129 lines
2.3 KiB
YAML
129 lines
2.3 KiB
YAML
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# Copyright (c) 2024 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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description: |
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Nordic nRF COMP (analog COMParator)
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This comparator has varying configurations which require varying
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properties be set in the devicetree.
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The following example displays the minimum node layout:
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comp: comp@deadbeef {
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compatible = "nordic,nrf-comp";
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reg = <0xdeadbeef 0x1000>;
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interrupts = <0 NRF_DEFAULT_IRQ_PRIORITY>;
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status = "disabled";
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};
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Enabling the comparator node requires setting the default
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configuration of the comparator.
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The following example displays enabling the comparator in
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single-ended mode, selecting an internal reference:
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&comp {
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status = "okay";
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main-mode = "SE";
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psel = "AIN0";
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refsel = "INT_1V2";
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sp-mode = "NORMAL";
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th-up = <36>;
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th-down = <30>;
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isource = "OFF";
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};
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To select an external reference, select the "AREF"
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reference and add the external reference:
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&comp {
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...
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refsel = "AREF";
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extrefsel = "AIN1";
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...
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};
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The following example displays enabling the comparator
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in differential mode:
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&comp {
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status = "okay";
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main-mode = "DIFF";
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psel = "AIN0";
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extrefsel = "AIN1";
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sp-mode = "NORMAL";
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hyst = "50MV";
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isource = "OFF";
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};
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compatible: "nordic,nrf-comp"
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include: base.yaml
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properties:
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main-mode:
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type: string
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enum:
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- "SE"
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- "DIFF"
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psel:
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type: string
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enum:
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- "AIN0"
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- "AIN1"
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- "AIN2"
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- "AIN3"
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- "AIN4"
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- "AIN5"
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- "AIN6"
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- "AIN7"
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- "VDD_DIV2"
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- "VDDH_DIV5"
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extrefsel:
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type: string
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enum:
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- "AIN0"
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- "AIN1"
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- "AIN2"
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- "AIN3"
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- "AIN4"
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- "AIN5"
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- "AIN6"
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- "AIN7"
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refsel:
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type: string
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enum:
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- "INT_1V2"
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- "INT_1V8"
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- "INT_2V4"
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- "AVDDAO1V8"
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- "VDD"
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- "AREF"
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enable-hyst:
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type: boolean
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sp-mode:
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type: string
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enum:
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- "LOW"
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- "NORMAL"
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- "HIGH"
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th-up:
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type: int
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th-down:
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type: int
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isource:
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type: string
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enum:
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- "DISABLED"
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- "2UA5"
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- "5UA"
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- "10UA"
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