File content as of revision 0:1197076b78f4:

typedef unsigned char BYTE;


#define MAXSENSORS 8
// rom-code size including CRC
#define OW_ROMCODE_SIZE 8




BYTE ow_reset(void);
BYTE ow_rom_search( BYTE diff, BYTE *id );
void ow_command( BYTE command, BYTE *id );
//void DS18X20_find_sensor(BYTE *diff, BYTE id[]);
BYTE DS18X20_get_power_status(uint8_t id[]);

extern void DS18X20_show_id_uart( uint8_t *id, size_t n );
extern void DS18X20_find_sensor(uint8_t *diff, uint8_t id[]);    
extern uint8_t    DS18X20_get_power_status(uint8_t id[]);
extern uint8_t DS18X20_start_meas( uint8_t with_external, uint8_t id[]);
extern uint8_t DS18X20_read_meas(uint8_t id[], uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits);
extern uint8_t DS18X20_read_meas_single(uint8_t familycode, uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits);
extern uint8_t DS18X20_meas_to_cel( uint8_t fc, uint8_t *sp, uint8_t* subzero, uint8_t* cel, uint8_t* cel_frac_bits);
extern uint16_t DS18X20_temp_to_decicel(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits);
extern int8_t DS18X20_temp_cmp(uint8_t subzero1, uint16_t cel1, uint8_t subzero2, uint16_t cel2);


extern void ow_parasite_enable(void);
extern void ow_parasite_disable(void);

#define DEBUG 1

#define ONEWIRE_PIN  p12


#define OW_MATCH_ROM    0x55
#define OW_SKIP_ROM     0xCC
#define OW_SEARCH_ROM    0xF0


#define OW_SHORT_CIRCUIT  0xFF
#define OW_SEARCH_FIRST    0xFF        // start new search
#define OW_PRESENCE_ERR    0x01
#define OW_DATA_ERR     0xFE
#define OW_LAST_DEVICE    0x00        // last device found
//            0x01 ... 0x40: continue searching

// rom-code size including CRC
#define OW_ROMCODE_SIZE 8


#define DS18X20_POWER_PARASITE 0x00
#define DS18X20_POWER_EXTERN   0x01

/* DS18X20 specific values (see datasheet) */
#define DS18S20_ID 0x10
#define DS18B20_ID 0x28
#define DS18X20_CONVERT_T    0x44
#define DS18X20_READ        0xBE
#define DS18X20_WRITE        0x4E
#define DS18X20_EE_WRITE    0x48
#define DS18X20_EE_RECALL    0xB8
#define DS18X20_READ_POWER_SUPPLY 0xB4

#define DS18X20_OK          0x00
#define DS18X20_ERROR       0x01
#define DS18X20_START_FAIL  0x02
#define DS18X20_ERROR_CRC   0x03


#define DS18B20_CONF_REG    4
#define DS18B20_9_BIT       0
#define DS18B20_10_BIT      (1<<5)
#define DS18B20_11_BIT      (1<<6)
#define DS18B20_12_BIT      ((1<<6)|(1<<5))

// indefined bits in LSB if 18B20 != 12bit
#define DS18B20_9_BIT_UNDF       ((1<<0)|(1<<1)|(1<<2))
#define DS18B20_10_BIT_UNDF      ((1<<0)|(1<<1))
#define DS18B20_11_BIT_UNDF      ((1<<0))
#define DS18B20_12_BIT_UNDF      0

// conversion times in ms
#define DS18B20_TCONV_12BIT      750
#define DS18B20_TCONV_11BIT      DS18B20_TCONV_12_BIT/2
#define DS18B20_TCONV_10BIT      DS18B20_TCONV_12_BIT/4
#define DS18B20_TCONV_9BIT       DS18B20_TCONV_12_BIT/8
#define DS18S20_TCONV            DS18B20_TCONV_12_BIT

// constant to convert the fraction bits to cel*(10^-4)
#define DS18X20_FRACCONV         625

#define DS18X20_SP_SIZE  9

// DS18X20 EEPROM-Support
#define DS18X20_WRITE_SCRATCHPAD  0x4E
#define DS18X20_COPY_SCRATCHPAD   0x48
#define DS18X20_RECALL_E2         0xB8
#define DS18X20_COPYSP_DELAY      10 /* ms */
#define DS18X20_TH_REG      2
#define DS18X20_TL_REG      3