Led_BBB_lenguaje_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"

CLED::CLED(int ledNumber){
	this->ledNumber = ledNumber; //Solo para argumentos que sean numeros
	std::ostringstream s;
	s << LED_PATH << ledNumber;
	path =std::string(s.str()); //convert to string
}

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

void CLED::RemoveTrigger(){
	WriteLED("/trigger", "none");
}

void CLED::TurnOn(){
	std::cout << "LED" << ledNumber << "on" << std::endl;
	RemoveTrigger();
	WriteLED("/brightness", "1");
}

void CLED::TurnOff(){
	std::cout << "LED" << ledNumber << "off" << std::endl;
        RemoveTrigger();
	WriteLED("/brightness","0");	

}


void CLED::blink(){
	std::cout << "LED" << ledNumber << "blinking" << std::endl;
	WriteLED("/trigger", "timer");
	WriteLED("/delay_on", "50");
	WriteLED("/delay_off", "50");

}

CLED::~CLED(){
	std::cout << "destroying LED " << path << std::endl;
}


int main(int argc, char* argv[]){
	if(argc!=2){
		std::cout << "Para usarse es: makeLEDS <comand>" << std::endl;
		std::cout << "los comandos son on, off y blink" << std::endl;
	}
	std::cout << "Starting app" << std::endl;
	std::string cmd(argv[1]);
	
	// se crean 4 objetos de LED y se ponen en el array para controlar todos los LEDS.
	CLED leds[4]= {CLED(0), CLED(1), CLED(2), CLED(3) };

	for(int i=0; i<=3; i++){
		if(cmd=="on")leds[i].TurnOn();
		else if(cmd=="off")leds[i].TurnOff();
		else if(cmd=="blink")leds[i].blink();
		else{std::cout << "comando invalido" << std::endl;}	
	}	
	std::cout << "programa terminado" << std::endl;
	return 0;

}