From 7860469661711bc9f73b2ae84529511693245d7b Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Tue, 24 Nov 2020 00:06:59 +0700
Subject: [PATCH] comment out and add note for tud_cdc_connected() in cdc_msc
 examples

---
 examples/device/cdc_dual_ports/src/main.c   | 2 ++
 examples/device/cdc_msc/src/main.c          | 6 ++++--
 examples/device/cdc_msc_freertos/src/main.c | 9 ++++++---
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/examples/device/cdc_dual_ports/src/main.c b/examples/device/cdc_dual_ports/src/main.c
index d6e38df85..198c4252b 100644
--- a/examples/device/cdc_dual_ports/src/main.c
+++ b/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) )
diff --git a/examples/device/cdc_msc/src/main.c b/examples/device/cdc_msc/src/main.c
index cf2bfd7c9..6b13ba5a4 100644
--- a/examples/device/cdc_msc/src/main.c
+++ b/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");
diff --git a/examples/device/cdc_msc_freertos/src/main.c b/examples/device/cdc_msc_freertos/src/main.c
index 1371b84c3..3d2e6dc49 100644
--- a/examples/device/cdc_msc_freertos/src/main.c
+++ b/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();
   }
 }