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ledPWMthresholder.cc
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ledPWMthresholder.cc
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/*
* Thresholding tool for setting PWM values for all available LEDs such that
* their brightness is almost equal (Peaks are almost at same height)
*/
#include <iostream>
#include <fstream>
#include <serial.h>
#include <math.h>
#include <boost/program_options.hpp>
#include <data.h>
#include <pr655.h>
#include "lpm.h"
#include "cfg.h"
int main(int argc, char **argv) {
namespace po = boost::program_options;
std::string arduinoDevFile;
std::string pr655DevFile;
po::options_description opts("IRIS LED PWM Thresholder");
opts.add_options()
("help", "Call --help for help")
("arduino", po::value<std::string>(&arduinoDevFile), "Device file for Aurdrino")
("pr655", po::value<std::string>(&pr655DevFile), "Device file for pr655 Spectrometer");
po::variables_map vm;
po::store(po::command_line_parser(argc, argv).options(opts).run(), vm);
po::notify(vm);
if(vm.count("help")) {
std::cout << opts << std::endl << std::endl;
return 0;
} else if(vm.count("arduino") && vm.count("pr655")) {
std::cout << "Opening Arduino Device File" << std::endl;
device::lpm lpm = device::lpm::open(arduinoDevFile); //connect to arduino
std::cout << "Opening pr655 Device File" << std::endl;
device::pr655 meter = device::pr655::open(pr655DevFile); //connect to pr655
/*
* build the <LED Pin, Wavelength> map from YAML Config file
*/
const lpm::cfg store = lpm::cfg::default_cfg();
const std::map<uint8_t, uint16_t> ledMap = store.lpm_leds();
std::cout << "Traversing the map; generated from LED PIN & Wavelength YAML Config File: " << std::endl;
for(auto elem : ledMap) {
std::cout << "pin: " << unsigned(elem.first) << " -- Wavelength: " << unsigned(elem.second) << "nm \n";
}
std::cout << std::endl << "Starting Thresholding Process for all available LEDs..." << std::endl << std::endl;
std::map<uint16_t, spectral_data> spectrumData;
std::map<uint16_t, uint16_t> led_pin_pwm;
float threshold = 0.000025;
bool thresholdFlag = false;
int pwmDecrementStepSize = 500;
uint16_t previousPWMVal = 4096; //initially 4096
while(!thresholdFlag) {
for(auto elem : ledMap) {
std::cout << "$: Turning on " << unsigned(elem.second) << "nm LED on pin " << unsigned(elem.first) << std::endl;
bool currentLedThresholdFlag = false;
while(!currentLedThresholdFlag) {
std::string pwmCmd = "pwm " + std::to_string(unsigned(elem.first)) + "," + std::to_string(previousPWMVal) + "";
std::cout << "executing: " << pwmCmd << std::endl;
/*
* Turn on LED
*/
lpm.led(elem.first, previousPWMVal);
std::cout << "---------------------------------------" << std::endl;
std::cout << "From arduino after turning LED on: " << std::endl;
lpm.receiveArduinoOutput(); //print stream from arduino
std::cout << "---------------------------------------" << std::endl << std::endl << std::endl ;
/*
* Time delay of 1 sec
*/
usleep(1000000);
/*
* Measure the Spectrum
*/
std::cout << "$: Measuring the spectrum" << std::endl;
std::string prefix = "# ";
try {
bool could_start = meter.start();
if (! could_start) {
std::cerr << "Could not start remote mode" << std::endl;
meter.stop();
return -1;
}
meter.units(true);
meter.measure();
device::pr655::cfg config = meter.config();
spectral_data data = meter.spectral();
std::vector<float> spectraValues;
for (size_t i = 0; i < data.data.size(); i++) {
std::vector<float>::iterator it = spectraValues.begin();
spectraValues.insert(it, data.data[i]);
}
float maxima = *std::max_element(spectraValues.begin(), spectraValues.end());
std::cout << "Peak at: " << maxima << std::endl;
float diff = fabs(maxima - threshold);
std::cout << "Difference in Threshold and Peak: " << diff << std::endl;
if( diff < 0.000005 || previousPWMVal < 1000) { // it's ok now if diff is less than specified value or PWM gets lower than 1000
currentLedThresholdFlag = true;
led_pin_pwm.insert(std::pair<uint16_t, uint16_t>(elem.second, previousPWMVal));
spectrumData.insert( std::pair<uint16_t , spectral_data>(elem.second, data) );
previousPWMVal = 4096;
} else {
previousPWMVal = previousPWMVal - pwmDecrementStepSize;
}
spectrumData.insert( std::pair<uint16_t , spectral_data>(elem.second, data) );
} catch (const std::exception &e) {
std::cerr << e.what() << std::endl;
}
meter.stop();
}
/*
* Reset the LED
*/
std::cout << "$: Resetting the LED" << std::endl;
lpm.reset();
std::cout << "---------------------------------------" << std::endl;
std::cout << "From arduino after resetting" << std::endl;
lpm.receiveArduinoOutput(); //print stream from arduino
std::cout << "---------------------------------------" << std::endl << std::endl << std::endl ;
/*
* Time delay of 1 sec
*/
usleep(1000000);
}
thresholdFlag = true; //all pwm values are good now
}
std::ofstream pwmout("data/pwm.txt");
pwmout << "pwm:" << std::endl;
for(auto elem : led_pin_pwm) {
pwmout << " " << unsigned(elem.first) << " : " << unsigned(elem.second) << std::endl;
}
pwmout.close();
std::ofstream fout("spectral.txt");
fout << "LED,";
for(auto elem : spectrumData) {
spectral_data temp = elem.second;
for (size_t i = 0; i < temp.data.size(); i++) {
fout << temp.wl_start + i * temp.wl_step ;
if(i != (temp.data.size() -1) ) {
fout << ",";
}
}
break; // just to print top header line in dump file
}
fout << std::endl;
for(auto elem : spectrumData) {
fout << unsigned(elem.first) << ",";
spectral_data temp = elem.second;
for (size_t i = 0; i < temp.data.size(); i++) {
fout << temp.data[i] ;
if(i != (temp.data.size() -1) ) {
fout << ",";
}
}
fout << std::endl;
}
fout.close();
} else {
std::cout << "Not Enough Arguments. call --help for help" << std::endl;
}
return 0;
}