device_io_hid.hpp

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// Copyright (c) 2017-2018, The Monero Project
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//    conditions and the following disclaimer.
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#if defined(HAVE_HIDAPI) 

#include <hidapi/hidapi.h>
#include "device_io.hpp"

#pragma once

namespace hw {
  namespace io {



    struct hid_conn_params {
      unsigned int vid; 
      unsigned int pid; 
      unsigned int interface_number;
      unsigned int usage_page;
      bool interface_OR_page ;
    };
    

    class device_io_hid: device_io {
      

    private:
     

      unsigned short channel;
      unsigned char  tag;
      unsigned int   packet_size; 
      unsigned int   timeout;

      unsigned int   usb_vid;
      unsigned int   usb_pid;
      hid_device     *usb_device;

      void io_hid_log(int read, unsigned char* buf, int buf_len);
      void io_hid_init();
      void io_hid_exit() ;
      void io_hid_open(int vid, int pid,  int mode);
      void io_hid_close (void);

      unsigned int wrapCommand(const unsigned char *command, size_t command_len, unsigned char *out, size_t out_len);
      unsigned int unwrapReponse(const unsigned char *data, size_t data_len, unsigned char *out, size_t out_len);
 
 
    public:
      bool hid_verbose = false;

      const unsigned int  OR_SELECT = 1;
      const unsigned int  AND_SELECT = 2;

      const unsigned char DEFAULT_CHANNEL     = 0x0001;
      const unsigned char DEFAULT_TAG         = 0x01;
      const unsigned int  DEFAULT_PACKET_SIZE = 64;
      const unsigned int  DEFAULT_TIMEOUT     = 120000;

      device_io_hid(unsigned short channel, unsigned char tag, unsigned int packet_zize, unsigned int timeout);
      device_io_hid();
      ~device_io_hid() {};

      void init();  
      void connect(void *params);
      void connect(unsigned int vid, unsigned  int pid, unsigned int interface_number, unsigned int usage_page, bool interface_OR_page );
      bool connected() const;
      int  exchange(unsigned char *command, unsigned int cmd_len, unsigned char *response, unsigned int max_resp_len);
      void disconnect();
      void release();
    };
  };
};

#endif //#if defined(HAVE_HIDAPI)