MAX14720.cpp

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00033 
00034 #include "MAX14720.h"
00035 
00036 //******************************************************************************
00037 MAX14720::MAX14720(PinName sda, PinName scl, int slaveAddress) : 
00038           slaveAddress(slaveAddress) {
00039   i2c = new I2C(sda, scl);
00040   isOwner = true;
00041   clkDivEn = false;
00042   clkDivSet = 0;
00043   boostISet = BOOST_ISET_100mA;
00044   boostMillivolts = 3300;
00045   boostEn = BOOST_DISABLED;
00046   boostEMI = false;
00047   boostInd = false;
00048   boostHysOff = false;
00049   boostPasDsc = false;
00050   boostActDsc = false;
00051   buckMd = BUCK_BURST;
00052   buckFst = false;
00053   buckISet = BUCK_ISET_300mA;
00054   buckCfg = false;
00055   buckInd = false;
00056   buckHysOff = true;
00057   buckMinOT = true;
00058   buckInteg = true;
00059   buckPasDsc = false;
00060   buckActDsc = false;
00061   buckFScl = false;
00062 }
00063 //******************************************************************************
00064 MAX14720::MAX14720(I2C *i2c, int slaveAddress) : slaveAddress(slaveAddress) {
00065   this->i2c = i2c;
00066   isOwner = false;
00067   clkDivEn = false;
00068   clkDivSet = 0;
00069   boostISet = BOOST_ISET_100mA;
00070   boostMillivolts = 3300;
00071   boostEn = BOOST_DISABLED;
00072   boostEMI = false;
00073   boostInd = false;
00074   boostHysOff = false;
00075   boostPasDsc = false;
00076   boostActDsc = false;
00077   buckMd = BUCK_BURST;
00078   buckFst = false;
00079   buckISet = BUCK_ISET_300mA;
00080   buckCfg = false;
00081   buckInd = false;
00082   buckHysOff = true;
00083   buckMinOT = true;
00084   buckInteg = true;
00085   buckPasDsc = false;
00086   buckActDsc = false;
00087   buckFScl = false;
00088 }
00089 //******************************************************************************
00090 MAX14720::~MAX14720() {
00091   if (isOwner == true) {
00092     delete i2c;
00093   }
00094 }
00095 
00096 //******************************************************************************
00097 int MAX14720::boostSetMode(boostEn_t mode) {
00098   int result;
00099   char data;
00100   boostEn = mode;
00101   data = (boostEn << 3) | (boostEMI << 1) | (boostInd);
00102   result = writeReg(REG_BOOST_CFG, data);
00103   if (result == MAX14720_ERROR) return result;
00104   return 0;
00105 }
00106 
00107 //******************************************************************************
00108 int MAX14720::boostSetVoltage(int mV) {
00109   int result;
00110   char data;
00111   if ((MAX14720_BOOST_MIN_MV <= mV) && (mV <= MAX14720_BOOST_MAX_MV)) {
00112     boostMillivolts = mV;
00113     data = (mV - MAX14720_BOOST_MIN_MV) / MAX14720_BOOST_STEP_MV;
00114   } else {
00115     return MAX14720_ERROR;
00116   }
00117   if (boostEn == BOOST_ENABLED) {
00118     result = writeReg(REG_BOOST_CFG, 0x00);
00119   }
00120   if (result == MAX14720_ERROR) return result;
00121   result = writeReg(REG_BOOST_VSET, data);
00122   if (result == MAX14720_ERROR) return result;
00123   if (boostEn == BOOST_ENABLED) {
00124     data = (boostEn << 3) | (boostEMI << 1) | (boostInd);
00125     result = writeReg(REG_BOOST_CFG, data);
00126   }
00127   if (result == MAX14720_ERROR) return result;
00128   return 0;
00129 }
00130 
00131 //******************************************************************************
00132 int MAX14720::init() {
00133   int result;
00134   char data;
00135   data = (clkDivEn << 7) | (clkDivSet);
00136   result = writeReg(REG_BOOST_CDIV, data);
00137   if (result == MAX14720_ERROR) return result;
00138   data = (boostISet);
00139   result = writeReg(REG_BOOST_ISET, data);
00140   if (result == MAX14720_ERROR)return result;
00141   if ((MAX14720_BOOST_MIN_MV <= boostMillivolts) &&
00142       (boostMillivolts <= MAX14720_BOOST_MAX_MV)) {
00143     data = (boostMillivolts - MAX14720_BOOST_MIN_MV) / MAX14720_BOOST_STEP_MV;
00144   } else {
00145     return MAX14720_ERROR;
00146   }
00147   result = writeReg(REG_BOOST_VSET, data);
00148   if (result == MAX14720_ERROR) return result;
00149   data = (buckMd << 1) | (buckFst);
00150   result = writeReg(REG_BUCK_CFG, data);
00151   if (result == MAX14720_ERROR) return result;
00152   data = (boostHysOff << 7) | (boostPasDsc << 6) | (boostActDsc << 5) |
00153          (buckPasDsc << 2) | (buckActDsc << 1) | (buckFScl);
00154   result = writeReg(REG_BBB_EXTRA, data);
00155   if (result == MAX14720_ERROR) return result;
00156   // Write Boost Enable Register Last
00157   data = (boostEn << 3) | (boostEMI << 1) | (boostInd);
00158   result = writeReg(REG_BOOST_CFG, data);
00159   if (result == MAX14720_ERROR) return result;
00160   return 0;
00161 }
00162 
00163 //******************************************************************************
00164 int MAX14720::monSet(monCfg_t monCfg) {
00165   int result;
00166   result = writeReg(REG_MON_CFG, monCfg);
00167   if (result == MAX14720_ERROR) return result;
00168   return 0;
00169 }
00170 
00171 //******************************************************************************
00172 int MAX14720::shutdown() {
00173   int result;
00174   result = writeReg(REG_PWR_OFF, 0xB2);
00175   if (result == MAX14720_ERROR) return result;
00176   return 0;
00177 }
00178 
00179 //******************************************************************************
00180 int MAX14720::writeReg(registers_t reg, char value) {
00181   int result;
00182   char cmdData[2] = {(char)reg, value};
00183   result = i2c->write(slaveAddress, cmdData, 2);
00184   if (result != 0) return MAX14720_ERROR;
00185   return MAX14720_NO_ERROR;
00186 }
00187 
00188 //******************************************************************************
00189 int MAX14720::readReg(registers_t reg, char *value) {
00190   int result;
00191   char cmdData[1] = {(char)reg};
00192 
00193   result = i2c->write(slaveAddress, cmdData, 1);
00194   if (result != 0) return MAX14720_ERROR;
00195   result = i2c->read(slaveAddress, value, 1);
00196   if (result != 0) return MAX14720_ERROR;
00197   return MAX14720_NO_ERROR;
00198 }