Maciej Rajtar
Test 1-wire , working wtih parasite power and few sensors with mixed power supply.
onewire.h@0:1197076b78f4, 2010-05-10 (annotated)
- Committer:
- macraj
- Date:
- Mon May 10 08:14:32 2010 +0000
- Revision:
- 0:1197076b78f4
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| macraj | 0:1197076b78f4 | 1 | typedef unsigned char BYTE; |
| macraj | 0:1197076b78f4 | 2 | |
| macraj | 0:1197076b78f4 | 3 | |
| macraj | 0:1197076b78f4 | 4 | #define MAXSENSORS 8 |
| macraj | 0:1197076b78f4 | 5 | // rom-code size including CRC |
| macraj | 0:1197076b78f4 | 6 | #define OW_ROMCODE_SIZE 8 |
| macraj | 0:1197076b78f4 | 7 | |
| macraj | 0:1197076b78f4 | 8 | |
| macraj | 0:1197076b78f4 | 9 | |
| macraj | 0:1197076b78f4 | 10 | |
| macraj | 0:1197076b78f4 | 11 | BYTE ow_reset(void); |
| macraj | 0:1197076b78f4 | 12 | BYTE ow_rom_search( BYTE diff, BYTE *id ); |
| macraj | 0:1197076b78f4 | 13 | void ow_command( BYTE command, BYTE *id ); |
| macraj | 0:1197076b78f4 | 14 | //void DS18X20_find_sensor(BYTE *diff, BYTE id[]); |
| macraj | 0:1197076b78f4 | 15 | BYTE DS18X20_get_power_status(uint8_t id[]); |
| macraj | 0:1197076b78f4 | 16 | |
| macraj | 0:1197076b78f4 | 17 | extern void DS18X20_show_id_uart( uint8_t *id, size_t n ); |
| macraj | 0:1197076b78f4 | 18 | extern void DS18X20_find_sensor(uint8_t *diff, uint8_t id[]); |
| macraj | 0:1197076b78f4 | 19 | extern uint8_t DS18X20_get_power_status(uint8_t id[]); |
| macraj | 0:1197076b78f4 | 20 | extern uint8_t DS18X20_start_meas( uint8_t with_external, uint8_t id[]); |
| macraj | 0:1197076b78f4 | 21 | extern uint8_t DS18X20_read_meas(uint8_t id[], uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits); |
| macraj | 0:1197076b78f4 | 22 | extern uint8_t DS18X20_read_meas_single(uint8_t familycode, uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits); |
| macraj | 0:1197076b78f4 | 23 | extern uint8_t DS18X20_meas_to_cel( uint8_t fc, uint8_t *sp, uint8_t* subzero, uint8_t* cel, uint8_t* cel_frac_bits); |
| macraj | 0:1197076b78f4 | 24 | extern uint16_t DS18X20_temp_to_decicel(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits); |
| macraj | 0:1197076b78f4 | 25 | extern int8_t DS18X20_temp_cmp(uint8_t subzero1, uint16_t cel1, uint8_t subzero2, uint16_t cel2); |
| macraj | 0:1197076b78f4 | 26 | |
| macraj | 0:1197076b78f4 | 27 | |
| macraj | 0:1197076b78f4 | 28 | extern void ow_parasite_enable(void); |
| macraj | 0:1197076b78f4 | 29 | extern void ow_parasite_disable(void); |
| macraj | 0:1197076b78f4 | 30 | |
| macraj | 0:1197076b78f4 | 31 | #define DEBUG 1 |
| macraj | 0:1197076b78f4 | 32 | |
| macraj | 0:1197076b78f4 | 33 | #define ONEWIRE_PIN p12 |
| macraj | 0:1197076b78f4 | 34 | |
| macraj | 0:1197076b78f4 | 35 | |
| macraj | 0:1197076b78f4 | 36 | #define OW_MATCH_ROM 0x55 |
| macraj | 0:1197076b78f4 | 37 | #define OW_SKIP_ROM 0xCC |
| macraj | 0:1197076b78f4 | 38 | #define OW_SEARCH_ROM 0xF0 |
| macraj | 0:1197076b78f4 | 39 | |
| macraj | 0:1197076b78f4 | 40 | |
| macraj | 0:1197076b78f4 | 41 | #define OW_SHORT_CIRCUIT 0xFF |
| macraj | 0:1197076b78f4 | 42 | #define OW_SEARCH_FIRST 0xFF // start new search |
| macraj | 0:1197076b78f4 | 43 | #define OW_PRESENCE_ERR 0x01 |
| macraj | 0:1197076b78f4 | 44 | #define OW_DATA_ERR 0xFE |
| macraj | 0:1197076b78f4 | 45 | #define OW_LAST_DEVICE 0x00 // last device found |
| macraj | 0:1197076b78f4 | 46 | // 0x01 ... 0x40: continue searching |
| macraj | 0:1197076b78f4 | 47 | |
| macraj | 0:1197076b78f4 | 48 | // rom-code size including CRC |
| macraj | 0:1197076b78f4 | 49 | #define OW_ROMCODE_SIZE 8 |
| macraj | 0:1197076b78f4 | 50 | |
| macraj | 0:1197076b78f4 | 51 | |
| macraj | 0:1197076b78f4 | 52 | #define DS18X20_POWER_PARASITE 0x00 |
| macraj | 0:1197076b78f4 | 53 | #define DS18X20_POWER_EXTERN 0x01 |
| macraj | 0:1197076b78f4 | 54 | |
| macraj | 0:1197076b78f4 | 55 | /* DS18X20 specific values (see datasheet) */ |
| macraj | 0:1197076b78f4 | 56 | #define DS18S20_ID 0x10 |
| macraj | 0:1197076b78f4 | 57 | #define DS18B20_ID 0x28 |
| macraj | 0:1197076b78f4 | 58 | #define DS18X20_CONVERT_T 0x44 |
| macraj | 0:1197076b78f4 | 59 | #define DS18X20_READ 0xBE |
| macraj | 0:1197076b78f4 | 60 | #define DS18X20_WRITE 0x4E |
| macraj | 0:1197076b78f4 | 61 | #define DS18X20_EE_WRITE 0x48 |
| macraj | 0:1197076b78f4 | 62 | #define DS18X20_EE_RECALL 0xB8 |
| macraj | 0:1197076b78f4 | 63 | #define DS18X20_READ_POWER_SUPPLY 0xB4 |
| macraj | 0:1197076b78f4 | 64 | |
| macraj | 0:1197076b78f4 | 65 | #define DS18X20_OK 0x00 |
| macraj | 0:1197076b78f4 | 66 | #define DS18X20_ERROR 0x01 |
| macraj | 0:1197076b78f4 | 67 | #define DS18X20_START_FAIL 0x02 |
| macraj | 0:1197076b78f4 | 68 | #define DS18X20_ERROR_CRC 0x03 |
| macraj | 0:1197076b78f4 | 69 | |
| macraj | 0:1197076b78f4 | 70 | |
| macraj | 0:1197076b78f4 | 71 | #define DS18B20_CONF_REG 4 |
| macraj | 0:1197076b78f4 | 72 | #define DS18B20_9_BIT 0 |
| macraj | 0:1197076b78f4 | 73 | #define DS18B20_10_BIT (1<<5) |
| macraj | 0:1197076b78f4 | 74 | #define DS18B20_11_BIT (1<<6) |
| macraj | 0:1197076b78f4 | 75 | #define DS18B20_12_BIT ((1<<6)|(1<<5)) |
| macraj | 0:1197076b78f4 | 76 | |
| macraj | 0:1197076b78f4 | 77 | // indefined bits in LSB if 18B20 != 12bit |
| macraj | 0:1197076b78f4 | 78 | #define DS18B20_9_BIT_UNDF ((1<<0)|(1<<1)|(1<<2)) |
| macraj | 0:1197076b78f4 | 79 | #define DS18B20_10_BIT_UNDF ((1<<0)|(1<<1)) |
| macraj | 0:1197076b78f4 | 80 | #define DS18B20_11_BIT_UNDF ((1<<0)) |
| macraj | 0:1197076b78f4 | 81 | #define DS18B20_12_BIT_UNDF 0 |
| macraj | 0:1197076b78f4 | 82 | |
| macraj | 0:1197076b78f4 | 83 | // conversion times in ms |
| macraj | 0:1197076b78f4 | 84 | #define DS18B20_TCONV_12BIT 750 |
| macraj | 0:1197076b78f4 | 85 | #define DS18B20_TCONV_11BIT DS18B20_TCONV_12_BIT/2 |
| macraj | 0:1197076b78f4 | 86 | #define DS18B20_TCONV_10BIT DS18B20_TCONV_12_BIT/4 |
| macraj | 0:1197076b78f4 | 87 | #define DS18B20_TCONV_9BIT DS18B20_TCONV_12_BIT/8 |
| macraj | 0:1197076b78f4 | 88 | #define DS18S20_TCONV DS18B20_TCONV_12_BIT |
| macraj | 0:1197076b78f4 | 89 | |
| macraj | 0:1197076b78f4 | 90 | // constant to convert the fraction bits to cel*(10^-4) |
| macraj | 0:1197076b78f4 | 91 | #define DS18X20_FRACCONV 625 |
| macraj | 0:1197076b78f4 | 92 | |
| macraj | 0:1197076b78f4 | 93 | #define DS18X20_SP_SIZE 9 |
| macraj | 0:1197076b78f4 | 94 | |
| macraj | 0:1197076b78f4 | 95 | // DS18X20 EEPROM-Support |
| macraj | 0:1197076b78f4 | 96 | #define DS18X20_WRITE_SCRATCHPAD 0x4E |
| macraj | 0:1197076b78f4 | 97 | #define DS18X20_COPY_SCRATCHPAD 0x48 |
| macraj | 0:1197076b78f4 | 98 | #define DS18X20_RECALL_E2 0xB8 |
| macraj | 0:1197076b78f4 | 99 | #define DS18X20_COPYSP_DELAY 10 /* ms */ |
| macraj | 0:1197076b78f4 | 100 | #define DS18X20_TH_REG 2 |
| macraj | 0:1197076b78f4 | 101 | #define DS18X20_TL_REG 3 |