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#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
menuconfig TIMER
bool "Timer Support"
default n
---help---
This selection enables building of the "upper-half" timer
driver. See include/nuttx/timer.h for further timer driver
information.
menuconfig RTC
bool "RTC Driver Support"
default n
---help---
This selection enables configuration of a real time clock (RTCdriver.
See include/nuttx/rtc.h for further RTC driver information.
Most RTC drivers are MCU specific and may require other specific
settings.
if RTC
config RTC_DATETIME
bool "Date/Time RTC Support"
default n
---help---
There are two general types of RTC: (1) A simple battery backed
counter that keeps the time when power is down, and (2) a full
date / time RTC the provides the date and time information, often in
BCD format. If RTC_DATETIME is selected, it specifies this second kind
of RTC. In this case, the RTC is used to "seed" the normal NuttX timer
and the NuttX system timer provides for higher resolution time.
if !RTC_DATETIME
config RTC_HIRES
bool "Hi-Res RTC Support"
default n
---help---
If RTC_DATETIME not selected, then the simple, battery backed counter
is used. There are two different implementations of such simple
counters based on the time resolution of the counter: The typical RTC
keeps time to resolution of 1 second, usually supporting a 32-bit
time_t value. In this case, the RTC is used to "seed" the normal NuttX
timer and the NuttX timer provides for higherresoution time.
If RTC_HIRES is enabled in the NuttX configuration, then the RTC
provides higher resolution time and completely replaces the system
timer for purpose of date and time.
config RTC_FREQUENCY
int "Hi-Res RTC frequency"
default 1
depends on RTC_HIRES
---help---
If RTC_HIRES is defined, then the frequency of the high resolution RTC
must be provided. If RTC_HIRES is not defined, RTC_FREQUENCY is
assumed to be one Hz.
endif # !RTC_DATETIME
config RTC_DRIVER
bool "RTC Driver Support"
default n
---help---
This selection enables building of the "upper-half" RTC
driver. See include/nuttx/rtc.h for further RTC driver
information.
if RTC_DRIVER
config RTC_ALARM
bool "RTC Alarm Support"
default n
---help---
Enable if the RTC hardware supports setting of an alarm. A callback
function will be executed when the alarm goes off.
config RTC_PERIODIC
bool "RTC Periodic Interrupts"
default n
depends on EXPERIMENTAL
---help---
Add interrupt controls for RTCs that support periodic interrupts.
config RTC_ONESEC
bool "RTC Once-per-second interrupts"
default n
depends on EXPERIMENTAL
---help---
Add interrupt controls for RTCs that support once-per-second interrupts.
config RTC_EPOCHYEAR
bool "RTC epoch year"
default n
depends on EXPERIMENTAL
---help---
Add controls for RTCs that support epoch year settings.
Many RTCs encode the year in an 8-bit register which is either interpreted
as an 8-bit binary number or as a BCD number. In both cases, the number is
interpreted relative to this RTC's Epoch. The RTC's Epoch is initialized to
1900 on most systems but on Alpha and MIPS it might also be initialized to
1952, 1980, or 2000, depending on the value of an RTC register for the year.
With some RTCs, these operations can be used to read or to set the RTC's
Epoch, respectively.
config RTC_IOCTL
bool "RTC IOCTLs"
default n
---help---
Support the RTC interface ioctl() method. This allows you to add
architecture-specific RTC operations to the RTC interface
endif # RTC_DRIVER
endif # RTC
menuconfig WATCHDOG
bool "Watchdog Timer Support"
default n
---help---
This selection enables building of the "upper-half" watchdog timer
driver. See include/nuttx/watchdog.h for further watchdog timer driver
information.
if WATCHDOG
config WATCHDOG_DEVPATH
string "Watchdog Device Path"
default "/dev/watchdog0"
endif # WATCHDOG
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