(C++) RaspberryPi

 

 

RaspberryPi is a collection of class for working with a Raspberry Pi.

Technical facts

 

 

 

 

 

 

./CppRaspberryPi/CppRaspberryPi.pri

 

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INCLUDEPATH += \     ../../Classes/CppDial SOURCES += \     ../../Classes/CppDial/dial.cpp HEADERS  += \     ../../Classes/CppDial/dial.h OTHER_FILES += \     ../../Classes/CppDial/Licence.txt

 

 

 

 

 

./CppRaspberryPi/raspberrypifwd.h

 

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#ifndef RASPBERRYPIFWD_H #define RASPBERRYPIFWD_H namespace rpi {   namespace gpio {     struct Pin;   } //~namespace gpio } //namespace rpi #endif // RASPBERRYPIFWD_H

 

 

 

 

 

./CppRaspberryPi/raspberrypigpiopin.h

 

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#ifndef RASPBERRYPIGPIOPIN_H #define RASPBERRYPIGPIOPIN_H #include <set> namespace rpi { namespace gpio { constexpr int GetMaxPinNumber() { return 26; } struct Pin {   ///Create a pin and set its output to high   Pin(const int pin_number);   ///Create all valid Pin indices   static const std::set<int> CreatePinNumbers();   ///Get the pin number   int GetPinNumber() const { return m_pin_number; }   ///Set the output to high   void SetOutputHigh();   ///Set the output to low   void SetOutputLow();   //Toggle the output value   void Toggle();   private:   ///Is the output high? Or is it low?   bool m_is_high;   ///The pin number   const int m_pin_number; }; bool operator<(const Pin& lhs, const Pin& rhs); } //namespace gpio } //namespace rpi #endif // RASPBERRYPIGPIOPIN_H

 

 

 

 

 

./CppRaspberryPi/raspberrypigpiopin.cpp

 

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#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