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debbd254b6
* RP2040: malloc needs to be thread safe for FreeRTOS whether both cores are used or not * RP2040: CMake file had broken left over test code * RP2040: portIS_FREE_RTOS_CORE() returned an incorrect value prior to scheduler init when the application was compiled without multicore support * RP2040: Bad initialization code was causing IRQs to get disabled before main() was called when using non static allocation |
3 years ago | |
|---|---|---|
| .. | ||
| include | 3 years ago | |
| .gitignore | 4 years ago | |
| CMakeLists.txt | 4 years ago | |
| FreeRTOS_Kernel_import.cmake | 3 years ago | |
| LICENSE.md | 4 years ago | |
| README.md | 4 years ago | |
| idle_task_static_memory.c | 4 years ago | |
| library.cmake | 4 years ago | |
| pico_sdk_import.cmake | 4 years ago | |
| port.c | 3 years ago | |
README.md
Overview
This directory provides a FreeRTOS-Kernel port that can be used with the Raspberry Pi Pico SDK. It supports:
- Simple CMake INTERFACE libraries, to provide the FreeRTOS-Kernel and also the individual allocator types, without copying code into the user's project.
- Running the FreeRTOS-Kernel and tasks on either core 0 or core 1
- Use of SDK synchronization primitives (such as mutexes, semaphores, queues from pico_sync) between FreeRTOS tasks and code executing on the other core, or in IRQ handlers.
Note that a FreeRTOS SMP version of this port is also available in the FreeRTOS-Kernel smp branch, which additionally supports utilizing both RP2040 CPU cores for FreeRTOS tasks simultaneously.
Using this port
Copy FreeRTOS-Kernel-import.cmake into your project, and add:
import(FreeRTOS_Kernel_import.cmake)
below the usual import of pico_sdk_import.cmake
This will find the FreeRTOS kernel if it is a direct sub-module of your project, or if you provide the FREERTOS_KERNEL_PATH variable in your environment or via -DFREERTOS_KERNEL_PATH=/path/to/FreeRTOS-Kernel on the CMake command line.
Advanced Configuration
Some additional config options are defined here which control some low level implementation details.
Known Limitations
- Tickless idle has not currently been tested, and is likely non-functional