comment out and add note for tud_cdc_connected() in cdc_msc examples

examples/device/cdc_dual_ports/src/main.c

@@ -83,6 +83,8 @@ static void cdc_task(void)
 
   for (itf = 0; itf < CFG_TUD_CDC; itf++)
   {
+    // connected() check for DTR bit
+    // Most but not all terminal client set this when making connection
     if ( tud_cdc_n_connected(itf) )
     {
       if ( tud_cdc_n_available(itf) )

examples/device/cdc_msc/src/main.c

@@ -105,7 +105,9 @@ void tud_resume_cb(void)
 //--------------------------------------------------------------------+
 void cdc_task(void)
 {
-  if ( tud_cdc_connected() )
+  // connected() check for DTR bit
+  // Most but not all terminal client set this when making connection
+  // if ( tud_cdc_connected() )
   {
     // connected and there are data available
     if ( tud_cdc_available() )
@@ -133,7 +135,7 @@ void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
   (void) itf;
 
   // connected
-  if ( dtr && rts )
+  if ( dtr )
   {
     // print initial message when connected
     tud_cdc_write_str("\r\nTinyUSB CDC MSC device example\r\n");

examples/device/cdc_msc_freertos/src/main.c

@@ -168,9 +168,11 @@ void cdc_task(void* params)
   // RTOS forever loop
   while ( 1 )
   {
-    if ( tud_cdc_connected() )
+    // connected() check for DTR bit
+    // Most but not all terminal client set this when making connection
+    // if ( tud_cdc_connected() )
     {
-      // connected and there are data available
+      // There are data available
       if ( tud_cdc_available() )
       {
         uint8_t buf[64];
@@ -200,10 +202,11 @@ void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
   (void) itf;
 
   // connected
-  if ( dtr && rts )
+  if ( dtr )
   {
     // print initial message when connected
     tud_cdc_write_str("\r\nTinyUSB CDC MSC device with FreeRTOS example\r\n");
+    tud_cdc_write_flush();
   }
 }