USBtoSerial demo now discards all Rx data when not connected to a USB host, rather...

[pub/lufa.git] / Demos / USBtoSerial / USBtoSerial.c

diff --git a/Demos/USBtoSerial/USBtoSerial.c b/Demos/USBtoSerial/USBtoSerial.c
index 7c06007..0cef8d1 100644 (file)
--- a/Demos/USBtoSerial/USBtoSerial.c
+++ b/Demos/USBtoSerial/USBtoSerial.c
@@ -116,6 +116,10 @@ EVENT_HANDLER(USB_Disconnect)
        /* Stop running CDC and USB management tasks */\r
        Scheduler_SetTaskMode(CDC_Task, TASK_STOP);\r
        Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);\r
+       \r
+       /* Reset Tx and Rx buffers, device disconnected */\r
+       Buffer_Initialize(&Rx_Buffer);\r
+       Buffer_Initialize(&Tx_Buffer);\r
 \r
        /* Indicate USB not ready */\r
        UpdateStatus(Status_USBNotReady);\r
@@ -322,8 +326,12 @@ ISR(USART1_TX_vect, ISR_BLOCK)
  */\r
 ISR(USART1_RX_vect, ISR_BLOCK)\r
 {\r
-       /* Character received, store it into the buffer */\r
-       Buffer_StoreElement(&Tx_Buffer, UDR1);\r
+       /* Only store received characters if the USB interface is connected */\r
+       if (USB_IsConnected)\r
+       {\r
+               /* Character received, store it into the buffer */\r
+               Buffer_StoreElement(&Tx_Buffer, UDR1);\r
+       }\r
 }\r
 \r
 /** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to\r