Mastering STM32 - Second Edition by Carmine Noviello

Author:Carmine Noviello [Carmine Noviello]
Language: eng
Format: epub
Publisher: leanpub.com
Published: 2022-02-13T00:00:00+00:00

This apparently innocent code has a dramatic impact on the power consumption of our device. Even if we do not have too much to do during those 500ms, we waste a lot of power checking the value of the global SysTick tick count to see if that time has been elapsed. Instead, we can rearrange that code to stay in sleep mode for most of the time, and we can set up a timer that wakes up the MCU after 100ms.

Letting other software components decide when to place the MCU in sleep mode could represent another approach. As we will discover in Chapter 23, a Real-Time Operating System may be programmed to automatically put the MCU in sleep mode when there is nothing to do5.

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