nuttx/drivers/timers/Kconfig

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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
menu "Timer Driver Support"
menuconfig TIMER
bool "Timer Support"
default n
---help---
This selection enables building of the "upper-half" timer
driver. See include/nuttx/timers/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/timers/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_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_DRIVER
bool "RTC Driver Support"
default n
---help---
This selection enables building of the "upper-half" RTC
driver. See include/nuttx/timers/rtc.h for further RTC driver
information.
if RTC_DRIVER
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
config RTC_EXTERNAL
bool "External RTC Support"
default n
---help---
In modern MCUs, the RTC is usually implement as an internal
peripheral to the MCU. An option is to use an external RTC
connected to the MCU typically via SPI or I2C.
If an external RTC is connect to the MCU through some bus, then the
RTC will not be available to the system until after the system
fully boots up and is able to access the bus. In that case, this
setting must be included to suppress attempts to initialize the RTC
early in the boot sequence.
config RTC_DSXXXX
bool "DS130x/DS323x RTC Driver"
default n
select I2C
select I2C_TRANSFER
select RTC_EXTERNAL
select RTC_DATETIME
---help---
Enables support for the Maxim Integrated DS3231 I2C RTC timer.
if RTC_DSXXXX
choice
prompt "Maxim Integrated RTC"
default RTC_DS3231
config RTC_DS1302
bool "DS1302"
---help---
Enables support for the Maxim Integrated DS1307 serial RTC timer.
config RTC_DS1307
bool "DS1307"
---help---
Enables support for the Maxim Integrated DS1307 I2C RTC timer.
config RTC_DS3231
bool "DS3231"
---help---
Enables support for the Maxim Integrated DS3231 I2C RTC timer.
config RTC_DS3232
bool "DS3232"
---help---
Enables support for the Maxim Integrated DS3232 I2C RTC timer.
config RTC_DS3234
bool "DS3234"
depends on EXPERIMENTAL
---help---
Enables support for the Maxim Integrated DS3234 SPI RTC timer.
Not yet implemented.
endchoice # Maxim Integrated RTC
config DS3231_I2C_FREQUENCY
int "DS1307/DS323x I2C frequency"
default 400000
range 1 400000
endif # RTC_DSXXXX
config RTC_PCF85263
bool "PCF85263 RTC Driver"
default n
select I2C
select I2C_TRANSFER
select RTC_EXTERNAL
select RTC_DATETIME
---help---
Enables support for the Maxim Integrated DS3231 I2C RTC timer.
if RTC_PCF85263
config PCF85263_I2C_FREQUENCY
int "PCF85263 I2C frequency"
default 400000
range 1 400000
endif # RTC_PCF85263
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/timers/watchdog.h for further watchdog timer driver
information.
if WATCHDOG
config WATCHDOG_DEVPATH
string "Watchdog Device Path"
default "/dev/watchdog0"
endif # WATCHDOG
config TIMERS_CS2100CP
bool "CS2100-CP Fraction-N Clock Multiplier"
depends on I2C
select I2C_TRANSFER
if TIMERS_CS2100CP
config CS2100CP_DEBUG
bool "Enable CS2100-CP Debug Features"
depends on DEBUG
config CS2100CP_REGDEBUG
bool "Enable CS2100-CP Register Debug"
depends on DEBUG
endif # TIMERS_CS2100CP
endmenu # Timer Driver Support