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/*------------------------------------------------------------------------------
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-- This file is a part of the libuc, microcontroler library
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-- Copyright (C) 2012, Alexis Jeandet
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------
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-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@member.fsf.org
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-------------------------------------------------------------------------------*/
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#include <ina226.h>
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#include <stdio.h>
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#include <stddef.h>
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int ina226open(INA226_t *dev, i2c_t i2cdev, uint16_t config, uint8_t A0, uint8_t A1, uint32_t shuntmOhm, uint32_t CurrentRangeuAmp)
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{
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if(dev != NULL)
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{
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dev->i2cdev=i2cdev;
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dev->devAddress = INA226_I2C_ADDRESS | (A0 & 1) | ((A1<<2) & 5);
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printf("dev->devAddress = %x\n\r",dev->devAddress);
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dev->shuntmOhm = shuntmOhm;
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dev->CurrentRangeuAmp = CurrentRangeuAmp;
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ina226setReg(dev,INA226_Configuration_Reg,0x8000);
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ina226setReg(dev,INA226_Configuration_Reg,config);
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return ina226calibrate(dev,shuntmOhm,CurrentRangeuAmp);
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}
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return -1;
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}
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uint16_t ina226getID(INA226_t* dev)
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{
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if(dev != NULL)
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{
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uint16_t id=ina226getReg(dev,INA226_Die_ID_Reg);
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return id;
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}
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return -1;
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}
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int ina226calibrate(INA226_t* dev,uint32_t shuntmOhm, uint32_t CurrentRangeuAmp)
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{
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dev->shuntmOhm = shuntmOhm;
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dev->CurrentRangeuAmp = CurrentRangeuAmp;
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// uint32_t CAL= (uint32_t)(5210000/(shuntmOhm*(CurrentRangeuAmp>>15)));
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float CAL=(5210000.0/((float)shuntmOhm*((float)CurrentRangeuAmp/32768.0)));
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return ina226setReg(dev,INA226_Calibration_Reg,(uint16_t)CAL);
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}
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uint32_t ina226getBusVoltage(INA226_t *dev)
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{
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uint32_t busVoltage= ina226getReg(dev,INA226_Bus_Voltage_Reg);
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busVoltage*= 1250;
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return busVoltage;
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}
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uint32_t ina226getPower(INA226_t *dev)
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{
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uint32_t power= ina226getReg(dev,INA226_Power_Reg);
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power*= ((dev->CurrentRangeuAmp>>15)*25);
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return power;
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}
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int32_t ina226getCurrent(INA226_t *dev)
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{
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int32_t current= ina226getReg(dev,INA226_Current_Reg);
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current<<=16;
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current>>=16;
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current = current*(dev->CurrentRangeuAmp>>15);
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return current;
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}
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uint16_t ina226getReg(INA226_t* dev,char reg)
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{
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if(dev != NULL)
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{
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char DATA[2];
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DATA[0]=reg;
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i2cwrite(dev->i2cdev,dev->devAddress,DATA,1);
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i2cread(dev->i2cdev,dev->devAddress,DATA,2);
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uint16_t val=DATA[0];
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val=(val<<8)+DATA[1];
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return val;
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}
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return -1;
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}
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int ina226setReg(INA226_t* dev,char reg,int16_t value)
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{
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if(dev != NULL)
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{
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char DATA[3];
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DATA[0]=INA226_Calibration_Reg;
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DATA[1]=(char)(0xff & (value>>8));
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DATA[2]=(char)(0xff & value);
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if(3==i2cwrite(dev->i2cdev,dev->devAddress,DATA,3))return 1;
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}
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return -1;
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}
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