File content as of revision 12:05435282f899:

/* Copyright (c) <2016> <MultiTech Systems>, MIT License
 *
 * 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.
 */

/**
 * @file    SensorHandler.cpp
 * @brief   Reads on board sensors... acceleration, pressure, light and temperture.
 * @author  Leon Lindenfelser
 * @version 1.0
 *
 */

#include "SensorHandler.h"

SensorHandler::SensorHandler(I2C& i2c)
    : _getSensorThread(&SensorHandler::startSensorThread, this)
    , _accelerometer(i2c, MMA845x::SA0_VSS)
    , _barometricSensor(i2c)
    , _lightSensor(i2c)
{
    SensorHandler::initSensors();
    _getSensorThread.signal_set(START_THREAD);
    return;
}

SensorHandler::~SensorHandler(void)
{
    _getSensorThread.terminate();
}     

void SensorHandler::initSensors(){
    //  Setup the Accelerometer for 8g range, 14 bit resolution, Noise reduction off, sample rate 1.56 Hz
    //  normal oversample mode, High pass filter off
    _accelerometer.setCommonParameters(MMA845x::RANGE_8g,MMA845x::RES_MAX,MMA845x::LN_OFF,
    						   MMA845x::DR_6_25,MMA845x::OS_NORMAL,MMA845x::HPF_OFF );
	 
    // Setup the Barometric sensor for post processed Ambient pressure, 4 samples per data acquisition.
    //and a sample taken every second when in active mode
    _barometricSensor.setParameters(MPL3115A2::DATA_NORMAL, MPL3115A2::DM_BAROMETER, MPL3115A2::OR_16,
    					MPL3115A2::AT_1);
    // Setup the Ambient Light Sensor for continuous Ambient Light Sensing, 16 bit resolution,
    // and 16000 lux range
    _lightSensor.setMode(ISL29011::ALS_CONT);
    _lightSensor.setResolution(ISL29011::ADC_16BIT);
    _lightSensor.setRange(ISL29011::RNG_16000);
	 
    // Set the accelerometer for active mode
    _accelerometer.activeMode();
	 
    // Clear the min-max registers in the Barometric Sensor
    _barometricSensor.clearMinMaxRegs();
}

void SensorHandler::startSensorThread(void const *p)
{
    SensorHandler *instance = (SensorHandler*)p;
    instance->readSensors();
}

void SensorHandler::readSensors()
{
    uint8_t result;
    Timer timer;
    timer.start();
    
    _getSensorThread.signal_wait(START_THREAD);
    while(1){
        // Test Accelerometer XYZ data ready bit to see if acquisition complete
        timer.reset();
        do {
            osDelay(20);			 // allows other threads to process
            result = _accelerometer.getStatus();
            if((result & MMA845x::XYZDR) != 0 ){
                // Retrieve accelerometer data
                _mutex.lock();        
                _accelerometerData = _accelerometer.getXYZ();
                _mutex.unlock();
            }
        } while (((result & MMA845x::XYZDR) == 0 ) && (timer.read_ms() < 1000));

	 
        // Trigger a Pressure reading
        _barometricSensor.setParameters(MPL3115A2::DATA_NORMAL, MPL3115A2::DM_BAROMETER, MPL3115A2::OR_16,
									MPL3115A2::AT_1);
        _barometricSensor.triggerOneShot();
	 
        // Test barometer device status to see if acquisition is complete
        timer.reset();
        do {
            osDelay(20);			 // allows other threads to process
            result = _barometricSensor.getStatus();
            if((result & MPL3115A2::PTDR) != 0){
                // Retrieve barometric pressure
                _mutex.lock();        
                _pressure = _barometricSensor.getBaroData() >> 12; // convert 32 bit signed to 20 bit unsigned value
                _mutex.unlock();                
            }
        } while (((result & MPL3115A2::PTDR) == 0) && (timer.read_ms() < 100));

        
        // Trigger an Altitude reading
        _barometricSensor.setParameters(MPL3115A2::DATA_NORMAL, MPL3115A2::DM_ALTIMETER, MPL3115A2::OR_16,
        					MPL3115A2::AT_1);
        _barometricSensor.triggerOneShot();
	 
        // Test barometer device status to see if acquisition is complete
        timer.reset();
        do {
            osDelay(20);			 // allows other threads to process
            result = _barometricSensor.getStatus();
            if((result & MPL3115A2::PTDR) != 0 ){
                // Retrieve temperature and altitude.
                _mutex.lock();
                _barometerData = _barometricSensor.getAllData(false);
                _mutex.unlock();                 
            }
        } while (((result & MPL3115A2::PTDR) == 0 ) && (timer.read_ms() < 100));

        // Retrieve light level
        _mutex.lock();
        _light = _lightSensor.getData();
        _mutex.unlock();
        osDelay(100);             // allows other threads to process
    }
}

MMA845x_DATA SensorHandler::getAcceleration(){
    MMA845x_DATA data;
    _mutex.lock();
    data = _accelerometerData;
    _mutex.unlock();
    return data;
}

float SensorHandler::getLight(){
    float light;
    uint16_t whole;
    _mutex.lock();
    whole = _light;
    _mutex.unlock();
    light = whole * 24 % 100;
    light /= 100;
    light = light + (whole * 24 / 100);       // 16000 lux full scale .24 lux per bit
    return light; 
}

uint16_t SensorHandler::getLightRaw(){
    uint16_t light;
    _mutex.lock();
    light = _light;
    _mutex.unlock();
    return light; 
}

float SensorHandler::getPressure(){
    float pressure;
    uint32_t whole;
    _mutex.lock();
    whole = _pressure;
    _mutex.unlock();
    pressure = (whole & 3) * .25;
    pressure = pressure + (whole >> 2);
    return pressure;    
}

uint32_t SensorHandler::getPressureRaw(){
    uint32_t pressure;
    _mutex.lock();
    pressure = _pressure;
    _mutex.unlock();
    return pressure;    
}

float SensorHandler::getTemp(Scale scale){
    float temperature;
    uint16_t whole;
    _mutex.lock();
    whole = _barometerData._temp;    
    _mutex.unlock();
    temperature = whole & 0x0f;
    temperature *= .0625;
    temperature += (whole >> 4);
    if(scale == FAHRENHEIT){
        temperature = temperature * 1.8 + 32;
    }
    return temperature;
}

float SensorHandler::getAltitude(){
    float altitude;
    uint32_t whole;
    _mutex.lock();
    whole = _barometerData._baro;    
    _mutex.unlock();
    whole /= 4096;
    altitude = (whole & 0x0f) * .0625;
    whole /= 16;
    altitude += whole;
    return altitude;
}

MPL3115A2_DATA SensorHandler::getBarometer(){
    MPL3115A2_DATA data;
    _mutex.lock();
    data = _barometerData;
    _mutex.unlock();
    return data;
}