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c9caf1806a
Add driver for the DHT temperature and relative himidity sensor family. The sensor has a single signal pin (in addition to GND and VDD) over which communication is done in a half-duplex manner (see datasheet for more details). Datasheets: http://www.micropik.com/PDF/dht11.pdf https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf http://akizukidenshi.com/download/ds/aosong/AM2302.pdf Origin: Original Change-Id: If8c8be73d7fdfef2ab2091bf9b8fe72bcd700ed1 Signed-off-by: Bogdan Davidoaia <bogdan.m.davidoaia@intel.com>
36 lines
957 B
C
36 lines
957 B
C
/*
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* Copyright (c) 2016 Intel Corporation
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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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#ifndef _SENSOR_DHT
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#define _SENSOR_DHT
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#include <device.h>
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#define SYS_LOG_DOMAIN "DHT"
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#define SYS_LOG_LEVEL CONFIG_DHT_SYS_LOG_LEVEL
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#include <misc/sys_log.h>
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#define DHT_START_SIGNAL_DURATION 18000
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#define DHT_SIGNAL_MAX_WAIT_DURATION 100
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#define DHT_DATA_BITS_NUM 40
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struct dht_data {
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struct device *gpio;
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uint8_t sample[4];
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};
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#endif
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