30 lines
1.2 KiB
ReStructuredText
30 lines
1.2 KiB
ReStructuredText
Device Tree
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###########
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In the context of sensors device tree provides the initial hardware configuration
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for sensors on a per device level. Each device must specify a device tree binding
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in Zephyr, and ideally, a set of hardware configuration options for things such
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as channel power modes, data rates, filters, decimation, and scales. These can
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then be used in a boards devicetree to configure a sensor to its initial state.
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.. code-block:: dts
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#include <zephyr/dt-bindings/icm42688.h>
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&spi0 {
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/* SPI bus options here, not shown */
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accel_gyro0: icm42688p@0 {
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compatible = "invensense,icm42688";
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reg = <0>;
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int-gpios = <&pioc 6 GPIO_ACTIVE_HIGH>; /* SoC specific pin to select for interrupt line */
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spi-max-frequency = <DT_FREQ_M(24)>; /* Maximum SPI bus frequency */
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accel-pwr-mode = <ICM42688_ACCEL_LN>; /* Low noise mode */
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accel-odr = <ICM42688_ACCEL_ODR_2000>; /* 2000 Hz sampling */
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accel-fs = <ICM42688_ACCEL_FS_16>; /* 16G scale */
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gyro-pwr-mode = <ICM42688_GYRO_LN>; /* Low noise mode */
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gyro-odr = <ICM42688_GYRO_ODR_2000>; /* 2000 Hz sampling */
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gyro-fs = <ICM42688_GYRO_FS_16>; /* 16G scale */
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};
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};
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