16 Questions
What is the range of the returned count when a counting semaphore is fully taken?
0 to uxMaxCount
What is the purpose of the 'notification' mechanism in FreeRTOS?
Alternative to binary semaphores with lower memory usage
How does a counting semaphore signal availability?
Returned count greater than 0
How does FreeRTOS handle context switch in ISR?
Context switch only when notification value changes
What happens if xSemaphoreTake returns pdTRUE?
Semaphore is taken and needs to be released
What does the private 32-bit 'notification value' do in FreeRTOS tasks?
Used for blocking and unblocking tasks
What is the purpose of the function uxTaskPriorityGet in FreeRTOS?
Obtains the current priority of a task
In FreeRTOS, what happens if NULL is passed as the parameter in vTaskPrioritySet?
Changes the priority of the calling task
Which function in FreeRTOS is used to change the priority of a task?
vTaskPrioritySet
What does xQueueCreate do in FreeRTOS?
Creates a queue for storing items in FIFO order
When handling an ISR context switch in FreeRTOS, what is the significance of Critical Sections?
Guarantees thread safety
What is the consequence of passing an invalid handle to vTaskPrioritySet in FreeRTOS?
Results in undefined behavior
In FreeRTOS, what is a weakness related to an undefined pointer value while setting a task's priority?
No simple test to avoid this issue
Which function in FreeRTOS changes the priority of a task to a specified value?
'vTaskPrioritySet'
'vTaskPrioritySet' should not be called with NULL as its first parameter unless:
'uxNewPriority' is set to current priority
'uxTaskPriorityGet' returns undefined for any argument except when:
'pxTask' is NULL
Test your knowledge of embedded systems programming with this quiz covering topics such as error handling, input methods, and task management functions. The quiz includes questions related to xil_printf, getchar, and xTaskGetTickCount.
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