWR_SYS_IDLE_MODE == CY_CFG_PWR_MODE_SLEEP) || \
   (CY_CFG_PWR_SYS_IDLE_MODE == CY_CFG_PWR_MODE_DEEPSLEEP))
   extern void vApplicationSleep( uint32_t xExpectedIdleTime );
   #define portSUPPRESS_TICKS_AND_SLEEP( xIdleTime ) vApplicationSleep( xIdleTime )
   #define configUSE_TICKLESS_IDLE                 2
   #else
   #define configUSE_TICKLESS_IDLE                 0
   #endif

Automatically configure the deep sleep latency based on ModusToolbox™ device configurator selection:

#if( CY_CFG_PWR_DEEPSLEEP_LATENCY > 0 )
     #define configEXPECTED_IDLE_TIME_BEFORE_SLEEP   CY_CFG_PWR_DEEPSLEEP_LATENCY
     #endif

Added dependency on the CLib FreeRTOS support and RTOS abstraction libraries.