diff options
Diffstat (limited to 'peripheral/libupm/src/ads1x15/ads1x15.cxx')
| -rw-r--r-- | peripheral/libupm/src/ads1x15/ads1x15.cxx | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/peripheral/libupm/src/ads1x15/ads1x15.cxx b/peripheral/libupm/src/ads1x15/ads1x15.cxx deleted file mode 100644 index 4a1ea9d..0000000 --- a/peripheral/libupm/src/ads1x15/ads1x15.cxx +++ /dev/null @@ -1,187 +0,0 @@ -/* - * 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 "ads1x15.h" - -#include <unistd.h> - -using namespace upm; - -ADS1X15::ADS1X15(int bus, uint8_t address){ - - if(!(i2c = new mraa::I2c(bus))){ - throw std::invalid_argument(std::string(__FUNCTION__) +": I2c.init() failed"); - return; - } - - if((i2c->address(address) != mraa::SUCCESS)){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.address() failed"); - return; - } - - if(i2c->frequency( mraa::I2C_FAST) != mraa::SUCCESS){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.frequency(I2C_FAST) failed"); - return; - } - //Will be reset by sub class. - m_bitShift = 0; - m_conversionDelay = .001; - m_config_reg = 0x0000; -} - -ADS1X15::~ADS1X15(){} - -float -ADS1X15::getSample(ADSMUXMODE mode){ - updateConfigRegister((m_config_reg & ~ADS1X15_MUX_MASK) | mode, true); - usleep(m_conversionDelay); - return getLastSample(); -} - -float -ADS1X15::getLastSample(int reg){ - uint16_t value = i2c->readWordReg(reg); - bool neg = false; - value = swapWord(value); - if(value & 0x8000){ - neg = true; - value = ~value; - } - if(m_name == "ADS1015") value = value >> m_bitShift; - if(neg) return 0.0 - value * getMultiplier(); - else return value * getMultiplier(); -} - -void -ADS1X15::setGain(ADSGAIN gain){ - updateConfigRegister((m_config_reg & ~ADS1X15_PGA_MASK) | gain); -} - -void -ADS1X15::setSPS(ADSSAMPLERATE rate){ - updateConfigRegister((m_config_reg & ~ADS1X15_DR_MASK) | rate); -} - -void -ADS1X15::setCompMode(bool mode){ - if(mode) updateConfigRegister((m_config_reg & ~ADS1X15_CMODE_MASK)); - else updateConfigRegister((m_config_reg & ~ADS1X15_CMODE_MASK) | ADS1X15_CMODE_WINDOW); -} - -void -ADS1X15::setCompPol(bool mode){ - if(!mode) updateConfigRegister((m_config_reg & ~ADS1X15_CPOL_MASK)); - else updateConfigRegister((m_config_reg & ~ADS1X15_CPOL_MASK) | ADS1X15_CPOL_ACTVHI); -} - -void -ADS1X15::setCompLatch(bool mode){ - if(mode) updateConfigRegister((m_config_reg & ~ADS1X15_CLAT_MASK)); - else updateConfigRegister((m_config_reg & ~ADS1X15_CLAT_MASK) | ADS1X15_CLAT_LATCH); -} - -void -ADS1X15::setCompQue(ADSCOMP mode){ - updateConfigRegister((m_config_reg & ~ADS1X15_CQUE_MASK) | mode); -} - -void -ADS1X15::setContinuous(bool mode){ - if(mode) updateConfigRegister((m_config_reg & ~ADS1X15_MODE_MASK)); - else updateConfigRegister((m_config_reg & ~ADS1X15_MODE_MASK) | ADS1X15_MODE_SINGLE); -} - -float -ADS1X15::getThresh(ADSTHRESH reg){ - if( THRESH_HIGH && THRESH_LOW) return getLastSample(reg); - else return 0.0; -} - -void -ADS1X15::setThresh(ADSTHRESH reg, float value){ - uint16_t set_value; - switch((int)reg){ - case 4: //set conversion_rdy operation - if(i2c->writeWordReg(ADS1X15_REG_POINTER_LOWTHRESH, 0x0000) != mraa::SUCCESS){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.write() failed"); - return; - } - if(i2c->writeWordReg(ADS1X15_REG_POINTER_HITHRESH, 0x0080) != mraa::SUCCESS){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.write() failed"); - return; - } - break; - case 2: - case 3: - set_value = value / getMultiplier(); - set_value = set_value << m_bitShift; - if(i2c->writeWordReg(reg, swapWord(set_value)) != mraa::SUCCESS){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.write() failed"); - return; - } - break; - case 5: //set default - default: - if(i2c->writeWordReg(ADS1X15_REG_POINTER_LOWTHRESH, 0x0080) != mraa::SUCCESS){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.write() failed"); - return; - } - if(i2c->writeWordReg(ADS1X15_REG_POINTER_HITHRESH, 0xF07F) != mraa::SUCCESS){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.write() failed"); - return; - } - break; - } -} - - -//Private functions -void -ADS1X15::getCurrentConfig(){ - m_config_reg = i2c->readWordReg(ADS1X15_REG_POINTER_CONFIG); - m_config_reg = swapWord(m_config_reg); - setDelay(); -} - -void -ADS1X15::updateConfigRegister(uint16_t update, bool read){ - uint16_t temp = update; - //Mask out read bit if we are just updating the configuration. - if(!read) temp = update & 0x7FFF; - if(i2c->writeWordReg(ADS1X15_REG_POINTER_CONFIG, swapWord(temp)) != mraa::SUCCESS){ - throw std::invalid_argument(std::string(__FUNCTION__) + ": I2c.write() failed"); - return; - } - //If we update the configuration re-set the in memory copy. - if(!read) getCurrentConfig(); -} - -uint16_t -ADS1X15::swapWord(uint16_t value){ - uint16_t res = value; - return ((res & 0xFF) << 8) | ((res >> 8 ) & 0xFF); -} - - |