examples/usbclient.cc

   1 ///
   2 /// \file       usbclient.cc
   3 ///             Example code using the Barry library to interface
   4 ///             with a custom USB channel on a Blackberry device.
   5 ///
   6
   7 /*
   8     Copyright (C) 2010, RealVNC Ltd.
   9
  10     This program is free software; you can redistribute it and/or modify
  11     it under the terms of the GNU General Public License as published by
  12     the Free Software Foundation; either version 2 of the License, or
  13     (at your option) any later version.
  14
  15     This program is distributed in the hope that it will be useful,
  16     but WITHOUT ANY WARRANTY; without even the implied warranty of
  17     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  18
  19     See the GNU General Public License in the COPYING file at the
  20     root directory of this project for more details.
  21 */
  22
  23 #include <barry/barry.h>
  24 #include <iostream>
  25 #include <cstring>
  26 #include <string>
  27
  28 using namespace std;
  29 using namespace Barry;
  30
  31 // This example is intended to provide similar functionality to the 'usbclient'
  32 // example provided as a sample with BlackBerry JDEs. It is intended to
  33 // be run with the 'usbdemo' sample application running on the BlackBerry. The
  34 // 'usbdemo' sample application is provided as a sample with BlackBerry JDEs.
  35 //
  36 // A more complex use of Barry::RawChannel can be found in tools/brawchannel.cc
  37
  38 #define CHANNEL_NAME  "JDE_USBClient"
  39
  40 #define GCF_HEADER_SIZE 2
  41
  42 #define GCF_SIZE(buf) ((size_t)((buf[0] << 8) | (buf[1])))
  43
  44 #define HELLO_TO_BB   "Hello from PC"
  45 #define HELLO_FROM_BB "Hello from Device"
  46 #define BYE_TO_BB     "Goodbye from PC"
  47 #define BYE_FROM_BB   "Goodbye from Device"
  48
  49 // Function to print the data read
  50 static void printReply(Data &data)
  51 {
  52         // Need to work out if it's a GCF wrapped reply or a USBPort based
  53         // reply.
  54         // To do this take the first two bytes as a length value and see
  55         // if they match the data length.
  56         string strdata;
  57         if(data.GetSize() < GCF_HEADER_SIZE ||
  58             GCF_SIZE(data.GetData()) != (data.GetSize() - GCF_HEADER_SIZE) ) {
  59                 // USBPort data
  60                 strdata = string((const char*)data.GetData(), data.GetSize());
  61         }
  62         else {
  63                 // GCF header present
  64                 strdata = string((const char*)data.GetData() + GCF_HEADER_SIZE,
  65                               data.GetSize() - GCF_HEADER_SIZE);
  66         }
  67         cout << "Received data: " << strdata << endl;
  68
  69 }
  70
  71 int main(int argc, char *argv[])
  72 {
  73         try {
  74                 Barry::Init();
  75
  76                 Barry::Probe probe;
  77                 if( probe.GetCount() == 0 ) {
  78                         cout << "No Blackberry found!" << endl;
  79                         return 1;
  80                 }
  81                 else {
  82                         cout << "Using PIN: "
  83                              << probe.Get(0).m_pin.Str() << endl;
  84                 }
  85
  86                 // Create the router
  87                 auto_ptr<SocketRoutingQueue> router;
  88                 router.reset(new SocketRoutingQueue());
  89                 router->SpinoffSimpleReadThread();
  90
  91                 // Create our controller object
  92                 Barry::Controller con(probe.Get(0), *router);
  93
  94                 // Create the raw channel
  95                 Barry::Mode::RawChannel rawChannel(con);
  96
  97                 cout << "Connecting to device channel with an empty password" << endl;
  98                 rawChannel.Open("", CHANNEL_NAME);
  99
 100                 cout << "Sending hello to device: " << HELLO_TO_BB << endl;
 101                 Data data(HELLO_TO_BB, sizeof(HELLO_TO_BB) - 1);
 102                 rawChannel.Send(data);
 103
 104                 cout << "Waiting for reply from device" << endl;
 105                 rawChannel.Receive(data);
 106                 printReply(data);
 107
 108                 cout << "Sending bye bye to the device: " << BYE_TO_BB << endl;
 109                 data = Data(BYE_TO_BB, sizeof(BYE_TO_BB) - 1);
 110                 rawChannel.Send(data);
 111
 112                 cout << "Waiting for response from device" << endl;
 113                 rawChannel.Receive(data);
 114                 printReply(data);
 115
 116                 cout << "All send and received OK, exiting" << endl;
 117
 118         }
 119         catch( Barry::Error &e ) {
 120                 cerr << "Exception caught: " << e.what() << endl;
 121                 return 1;
 122         }
 123         catch( std::exception &e ) {
 124                 cerr << "Exception caught: " << e.what() << endl;
 125                 return 1;
 126         }
 127
 128         return 0;
 129 }
 130