diff options
Diffstat (limited to 'peripheral/libupm/src/bmp280/bme280.cxx')
| -rw-r--r-- | peripheral/libupm/src/bmp280/bme280.cxx | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/peripheral/libupm/src/bmp280/bme280.cxx b/peripheral/libupm/src/bmp280/bme280.cxx deleted file mode 100644 index e78b8af..0000000 --- a/peripheral/libupm/src/bmp280/bme280.cxx +++ /dev/null @@ -1,174 +0,0 @@ -/* - * Author: Jon Trulson <jtrulson@ics.com> - * Copyright (c) 2016 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 <unistd.h> -#include <iostream> -#include <stdexcept> -#include <string> -#include <math.h> -#include <string.h> - -#include "bme280.hpp" - -using namespace upm; -using namespace std; - -BME280::BME280(int bus, int addr, int cs, uint8_t theChipID) : - BMP280(bus, addr, cs, theChipID) -{ - - m_humidity = 0; - - m_dig_H1 = 0; - m_dig_H2 = 0; - m_dig_H3 = 0; - m_dig_H4 = 0; - m_dig_H5 = 0; - m_dig_H6 = 0; - - // set sleep mode for now - setMeasureMode(MODE_SLEEP); - - // read calibration data - readCalibrationData(); - - // set the default mode to the highest resolution mode - setUsageMode(USAGE_MODE_INDOOR_NAV); -} - -BME280::~BME280() -{ -} - -void BME280::update() -{ - // call the base class method first. This will handle the details - // WRT forced mode so that we can always be sure to read valid data - // regardless of the underlying measurement mode. - - BMP280::update(); - - int32_t hum = 0; - - const int dataLen = 2; - uint8_t data[dataLen]; - memset(data, 0, dataLen); - - int rv; - if ((rv = readRegs(REG_HUMIDITY_MSB, data, dataLen)) != dataLen) - { - throw std::runtime_error(std::string(__FUNCTION__) - + ": readRegs() failed, returned " - + std::to_string(rv)); - } - - // 20 bits unsigned stored in a 32bit signed quanty - - hum = ( (data[0] << 8) | data[1] ); - - m_humidity = float(bme280_compensate_H_int32(hum)); - m_humidity /= 1024.0; -} - -void BME280::readCalibrationData() -{ - m_dig_H1 = readReg(REG_CALIB_DIG_H1); - - const int calibLen = 7; - uint8_t calibData[calibLen]; - readRegs(REG_CALIB_DIG_H2_LSB, calibData, calibLen); - - m_dig_H2 = int16_t((calibData[1] << 8) | calibData[0]); - - m_dig_H3 = calibData[2]; - - m_dig_H4 = int16_t( (calibData[3] << 4) | - (calibData[4] & 0x0f) ); - - m_dig_H5 = int16_t( ((calibData[4] & 0xf0) >> 4) | - (calibData[5] << 4) ); - - m_dig_H6 = int8_t(calibData[6]); - -# if 0 - cerr << std::dec - << "H1: " << (int)m_dig_H1 - << " H2: " << (int)m_dig_H2 - << " H3: " << (int)m_dig_H3 - << " H4: " << (int)m_dig_H4 - << " H5: " << (int)m_dig_H5 - << " H6: " << (int)m_dig_H5 - << endl; -# endif // 0 - - // The BMP280 ctor will call it's version of readCalibrationData -} - -float BME280::getHumidity() -{ - return m_humidity; -} - -void BME280::setOversampleRateHumidity(OSRS_H_T rate) -{ - uint8_t reg = readReg(REG_CTRL_HUM); - - reg &= ~(_CTRL_HUM_OSRS_H_MASK << _CTRL_HUM_OSRS_H_SHIFT); - reg |= (rate << _CTRL_HUM_OSRS_H_SHIFT); - - writeReg(REG_CTRL_HUM, reg); -} - - -void BME280::setUsageMode(USAGE_MODE_T mode) -{ - // Here, we just set the default humidity oversample to 1 and then - // call the base method. - - m_humidity = 0; - - // set sleep mode first - setMeasureMode(MODE_SLEEP); - - setOversampleRateHumidity(OSRS_H_OVERSAMPLING_1); - BMP280::setUsageMode(mode); -} - -// This function comes from the BMP180 datasheet, section 4.2.3 - -// Returns humidity in %RH as unsigned 32 bit integer in Q22.10 format -// (22 integer and 10 fractional bits). Output value of “47445” -// represents 47445/1024 = 46.333 %RH -uint32_t BME280::bme280_compensate_H_int32(int32_t adc_H) -{ - int32_t v_x1_u32r; - v_x1_u32r = (m_t_fine - ((int32_t)76800)); - v_x1_u32r = (((((adc_H << 14) - (((int32_t)m_dig_H4) << 20) - (((int32_t)m_dig_H5) * v_x1_u32r)) + - ((int32_t)16384)) >> 15) * (((((((v_x1_u32r * ((int32_t)m_dig_H6)) >> 10) * (((v_x1_u32r * ((int32_t)m_dig_H3)) >> 11) + ((int32_t)32768))) >> 10) + ((int32_t)2097152)) * ((int32_t)m_dig_H2) + 8192) >> 14)); - v_x1_u32r = (v_x1_u32r - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7) * ((int32_t)m_dig_H1)) >> 4)); - v_x1_u32r = (v_x1_u32r < 0 ? 0 : v_x1_u32r); - v_x1_u32r = (v_x1_u32r > 419430400 ? 419430400 : v_x1_u32r); - return (int32_t)(v_x1_u32r>>12); -} - |