Petras Saduikis
Now supports DS18B20 and DS18S20 Maxim/Dallas one-wire thermometer devices. Also supports DS18S20 in 9, 10, 11, and 12 bit resolution modes. 'Use Address' mode now checks if the correct device type is present, and informs the user which device to use. Correct temperature conversion times now used in non-parasitic mode. The device should be placed at least 6 inches (15 cm) from the mbed board in order to accurately read ambient temperature.
OneWireDefs.h@0:01a6a40578c9, 2010-01-03 (annotated)
- Committer:
- snatch59
- Date:
- Sun Jan 03 11:57:31 2010 +0000
- Revision:
- 0:01a6a40578c9
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| snatch59 | 0:01a6a40578c9 | 1 | /* |
| snatch59 | 0:01a6a40578c9 | 2 | * OneWireCRC. This is a port to mbed of Jim Studt's Adruino One Wire |
| snatch59 | 0:01a6a40578c9 | 3 | * library. |
| snatch59 | 0:01a6a40578c9 | 4 | * |
| snatch59 | 0:01a6a40578c9 | 5 | * Copyright (C) <2009> Petras Saduikis <petras@petras.co.uk> |
| snatch59 | 0:01a6a40578c9 | 6 | * |
| snatch59 | 0:01a6a40578c9 | 7 | * This file is part of OneWireCRC. |
| snatch59 | 0:01a6a40578c9 | 8 | * |
| snatch59 | 0:01a6a40578c9 | 9 | * OneWireCRC is free software: you can redistribute it and/or modify |
| snatch59 | 0:01a6a40578c9 | 10 | * it under the terms of the GNU General Public License as published by |
| snatch59 | 0:01a6a40578c9 | 11 | * the Free Software Foundation, either version 3 of the License, or |
| snatch59 | 0:01a6a40578c9 | 12 | * (at your option) any later version. |
| snatch59 | 0:01a6a40578c9 | 13 | * |
| snatch59 | 0:01a6a40578c9 | 14 | * OneWireCRC is distributed in the hope that it will be useful, |
| snatch59 | 0:01a6a40578c9 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| snatch59 | 0:01a6a40578c9 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| snatch59 | 0:01a6a40578c9 | 17 | * GNU General Public License for more details. |
| snatch59 | 0:01a6a40578c9 | 18 | * |
| snatch59 | 0:01a6a40578c9 | 19 | * You should have received a copy of the GNU General Public License |
| snatch59 | 0:01a6a40578c9 | 20 | * along with OneWireCRC. If not, see <http://www.gnu.org/licenses/>. |
| snatch59 | 0:01a6a40578c9 | 21 | */ |
| snatch59 | 0:01a6a40578c9 | 22 | |
| snatch59 | 0:01a6a40578c9 | 23 | #ifndef SNATCH59_ONEWIREDEFS_H |
| snatch59 | 0:01a6a40578c9 | 24 | #define SNATCH59_ONEWIREDEFS_H |
| snatch59 | 0:01a6a40578c9 | 25 | |
| snatch59 | 0:01a6a40578c9 | 26 | // device ids |
| snatch59 | 0:01a6a40578c9 | 27 | #define DS18B20_ID 0x28 |
| snatch59 | 0:01a6a40578c9 | 28 | #define DS18S20_ID 0x10 |
| snatch59 | 0:01a6a40578c9 | 29 | |
| snatch59 | 0:01a6a40578c9 | 30 | #define ALARM_CONFIG_SIZE 3 |
| snatch59 | 0:01a6a40578c9 | 31 | #define THERMOM_SCRATCHPAD_SIZE 9 |
| snatch59 | 0:01a6a40578c9 | 32 | #define THERMOM_CRC_BYTE 8 |
| snatch59 | 0:01a6a40578c9 | 33 | #define ADDRESS_SIZE 8 |
| snatch59 | 0:01a6a40578c9 | 34 | #define ADDRESS_CRC_BYTE 7 |
| snatch59 | 0:01a6a40578c9 | 35 | |
| snatch59 | 0:01a6a40578c9 | 36 | // One Wire command codes |
| snatch59 | 0:01a6a40578c9 | 37 | #define OVERDRIVE_SKIP 0x3C |
| snatch59 | 0:01a6a40578c9 | 38 | // ROM commands |
| snatch59 | 0:01a6a40578c9 | 39 | #define SEARCH_ROM 0xF0 |
| snatch59 | 0:01a6a40578c9 | 40 | #define READ_ROM 0x33 |
| snatch59 | 0:01a6a40578c9 | 41 | #define MATCH_ROM 0x55 |
| snatch59 | 0:01a6a40578c9 | 42 | #define SKIP_ROM 0xCC |
| snatch59 | 0:01a6a40578c9 | 43 | #define ALARM_SEARCH 0xEC |
| snatch59 | 0:01a6a40578c9 | 44 | // Functions Commnds |
| snatch59 | 0:01a6a40578c9 | 45 | #define CONVERT 0x44 |
| snatch59 | 0:01a6a40578c9 | 46 | #define WRITESCRATCH 0x4E |
| snatch59 | 0:01a6a40578c9 | 47 | #define READSCRATCH 0xBE |
| snatch59 | 0:01a6a40578c9 | 48 | #define COPYSCRATCH 0x48 |
| snatch59 | 0:01a6a40578c9 | 49 | #define RECALLE2 0xB8 |
| snatch59 | 0:01a6a40578c9 | 50 | #define READPOWERSUPPLY 0xB4 |
| snatch59 | 0:01a6a40578c9 | 51 | |
| snatch59 | 0:01a6a40578c9 | 52 | // temperature read resolutions |
| snatch59 | 0:01a6a40578c9 | 53 | enum eResolution {nineBit = 0, tenBit, elevenBit, twelveBit}; |
| snatch59 | 0:01a6a40578c9 | 54 | const int CONVERSION_TIME[] = {94, 188, 375, 750}; // milli-seconds |
| snatch59 | 0:01a6a40578c9 | 55 | |
| snatch59 | 0:01a6a40578c9 | 56 | // DS18B20/DS18S20 related |
| snatch59 | 0:01a6a40578c9 | 57 | #define TEMPERATURE_LSB 0 |
| snatch59 | 0:01a6a40578c9 | 58 | #define TEMPERATURE_MSB 1 |
| snatch59 | 0:01a6a40578c9 | 59 | #define HIGH_ALARM_BYTE 2 |
| snatch59 | 0:01a6a40578c9 | 60 | #define LOW_ALARM_BYTE 3 |
| snatch59 | 0:01a6a40578c9 | 61 | #define CONFIG_REG_BYTE 4 |
| snatch59 | 0:01a6a40578c9 | 62 | #define CONFIG_READ_END 5 |
| snatch59 | 0:01a6a40578c9 | 63 | #define COUNT_REMAIN_BYTE 6 |
| snatch59 | 0:01a6a40578c9 | 64 | #define COUNT_PER_DEG_BYTE 7 |
| snatch59 | 0:01a6a40578c9 | 65 | |
| snatch59 | 0:01a6a40578c9 | 66 | #endif |