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The following code snippet is from the entry function of a task. There are other tasks whose priorities are unknown. What best describes the value of suspended_time at the end of this code snippet?tick1 =  osKernelGetTickCount();osDelay(1000);tick2 = osKernelGetTickCount();suspended_time = tick2 - tick1;*= 1000 + computation time of this task>= 1000= 1000<= 1000

Question

The following code snippet is from the entry function of a task. There are other tasks whose priorities are unknown. What best describes the value of suspended_time at the end of this code snippet?tick1 =  osKernelGetTickCount();osDelay(1000);tick2 = osKernelGetTickCount();suspended_time = tick2 - tick1;*= 1000 + computation time of this task>= 1000= 1000<= 1000

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Solution

The value of suspended_time at the end of this code snippet would be >= 1000.

Here's the step-by-step explanation:

  1. tick1 = osKernelGetTickCount(); This line gets the current tick count of the operating system's kernel and assigns it to tick1. The tick count is a measure of time, with each tick typically representing one millisecond.

  2. osDelay(1000); This line causes the task to wait for 1000 ticks (or milliseconds). During this time, the task is not running.

  3. tick2 = osKernelGetTickCount(); This line gets the current tick count again, after the delay, and assigns it to tick2.

  4. suspended_time = tick2 - tick1; This line calculates the difference between the two tick counts, which represents the total time that has passed during the delay and assigns it to suspended_time.

Since the task was delayed for 1000 ticks, and then some amount of time passed to execute the lines of code, the total time (suspended_time) is at least 1000. If other tasks with higher priorities were running during this time, they could have caused additional delay, making suspended_time even larger. Therefore, suspended_time is >= 1000.

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