pruss.h

#ifndef PRUSS_H_
#define PRUSS_H_

#include <stdlib.h>
#include <linux/limits.h> // realpath
#include <string> // string handling
#include <sys/socket.h> // socket
#include <sys/un.h> // socket
#include <unistd.h> // close()
#include <errno.h> // error codes

//enumeration which describes the states of a PRU Core 
enum State
{
    NONE,
    STOPPED,
    RUNNING,
    HALTED
};

//enumeration which describes which memory access is required
enum Memory
{
    DATA0 = 0,
    DATA1 = 1,
    SHARED = 3
};

class Socket
{
    private:
        const char* socketpath;
        struct sockaddr_un addr;
        int fd;
        Socket();
        bool conn();
        bool disconn();
        std::string sendcmd(std::string);
        friend class PRUSS; //Only these classes have access to the Socket class
        friend class PRU; //Only these classes have access to the Socket class
};

class PRU
{
    private:
        int number;
        int chanPort;
        std::string chanName;
        Socket sock;
        State state = NONE; 
        PRU(int);
        PRU(int, std::string);
        friend class PRUSS; //Only PRUSS class can call the PRU class constructors
    public:
        int enable();
        int disable();
        int reset();
        int pause();
        int resume();
        std::string showRegs();
        int load(std::string);
        void setChannel();
        int setChannel(int, std::string);
        State getState();
                int sendMsg_string(std::string);
                void sendMsg_raw(std::string);
        std::string getMsg();
        int waitForEvent();
        int waitForEvent(int);
                std::string mem_read(Memory mem, std::string);
                std::string mem_write(Memory mem, std::string, std::string);
};

class PRUSS
{
    private:
        bool on = false;
        Socket sock;
        PRUSS();
        ~PRUSS();
    public:
        static PRUSS& get();
        PRU pru0;
        PRU pru1;
        bool isOn();
        int bootUp();
        int shutDown();
        void restart();

};
#endif