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bjarki-andreasenrlubos
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[nrf fromtree] tests: drivers: comparator: add gpio_loopback test suite
Add test suite which uses GPIO loopback to produce a "very low" and "very high" voltage at the positive input of the comparator using the output of a GPIO. The negative input is set to a voltage between the high and low output voltages of the GPIO using whichever internal reference is available to the comparator. Signed-off-by: Bjarki Arge Andreasen <[email protected]> (cherry picked from commit 3272db8)
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‎tests/drivers/comparator/gpio_loopback/CMakeLists.txt

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# Copyright (c) 2024 Nordic Semiconductor
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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(comparator_gpio_loopback)
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target_sources(app PRIVATE src/test.c)

‎tests/drivers/comparator/gpio_loopback/boards/frdm_ke15z.overlay

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/*
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* Copyright (c) 2024 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <nxp/kinetis/MKE17Z256VLL7-pinctrl.h>
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#include <zephyr/dt-bindings/gpio/gpio.h>
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/*
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* PTA1 looped back to PTA0
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*/
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/ {
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aliases {
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test-comp = &cmp0;
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};
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zephyr,user {
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test-gpios = <&gpioa 1 GPIO_ACTIVE_HIGH>;
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};
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};
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&gpioa {
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status = "okay";
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};
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&pinctrl {
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cmp0_default: cmp0_default {
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group0 {
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pinmux = <ACMP0_IN0_PTA0>;
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drive-strength = "high";
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};
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};
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};
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&cmp0 {
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pinctrl-0 = <&cmp0_default>;
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pinctrl-names = "default";
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status = "okay";
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positive-mux-input = "IN0";
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positive-port-input = "MUX";
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negative-mux-input = "IN0";
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negative-port-input = "DAC";
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dac-vref-source = "VIN1";
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dac-value = <128>;
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dac-enable;
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};

‎tests/drivers/comparator/gpio_loopback/boards/nrf5340dk_nrf5340_cpuapp.overlay

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/*
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* Copyright (c) 2024 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/dt-bindings/gpio/gpio.h>
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/*
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* P0.05 looped back to P0.04
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*/
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/ {
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aliases {
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test-comp = &comp;
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};
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zephyr,user {
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test-gpios = <&gpio0 5 GPIO_ACTIVE_HIGH>;
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};
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};
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&gpio0{
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status = "okay";
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};

‎tests/drivers/comparator/gpio_loopback/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

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/*
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* Copyright (c) 2024 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/dt-bindings/gpio/gpio.h>
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/*
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* P1.03 looped back to P1.02
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*/
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/ {
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aliases {
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test-comp = &comp;
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};
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zephyr,user {
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test-gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
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};
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};
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&gpio1 {
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status = "okay";
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};
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/* Temporary workaround to reserve P1.03 for cpuapp */
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&led1 {
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gpios = < &gpio1 0x3 0x0 >;
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};
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/* Temporary workaround to reserve P1.02 for cpuapp */
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&led2 {
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gpios = < &gpio1 0x2 0x0 >;
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};

‎tests/drivers/comparator/gpio_loopback/boards/nrf54l15dk_nrf54l15_cpuapp.overlay

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/*
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* Copyright (c) 2024 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/dt-bindings/gpio/gpio.h>
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/*
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* P1.10 looped back to P1.11
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*/
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/ {
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aliases {
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test-comp = &comp;
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};
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zephyr,user {
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test-gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
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};
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};
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&gpio1 {
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status = "okay";
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};

‎tests/drivers/comparator/gpio_loopback/prj.conf

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# Copyright (c) 2024 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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CONFIG_ZTEST=y
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CONFIG_GPIO=y
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CONFIG_COMPARATOR=y

‎tests/drivers/comparator/gpio_loopback/snippets/nrf_comp/boards/nrf5340dk_nrf5340_cpuapp.overlay

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/*
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* Copyright (c) 2024 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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&comp {
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main-mode = "SE";
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psel = "AIN0"; /* P0.04 */
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refsel = "VDD";
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sp-mode = "HIGH";
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th-up = <34>;
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th-down = <30>;
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isource = "DISABLED";
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status = "okay";
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};

‎tests/drivers/comparator/gpio_loopback/snippets/nrf_comp/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

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/*
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* Copyright (c) 2024 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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&comp {
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main-mode = "SE";
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psel = "AIN2"; /* P1.02 */
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refsel = "INT_1V2";
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sp-mode = "HIGH";
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th-up = <63>;
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th-down = <59>;
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isource = "DISABLED";
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status = "okay";
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};

‎tests/drivers/comparator/gpio_loopback/snippets/nrf_comp/boards/nrf54l15dk_nrf54l15_cpuapp.overlay

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/*
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* Copyright (c) 2024 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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&comp {
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main-mode = "SE";
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psel = "AIN4"; /* P1.11 */
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refsel = "INT_1V2";
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sp-mode = "HIGH";
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th-up = <63>;
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th-down = <59>;
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isource = "DISABLED";
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status = "okay";
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};

‎tests/drivers/comparator/gpio_loopback/snippets/nrf_comp/snippet.yml

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# Copyright 2024 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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name: gpio_loopback_nrf_comp
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boards:
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nrf54h20dk/nrf54h20/cpuapp:
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append:
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EXTRA_DTC_OVERLAY_FILE: boards/nrf54h20dk_nrf54h20_cpuapp.overlay
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nrf54l15dk/nrf54l15/cpuapp:
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append:
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EXTRA_DTC_OVERLAY_FILE: boards/nrf54l15dk_nrf54l15_cpuapp.overlay
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nrf5340dk/nrf5340/cpuapp:
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append:
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EXTRA_DTC_OVERLAY_FILE: boards/nrf5340dk_nrf5340_cpuapp.overlay

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