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Adding support for hardware (DS2482) based OWI bus manager
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| @@ -1,24 +1,32 @@ | ||
| # Arduino-OWI | ||
| The OWI library has been developed to support the implementation of | ||
| 1-wire device drivers. The library includes an example device driver | ||
| and a bus scanner. | ||
| 1-wire bus managers and device drivers. The library includes a GPIO | ||
| based software and DS2482 based hardware bus manager, and device | ||
| driver for DS18B20. | ||
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| Version: 1.5 | ||
| The examples directory contains device search, bus scanner, | ||
| thermometer alarm search, and example sketches for DS18B20, DS1990A | ||
| and DS2482. | ||
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| Version: 1.6 | ||
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| ## Classes | ||
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| * [Abstract One-Wire Bus Manager and Device Interface, OWI](./src/OWI.h) | ||
| * [Software One-Wire Interface, Software::OWI](./src/Software/OWI.h) | ||
| * [Software One-Wire Bus Manager, GPIO, Software::OWI](./src/Software/OWI.h) | ||
| * [Hardware One-Wire Bus Manager, DS2482, Hardware::OWI](./src/Hardware/OWI.h) | ||
| * [Programmable Resolution 1-Wire Digital Thermometer, DS18B20](./src/Driver/DS18B20.h) | ||
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| ## Example Sketches | ||
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| * [DS18B20](./examples/DS18B20) | ||
| * [DS1990A](./examples/DS1990A) | ||
| * [DS2482](./examples/DS2482) | ||
| * [Alarm](./examples/Alarm) | ||
| * [Scanner](./examples/Scanner) | ||
| * [Search](./examples/Search) | ||
| * [Alarm](./examples/Alarm) | ||
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| ## Dependencies | ||
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| * [Arduino-GPIO](https://github.com/mikaelpatel/Arduino-GPIO) | ||
| * [Arduino-TWI](https://github.com/mikaelpatel/Arduino-TWI) |
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| @@ -0,0 +1,122 @@ | ||
| #include "GPIO.h" | ||
| #include "OWI.h" | ||
| #include "TWI.h" | ||
| #include "Hardware/OWI.h" | ||
| #include <util/crc16.h> | ||
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| #define USE_SOFTWARE_TWI | ||
| #if defined(USE_SOFTWARE_TWI) | ||
| #include "Software/TWI.h" | ||
| Software::TWI<BOARD::D18,BOARD::D19> twi; | ||
| #else | ||
| #include "Hardware/TWI.h" | ||
| Hardware::TWI twi; | ||
| #endif | ||
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| Hardware::OWI owi(twi); | ||
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| // DS18B20 Commands | ||
| enum { | ||
| CONVERT_T = 0x44, | ||
| READ_SCRATCHPAD = 0xbe | ||
| }; | ||
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| // DS18B20 Scratchpad Memory | ||
| struct scratchpad_t { | ||
| int16_t temperature; | ||
| int8_t high_trigger; | ||
| int8_t low_trigger; | ||
| uint8_t configuration; | ||
| uint8_t reserved[3]; | ||
| uint8_t crc; | ||
| }; | ||
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| #define TRACE(expr) \ | ||
| do { \ | ||
| Serial.print(#expr "="); \ | ||
| Serial.println(expr); \ | ||
| } while (0) | ||
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| void setup() | ||
| { | ||
| Serial.begin(57600); | ||
| while (!Serial); | ||
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| TRACE(owi.device_reset()); | ||
| TRACE(owi.device_config()); | ||
| TRACE(owi.set_read_pointer(owi.READ_DATA_REGISTER)); | ||
| TRACE(owi.set_read_pointer(owi.CONFIGURATION_REGISTER)); | ||
| TRACE(owi.set_read_pointer(owi.CHANNEL_SELECTION_REGISTER)); | ||
| TRACE(owi.set_read_pointer(owi.STATUS_REGISTER)); | ||
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| uint8_t rom[owi.ROM_MAX] = { 0 }; | ||
| uint8_t crc = 0; | ||
| TRACE(owi.reset()); | ||
| Serial.print(F("rom=")); | ||
| owi.write(owi.READ_ROM); | ||
| for (size_t i = 0; i < sizeof(rom); i++) { | ||
| rom[i] = owi.read(8); | ||
| if (rom[i] < 0x10) Serial.print(0); | ||
| Serial.print(rom[i], HEX); | ||
| crc = _crc_ibutton_update(crc, rom[i]); | ||
| } | ||
| Serial.print(F(", crc=")); | ||
| Serial.println(crc); | ||
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| uint8_t value = 0; | ||
| uint8_t bits = 0; | ||
| uint8_t ix = 0; | ||
| uint8_t res = 0; | ||
| uint8_t dir = 0; | ||
| bool id; | ||
| bool nid; | ||
| crc = 0; | ||
| TRACE(owi.reset()); | ||
| Serial.print(F("rom=")); | ||
| owi.write(owi.SEARCH_ROM); | ||
| do { | ||
| res = owi.triplet(dir); | ||
| id = (res & 1) != 0; | ||
| nid = (res & 2) != 0; | ||
| value = (value >> 1); | ||
| if (dir) value |= 0x80; | ||
| bits += 1; | ||
| if (bits == CHARBITS) { | ||
| rom[ix] = value; | ||
| if (rom[ix] < 0x10) Serial.print(0); | ||
| Serial.print(rom[ix], HEX); | ||
| crc = _crc_ibutton_update(crc, rom[ix]); | ||
| ix += 1; | ||
| bits = 0; | ||
| value = 0; | ||
| } | ||
| } while (id != nid); | ||
| Serial.print(F(", crc=")); | ||
| Serial.println(crc); | ||
| } | ||
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| void loop() | ||
| { | ||
| owi.reset(); | ||
| owi.write(owi.SKIP_ROM); | ||
| owi.write(CONVERT_T); | ||
| delay(750); | ||
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| owi.reset(); | ||
| owi.write(owi.SKIP_ROM); | ||
| owi.write(READ_SCRATCHPAD); | ||
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| scratchpad_t scratchpad; | ||
| uint8_t* p = (uint8_t*) &scratchpad; | ||
| uint8_t crc = 0; | ||
| for (size_t i = 0; i < sizeof(scratchpad); i++) { | ||
| p[i] = owi.read(); | ||
| crc = _crc_ibutton_update(crc, p[i]); | ||
| } | ||
| if (crc == 0) { | ||
| float temperature = scratchpad.temperature * 0.0625; | ||
| TRACE(temperature); | ||
| } else | ||
| TRACE(crc); | ||
| delay(2000); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,9 +1,9 @@ | ||
| name=Arduino-OWI | ||
| version=1.5 | ||
| version=1.6 | ||
| author=Mikael Patel | ||
| maintainer=Mikael Patel <[email protected]> | ||
| sentence=One-Wire Interface (OWI) library for Arduino. | ||
| paragraph=The OWI library has been developed to support the implementation of 1-wire device drivers. Includes abstract OWI bus manager class, GPIO based Software::OWI bus manager and device driver for DS18B20. | ||
| paragraph=The OWI library has been developed to support the implementation of 1-wire device drivers. Includes abstract OWI bus manager class, GPIO based Software::OWI bus manager, DS2482 based Hardware::OWI bus manager, and device driver for DS18B20. | ||
| category=Communication | ||
| url=https://github.com/mikaelpatel/Arduino-OWI | ||
| architectures=avr,sam |
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