File content as of revision 11:72363a906638:

/*******************************************************************************
* Copyright (C) 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.
*******************************************************************************
*/
 
 
#include "MAX30208.h"


//******************************************************************************
MAX30208::MAX30208(I2C &i2c, uint8_t slaveAddress): 
m_i2c(i2c), m_writeAddress(slaveAddress << 1), 
m_readAddress((slaveAddress << 1) | 1)
{
}


//******************************************************************************
MAX30208::~MAX30208(void) {
  //empty block
}

//******************************************************************************
    int32_t MAX30208::writeInterruptRegister(Configuration_InterruptEnable config) {
        return(writeRegister(MAX30208::Interrupt_Enable,(config.all << 8),2));
    }
    
//******************************************************************************
    int32_t MAX30208::readInterruptRegister(Configuration_InterruptEnable &config) {
        uint16_t data;
        int32_t status;
        status = readRegister(MAX30208::Interrupt_Enable, data, 1);
        if(status == 0) {
            config.all = data;
        }
        return(status);
    }

//****************************************************************************** 
    int32_t MAX30208::readStatus(uint16_t &value) {
        return(readRegister(MAX30208::Status,value, 1));
    }
    
//******************************************************************************
    int32_t MAX30208::readWritePointer(uint16_t &value) {
        return (readRegister(MAX30208::FIFO_Write_Pointer,value, 1));
    }
    
//******************************************************************************
    int32_t MAX30208::readReadPointer(uint16_t &value) {
        return (readRegister(MAX30208::FIFO_Read_Pointer,value,1));
    }
    
//******************************************************************************
    int32_t MAX30208::writeReadPointer(uint8_t config) {
        return(writeRegister(MAX30208::FIFO_Read_Pointer, (config << 8),2));
    }
    
//******************************************************************************
    int32_t MAX30208::readOverflow(uint16_t &value) {
        return(readRegister(MAX30208::FIFO_Overflow_Counter,value, 1));
    }
    
//******************************************************************************
    int32_t MAX30208::readDataCounter(uint16_t &value) {
        return(readRegister(MAX30208::FIFO_Data_Counter,value, 1));  
    }
    
//******************************************************************************
   int32_t MAX30208::readData(uint16_t &value) {
        return(readRegister(MAX30208::FIFO_Data,value, 2));
    }
    
//******************************************************************************
   int32_t MAX30208::takeDataMeasurment() {
        return(writeRegister(MAX30208::Temp_Sensor_Setup,0xFF00,2));
    }
    
//******************************************************************************
    int32_t MAX30208::readFIFOConfig1(uint16_t &value) {
        return (readRegister(MAX30208::FIFO_Config1,value, 1));
    }
    
//******************************************************************************
    int32_t MAX30208::writeFIFOConfig1(uint8_t config) { 
        return(writeRegister(MAX30208::FIFO_Config1,(config << 8),2));
    }
    
//******************************************************************************
    int32_t MAX30208::readFIFOConfig2(Configuration_FIFOConfig2 &config) {
        uint16_t data;
        int32_t status;
        status = readRegister(MAX30208::FIFO_Config2, data, 1);
        if(status == 0){
            config.all = data;
        }
        return(status);
    }
    
//******************************************************************************
    int32_t MAX30208::writeFIFOConfig2(Configuration_FIFOConfig2 config) {
        return(writeRegister(MAX30208::FIFO_Config2,(config.all << 8),2));
    }
    
//******************************************************************************
    int32_t MAX30208::resetDevice() {
        return(writeRegister(MAX30208::System_Control,(0x01 << 8),2));
    }

//******************************************************************************
   int32_t MAX30208::readAlarmHigh(uint16_t &temp) {
        return readRegister(MAX30208::Alarm_High_MSB,temp, 2);
    }
       
//******************************************************************************
    int32_t MAX30208::writeAlarmHigh(uint16_t temp) {
        return(writeRegister(MAX30208::Alarm_High_MSB, temp, 3));
    }
    
//******************************************************************************
    int32_t MAX30208::readAlarmLow(uint16_t &value) {
        return (readRegister(MAX30208::Alarm_Low_MSB,value, 2));
    }
    
//******************************************************************************
   int32_t MAX30208::writeAlarmLow(uint16_t temp) {
        return(writeRegister(MAX30208::Alarm_Low_MSB,temp,3));
    }
    
//******************************************************************************
    int32_t MAX30208::readGPIOSetup(Configuration_GPIOSetup &config) {
        uint16_t data;
        int32_t status;
        status = readRegister(MAX30208::GPIO_Setup, data, 1);
        if(status == 0) {
            config.all = data;
        }
        return(status);
    }

//******************************************************************************
    int32_t MAX30208::writeGPIOSetup(Configuration_GPIOSetup config) {
        return(writeRegister(MAX30208::GPIO_Setup,(config.all << 8),2));
    }
    
//******************************************************************************
    int32_t MAX30208::readGPIOControl(Configuration_GPIOControl &config) {
        uint16_t data;
        int32_t status;
        status = readRegister(MAX30208::GPIO_Control, data, 1);
        if(status == 0) {
            config.all = data;
        }
        return(status);
    }

//******************************************************************************
    int32_t MAX30208::writeGPIOControl(Configuration_GPIOControl config) {
        return(writeRegister(MAX30208::GPIO_Control,(config.all << 8),2));
    }
    
//******************************************************************************
    float MAX30208::toCelsius(uint16_t rawTemp) {
        float celsius;
        celsius = 0.005*rawTemp;
        return celsius;    
    }
    
//******************************************************************************
    float MAX30208::toFahrenheit(float temperatureC) {
         float temperatureF;
         temperatureF = (temperatureC * 1.8F) + 32.0f;
         return temperatureF;   
    }
    
//******************************************************************************
int32_t MAX30208::writeRegister(Registers_e reg, uint16_t value, int bytesWritten) {
  
  int32_t ret;
  
  uint8_t hi = ((value >> 8) & 0xFF);
  uint8_t lo = (value & 0xFF);
  char val[3] = {reg, hi, lo};
  
  ret = m_i2c.write(m_writeAddress, val, bytesWritten, false); 
  return (ret);
}

//******************************************************************************
int32_t MAX30208::readRegister(Registers_e reg, uint16_t &value, int bytesRead) {
    
    int32_t ret;
    char cmdata[1] = {reg};
    char dataRead[2];
        
    ret = m_i2c.write(m_readAddress,cmdata,1,true);
    if (ret == 0) {
        ret = m_i2c.read(m_readAddress,dataRead,bytesRead,false);
        if(ret == 0 && bytesRead == 2){
            value = ((dataRead[0]<<8)+ dataRead[1]);
        }
        else if (ret == 0 && bytesRead == 1){
            value = dataRead[0];    
        }
    }
    return(ret);
}