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kenny6666 [7]
2 years ago
13

Assume a 4.094 mhz clock is used as the system clock and the systick selects it as the clock. What should the systick_load regis

ter be in order to generate a systick interrupt every mili second?
Physics
1 answer:
Anarel [89]2 years ago
8 0

The load value for interrupts every one milliseconds is

\begin{aligned}&\mathrm{val}=1 \times 10^{-3} \times 4.094 \times 10^6 \\&\Rightarrow \mathrm{val}=4094\end{aligned}

The load value for interrupts every millisecond is

\begin{aligned}&\mathrm{val}=1 \times 10^{-6} \times 4.094 \times 10^6 \\&\Rightarrow \mathrm{val}=4.094\end{aligned}

However, we can only load integer values, therefore we apply

\Rightarrow v a l \approx 4

When the delay is 1 ms, it is accurate, but when the delay is 1 us, it is a little bit less. We are unable to provide an accurate 1 us delay interrupt because this requires a fractional value was calculated.

<h3>What does a SysTick timer do?</h3>
  • The systick timer has an auto reload and a 24-bit countdown timer.
  • An RTOS scheduler typically uses it to provide a periodic interrupt.
  • The Cortex-M CPU clock is used as the default clock source for the systick timer.

To learn about more tape timer, visit:

brainly.com/question/27798869

#SPJ4

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