2 * 1 wire header which defines functions and constants
7 * Daniel O'Connor <darius@dons.net.au>. All rights reserved.
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32 uint8_t OWTouchReset(void);
33 void OWWriteBit(uint8_t bit);
34 uint8_t OWReadBit(void);
35 void OWWriteByte(uint8_t data);
36 uint8_t OWReadByte(void);
37 uint8_t OWTouchByte(uint8_t data);
38 void OWBlock(uint8_t *data, int len);
39 uint8_t OWFirst(uint8_t *ROM, uint8_t do_reset, uint8_t alarm_only);
40 uint8_t OWNext(uint8_t *ROM, uint8_t do_reset, uint8_t alarm_only);
41 void OWCRC(uint8_t x, uint8_t *crc);
42 void OWSendCmd(uint8_t *ROM, uint8_t cmd);
43 uint8_t OWProgROM(uint8_t *ROM, uint8_t start, uint8_t len, uint8_t *data, uint8_t exact, uint8_t status);
44 int16_t OWGetTemp(uint8_t *ROM);
45 extern const PROGMEM char *OWProgROM_Status[];
48 /* Return codes for OWFirst()/OWNext() */
51 #define OW_NOPRESENCE -1
52 #define OW_NOMODULES 0
55 /* General 1 wire commands */
56 #define OW_OVRDRV_SKIP_CMD 0x3c
57 #define OW_SEARCH_ALRM_CMD 0xec
58 #define OW_SEARCH_ROM_CMD 0xf0
59 #define OW_READ_ROM_CMD 0x33
60 #define OW_MATCH_ROM_CMD 0x55
61 #define OW_SKIP_ROM_CMD 0xcc
64 #define OW_CONVERTT_CMD 0x44
65 #define OW_RD_SCR_CMD 0xbe
66 #define OW_WR_SCR_CMD 0x4e
67 #define OW_CPY_SCR_CMD 0x48
68 #define OW_RECALL_CMD 0xb8
69 #define OW_RD_PSU_CMD 0xb4
72 #define OW_READ_MEMORY 0xf0
73 #define OW_READ_STATUS 0xaa
74 #define OW_GEN_CRC 0xc3
75 #define OW_WRITE_MEMORY 0x0f
76 #define OW_WRITE_STATUS 0x55
79 #define OW_FAMILY_ROM 0x09
80 #define OW_FAMILY_TEMP 0x10
82 /* Return codes for OWGetTemp */
83 /* XXX: make bigger otherwise we can't handle stuff below -10C */
84 #define OW_TEMP_BADVAL -1000
85 #define OW_TEMP_WRONG_FAM -1000
86 #define OW_TEMP_CRC_ERR -1001
87 #define OW_TEMP_NO_ROM -1002
89 /* Helpers for OWGetTemp's number system */
90 #define GETWHOLE(x) ((x) / 100)
91 #define GETFRAC(x) abs((x) - (GETWHOLE(x) * 100))