Line data    Source code

       1            0 : /*
       2              :  * SPDX-License-Identifier: Apache-2.0
       3              :  *
       4              :  * Copyright (c) 2024 Nordic Semiconductor ASA
       5              :  */
       6              : 
       7              : #ifndef ZEPHYR_INCLUDE_DT_BINDINGS_ADC_NRF_SAADC_H_
       8              : #define ZEPHYR_INCLUDE_DT_BINDINGS_ADC_NRF_SAADC_H_
       9              : 
      10              : /**
      11              :  * @brief Short ADC negative input to ground
      12              :  *
      13              :  * @details The nRF SAADC hardware only supports differential readings.
      14              :  * The nRF SAADC SE (single ended) mode is differential with the negative
      15              :  * input shorted to GND (ground). To use the nRF SAADC SE mode, set the
      16              :  * negative input to NRF_SAADC_GND:
      17              :  *
      18              :  * @code{.dts}
      19              :  *   zephyr,input-positive = <NRF_SAADC_AIN3>;
      20              :  *   zephyr,input-negative = <NRF_SAADC_GND>;
      21              :  * @endcode
      22              :  *
      23              :  * The nRF SAADC driver also supports using the nRF SAADC SE mode in
      24              :  * emulated "single-ended" mode, as defined by zephyr. In this mode,
      25              :  * negative readings will be clamped to 0 by software to emulate the
      26              :  * behavior of an ADC in "single-ended" mode, as defined by zephyr. To
      27              :  * do this, only define the positive input:
      28              :  *
      29              :  * @code{.dts}
      30              :  *   zephyr,input-positive = <NRF_SAADC_AIN3>;
      31              :  * @endcode
      32              :  */
      33            1 : #define NRF_SAADC_GND  0
      34            0 : #define NRF_SAADC_AIN0 1
      35            0 : #define NRF_SAADC_AIN1 2
      36            0 : #define NRF_SAADC_AIN2 3
      37            0 : #define NRF_SAADC_AIN3 4
      38            0 : #define NRF_SAADC_AIN4 5
      39            0 : #define NRF_SAADC_AIN5 6
      40            0 : #define NRF_SAADC_AIN6 7
      41            0 : #define NRF_SAADC_AIN7 8
      42              : 
      43              : #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_ADC_NRF_SAADC_H_ */