实验中发现滚屏太快，需要减少 uhd 的调试输出。

modules/uhd/uhd_usrp_io/uhd_io.cpp

@@ -209,7 +209,7 @@ int do_iio(const cmdlineParser & args)
 								tag_tx_plain * plan = (tag_tx_plain *) (packagedta.data());
 								if (total_points_left<=0)
 									total_points_left = plan->length_left;
-								fprintf(stderr,"plan %d points\n",plan->length_left);
+								//fprintf(stderr,"plan %d points\n",plan->length_left);
 								mtx_plan.lock();
 								tx_plan.push_back(*plan);
 								mtx_plan.unlock();
@@ -221,7 +221,7 @@ int do_iio(const cmdlineParser & args)
 						}
 						else
 						{
-							fprintf(stderr,"recv %d points\n",packagedta.size()/2/sizeof(SPTYPE));
+							//fprintf(stderr,"recv %d points\n",packagedta.size()/2/sizeof(SPTYPE));
 							for (int ch = 0; ch < tx_channel_count;++ch)
 							{
 								if (header.subject_id == i_wav_tx[ch])
@@ -652,7 +652,7 @@ int do_iio(const cmdlineParser & args)
 								&&  tx_pos[ch] + (long long) (total_points_left ) > stdin_pos[ch]
 								)
 						{
-							fprintf(stderr,"total_points LESS! for %d points\n",total_points_left);
+							fprintf(stderr,"total_points LESS! for %lld points\n",total_points_left);
 							can_send = false;
 							continue;
 						}
@@ -764,9 +764,8 @@ int do_iio(const cmdlineParser & args)
 
 		while (!stop_signal_called)
 		{
-			fprintf(stderr,"\nRX:");
+			fprintf(stderr,"RX:");
 			fprintf (stderr,"%lld,%lld;",rx_pos,stdout_pos);
-			fprintf(stderr,"\n");
 			fprintf(stderr,"TX:");
 			for (int ch = 0;ch<tx_channel_count;++ch)
 				fprintf (stderr,"%d:%lld,%lld;",ch,stdin_pos[ch],tx_pos[ch]);