wiolink grove driver for ds18b20

grove_ds18b20.cpp

/*
 * grove_ds18b20.cpp
 *
 * Copyright (c) 2012 seeed technology inc.
 * Website    :  www.seeed.cc
 * Author     :  Kai
 *
 * The MIT License (MIT)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "grove_ds18b20.h"
#include <OneWire.h>
#include <DallasTemperature.h>

#ifndef ENABLE_DEBUG_ON_UART1
#define ENABLE_DEBUG_ON_UART1      1
#endif

#define ONE_WIRE_BUS 12  // DS18B20 on Digital Port 1 = pin 12 look at http://www.seeedstudio.com/wiki/Wio_Link

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);

GroveDs18b20::GroveDs18b20(int pin)
{

#ifdef ENABLE_DEBUG_ON_UART1
    Serial1.println("Hello ds18b20!!!");    
    byte i;
    byte addr[8];

    if ( !oneWire.search(addr)) {
      Serial1.print("no addresses found\n");
      oneWire.reset_search();
      return;
    }
 
    Serial1.print("R=");
    for( i = 0; i < 8; i++) {
      Serial1.print(addr[i], HEX);
      Serial1.print(" ");
    }
 
    if ( OneWire::crc8( addr, 7) != addr[7]) {
      Serial1.print("bad CRC!\n");
      return;
    }
 
    if ( addr[0] == 0x10) {
      Serial1.print("device is DS18S20 family\n");
    }
    else if ( addr[0] == 0x28) {
      Serial1.print("device is DS18B20 family\n");
    }
    else {
      Serial1.print("device not recognized : 0x");
      Serial1.println(addr[0],HEX);
      return;
    }
#endif

    DS18B20.begin();/* Inizialisieren der Dallas Temperature library */

}

/* read count of devices */
bool GroveDs18b20::read_device_count(uint8_t *count)
{
    *count = DS18B20.getDeviceCount();

    return true;
}

/* read temperature of first device in Celsius */
bool GroveDs18b20::read_temperature_C(uint8_t index, float *temperature)
{
    
    DS18B20.requestTemperatures(); // Temp abfragen

    if (index < 1 || index > DS18B20.getDeviceCount())
    {
        error_desc = "there is no device with this device number";
        return false;
    }

    *temperature = DS18B20.getTempCByIndex(index - 1);

    return true;
}

/* read temperature of first device in Fahrenheit */
bool GroveDs18b20::read_temperature_F(uint8_t index, float *temperature)
{
    
    DS18B20.requestTemperatures(); // Temp abfragen
    
    if (index < 1 || index > DS18B20.getDeviceCount())
    {
        error_desc = "there is no device with this device number";
        return false;
    }

    *temperature = DS18B20.getTempFByIndex(index - 1);
    return true;
}

grove_ds18b20.h

/*
 * grove_ds18b20.h
 *
 * Copyright (c) 2012 seeed technology inc.
 * Website    : www.seeed.cc
 * Author     : Kai 
 *
 * The MIT License (MIT)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */


#ifndef __GROVE_DS18B20_H__
#define __GROVE_DS18B20_H__

#include "suli2.h"

//GROVE_NAME        "Grove_ds18b20"
//SKU               0497dd7c-2faf-4ccb-900d-9a8f3b099fed 
//IF_TYPE           GPIO
//IMAGE_URL         http://i.imgur.com/McTQZjy.jpg 


class GroveDs18b20
{
public:
    GroveDs18b20(int pin);
    
    /**
     * get the number of devices at the bus 
     * 
     * @param device_count - count of devices  
     * 
     * @return bool 
     */
    bool read_device_count(uint8_t *device_count);

    /**
     * read the temperature of device with number device_index 
     * 
     * @param device_index - number of device to read from (1~n) 
     * @param celsius_degree - unit: Celsius degree 
     * 
     * @return bool 
     */
    bool read_temperature_C(uint8_t device_index, float *celsius_degree);

    /**
     * read the temperature of device with number device_index 
     * 
     * @param device_count - number of device to read from (1~n) 
     * @param fahrenheit_degree - unit: Fahrenheit degree 
     * 
     * @return bool 
     */
    bool read_temperature_F(uint8_t device_index, float *fahrenheit_degree);

    char *get_last_error() { return error_desc; };

private:
    char *error_desc;

};


#endif