gpio-class/main.cpp

/*To test the gpio class for BeagleBone Black
 Gerardo Marx, April/20/2020*/
#include<iostream> // to input/output strings
#include<fstream>
#include<sstream>
#define GPIO_PATH "/sys/class/gpio/gpio"

int main(int argc, char *argv[]){
  if(argc!=2){
    std::cout << "The command usage is gpio #" << std::endl;
    std::cout << "where # is the gpio number" << std:: endl;
    return 2;
  }
  std::cout << "Starting program" << std::endl;
  int number = 44; // gpio
  std::string path;
  std::ostringstream s;
  std::ofstream fs;
  std::string file = "direction";
  s << GPIO_PATH << number; // gpio path
  path = std::string(s.str());
  fs.open((path + file).c_str());
  fs << "output";
  fs.close();
  return 0;
}