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/*
* Author: Marc Graham <marc@m2ag.net>
* Copyright (c) 2015 Intel Corporation.
*
* 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 THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include "ads1015.hpp"
using namespace upm;
void
ADS1015::setSPS(ADSSAMPLERATE rate){
updateConfigRegister((m_config_reg & ~ADS1X15_DR_MASK) | rate);
}
ADS1015::ADS1015(int bus, uint8_t address, float vref) : ADS1X15(bus, address) {
m_name = "ADS1015";
m_conversionDelay = ADS1015_CONVERSIONDELAY;
m_bitShift = 4;
ADS1X15::getCurrentConfig();
if (vref < 0.0 || vref > 6.144)
UPM_THROW("vref out of range");
else if (vref > 4.096)
setGain(GAIN_TWOTHIRDS);
else if (vref > 2.048)
setGain(GAIN_ONE);
else if (vref > 1.024)
setGain(GAIN_TWO);
else if (vref > 0.512)
setGain(GAIN_FOUR);
else if (vref > 0.256)
setGain(GAIN_EIGHT);
else
setGain(GAIN_SIXTEEN);
}
ADS1015::~ADS1015(){};
const char*
ADS1015::getModuleName() {
return m_name.c_str();
}
unsigned int
ADS1015::getNumInputs() {
return 4;
}
unsigned int
ADS1015::getResolutionInBits() {
return 12;
}
uint16_t
ADS1015::getRawValue(unsigned int input) {
ADS1X15::ADSMUXMODE mode = getMuxMode(input);
updateConfigRegister((m_config_reg & ~ADS1X15_MUX_MASK) | mode, true);
usleep(m_conversionDelay);
uint16_t value = i2c->readWordReg(ADS1X15_REG_POINTER_CONVERT);
value = value >> m_bitShift;
return swapWord(value);
}
float
ADS1015::getVoltage(unsigned int input) {
ADSMUXMODE mode = getMuxMode(input);
return getSample(mode);
}
//Private functions
float
ADS1015::getMultiplier(void){
float multi = 0.0;
switch((ADSGAIN)m_config_reg & ADS1X15_PGA_MASK){
case GAIN_TWOTHIRDS:
multi = 0.003;
break;
case GAIN_ONE:
multi = 0.002;
break;
case GAIN_TWO:
multi = 0.001;
break;
case GAIN_FOUR:
multi = 0.0005;
break;
case GAIN_EIGHT:
multi = 0.00025;
break;
case GAIN_SIXTEEN:
multi = 0.000125;
break;
default:
multi = 0.001;
break;
}
return multi;
}
void
ADS1015::setDelay(){
switch((int)ADS1X15::getSPS()){
case 0:
m_conversionDelay = 8000;
break;
case 32:
m_conversionDelay = 4000;
break;
case 64:
m_conversionDelay = 3000;
break;
case 96:
m_conversionDelay = 1100;
break;
case 128:
m_conversionDelay = 700;
break;
case 160:
m_conversionDelay = 500;
break;
case 192:
m_conversionDelay = 400;
break;
default:
m_conversionDelay = 8000;
break;
}
}
ADS1X15::ADSMUXMODE
ADS1015::getMuxMode(unsigned int input) {
ADS1X15::ADSMUXMODE mode;
switch (input) {
case 0:
return SINGLE_0;
case 1:
return SINGLE_1;
case 2:
return SINGLE_2;
case 3:
return SINGLE_3;
default:
UPM_THROW("Invalid input");
}
}
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