first commit

led.cpp

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+/* 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;
+
+}

led.h

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+/* class LED for manage BBB leds
+ * Daniel Llamas  14/03/2022*/
+#ifndef LED_H
+#define LED_H
+#include<iostream>
+#include<fstream>
+#include<string>
+#include<sstream>
+
+
+class CLED{
+	private:
+		std::string path;
+		int ledNumber;
+		virtual void WriteLED(std::string filename, std::string value);
+		virtual void RemoveTrigger();
+	public:
+		CLED(int ledNumber); //class creator
+		virtual void TurnOn();
+		virtual void TurnOff();
+		virtual void blink();
+		virtual ~CLED(); //class deconstructor
+};
+
+#endif

main.cpp

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+
+
+//#include<string>
+using namespace std;
+
+int main(int argc, char* argv[]){
+	CLED led1 = CLED(3);
+	led1.TurnOn();
+	return 0;
+}
+

makefile

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+all: 
+	g++ main.cpp -o led led.cpp
+
+clean:
+	rm led
+
+debug:
+	g++ -g main.cpp -o led led.cpp