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adc: Move ADC acquisition time macros

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Move the ADC acquisition time macros so that they can be utiliized by
devicetrees.

Signed-off-by: Keith Short <keithshort@google.com>
This commit is contained in:
Keith Short 2021-04-24 11:08:07 -06:00 • committed by Anas Nashif
commit e7a9775cca
2 changed files with 32 additions and 14 deletions
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15
include/drivers/adc.h
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@ -14,6 +14,7 @@
#define ZEPHYR_INCLUDE_DRIVERS_ADC_H_ #define ZEPHYR_INCLUDE_DRIVERS_ADC_H_
#include <device.h> #include <device.h>
#include <dt-bindings/adc/adc.h>
#ifdef __cplusplus #ifdef __cplusplus
extern "C" { extern "C" {
@ -75,20 +76,6 @@ enum adc_reference {
ADC_REF_EXTERNAL1, /**< External, input 1. */ ADC_REF_EXTERNAL1, /**< External, input 1. */
}; };
/** Acquisition time is expressed in microseconds. */
#define ADC_ACQ_TIME_MICROSECONDS (1u)
/** Acquisition time is expressed in nanoseconds. */
#define ADC_ACQ_TIME_NANOSECONDS (2u)
/** Acquisition time is expressed in ADC ticks. */
#define ADC_ACQ_TIME_TICKS (3u)
/** Macro for composing the acquisition time value in given units. */
#define ADC_ACQ_TIME(unit, value) (((unit) << 14) | ((value) & BIT_MASK(14)))
/** Value indicating that the default acquisition time should be used. */
#define ADC_ACQ_TIME_DEFAULT 0
#define ADC_ACQ_TIME_UNIT(time) (((time) >> 14) & BIT_MASK(2))
#define ADC_ACQ_TIME_VALUE(time) ((time) & BIT_MASK(14))
/** /**
* @brief Structure for specifying the configuration of an ADC channel. * @brief Structure for specifying the configuration of an ADC channel.
*/ */

31
include/dt-bindings/adc/adc.h Normal file
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@ -0,0 +1,31 @@
/*
* Copyright 2021 Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_ADC_ADC_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_ADC_ADC_H_
/*
* Provide the BIT_MASK() macro for when this file is included from
* devicetrees.
*/
#ifndef BIT_MASK
#define BIT_MASK(n) ((1 << (n)) - 1)
#endif
/** Acquisition time is expressed in microseconds. */
#define ADC_ACQ_TIME_MICROSECONDS (1)
/** Acquisition time is expressed in nanoseconds. */
#define ADC_ACQ_TIME_NANOSECONDS (2)
/** Acquisition time is expressed in ADC ticks. */
#define ADC_ACQ_TIME_TICKS (3)
/** Macro for composing the acquisition time value in given units. */
#define ADC_ACQ_TIME(unit, value) (((unit) << 14) | ((value) & BIT_MASK(14)))
/** Value indicating that the default acquisition time should be used. */
#define ADC_ACQ_TIME_DEFAULT 0
#define ADC_ACQ_TIME_UNIT(time) (((time) >> 14) & BIT_MASK(2))
#define ADC_ACQ_TIME_VALUE(time) ((time) & BIT_MASK(14))
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_ADC_ADC_H_ */