Fixed SerialStream driver blocking while waiting for characters to be received instea...

[pub/USBasp.git] / LUFA / Drivers / USB / Class / Device / CDC.c

diff --git a/LUFA/Drivers/USB/Class/Device/CDC.c b/LUFA/Drivers/USB/Class/Device/CDC.c
index e9457f7..b8a673f 100644 (file)
--- a/LUFA/Drivers/USB/Class/Device/CDC.c
+++ b/LUFA/Drivers/USB/Class/Device/CDC.c
@@ -1,13 +1,13 @@
 /*\r
              LUFA Library\r
 /*\r
              LUFA Library\r

-     Copyright (C) Dean Camera, 2009.\r
+     Copyright (C) Dean Camera, 2010.\r

               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r
               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r

-  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r

 \r
   Permission to use, copy, modify, distribute, and sell this \r
   software and its documentation for any purpose is hereby granted\r
 \r
   Permission to use, copy, modify, distribute, and sell this \r
   software and its documentation for any purpose is hereby granted\r


@@ -190,10 +190,17 @@ uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterface
 \r
        Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);\r
 \r
 \r
        Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);\r
 \r

-       if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))\r
-         Endpoint_ClearOUT();\r
+       if (Endpoint_IsOUTReceived())\r
+       {\r
+               if (!(Endpoint_BytesInEndpoint()))\r
+                 Endpoint_ClearOUT();\r

 \r
 \r

-       return Endpoint_BytesInEndpoint();\r
+               return Endpoint_BytesInEndpoint();\r
+       }\r
+       else\r
+       {\r
+               return 0;\r
+       }\r

 }\r
 \r
 uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)\r
 }\r
 \r
 uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)\r


@@ -263,6 +270,9 @@ static int CDC_Device_getchar_Blocking(FILE* Stream)
 {\r
        while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))\r
        {\r
 {\r
        while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))\r
        {\r

+               if (USB_DeviceState == DEVICE_STATE_Unattached)\r
+                 return _FDEV_EOF;\r
+       \r

                CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));\r
                USB_USBTask();\r
        }\r
                CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));\r
                USB_USBTask();\r
        }\r