I have a task that I want to block until some data arrive from a serial port. I have setup the serial port to trigger an interrupt every time a byte is received. I want to notify a task to unblock and process the data. I tried with ulTaskNotifyTake and vTaskNotifyGiveFromISR but the program seems…

Some good resources for that - RTOS for ARM Cortex-M Understanding priority levels of ISR and FreeRTOS APIs - #16 by aggarg

My 1st guess configMINIMAL_STACK_SIZE is way too small (for a task using stack hungry printf-family functions). 2nd issue might be an incorrect interrupt priority. Edit: You also should check the return codes of xTaskCreate etc.

[image] TheBeginning: void my_task(void) { enable_serial_port(); while(true) { my_task_handle = xTaskGetCurrentTaskHandle(); thread_notification = ulTaskNotifyTake(pdTRUE, portMAX_DELAY); print("my_task running\r\n"); } } void ISR(void) { BaseType_t xHigherPriorityTaskWoken =…

Your second guess is correct. There’s something wrong with portASSERT_IF_INTERRUPT_PRIORITY_INVALID() because it fails…

Thanks, I already started looking at them.

Thank you for your help! It worked

Wakeup a task from ISR

Kernel

aggarg (Gaurav Aggarwal) June 30, 2022, 9:10am 5

Some good resources for that -

RTOS for ARM Cortex-M
Understanding priority levels of ISR and FreeRTOS APIs - #16 by aggarg

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Wakeup a task from ISR

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