Problem with FreeRTOS in one core with rp2350

[pedrorovi]

Hi,
I want to use FreeRTOS but just in the first core, as I am using the W5500 module.
When both cores are enabled in the FreeRTOSConfig, the program crashes.
If I define just one core, this happens.

/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/../lib/FreeRTOS-Kernel/include/FreeRTOS.h:2880:6: error: #error configUSE_TASK_PREEMPTION_DISABLE is not supported in single core FreeRTOS
 2880 |     #error configUSE_TASK_PREEMPTION_DISABLE is not supported in single core FreeRTOS
      |      ^~~~~
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/../lib/FreeRTOS-Kernel/include/FreeRTOS.h:2884:6: error: #error configUSE_CORE_AFFINITY is not supported in single core FreeRTOS
 2884 |     #error configUSE_CORE_AFFINITY is not supported in single core FreeRTOS

When I disabled these options too, the problem moves to variant hooks:

/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp: In function 'void IdleThisCore(void*)':
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp:176:9: error: 'vTaskPreemptionDisable' was not declared in this scope; did you mean 'traceENTER_vTaskPreemptionDisable'?
  176 |         vTaskPreemptionDisable(nullptr);
      |         ^~~~~~~~~~~~~~~~~~~~~~
      |         traceENTER_vTaskPreemptionDisable
Compiling .pio/build/rpipico2/FrameworkArduino/RP2040USB.cpp.o
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp:183:9: error: 'vTaskPreemptionEnable' was not declared in this scope; did you mean 'traceENTER_vTaskPreemptionEnable'?
  183 |         vTaskPreemptionEnable(nullptr);
      |         ^~~~~~~~~~~~~~~~~~~~~
      |         traceENTER_vTaskPreemptionEnable
Indexing .pio/build/rpipico2/lib45f/libWiFi.a
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp: In function 'void __freertos_idle_other_core()':
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp:188:5: error: 'vTaskPreemptionDisable' was not declared in this scope; did you mean 'traceENTER_vTaskPreemptionDisable'?
  188 |     vTaskPreemptionDisable(nullptr);
      |     ^~~~~~~~~~~~~~~~~~~~~~
      |     traceENTER_vTaskPreemptionDisable
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp: In function 'void __freertos_resume_other_core()':
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp:201:5: error: 'vTaskPreemptionEnable' was not declared in this scope; did you mean 'traceENTER_vTaskPreemptionEnable'?
  201 |     vTaskPreemptionEnable(nullptr);
      |     ^~~~~~~~~~~~~~~~~~~~~
      |     traceENTER_vTaskPreemptionEnable
Compiling .pio/build/rpipico2/FrameworkArduino/SerialPIO.cpp.o
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp: In function 'void startFreeRTOS()':
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp:213:5: error: 'vTaskCoreAffinitySet' was not declared in this scope
  213 |     vTaskCoreAffinitySet(c0, 1 << 0);
      |     ^~~~~~~~~~~~~~~~~~~~
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp: In function 'void __USBStart()':
/home/pedro/.platformio/packages/framework-arduinopico/libraries/FreeRTOS/src/variantHooks.cpp:519:5: error: 'vTaskCoreAffinitySet' was not declared in this scope
  519 |     vTaskCoreAffinitySet(__usbTask, 1 << 0);

Thanks for the help.

[earlephilhower]

This core requires the dual core setting in the shipped configuration. There is plumbing needed to keep both cores running when things like flash writes happen.

You can set the core affinity for your own tasks using the normal API if you want to segregate things(or just use setup/loop and setup1/loop1).

Why would the W5500 need you to go to a half brained core config?

[pedrorovi]

Hi Earl,
I read it here. arduino-pico-eth

"
The same restrictions for WiFi apply to these Ethernet classes, namely:

Only core 0 may run any networking related code.

In FreeRTOS, only the setup and loop task can call networking libraries, not any tasks.

"

[earlephilhower]

Yes, so use setup/loop or use the task affinity settings if you spawn your own threads.