Sleep mode with FreeRTOS

RE: Sleep mode with FreeRTOS

Chongchun Moon — Thu, 09 May 2019 18:42:01 GMT

Hello,

I found one way to resolve this issue. After adding FPU IRQ handler(Link), It looks that sleep current and BLE connection is okay.

Thanks for supporting.

RE: Sleep mode with FreeRTOS

Chongchun Moon — Thu, 09 May 2019 14:13:16 GMT

Hello,

Thank you for respond.

How do I increase the size of the task sizes? or

Do you mean increase size of stack size when task is created?

If so, I tried to increase stack size of task as below, but it looks like situation is same.

 BaseType_t xReturned = xTaskCreate(softdevice_task,
                                       "BLE",
                                       NRF_BLE_FREERTOS_SDH_TASK_STACK+400,
                                       p_context,
                                       2,
                                       &m_softdevice_task);

By the way, Is the way I modified code in port_cmsis_systick.c okay to handle unwanted FPU interrupt when device goes to sleep?

Thanks,

Chongchun Moon

RE: Sleep mode with FreeRTOS

Susheel Nuguru — Thu, 09 May 2019 10:48:34 GMT

Seems like the task TCB is corrupted. this could happen if the task restore from the scheduler happened with a corrupted stack data. Can you increase the sizes of the task sizes (when task is created) to see if that helps? For some reason FPU interrupt that you are not handling in the application, could be triggered too many times pre-empting the BLE task and causing stack overflow.

Just a theory, but worth a shot to try.