2016-01-26 23:58:18 +08:00
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#
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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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2020-02-06 12:21:22 +08:00
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config ARCH_HAVE_I2CRESET
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bool
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default n
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2016-01-26 23:58:18 +08:00
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2020-02-15 21:38:35 +08:00
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menuconfig I2C
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bool "I2C 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" I2C driver.
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See include/nuttx/i2c/i2c_master.h for further I2C driver information.
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2020-02-08 15:30:09 +08:00
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if I2C
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2016-01-26 23:58:18 +08:00
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config I2C_SLAVE
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bool "I2C Slave"
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default n
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config I2C_POLLED
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bool "Polled I2C (no interrupts)"
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default n
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2016-02-02 22:30:54 +08:00
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config I2C_RESET
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2016-02-03 01:21:48 +08:00
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bool "Support I2C reset interface method"
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2016-02-02 22:30:54 +08:00
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default n
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depends on ARCH_HAVE_I2CRESET
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2016-01-26 23:58:18 +08:00
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config I2C_TRACE
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bool "Enable I2C trace debug"
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default n
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config I2C_NTRACE
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int "Number of I2C trace records"
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default 32
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depends on I2C_TRACE
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2021-01-19 11:05:49 +08:00
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config I2C_BITBANG
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bool "I2C bitbang implementation"
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default n
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---help---
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Enable support for a bitbang implementation of I2C
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if I2C_BITBANG
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config I2C_BITBANG_NO_DELAY
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bool "Do not add delay"
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default n
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---help---
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If you want to go full speed (depending on how fast pins can be toggled)
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you can enable this option. This will not respect the desired frequency
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set during the I2C transfer operation.
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config I2C_BITBANG_GPIO_OVERHEAD
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int "GPIO overhead"
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depends on !I2C_BITBANG_NO_DELAY
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default 0
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---help---
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Overhead of GPIO toggling operation to consider when computing
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delays. This overhead will be subtracted from sleep times to achieve
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desired frquency.
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config I2C_BITBANG_TIMEOUT
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int "I2C timeout"
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default 1000
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---help---
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Timeout (microseconds) to abort wait on slave
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config I2C_BITBANG_CLOCK_STRETCHING
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bool "Support clock stretching"
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default n
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---help---
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This enables I2C clock stretching. This requires the hardware to set
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the pin into open-collector mode (master sets SCL high and waits until
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slave stops holding it low).
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endif # I2C_BITBANG
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2016-02-02 22:30:54 +08:00
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config I2C_DRIVER
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bool "I2C character driver"
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2016-01-26 23:58:18 +08:00
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default n
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2016-08-06 01:07:35 +08:00
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---help---
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Build in support for a character driver at /dev/i2c[N] that may be
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used to perform I2C bus transfers from applications. The intent of
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this driver is to support I2C testing. It is not suitable for use
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in any real driver application.
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2016-01-26 23:58:18 +08:00
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2018-03-06 00:11:05 +08:00
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menu "I2C Multiplexer Support"
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config I2CMULTIPLEXER_PCA9540BDP
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bool "PCA9540BDP NXP multiplexer"
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default n
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depends on I2C
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---help---
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Enable support for the NXP PCA9540BDP i2c multiplexer
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# put more i2c mux devices here
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endmenu # I2C Multiplexer Support
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2020-02-08 15:30:09 +08:00
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endif
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