#include "raspberrypigpiopin.h"
#include <cassert>
#include <iostream>
#include <string>
#include <boost/lexical_cast.hpp>
namespace rpi {
namespace gpio {
Pin::Pin(const int pin)
: m_is_high(true),
m_pin_number(pin)
{
#ifndef NDEBUG
const std::set<int> pins = CreatePinNumbers();
assert(pins.count(pin));
#endif
this->SetOutputHigh();
}
const std::set<int> Pin::CreatePinNumbers()
{
//Note that I commented out pin number 27
//I do not know why I have so often included it, but I must have read it somewhere
const std::set<int> pins { 3,5,7,8,10,11,12,13,15,16,18,19,21,22,23,24,26 };
return pins;
}
void Pin::SetOutputHigh()
{
{
const std::string cmd = "echo \"" + boost::lexical_cast<std::string>(GetPinNumber()) + "\" > /sys/class/gpio/export";
std::clog << cmd << '\n';
const int error = std::system(cmd.c_str());
if (error) std::cerr << "Error: " << error << '\n';
}
{
const std::string cmd = "echo \"out\" > /sys/class/gpio/gpio" + boost::lexical_cast<std::string>(GetPinNumber())+ "/direction";
std::clog << cmd << '\n';
const int error = std::system(cmd.c_str());
if (error) std::cerr << "Error: " << error << '\n';
}
{
const std::string cmd = "echo \"1\" > /sys/class/gpio/gpio" + boost::lexical_cast<std::string>(GetPinNumber())+ "/value";
std::clog << cmd << '\n';
const int error = std::system(cmd.c_str());
if (error) std::cerr << "Error: " << error << '\n';
}
m_is_high = true;
}
void Pin::SetOutputLow()
{
{
const std::string cmd = "echo \"0\" > /sys/class/gpio/gpio" + boost::lexical_cast<std::string>(GetPinNumber())+ "/value";
std::clog << cmd << '\n';
const int error = std::system(cmd.c_str());
if (error) std::cerr << "Error: " << error << '\n';
}
{
const std::string cmd = "echo \"" + boost::lexical_cast<std::string>(GetPinNumber()) + "\" > /sys/class/gpio/unexport";
std::clog << cmd << '\n';
const int error = std::system(cmd.c_str());
if (error) std::cerr << "Error: " << error << '\n';
}
m_is_high = false;
}
void Pin::Toggle()
{
m_is_high ? SetOutputLow() : SetOutputHigh();
}
bool operator<(const Pin& lhs, const Pin& rhs)
{
assert(lhs.GetPinNumber() != rhs.GetPinNumber());
return lhs.GetPinNumber() < rhs.GetPinNumber();
}
} //namespace gpio
} //namespace rpi
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