led-cpp/led.cpp

/*led.cpp*/
#include"led.h"
#include<iostream>
#include<fstream>
#include<string>
#include<sstream>

#define LED_PATH "/sys/class/leds/beaglebone:green:usr"

LED::LED(int number){
  this->number = number;
  std::ostringstream s;
  s << LED_PATH << number; // LED number to the Path
  path = std::string(s.str()); // convert to string
}

void LED::writeLED(std::string filename, std::string value){
  std::ofstream fs;
  fs.open((path + filename).c_str());
  fs << value;
  fs.close();
}

void LED::removeTrigger(){
  writeLED("/trigger", "none");
}

void LED::turnOn(){
  std::cout << "Turning LED" << number << "on" << std::endl;
  removeTrigger();
  writeLED("/brightness", "1");
}

void LED::turnOff(){
  std::cout << "Turning LED" << number << "off" << std::endl;
  removeTrigger();
  writeLED("/brightness", "0");
}

void LED::flash(std::string delayms ="50"){
  std::cout << "Making LED" << number << "flash" << std::endl;
  writeLED("/trigger", "timer");
  writeLED("/delay_on", delayms);
  writeLED("/delay_off", delayms);
}

void LED::outputState(){
  std::ifstream fs;
  fs.open((path + "/trigger").c_str());
  std::string line;
  while(getline(fs,line)) std::cout << line <<std::endl;
  fs.close();
}

LED::~LED(){
  std::cout << "!!Destroying the LED with path: " << path << std::endl;
}