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/*******************************************************************************
 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
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 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
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 * 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,
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 */

#include "MAX14720.h"

//******************************************************************************
MAX14720::MAX14720(PinName sda, PinName scl, int slaveAddress) :
    slaveAddress(slaveAddress)
{
    i2c = new I2C(sda,scl);
    isOwner = true;
    clkDivEn = false;
    clkDivSet = 0;
    boostISet = BOOST_ISET_100mA;
    boostMillivolts = 3300;
    boostEn = BOOST_DISABLED;
    boostEMI = false;
    boostInd = false;
    boostHysOff = false;
    boostPasDsc = false;
    boostActDsc = false;
    buckMd = BUCK_BURST;
    buckFst = false;
    buckISet = BUCK_ISET_300mA;
    buckCfg = false;
    buckInd = false;
    buckHysOff = true;
    buckMinOT = true;
    buckInteg = true;
    buckPasDsc = false;
    buckActDsc = false;
    buckFScl = false;
}
//******************************************************************************
MAX14720::MAX14720(I2C *i2c, int slaveAddress) :
    slaveAddress(slaveAddress)
{
    this->i2c = i2c;
    isOwner = false;
    clkDivEn = false;
    clkDivSet = 0;
    boostISet = BOOST_ISET_100mA;
    boostMillivolts = 3300;
    boostEn = BOOST_DISABLED;
    boostEMI = false;
    boostInd = false;
    boostHysOff = false;
    boostPasDsc = false;
    boostActDsc = false;
    buckMd = BUCK_BURST;
    buckFst = false;
    buckISet = BUCK_ISET_300mA;
    buckCfg = false;
    buckInd = false;
    buckHysOff = true;
    buckMinOT = true;
    buckInteg = true;
    buckPasDsc = false;
    buckActDsc = false;
    buckFScl = false;
}
//******************************************************************************
MAX14720::~MAX14720()
{
    if (isOwner == true) {
        delete i2c;
    }
}

//******************************************************************************
int MAX14720::boostSetMode(boostEn_t mode)
{
    int result;
    char data;
    boostEn = mode;
    data = (boostEn << 3) | (boostEMI << 1) | (boostInd);
    result = writeReg(REG_BOOST_CFG, data);
    if (result == MAX14720_ERROR) return result;
    return 0;
}

//******************************************************************************
int MAX14720::boostSetVoltage(int mV)
{
    int result;
    char data;
    if ((MAX14720_BOOST_MIN_MV <= mV)&&(mV <= MAX14720_BOOST_MAX_MV)) {
        boostMillivolts = mV;
        data = (mV - MAX14720_BOOST_MIN_MV) / MAX14720_BOOST_STEP_MV;
    } else {
        return MAX14720_ERROR;
    }
    if (boostEn == BOOST_ENABLED) {
        result = writeReg(REG_BOOST_CFG, 0x00);
    }
    if (result == MAX14720_ERROR) return result;
    result = writeReg(REG_BOOST_VSET, data);
    if (result == MAX14720_ERROR) return result;
    if (boostEn == BOOST_ENABLED) {
        data = (boostEn << 3) | (boostEMI << 1) | (boostInd);
        result = writeReg(REG_BOOST_CFG, data);
    }
    if (result == MAX14720_ERROR) return result;
    return 0;
}

//******************************************************************************
int MAX14720::init()
{
    int result;
    char data;
    data = (clkDivEn << 7) | (clkDivSet);
    result = writeReg(REG_BOOST_CDIV, data);
    if (result == MAX14720_ERROR) return result;
    data = (boostISet);
    result = writeReg(REG_BOOST_ISET, data);
    if (result == MAX14720_ERROR) return result;
    if ((MAX14720_BOOST_MIN_MV <= boostMillivolts)&&(boostMillivolts <= MAX14720_BOOST_MAX_MV)) {
        data = (boostMillivolts - MAX14720_BOOST_MIN_MV) / MAX14720_BOOST_STEP_MV;
    } else {
        return MAX14720_ERROR;
    }
    result = writeReg(REG_BOOST_VSET, data);
    if (result == MAX14720_ERROR) return result;
    data = (buckMd << 1) | (buckFst);
    result = writeReg(REG_BUCK_CFG, data);
    if (result == MAX14720_ERROR) return result;
    data = (boostHysOff << 7) | (boostPasDsc << 6) | (boostActDsc << 5) | (buckPasDsc << 2) | (buckActDsc << 1) | (buckFScl);
    result = writeReg(REG_BBB_EXTRA, data);
    if (result == MAX14720_ERROR) return result;
    // Write Boost Enable Register Last
    data = (boostEn << 3) | (boostEMI << 1) | (boostInd);
    result = writeReg(REG_BOOST_CFG, data);
    if (result == MAX14720_ERROR) return result;
    return 0;
}

//******************************************************************************
int MAX14720::monSet(monCfg_t monCfg)
{
    int result;
    result = writeReg(REG_MON_CFG, monCfg);
    if (result == MAX14720_ERROR) return result;
    return 0;
}

//******************************************************************************
int MAX14720::shutdown()
{
    int result;
    result = writeReg(REG_PWR_OFF, 0xB2);
    if (result == MAX14720_ERROR) return result;
    return 0;
}


//******************************************************************************
int MAX14720::writeReg(registers_t reg,  char value)
{
    int result;
    char cmdData[2] = { (char)reg, value };
    result = i2c->write(slaveAddress, cmdData, 2);
    if (result != 0) return MAX14720_ERROR;
    return MAX14720_NO_ERROR;
}

//******************************************************************************
int MAX14720::readReg(registers_t reg, char *value)
{
    int result;
    char cmdData[1] = { (char)reg };

    result = i2c->write(slaveAddress, cmdData, 1);
    if (result != 0) return MAX14720_ERROR;
    result = i2c->read(slaveAddress, value, 1);
    if (result != 0) return MAX14720_ERROR;
    return MAX14720_NO_ERROR;
}