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samples/drivers/adc: Add support for nRF52840 DK and nRF51 DK boards

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The overlay for the nRF52840 DK board uses ADC controller child nodes
for specifying channel configurations and it shows how to configure
a channel in differential input mode, so it can serve as an example
of how to use these new possibilities. The overlay for the nRF51 DK
board shows how to use a specific ADC resolution (the default 12 bit
setting is not supported by nRF51 SoCs).

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
This commit is contained in:
Andrzej Głąbek 2022-02-21 17:29:46 +01:00 • committed by Marti Bolivar
commit 07b4362bac
3 changed files with 75 additions and 1 deletions
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26
samples/drivers/adc/boards/nrf51dk_nrf51422.overlay Normal file
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@ -0,0 +1,26 @@
/*
* SPDX-License-Identifier: Apache-2.0
*
* Copyright (c) 2022 Nordic Semiconductor ASA
*/
/ {
zephyr,user {
io-channels = <&adc 0>;
};
};
&adc {
#address-cells = <1>;
#size-cells = <0>;
channel@0 {
reg = <0>;
zephyr,gain = "ADC_GAIN_1_3";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,input-positive = <NRF_ADC_AIN2>; /* P0.01 */
zephyr,resolution = <10>;
};
};

45
samples/drivers/adc/boards/nrf52840dk_nrf52840.overlay Normal file
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@ -0,0 +1,45 @@
/*
* SPDX-License-Identifier: Apache-2.0
*
* Copyright (c) 2022 Nordic Semiconductor ASA
*/
/ {
zephyr,user {
io-channels = <&adc 0>, <&adc 1>, <&adc 7>;
};
};
&adc {
#address-cells = <1>;
#size-cells = <0>;
channel@0 {
reg = <0>;
zephyr,gain = "ADC_GAIN_1_6";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,input-positive = <NRF_SAADC_AIN1>; /* P0.03 */
};
channel@1 {
reg = <1>;
zephyr,gain = "ADC_GAIN_1_6";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,input-positive = <NRF_SAADC_VDD>;
zephyr,resolution = <14>;
zephyr,oversampling = <8>;
};
channel@7 {
reg = <7>;
zephyr,gain = "ADC_GAIN_1_5";
zephyr,reference = "ADC_REF_VDD_1_4";
zephyr,vref-mv = <750>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,input-positive = <NRF_SAADC_AIN6>; /* P0.30 */
zephyr,input-negative = <NRF_SAADC_AIN7>; /* P0.31 */
};
};

5
samples/drivers/adc/sample.yaml
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@ -5,7 +5,10 @@ tests:
tags: ADC
depends_on: adc
platform_allow: nucleo_l073rz disco_l475_iot1 cc3220sf_launchxl
cc3235sf_launchxl stm32l496g_disco
cc3235sf_launchxl stm32l496g_disco nrf51dk_nrf51422 nrf52840dk_nrf52840
integration_platforms:
- nucleo_l073rz
- nrf52840dk_nrf52840
harness: console
timeout: 10
harness_config: