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feda284004
This patch adds support for the ultrasonic ranger srf04 of devantech.
This device is measuring the distance of objects in a range between 1 cm
and 3 meters and a theoretical resolution of 3 mm.
There are two GPIOs used:
- trigger: set as output to the device when the measurement should start
- echo: set by the device when the ultrasonic wave is sent out and reset
when the echo is recognized; this needs to be an interrupt input
The time between setting and resetting the echo pin is the time the
waveform needed for one round trip. This time is recorded in the interrupt
handler.
The distance is calculated in the read function by using the ultrasonic
speed at 20 degrees celsius which is about 343 m/s.
Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
71 lines
1.7 KiB
Plaintext
71 lines
1.7 KiB
Plaintext
#
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# Proximity sensors
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#
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menu "Lightning sensors"
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config AS3935
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tristate "AS3935 Franklin lightning sensor"
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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depends on SPI
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help
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Say Y here to build SPI interface support for the Austrian
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Microsystems AS3935 lightning detection sensor.
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To compile this driver as a module, choose M here: the
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module will be called as3935
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endmenu
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menu "Proximity and distance sensors"
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config LIDAR_LITE_V2
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tristate "PulsedLight LIDAR sensor"
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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depends on I2C
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help
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Say Y to build a driver for PulsedLight LIDAR range finding
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sensor.
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To compile this driver as a module, choose M here: the
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module will be called pulsedlight-lite-v2
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config SRF04
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tristate "Devantech SRF04 ultrasonic ranger sensor"
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depends on GPIOLIB
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help
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Say Y here to build a driver for Devantech SRF04 ultrasonic
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ranger sensor. This driver can be used to measure the distance
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of objects. It is using two GPIOs.
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To compile this driver as a module, choose M here: the
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module will be called srf04.
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config SX9500
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tristate "SX9500 Semtech proximity sensor"
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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select REGMAP_I2C
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depends on I2C
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help
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Say Y here to build a driver for Semtech's SX9500 capacitive
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proximity/button sensor.
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To compile this driver as a module, choose M here: the
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module will be called sx9500.
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config SRF08
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tristate "Devantech SRF08 ultrasonic ranger sensor"
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depends on I2C
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help
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Say Y here to build a driver for Devantech SRF08 ultrasonic
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ranger sensor. This driver can be used to measure the distance
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of objects.
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To compile this driver as a module, choose M here: the
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module will be called srf08.
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endmenu
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