54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
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/*
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ds18b20 lib 0x02
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copyright (c) Davide Gironi, 2012
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Released under GPLv3.
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Please refer to LICENSE file for licensing information.
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References:
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+ Using DS18B20 digital temperature sensor on AVR microcontrollers
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by Gerard Marull Paretas, 2007
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http://teslabs.com/openplayer/docs/docs/other/ds18b20_pre1.pdf
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*/
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#ifndef DS18B20_H_
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#define DS18B20_H_
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#include <avr/io.h>
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//setup connection
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#define DS18B20_PORT PORTD
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#define DS18B20_DDR DDRD
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#define DS18B20_PIN PIND
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#define DS18B20_DQ PD7
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//commands
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#define DS18B20_CMD_CONVERTTEMP 0x44
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#define DS18B20_CMD_RSCRATCHPAD 0xbe
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#define DS18B20_CMD_WSCRATCHPAD 0x4e
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#define DS18B20_CMD_CPYSCRATCHPAD 0x48
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#define DS18B20_CMD_RECEEPROM 0xb8
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#define DS18B20_CMD_RPWRSUPPLY 0xb4
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#define DS18B20_CMD_SEARCHROM 0xf0
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#define DS18B20_CMD_READROM 0x33
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#define DS18B20_CMD_MATCHROM 0x55
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#define DS18B20_CMD_SKIPROM 0xcc
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#define DS18B20_CMD_ALARMSEARCH 0xec
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//stop any interrupt on read
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#define DS18B20_STOPINTERRUPTONREAD 1
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//functions
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uint8_t ds18b20_reset(void);
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void ds18b20_writebit(uint8_t bit);
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uint8_t ds18b20_readbit(void);
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void ds18b20_writebyte(uint8_t byte);
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uint8_t ds18b20_readbyte(void);
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extern double ds18b20_gettemp(void);
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#endif
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