Gpio.h

#pragma once
#include <cstdint>
#include "Mmap.h"
 
class Gpio{
public:
        Gpio();
 
        ~Gpio();
 
        typedef enum {
                INPUT,
                OUTPUT,
        } Direction;

        int open(unsigned int pin, Direction direction, bool unexport = true);
        
        void close();

        bool read(){
                return (gpio[GPIO_DATAIN] & pinMask);
        }

        void set(){
                gpio[GPIO_SETDATAOUT] = pinMask;
        }

        void clear(){
                gpio[GPIO_CLEARDATAOUT] = pinMask;
        }

        void write(bool value){
                if(value){
                        set();
                } else {
                        clear();
                }
        }

        bool enabled(){
                return nullptr != gpio;
        }

        static uint32_t getBankAddress(unsigned int bank);
private:
        static constexpr uint32_t GPIO_DATAIN = (0x138 / 4);
        static constexpr uint32_t GPIO_CLEARDATAOUT = (0x190 / 4);
        static constexpr uint32_t GPIO_SETDATAOUT = (0x194 / 4);
        bool shouldUnexport;
        Mmap mmap;
        int pin;
        uint32_t pinMask;
        volatile uint32_t* gpio;
};