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#ifndef _1wire_h_
#define _1wire_h_
#define MATCH_ROM 0x55
#define SKIP_ROM 0xCC
#define SEARCH_ROM 0xF0
#define CONVERT_T 0x44 // DS1820 commands
#define READ 0xBE
#define WRITE 0x4E
#define EE_WRITE 0x48
#define EE_RECALL 0xB8
#define SEARCH_FIRST 0xFF // start new search
#define PRESENCE_ERR 0xFF
#define DATA_ERR 0xFE
#define LAST_DEVICE 0x00 // last device found
// 0x01 ... 0x40: continue searching
uint8_t w1_reset(void);
uint8_t w1_byte_wr( uint8_t b );
uint8_t w1_byte_rd( void );
uint8_t w1_rom_search( uint8_t diff, uint8_t idata *id );
void w1_command( uint8_t command, uint8_t idata *id );
#endif
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