Don't fail Doxygen on versions built without various features.

[pub/USBasp.git] / Projects / USBtoSerial / USBtoSerial.c

diff --git a/Projects/USBtoSerial/USBtoSerial.c b/Projects/USBtoSerial/USBtoSerial.c
index b51c7c2..343b51b 100644 (file)
--- a/Projects/USBtoSerial/USBtoSerial.c
+++ b/Projects/USBtoSerial/USBtoSerial.c
@@ -194,7 +194,7 @@ ISR(USART1_RX_vect, ISR_BLOCK)
 {
        uint8_t ReceivedByte = UDR1;
 
-       if (USB_DeviceState == DEVICE_STATE_Configured)
+       if ((USB_DeviceState == DEVICE_STATE_Configured) && !(RingBuffer_IsFull(&USARTtoUSB_Buffer)))
          RingBuffer_Insert(&USARTtoUSB_Buffer, ReceivedByte);
 }