File content as of revision 25:93287f99d225:

/*******************************************************************************
* Copyright (C) 2019 Maxim Integrated Products, Inc., All Rights Reserved.
*
* 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 MAXIM INTEGRATED 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.
*
* Except as contained in this notice, the name of Maxim Integrated
* Products, Inc. shall not be used except as stated in the Maxim Integrated
* Products, Inc. Branding Policy.
*
* The mere transfer of this software does not imply any licenses
* of trade secrets, proprietary technology, copyrights, patents,
* trademarks, maskwork rights, or any other form of intellectual
* property whatsoever. Maxim Integrated Products, Inc. retains all
* ownership rights.
*******************************************************************************
* @file ds7505_cpp.h
*******************************************************************************
*/
#ifndef DS7505_CPP_H
#define DS7505_CPP_H
#include "mbed.h"


/**
 * @brief Digital thermometer, thermostat, temperature sensor.
 * @version 1.0000.0000
 *
 * @details The DS7505 low-voltage (1.7V to 3.7V) digital thermometer 
 * and thermostat provides 9-, 10-, 11-, or 12-bit digital
 * temperature readings over a -55°C to +125°C range with
 * ±0.5°C accuracy over a -0°C to +70°C range. The 9-bit resolution mode 
 * is software compatible with the LM75.
 * Available in 8-pin SO (1.27 mm pitch) or uMAX (0.65 mm pitch) packages.
 * Operating temperature: -55°C to +125°C (-67°F to +257°).
 * VDD: 1.7V to 3.7V.
 *
 * @code 
 * #include "mbed.h"
 * #include "max32630fthr.h"
 * #include "ds7505.h"
 * #include "USBSerial.h"
 * MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3); 
 * I2C i2cBus(P3_4, P3_5);
 * int main()
 * {
 *     float temperature;
 *     DigitalOut rLED(LED1, LED_OFF);
 *     DigitalOut gLED(LED2, LED_OFF);
 *     DigitalOut bLED(LED3, LED_OFF);
 *     gLED = LED_ON;
 *     DS7505 temp_sensor(i2cBus, DS7505_I2C_SLAVE_ADR_00);
 *     i2cBus.frequency(400000);
 *        temperature =
 *            temp_sensor.read_reg_as_temperature(DS7505_REG_TEMPERATURE);
 *        printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
 *            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
 * }
 * @endcode
 */

class DS7505
{
    public:

    /**********************************************************//**
     * @brief Constructor for DS7505 Class.  
     * 
     * @details Allows user to use existing I2C object
     *
     * On Entry:
     *     @param[in] i2c_bus - pointer to existing I2C object
     *     @param[in] i2c_adrs - 7-bit slave address of DS7505
     *
     * On Exit:
     *
     * @return None
     **************************************************************/
    DS7505(I2C &i2c_bus, uint8_t slave_address);
 
    /**********************************************************//**
     * @brief Default destructor for DS7505 Class.  
     *
     * @details Destroys I2C object if owner 
     *
     * On Entry:
     *
     * On Exit:
     *
     * @return None
     **************************************************************/
    ~DS7505();

    /**
     * @brief  Read register of device at slave address
     * @param[out] value - Read data on success
     * @return 0 on success, negative number on failure
     */
    int read_cfg_reg(uint8_t *value);

    /**
     * @brief  Read register of device at slave address
     * @param[out] value - Read data on success
     * @param reg - Register address
     * @return 0 on success, negative number on failure
     */
    int read_reg16(int16_t *value, char reg);

    /** 
     * @brief Reads the temperature registers
     * @param reg - the address of the temperature register
     * @return temperature in degrees Celsius
     */
    float read_reg_as_temperature(uint8_t reg);

    /** 
     * @brief Writes to the configuration register
     * @param cfg - configurate word
     * @return 0 on success, negative number on failure
     */
     int write_cfg_reg(uint8_t cfg);

    /** 
     * @brief Writes to the THYST register
     * @param temperature - the temperature in Celsius degrees
     * @return 0 on success, negative number on failure
     */
     int write_trip_low_thyst(float temperature);

    /** 
     * @brief Writes to the TOS register
     * @param temperature - the temperature in Celsius degrees
     * @return 0 on success, negative number on failure
     */
     int write_trip_high_tos(float temperature);

    /** 
     * @brief Converts Celsius degrees to Fahrenheit
     * @param temp_c - the temperature in Celsius degrees
     * @return temperature in Celsius degrees
     */
     float celsius_to_fahrenheit(float temp_c);

protected: 
    /** 
     * @brief Write a value to a register
     * @param value - value to write to the register
     * @param reg - register address
     * @return 0 on success, negative number on failure
     */
    int write_reg16(int16_t value, char reg);

private:
    /** @var m_i2c
     * @brief I2C object
     */
    I2C &m_i2c;
    /** @var m_write_address, m_read_address
     * @brief I2C address
     */
    uint8_t m_write_address, m_read_address;

};

#endif/* DS7505_CPP_H */