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54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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//! Light level enum
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typedef enum AmbientLightLevel {
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AmbientLightLevelUnknown = 0,
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AmbientLightLevelVeryDark,
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AmbientLightLevelDark,
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AmbientLightLevelLight,
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AmbientLightLevelVeryLight,
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} AmbientLightLevel;
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#define AMBIENT_LIGHT_LEVEL_ENUM_COUNT (AmbientLightLevelVeryLight + 1)
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static const uint32_t AMBIENT_LIGHT_LEVEL_MAX = 4096; // max 12 bits
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/** Initialize the ambient light sensor */
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void ambient_light_init(void);
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/** get the ambient light level scaled between 0 and AMBIENT_LIGHT_LEVEL_MAX
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*/
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uint32_t ambient_light_get_light_level(void);
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//! get the threshold between light and dark
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uint32_t ambient_light_get_dark_threshold(void);
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//! set the threshold between light and dark
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void ambient_light_set_dark_threshold(uint32_t new_threshold);
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//! figure out whether it is light outside
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bool ambient_light_is_light();
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//! Convert a light level obtained from ambient_light_get_light_level() into an
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//! AmbientLightLevel enum value.
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//! @param[in] light_level the raw light level reading obtained from ambient_light_get_light_level
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AmbientLightLevel ambient_light_level_to_enum(uint32_t light_level);
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