/********************************************************************************
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* Copyright: (C) 2020 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: ds18b20.h
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* Description: This head file is get temperature by DS18B20 on RaspberryPi
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*
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* Version: 1.0.0(2020年04月15日)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "2020年04月15日 23时37分38秒"
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*
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********************************************************************************/
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#ifndef _DS18B20_H_
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#define _DS18B20_H_
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#include <stdint.h>
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/* description: get temperature by DS18B20 on RaspberryPi
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* return value: 0: Successfully <0: Failure
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* output value: $temp: temperature value saved in two bytes:
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* byte[0]: fractional part, two digits after
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* byte[1]: integer part
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*/
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int ds18b20_get_temperature(uint16_t *temp);
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#define temper_integer(x) (((x)>>8) & 0xFF)
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#define temper_fract(x) ( (x) & 0xFF)
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#endif /* ----- #ifndef _DS18B20_H_ ----- */
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