RAM Power Down¶
The RAM Power Down library is a basic module for disabling unused sections of RAM, which allows to save power in low power applications.
To disable unused RAM sections, call power_down_unused_ram().
This function will automatically disable all memory regions that are not used by the application.
Note
power_down_unused_ram() powers down memory regions that are outside of the _image_ram_end boundary.
Accessing RAM that is powered down results in a bus fault exception.
Working with an indirectly accessed memory that is not associated with any variable or a memory segment does not cause the _image_ram_end symbol to increase its value.
For this reason, do not access powered down RAM sections when using this power optimization method.
API documentation¶
include/ram_pwrdn.hlib/ram_pwrdn/-
group
ram_pwrdn Module for disabling unused sections of RAM.
Functions
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void
power_down_unused_ram(void)¶ Request powering down unused RAM sections.
Not all devices support this feature.
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void