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.
main.cpp@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/OneWireThermometer demo. |
| snatch59 | 0:01a6a40578c9 | 3 | * |
| snatch59 | 0:01a6a40578c9 | 4 | * Copyright (C) <2009> Petras Saduikis <petras@petras.co.uk> |
| snatch59 | 0:01a6a40578c9 | 5 | * |
| snatch59 | 0:01a6a40578c9 | 6 | * This file is part of OneWireCRC/OneWireThermometer. |
| snatch59 | 0:01a6a40578c9 | 7 | * |
| snatch59 | 0:01a6a40578c9 | 8 | * OneWireCRC/OneWireThermometer is free software: you can redistribute it and/or modify |
| snatch59 | 0:01a6a40578c9 | 9 | * it under the terms of the GNU General Public License as published by |
| snatch59 | 0:01a6a40578c9 | 10 | * the Free Software Foundation, either version 3 of the License, or |
| snatch59 | 0:01a6a40578c9 | 11 | * (at your option) any later version. |
| snatch59 | 0:01a6a40578c9 | 12 | * |
| snatch59 | 0:01a6a40578c9 | 13 | * OneWireCRC/OneWireThermometer is distributed in the hope that it will be useful, |
| snatch59 | 0:01a6a40578c9 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| snatch59 | 0:01a6a40578c9 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| snatch59 | 0:01a6a40578c9 | 16 | * GNU General Public License for more details. |
| snatch59 | 0:01a6a40578c9 | 17 | * |
| snatch59 | 0:01a6a40578c9 | 18 | * You should have received a copy of the GNU General Public License |
| snatch59 | 0:01a6a40578c9 | 19 | * along with OneWireCRC/OneWireThermometer0. If not, see <http://www.gnu.org/licenses/>. |
| snatch59 | 0:01a6a40578c9 | 20 | */ |
| snatch59 | 0:01a6a40578c9 | 21 | |
| snatch59 | 0:01a6a40578c9 | 22 | //////////////////////////////////////////////////////////////////// |
| snatch59 | 0:01a6a40578c9 | 23 | // Test code to read temperature from a Maxim DS18B20 or DS18S20 |
| snatch59 | 0:01a6a40578c9 | 24 | // 1-wire device |
| snatch59 | 0:01a6a40578c9 | 25 | //////////////////////////////////////////////////////////////////// |
| snatch59 | 0:01a6a40578c9 | 26 | |
| snatch59 | 0:01a6a40578c9 | 27 | #include <mbed.h> |
| snatch59 | 0:01a6a40578c9 | 28 | #include "DS18S20.h" |
| snatch59 | 0:01a6a40578c9 | 29 | #include "DS18B20.h" |
| snatch59 | 0:01a6a40578c9 | 30 | #include "OneWireDefs.h" |
| snatch59 | 0:01a6a40578c9 | 31 | |
| snatch59 | 0:01a6a40578c9 | 32 | //#define THERMOMETER DS18S20 |
| snatch59 | 0:01a6a40578c9 | 33 | #define THERMOMETER DS18B20 |
| snatch59 | 0:01a6a40578c9 | 34 | |
| snatch59 | 0:01a6a40578c9 | 35 | int main() |
| snatch59 | 0:01a6a40578c9 | 36 | { |
| snatch59 | 0:01a6a40578c9 | 37 | // device( crcOn, useAddress, parasitic, mbed pin ) |
| snatch59 | 0:01a6a40578c9 | 38 | THERMOMETER device(true, true, false, p25); |
| snatch59 | 0:01a6a40578c9 | 39 | |
| snatch59 | 0:01a6a40578c9 | 40 | while (!device.initialize()); // keep calling until it works |
| snatch59 | 0:01a6a40578c9 | 41 | |
| snatch59 | 0:01a6a40578c9 | 42 | while (true) |
| snatch59 | 0:01a6a40578c9 | 43 | { |
| snatch59 | 0:01a6a40578c9 | 44 | // changing the resolutions only affects the DS18B20. The DS18S20 is fixed. |
| snatch59 | 0:01a6a40578c9 | 45 | device.setResolution(nineBit); |
| snatch59 | 0:01a6a40578c9 | 46 | device.readTemperature(); |
| snatch59 | 0:01a6a40578c9 | 47 | wait(2); |
| snatch59 | 0:01a6a40578c9 | 48 | device.setResolution(tenBit); |
| snatch59 | 0:01a6a40578c9 | 49 | device.readTemperature(); |
| snatch59 | 0:01a6a40578c9 | 50 | wait(2); |
| snatch59 | 0:01a6a40578c9 | 51 | device.setResolution(elevenBit); |
| snatch59 | 0:01a6a40578c9 | 52 | device.readTemperature(); |
| snatch59 | 0:01a6a40578c9 | 53 | wait(2); |
| snatch59 | 0:01a6a40578c9 | 54 | device.setResolution(twelveBit); |
| snatch59 | 0:01a6a40578c9 | 55 | device.readTemperature(); |
| snatch59 | 0:01a6a40578c9 | 56 | wait(2); |
| snatch59 | 0:01a6a40578c9 | 57 | } |
| snatch59 | 0:01a6a40578c9 | 58 | |
| snatch59 | 0:01a6a40578c9 | 59 | return EXIT_SUCCESS; |
| snatch59 | 0:01a6a40578c9 | 60 | } |