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The CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP option is enabled by default for the following examples: - system/deep_sleep, - system/ulp, - system/ulp_adc.
12 lines
842 B
Markdown
12 lines
842 B
Markdown
# Example: deep sleep
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This example illustrates usage of deep sleep mode and various wakeup sources.
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The following wake up sources are configured:
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- Timer: wake up the chip in 20 seconds
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- EXT1: wake up the chip if any of the two buttons are pressed (GPIO25, GPIO26)
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- Touch: wake up the chip if any of the touch pads are pressed (GPIO32, GPIO33)
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- ULP: wake up when the chip temperature changes by more than ~5 degrees Celsius (this value hasn't been characterized exactly yet).
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In this example, the `CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP` Kconfig option is used, which allows you to reduce the boot time of the bootloader during waking up from deep sleep. The bootloader stores in rtc memory the address of a running partition and uses it when it wakes up. This example allows you to skip all image checks and speed up the boot. |