60 lines
2.7 KiB
C
60 lines
2.7 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2022 Joey Castillo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "phototransistor_driver.h"
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#include "watch.h"
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#include "watch_utility.h"
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void phototransistor_driver_enable(void) {
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// Enable the ADC peripheral, which we'll use to read the phototransistor value.
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watch_enable_adc();
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// Enable analog circuitry on the sense pin, which is tied to the phototransistor's base.
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watch_enable_analog_input(PHOTOTRANSISTOR_SENSE_PIN);
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// Enable digital output on the enable pin, which is the power to the phototransistor circuit.
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watch_enable_digital_output(PHOTOTRANSISTOR_ENABLE_PIN);
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// and make sure it's off.
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// watch_set_pin_level(PHOTOTRANSISTOR_ENABLE_PIN, !PHOTOTRANSISTOR_ENABLE_VALUE);
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watch_set_pin_level(PHOTOTRANSISTOR_ENABLE_PIN, PHOTOTRANSISTOR_ENABLE_VALUE);
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}
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void phototransistor_driver_disable(void) {
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// Disable the ADC peripheral.
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watch_disable_adc();
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// Disable analog circuitry on the sense pin to save power.
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watch_disable_analog_input(PHOTOTRANSISTOR_SENSE_PIN);
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// Disable the enable pin's output circuitry.
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watch_disable_digital_output(PHOTOTRANSISTOR_ENABLE_PIN);
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}
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uint16_t phototransistor_driver_get_light_level(void) {
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// set the enable pin to the level that powers the phototransistor circuit.
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// watch_set_pin_level(PHOTOTRANSISTOR_ENABLE_PIN, PHOTOTRANSISTOR_ENABLE_VALUE);
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// get the sense pin level
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uint16_t value = watch_get_analog_pin_level(PHOTOTRANSISTOR_SENSE_PIN);
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// and then set the enable pin to the opposite value to power down the phototransistor circuit.
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// watch_set_pin_level(PHOTOTRANSISTOR_ENABLE_PIN, !PHOTOTRANSISTOR_ENABLE_VALUE);
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return value;
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}
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