Cours:DevoirPOO2 classes

eclairagedimmable.h #ifndef ECLAIRAGEDIMMABLE_H #define ECLAIRAGEDIMMABLE_H #include <QObject> class EclairageDimmable : public QObject { Q_OBJECT public: explicit EclairageDimmable(QObject *parent = nullptr); bool isOn; unsigned int puissance; // entre 1 et 4 public slots: void allumer(); void eteindre(); void augmenterPuissance(); void diminuerPuissance(); protected: virtual void appliquerConsigne(); signals: }; #endif // ECLAIRAGEDIMMABLE_H

eclairagedimmable.cpp #include "eclairagedimmable.h" #include <QDebug> EclairageDimmable::EclairageDimmable(QObject *parent) : QObject(parent) { isOn=false; puissance=1; } void EclairageDimmable::allumer() { isOn=true; appliquerConsigne(); } void EclairageDimmable::eteindre() { isOn=false; appliquerConsigne(); } void EclairageDimmable::augmenterPuissance() { if (puissance<4) puissance++; appliquerConsigne(); } void EclairageDimmable::diminuerPuissance() { if (puissance>1) puissance--; appliquerConsigne(); } void EclairageDimmable::appliquerConsigne() { qDebug() << "je suis "<< (isOn==true?"allumée":"éteinte")<< " à la puissance "<<puissance; }

barregraphe.h #ifndef BARREGRAPHE_H #define BARREGRAPHE_H #include "eclairagedimmable.h" #include "gpio.h" using namespace exploringRPi; class Barregraphe : public EclairageDimmable { public: Barregraphe(int pinLed1, int pinLed2, int pinLed3, int pinLed4); protected: GPIO led1; GPIO led2; GPIO led3; GPIO led4; void appliquerConsigne() override; }; #endif // BARREGRAPHE_H

barregraphe.cpp #include "barregraphe.h" Barregraphe::Barregraphe(int pinLed1, int pinLed2, int pinLed3, int pinLed4) :led1(pinLed1),led2(pinLed2),led3(pinLed3),led4(pinLed4) { led1.setDirection(OUTPUT); led2.setDirection(OUTPUT); led3.setDirection(OUTPUT); led4.setDirection(OUTPUT); } void Barregraphe::appliquerConsigne() { EclairageDimmable::appliquerConsigne(); v if (isOn==false) { led1.setValue(LOW); led2.setValue(LOW); led3.setValue(LOW); led4.setValue(LOW); } else { if (puissance==1) { led1.setValue(HIGH); led2.setValue(LOW); led3.setValue(LOW); led4.setValue(LOW); } else if (puissance==2) { led1.setValue(HIGH); led2.setValue(HIGH); led3.setValue(LOW); led4.setValue(LOW); } else if (puissance==3) { led1.setValue(HIGH); led2.setValue(HIGH); led3.setValue(HIGH); led4.setValue(LOW); } else { led1.setValue(HIGH); led2.setValue(HIGH); led3.setValue(HIGH); led4.setValue(HIGH); } } }

leddimmable.h #ifndef LEDDIMMABLE_H #define LEDDIMMABLE_H #include "eclairagedimmable.h" enum numeroPWM{ PWM0, PWM1 }; class ledDimmable : public EclairageDimmable { public: ledDimmable(numeroPWM _numero); protected: int numeroGPIO; int rapportCyclique; void appliquerConsigne() override; }; #endif // LEDDIMMABLE_H

leddimmable.cpp #include "leddimmable.h" #include <pigpio.h> ledDimmable::ledDimmable(numeroPWM _numero) : EclairageDimmable() { gpioInitialise(); if (_numero==PWM0) numeroGPIO=12; else numeroGPIO=13; appliquerConsigne(); } void ledDimmable::appliquerConsigne() { EclairageDimmable::appliquerConsigne(); if (isOn==false) { gpioHardwarePWM(numeroGPIO,500,0); } else { gpioHardwarePWM(numeroGPIO,500,puissance*10000); } }

gpio.h #ifndef GPIO_H #define GPIO_H #include<string> #include<fstream> using std::string; using std::ofstream; #define GPIO_PATH "/sys/class/gpio/" namespace exploringRPi { typedef int (*CallbackType)(int); enum GPIO_DIRECTION{ INPUT, OUTPUT }; enum GPIO_VALUE{ LOW=0, HIGH=1 }; enum GPIO_EDGE{ NONE, RISING, FALLING, BOTH }; class GPIO { private: int number, debounceTime; string name, path; public: GPIO(int number); // constructor exports pin virtual int getNumber() { return number; } // General Input and Output Settings virtual int setDirection(GPIO_DIRECTION); virtual GPIO_DIRECTION getDirection(); virtual int setValue(GPIO_VALUE); virtual int toggleOutput(); virtual GPIO_VALUE getValue(); virtual int setActiveLow(bool isLow=true); // low=1, high=0 virtual int setActiveHigh(); // default state virtual void setDebounceTime(int time) { this->debounceTime = time; } // Advanced output: faster by keeping the stream open (~20x) virtual int streamOpen(); virtual int streamWrite(GPIO_VALUE); virtual int streamClose(); virtual int toggleOutput(int time); // thread invert output every X ms virtual int toggleOutput(int numberOfTimes, int time); virtual void changeToggleTime(int time) { this->togglePeriod = time; } virtual void toggleCancel() { this->threadRunning = false; } // Advanced input: detect input edges -- threaded and non-threaded virtual int setEdgeType(GPIO_EDGE); virtual GPIO_EDGE getEdgeType(); virtual int waitForEdge(); // waits until button is pressed virtual int waitForEdge(CallbackType callback); // threaded callback virtual void waitForEdgeCancel() { this->threadRunning = false; } virtual ~GPIO(); // destructor unexports the pin private: int write(string path, string filename, string value); int write(string path, string filename, int value); string read(string path, string filename); int exportGPIO(); int unexportGPIO(); ofstream stream; pthread_t thread; CallbackType callbackFunction; bool threadRunning; int togglePeriod; // default 100ms int toggleNumber; // default -1 (infinite) friend void* threadedPoll(void *value); friend void* threadedToggle(void *value); }; void* threadedPoll(void *value); // callback functions for threads void* threadedToggle(void *value); // callback functions for threads } /* namespace exploringRPi */ #endif // GPIO_H

gpio.cpp #include "gpio.h" #include<iostream> #include<fstream> #include<string> #include<sstream> #include<cstdlib> #include<cstdio> #include<fcntl.h> #include<unistd.h> #include<sys/epoll.h> #include<pthread.h> using namespace std; namespace exploringRPi { /** * * @param number The GPIO number for the RPi */ GPIO::GPIO(int number) { this->number = number; this->debounceTime = 0; this->togglePeriod=100; this->toggleNumber=-1; //infinite number this->callbackFunction = NULL; this->threadRunning = false; ostringstream s; s << "gpio" << number; this->name = string(s.str()); this->path = GPIO_PATH + this->name + "/"; this->exportGPIO(); // need to give Linux time to set up the sysfs structure usleep(250000); // 250ms delay } int GPIO::write(string path, string filename, string value){ ofstream fs; fs.open((path + filename).c_str()); if (!fs.is_open()){ perror("GPIO: write failed to open file "); return -1; } fs << value; fs.close(); return 0; } string GPIO::read(string path, string filename){ ifstream fs; fs.open((path + filename).c_str()); if (!fs.is_open()){ perror("GPIO: read failed to open file "); } string input; getline(fs,input); fs.close(); return input; } int GPIO::write(string path, string filename, int value){ stringstream s; s << value; return this->write(path,filename,s.str()); } int GPIO::exportGPIO(){ return this->write(GPIO_PATH, "export", this->number); } int GPIO::unexportGPIO(){ return this->write(GPIO_PATH, "unexport", this->number); } int GPIO::setDirection(GPIO_DIRECTION dir){ switch(dir){ case INPUT: return this->write(this->path, "direction", "in"); break; case OUTPUT:return this->write(this->path, "direction", "out"); break; } return -1; } int GPIO::setValue(GPIO_VALUE value){ switch(value){ case HIGH: return this->write(this->path, "value", "1"); break; case LOW: return this->write(this->path, "value", "0"); break; } return -1; } int GPIO::setEdgeType(GPIO_EDGE value){ switch(value){ case NONE: return this->write(this->path, "edge", "none"); break; case RISING: return this->write(this->path, "edge", "rising"); break; case FALLING: return this->write(this->path, "edge", "falling"); break; case BOTH: return this->write(this->path, "edge", "both"); break; } return -1; } int GPIO::setActiveLow(bool isLow){ if(isLow) return this->write(this->path, "active_low", "1"); else return this->write(this->path, "active_low", "0"); } int GPIO::setActiveHigh(){ return this->setActiveLow(false); } GPIO_VALUE GPIO::getValue(){ string input = this->read(this->path, "value"); if (input == "0") return LOW; else return HIGH; } GPIO_DIRECTION GPIO::getDirection(){ string input = this->read(this->path, "direction"); if (input == "in") return INPUT; else return OUTPUT; } GPIO_EDGE GPIO::getEdgeType(){ string input = this->read(this->path, "edge"); if (input == "rising") return RISING; else if (input == "falling") return FALLING; else if (input == "both") return BOTH; else return NONE; } int GPIO::streamOpen(){ stream.open((path + "value").c_str()); return 0; } int GPIO::streamWrite(GPIO_VALUE value){ stream << value << std::flush; return 0; } int GPIO::streamClose(){ stream.close(); return 0; } int GPIO::toggleOutput(){ this->setDirection(OUTPUT); if ((bool) this->getValue()) this->setValue(LOW); else this->setValue(HIGH); return 0; } int GPIO::toggleOutput(int time){ return this->toggleOutput(-1, time); } int GPIO::toggleOutput(int numberOfTimes, int time){ this->setDirection(OUTPUT); this->toggleNumber = numberOfTimes; this->togglePeriod = time; this->threadRunning = true; if(pthread_create(&this->thread, NULL, &threadedToggle, static_cast<void*>(this))){ perror("GPIO: Failed to create the toggle thread"); this->threadRunning = false; return -1; } return 0; } // This thread function is a friend function of the class void* threadedToggle(void *value){ GPIO *gpio = static_cast<GPIO*>(value); bool isHigh = (bool) gpio->getValue(); //find current value while(gpio->threadRunning){ if (isHigh) gpio->setValue(HIGH); else gpio->setValue(LOW); usleep(gpio->togglePeriod * 500); isHigh=!isHigh; if(gpio->toggleNumber>0) gpio->toggleNumber--; if(gpio->toggleNumber==0) gpio->threadRunning=false; } return 0; } // Blocking Poll - based on the epoll socket code in the epoll man page int GPIO::waitForEdge(){ this->setDirection(INPUT); // must be an input pin to poll its value int fd, i, epollfd, count=0; struct epoll_event ev; epollfd = epoll_create(1); if (epollfd == -1) { perror("GPIO: Failed to create epollfd"); return -1; } if ((fd = open((this->path + "value").c_str(), O_RDONLY | O_NONBLOCK)) == -1) { perror("GPIO: Failed to open file"); return -1; } //ev.events = read operation | edge triggered | urgent data ev.events = EPOLLIN | EPOLLET | EPOLLPRI; ev.data.fd = fd; // attach the file file descriptor //Register the file descriptor on the epoll instance, see: man epoll_ctl if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) == -1) { perror("GPIO: Failed to add control interface"); return -1; } while(count<=1){ // ignore the first trigger i = epoll_wait(epollfd, &ev, 1, -1); if (i==-1){ perror("GPIO: Poll Wait fail"); count=5; // terminate loop } else { count++; // count the triggers up } } close(fd); if (count==5) return -1; return 0; } // This thread function is a friend function of the class void* threadedPoll(void *value){ GPIO *gpio = static_cast<GPIO*>(value); while(gpio->threadRunning){ gpio->callbackFunction(gpio->waitForEdge()); usleep(gpio->debounceTime * 1000); } return 0; } int GPIO::waitForEdge(CallbackType callback){ this->threadRunning = true; this->callbackFunction = callback; // create the thread, pass the reference, address of the function and data if(pthread_create(&this->thread, NULL, &threadedPoll, static_cast<void*>(this))){ perror("GPIO: Failed to create the poll thread"); this->threadRunning = false; return -1; } return 0; } GPIO::~GPIO() { this->unexportGPIO(); } } /* namespace exploringRPi */

bouton.h #ifndef BOUTON_H #define BOUTON_H #include <QObject> #include <QFileSystemWatcher> #include "gpio.h" using namespace exploringRPi; class Bouton : public QObject { Q_OBJECT public: explicit Bouton(int nbBroche,GPIO_EDGE typeFront); bool getValue(); private: GPIO broche; QFileSystemWatcher fileScanner; signals: void change(); public slots: void evenementBroche(); }; #endif // BOUTON_H

bouton.cpp #include "bouton.h" Bouton::Bouton(int nbBroche, GPIO_EDGE typeFront) : QObject(), broche(nbBroche) { broche.setDirection(INPUT); broche.setEdgeType(typeFront); fileScanner.addPath(QString("/sys/class/gpio/gpio%1/value").arg(nbBroche)); connect(&fileScanner,SIGNAL(fileChanged(QString)),this,SLOT(evenementBroche())); } bool Bouton::getValue() { return broche.getValue(); } void Bouton::evenementBroche() { emit change(); }