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