52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
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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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// 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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#ifndef MAIN_ESP32_HAL_TOUCH_H_
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#define MAIN_ESP32_HAL_TOUCH_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "esp32-hal.h"
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/*
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* Set cycles that measurement operation takes
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* The result from touchRead, threshold and detection
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* accuracy depend on these values. Defaults are
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* 0x1000 for measure and 0x1000 for sleep.
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* With default values touchRead takes 0.5ms
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* */
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void touchSetCycles(uint16_t measure, uint16_t sleep);
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/*
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* Read touch pad (values close to 0 mean touch detected)
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* You can use this method to chose a good threshold value
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* to use as value for touchAttachInterrupt
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* */
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uint16_t touchRead(uint8_t pin);
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/*
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* Set function to be called if touch pad value falls
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* below the given threshold. Use touchRead to determine
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* a proper threshold between touched and untouched state
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* */
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void touchAttachInterrupt(uint8_t pin, void (*userFunc)(void), uint16_t threshold);
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#ifdef __cplusplus
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}
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#endif
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#endif /* MAIN_ESP32_HAL_TOUCH_H_ */
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