253 lines
6.5 KiB
Plaintext
253 lines
6.5 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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menu "Timer Driver Support"
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config TIMER
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bool "Timer Support"
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default n
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---help---
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This selection enables building of the "upper-half" timer
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driver. See include/nuttx/timers/timer.h for further timer driver
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information.
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config ONESHOT
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bool "Oneshot timer driver"
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default n
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---help---
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This selection enables building of the "upper-half" oneshot timer
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driver. See include/nuttx/timers/oneshot.h for further oneshot timer
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driver information.
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menuconfig RTC
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bool "RTC Driver Support"
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default n
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---help---
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This selection enables configuration of a real time clock (RTCdriver.
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See include/nuttx/timers/rtc.h for further RTC driver information.
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Most RTC drivers are MCU specific and may require other specific
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settings.
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if RTC
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config RTC_DATETIME
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bool "Date/Time RTC Support"
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default n
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---help---
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There are two general types of RTC: (1) A simple battery backed
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counter that keeps the time when power is down, and (2) a full
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date / time RTC the provides the date and time information, often in
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BCD format. If RTC_DATETIME is selected, it specifies this second kind
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of RTC. In this case, the RTC is used to "seed" the normal NuttX timer
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and the NuttX system timer provides for higher resolution time.
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if !RTC_DATETIME
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config RTC_HIRES
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bool "Hi-Res RTC Support"
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default n
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---help---
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If RTC_DATETIME not selected, then the simple, battery backed counter
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is used. There are two different implementations of such simple
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counters based on the time resolution of the counter: The typical RTC
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keeps time to resolution of 1 second, usually supporting a 32-bit
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time_t value. In this case, the RTC is used to "seed" the normal NuttX
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timer and the NuttX timer provides for higherresoution time.
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If RTC_HIRES is enabled in the NuttX configuration, then the RTC
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provides higher resolution time and completely replaces the system
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timer for purpose of date and time.
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config RTC_FREQUENCY
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int "Hi-Res RTC frequency"
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default 1
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depends on RTC_HIRES
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---help---
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If RTC_HIRES is defined, then the frequency of the high resolution RTC
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must be provided. If RTC_HIRES is not defined, RTC_FREQUENCY is
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assumed to be one Hz.
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endif # !RTC_DATETIME
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config RTC_ALARM
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bool "RTC Alarm Support"
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default n
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---help---
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Enable if the RTC hardware supports setting of an alarm. A callback
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function will be executed when the alarm goes off.
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config RTC_NALARMS
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int "Number of alarms"
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default 1
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depends on RTC_ALARM
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---help---
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Number of alarms supported by the hardware.
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config RTC_DRIVER
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bool "RTC Driver Support"
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default n
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---help---
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This selection enables building of the "upper-half" RTC
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driver. See include/nuttx/timers/rtc.h for further RTC driver
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information.
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if RTC_DRIVER
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config RTC_PERIODIC
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bool "RTC Periodic Interrupts"
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default n
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depends on EXPERIMENTAL
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---help---
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Add interrupt controls for RTCs that support periodic interrupts.
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config RTC_ONESEC
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bool "RTC Once-per-second interrupts"
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default n
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depends on EXPERIMENTAL
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---help---
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Add interrupt controls for RTCs that support once-per-second interrupts.
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config RTC_EPOCHYEAR
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bool "RTC epoch year"
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default n
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depends on EXPERIMENTAL
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---help---
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Add controls for RTCs that support epoch year settings.
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Many RTCs encode the year in an 8-bit register which is either interpreted
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as an 8-bit binary number or as a BCD number. In both cases, the number is
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interpreted relative to this RTC's Epoch. The RTC's Epoch is initialized to
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1900 on most systems but on Alpha and MIPS it might also be initialized to
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1952, 1980, or 2000, depending on the value of an RTC register for the year.
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With some RTCs, these operations can be used to read or to set the RTC's
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Epoch, respectively.
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config RTC_IOCTL
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bool "RTC IOCTLs"
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default n
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---help---
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Support the RTC interface ioctl() method. This allows you to add
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architecture-specific RTC operations to the RTC interface
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endif # RTC_DRIVER
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config RTC_EXTERNAL
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bool "External RTC Support"
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default n
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---help---
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In modern MCUs, the RTC is usually implement as an internal
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peripheral to the MCU. An option is to use an external RTC
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connected to the MCU typically via SPI or I2C.
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If an external RTC is connect to the MCU through some bus, then the
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RTC will not be available to the system until after the system
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fully boots up and is able to access the bus. In that case, this
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setting must be included to suppress attempts to initialize the RTC
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early in the boot sequence.
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config RTC_DSXXXX
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bool "DS130x/DS323x RTC Driver"
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default n
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select I2C
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select RTC_DATETIME
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depends on RTC_EXTERNAL
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---help---
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Enables support for the Maxim Integrated DS3231 I2C RTC timer.
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if RTC_DSXXXX
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choice
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prompt "Maxim Integrated RTC"
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default RTC_DS3231
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config RTC_DS1302
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bool "DS1302"
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---help---
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Enables support for the Maxim Integrated DS1302 serial RTC timer.
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config RTC_DS1307
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bool "DS1307"
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---help---
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Enables support for the Maxim Integrated DS1307 I2C RTC timer.
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config RTC_DS3231
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bool "DS3231"
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---help---
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Enables support for the Maxim Integrated DS3231 I2C RTC timer.
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config RTC_DS3232
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bool "DS3232"
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---help---
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Enables support for the Maxim Integrated DS3232 I2C RTC timer.
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config RTC_DS3234
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bool "DS3234"
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depends on EXPERIMENTAL
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---help---
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Enables support for the Maxim Integrated DS3234 SPI RTC timer.
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Not yet implemented.
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endchoice # Maxim Integrated RTC
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config DS3231_I2C_FREQUENCY
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int "DS1307/DS323x I2C frequency"
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default 400000
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range 1 400000
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endif # RTC_DSXXXX
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config RTC_PCF85263
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bool "PCF85263 RTC Driver"
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default n
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select I2C
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select RTC_DATETIME
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depends on RTC_EXTERNAL
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---help---
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Enables support for the Maxim Integrated DS3231 I2C RTC timer.
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if RTC_PCF85263
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config PCF85263_I2C_FREQUENCY
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int "PCF85263 I2C frequency"
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default 400000
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range 1 400000
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endif # RTC_PCF85263
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endif # RTC
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menuconfig WATCHDOG
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bool "Watchdog Timer Support"
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default n
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---help---
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This selection enables building of the "upper-half" watchdog timer
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driver. See include/nuttx/timers/watchdog.h for further watchdog timer driver
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information.
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if WATCHDOG
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config WATCHDOG_DEVPATH
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string "Watchdog Device Path"
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default "/dev/watchdog0"
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endif # WATCHDOG
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config TIMERS_CS2100CP
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bool "CS2100-CP Fraction-N Clock Multiplier"
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depends on I2C
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if TIMERS_CS2100CP
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config CS2100CP_DEBUG
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bool "Enable CS2100-CP Debug Features"
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depends on DEBUG_FEATURES
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config CS2100CP_REGDEBUG
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bool "Enable CS2100-CP Register Debug"
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depends on DEBUG_FEATURES
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endif # TIMERS_CS2100CP
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endmenu # Timer Driver Support
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