If the main frame rate is less than the requested io rate, don't send multiple

copies of the same data for the sole purpose of faking it.

diff --git a/src/Main/fg_io.cxx b/src/Main/fg_io.cxx
index 997fa36b1760e247aac44c097c724594d7279970..458f956c63f554e93a7e4e0726bcdef269fdfd39 100644 (file)
--- a/src/Main/fg_io.cxx
+++ b/src/Main/fg_io.cxx
@@ -267,17 +267,12 @@ FGIO::init()
 }
 
 
-// process any serial port work
+// process any IO channel work
 void
 FGIO::update( double delta_time_sec )
 {
     // cout << "processing I/O channels" << endl;
-
-    // SGTimeStamp current_time;
-    // current_time.stamp();
-    // static SGTimeStamp start_time = current_time;
-    // double elapsed_time = (current_time - start_time) / 1000000.0;
-    // cout << " Elapsed time = " << elapsed_time << endl;
+    // cout << "  Elapsed time = " << delta_time_sec << endl;
 
     typedef vector< FGProtocol* > container;
     container::iterator i = io_channels.begin();
@@ -287,14 +282,16 @@ FGIO::update( double delta_time_sec )
 
        if ( p->is_enabled() ) {
            p->dec_count_down( delta_time_sec );
-            double dt = 1 / p->get_hz();
-           while ( p->get_count_down() < 0.33 * dt ) {
-               p->process();
+           double dt = 1 / p->get_hz();
+           if ( p->get_count_down() < 0.33 * dt ) {
+             p->process();
+             p->inc_count();
+             while ( p->get_count_down() < 0.33 * dt ) {
                p->inc_count_down( dt );
-                p->inc_count();
+             }
+             // double ave = elapsed_time / p->get_count();
+             // cout << "  ave rate = " << ave << endl;
            }
-            // double ave = elapsed_time / p->get_count();
-            // cout << "  ave rate = " << ave << endl;
        }
     }
 }