Fix XPLAINBridge project discarding characters from the USB interface due to a double...

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

diff --git a/LUFA/Drivers/USB/Class/Host/CDC.c b/LUFA/Drivers/USB/Class/Host/CDC.c
index 5fb232c..b9e4c9e 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/CDC.c
+++ b/LUFA/Drivers/USB/Class/Host/CDC.c
@@ -205,7 +205,6 @@ void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
          return;
        
        Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
-       Pipe_SetPipeToken(PIPE_TOKEN_IN);
        Pipe_Unfreeze();
 
        if (Pipe_IsINReceived())
@@ -285,7 +284,7 @@ uint8_t CDC_Host_SendBreak(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 }
 
 uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
-                            char* const Data,
+                            const char* const Data,
                             const uint16_t Length)
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
@@ -333,7 +332,6 @@ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
          return 0;
        
        Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
-       Pipe_SetPipeToken(PIPE_TOKEN_IN);
        Pipe_Unfreeze();
 
        if (Pipe_IsINReceived())
@@ -360,25 +358,25 @@ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
 
 int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 {
-       uint8_t ReceivedByte = -1;
-
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
-         return 0;
+         return -1;
          
+       int16_t ReceivedByte = -1;
+
        Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
-       Pipe_SetPipeToken(PIPE_TOKEN_IN);
        Pipe_Unfreeze();
 
-       if (!(Pipe_IsINReceived()))
-         return -1;
-       else if (Pipe_BytesInPipe())
-         ReceivedByte = Pipe_Read_Byte();
+       if (Pipe_IsINReceived())
+       {
+               if (Pipe_BytesInPipe())
+                 ReceivedByte = Pipe_Read_Byte();
 
-       if (!(Pipe_BytesInPipe()))
-         Pipe_ClearIN();
-               
-       Pipe_Freeze();
+               if (!(Pipe_BytesInPipe()))
+                 Pipe_ClearIN();
+       }
        
+       Pipe_Freeze();
+
        return ReceivedByte;
 }