Several fixes to GCodeSender, including compilation on older OS X and DTR reset

lib/Slic3r/GUI/Controller/ManualControlDialog.pm

@@ -60,7 +60,7 @@ sub new {
             my ($pos) = @_;
             
             # delete any pending commands to get a smoother movement
-            $self->purge_queue(1);
+            $self->sender->purge_queue(1);
             $self->abs_xy_move($pos);
         });
         $bed_sizer->Add($canvas, 0, wxEXPAND | wxRIGHT, 3);
@@ -97,6 +97,7 @@ sub new {
     my $main_sizer = Wx::BoxSizer->new(wxVERTICAL);
     $main_sizer->Add($bed_sizer, 1, wxEXPAND | wxALL, 10);
     $main_sizer->Add($self->CreateButtonSizer(wxCLOSE), 0, wxEXPAND);
+    EVT_BUTTON($self, wxID_CLOSE, sub { $self->Close });
     
     $self->SetSizer($main_sizer);
     $self->SetMinSize($self->GetSize);

xs/Build.PL

@@ -10,7 +10,8 @@ use Module::Build::WithXSpp;
 # _GLIBCXX_USE_C99 : to get the long long type for g++
 # HAS_BOOL         : stops Perl/lib/CORE/handy.h from doing "#  define bool char" for MSVC
 # NOGDI            : prevents inclusion of wingdi.h which defines functions Polygon() and Polyline() in global namespace
-my @cflags = qw(-D_GLIBCXX_USE_C99 -DHAS_BOOL -DNOGDI -DSLIC3RXS);
+# BOOST_ASIO_DISABLE_KQUEUE : prevents a Boost ASIO bug on OS X: https://svn.boost.org/trac/boost/ticket/5339
+my @cflags = qw(-D_GLIBCXX_USE_C99 -DHAS_BOOL -DNOGDI -DSLIC3RXS -DBOOST_ASIO_DISABLE_KQUEUE);
 
 my @INC  = qw();
 my @LIBS = qw();

xs/src/libslic3r/GCodeSender.cpp

@@ -36,6 +36,8 @@ GCodeSender::~GCodeSender()
 bool
 GCodeSender::connect(std::string devname, unsigned int baud_rate)
 {
+    this->disconnect();
+    
     this->set_error_status(false);
     try {
         this->serial.open(devname);
@@ -57,6 +59,7 @@ GCodeSender::connect(std::string devname, unsigned int baud_rate)
     // set baud rate again because set_option overwrote it
     this->set_baud_rate(baud_rate);
     this->open = true;
+    this->reset();
     
     // this gives some work to the io_service before it is started
     // (post() runs the supplied function in its thread)
@@ -117,7 +120,6 @@ void
 GCodeSender::disconnect()
 {
     if (!this->open) return;
-
     this->open = false;
     this->connected = false;
     this->io.post(boost::bind(&GCodeSender::do_close, this));
@@ -262,25 +264,32 @@ GCodeSender::on_read(const boost::system::error_code& error,
 {
     this->set_error_status(false);
     if (error) {
+        if (error.value() == 45) {
+            // OS X bug: http://osdir.com/ml/lib.boost.asio.user/2008-08/msg00004.html
+            this->do_read();
+        } else {
+            // printf("ERROR: [%d] %s\n", error.value(), error.message().c_str());
             // error can be true even because the serial port was closed.
             // In this case it is not a real error, so ignore.
             if (this->open) {
                 this->do_close();
                 this->set_error_status(true);
             }
+        }
         return;
     }
     
-    // copy the read buffer into string
     std::istream is(&this->read_buffer);
     std::string line;
     std::getline(is, line);
+    if (!line.empty()) {
         // note that line might contain \r at its end
-    
         // parse incoming line
         if (!this->connected
             && (boost::starts_with(line, "start")
-         || boost::starts_with(line, "Grbl "))) {
+             || boost::starts_with(line, "Grbl ")
+             || boost::starts_with(line, "ok")
+             || boost::contains(line, "T:"))) {
             this->connected = true;
             {
                 boost::lock_guard<boost::mutex> l(this->queue_mutex);
@@ -332,6 +341,7 @@ GCodeSender::on_read(const boost::system::error_code& error,
                 }
             }
         }
+    }
     
     this->do_read();
 }
@@ -370,6 +380,12 @@ GCodeSender::send(const std::string &line, bool priority)
 
 void
 GCodeSender::send()
+{
+    this->io.post(boost::bind(&GCodeSender::do_send, this));
+}
+
+void
+GCodeSender::do_send()
 {
     boost::lock_guard<boost::mutex> l(this->queue_mutex);
     
@@ -414,15 +430,47 @@ GCodeSender::do_send(const std::string &line)
        cs = cs ^ *it;
     
     // write line to device
-    asio::streambuf b;
-    std::ostream os(&b);
-    os << full_line << "*" << cs << "\n";
-    asio::write(this->serial, b);
+    full_line += "*";
+    full_line += boost::lexical_cast<std::string>(cs);
+    full_line += "\n";
+    asio::async_write(this->serial, asio::buffer(full_line), boost::bind(&GCodeSender::do_send, this));
     
     this->last_sent = line;
     this->can_send = false;
 }
 
+void
+GCodeSender::set_DTR(bool on)
+{
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+    asio::serial_port_service::native_handle_type handle = this->serial.native_handle();
+    if (on)
+        EscapeCommFunction(handle, SETDTR);
+    else
+        EscapeCommFunction(handle, CLRDTR);
+#else
+    int fd = this->serial.native_handle();
+    int status;
+    ioctl(fd, TIOCMGET, &status);
+    if (on)
+        status |= TIOCM_DTR;
+    else
+        status &= ~TIOCM_DTR;
+    ioctl(fd, TIOCMSET, &status);
+#endif
+}
+
+void
+GCodeSender::reset()
+{
+    this->set_DTR(false);
+    boost::this_thread::sleep(boost::posix_time::milliseconds(200));
+    this->set_DTR(true);
+    boost::this_thread::sleep(boost::posix_time::milliseconds(200));
+    this->set_DTR(false);
+    boost::this_thread::sleep(boost::posix_time::milliseconds(1000));
+}
+
 }
 
 #ifdef SLIC3RXS

xs/src/libslic3r/GCodeSender.hpp

@@ -32,6 +32,8 @@ class GCodeSender : private boost::noncopyable {
     std::vector<std::string> purge_log();
     std::string getT() const;
     std::string getB() const;
+    void set_DTR(bool on);
+    void reset();
     
     private:
     asio::io_service io;
@@ -58,6 +60,7 @@ class GCodeSender : private boost::noncopyable {
     
     void set_baud_rate(unsigned int baud_rate);
     void set_error_status(bool e);
+    void do_send();
     void do_send(const std::string &line);
     void do_close();
     void do_read();