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https://github.com/eddyem/stm32samples.git
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49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
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* This file is part of the DHT22 project.
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* Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef DHT_H__
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#define DHT_H__
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#include <stm32f1.h>
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// define it to work with DHT11
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//#define DHT11
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// reset pulse length in ms
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#define DHT_RESETPULSE_LEN (20)
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// max measurement length
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#define DHT_MEASUR_LEN (50)
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// state of device
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typedef enum{
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DHT_SLEEP,
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DHT_RESETTING,
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DHT_MEASURING,
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DHT_GOTRESULT,
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DHT_ERROR
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} DHT_state;
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void DHT_pinsetup();
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int DHT_start(uint32_t Tms);
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DHT_state DHT_getstate();
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void DHT_process(uint32_t Tms);
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void DHT_getdata(uint16_t *Hum, int16_t *T);
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#endif // DHT_H__
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