63 lines
1.4 KiB
YAML
63 lines
1.4 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/avia-hx711.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: AVIA HX711 ADC chip for weight cells
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maintainers:
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- Andreas Klinger <ak@it-klinger.de>
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description: |
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The HX711 is a 24-bit ADC with selectable gain (32/64/128) and two
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differential input channels. Channel A supports gain 64 and 128;
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channel B supports gain 32.
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properties:
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compatible:
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enum:
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- avia,hx711
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sck-gpios:
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description:
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GPIO for the clock output (PD_SCK in the datasheet).
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maxItems: 1
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dout-gpios:
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description:
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GPIO for the data output from the sensor (DOUT in the datasheet).
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maxItems: 1
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avdd-supply:
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description:
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Analog supply voltage (AVDD).
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clock-frequency:
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description:
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Controls the SCK bit-bang timing. The value is used to derive the
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delay between SCK edges; keep the SCK high time below 60 us to
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avoid triggering chip power-down mode.
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minimum: 20000
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maximum: 2500000
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default: 400000
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required:
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- compatible
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- sck-gpios
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- dout-gpios
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- avdd-supply
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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weight {
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compatible = "avia,hx711";
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sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;
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dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
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avdd-supply = <&avdd>;
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clock-frequency = <100000>;
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};
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