26 lines
1.1 KiB
ReStructuredText
26 lines
1.1 KiB
ReStructuredText
RTC Drivers
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===========
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NuttX supports a low-level, two-part RealTime Clock (RTC) driver.
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#. An "upper half", generic driver that provides the common RTC
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interface to application level code, and
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#. A "lower half", platform-specific driver that implements the
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low-level timer controls to implement the RTC functionality.
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Files supporting the RTC driver can be found in the following
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locations:
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- **Interface Definition**. The header file for the NuttX RTC
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driver reside at ``include/nuttx/timers/rtc.h``. This header
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file includes both the application level interface to the RTC
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driver as well as the interface between the "upper half" and
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"lower half" drivers. The RTC driver uses a standard character
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driver framework.
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- **"Upper Half" Driver**. The generic, "upper half" RTC driver
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resides at ``drivers/timers/rtc.c``.
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- **"Lower Half" Drivers**. Platform-specific RTC drivers reside
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in ``arch/``\ *<architecture>*\ ``/src/``\ *<hardware>*
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directory for the specific processor *<architecture>* and for
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the specific *<chip>* RTC peripheral devices.
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