X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/dfe50ff34970eda173cafbb3d636a5f7bedc87bd..3c72896e84f54dab6d604518a355b37ea318df21:/Projects/XPLAINBridge/XPLAINBridge.c

diff --git a/Projects/XPLAINBridge/XPLAINBridge.c b/Projects/XPLAINBridge/XPLAINBridge.c
index 2e8e6a89e..f02fe9bad 100644
--- a/Projects/XPLAINBridge/XPLAINBridge.c
+++ b/Projects/XPLAINBridge/XPLAINBridge.c
@@ -36,8 +36,8 @@
 
 #include "XPLAINBridge.h"
 
-/* Current firmware mode, making the device behave as either a programmer or a USART bridge */
-bool CurrentFirmwareMode = MODE_PDI_PROGRAMMER;
+/** Current firmware mode, making the device behave as either a programmer or a USART bridge */
+bool CurrentFirmwareMode = MODE_USART_BRIDGE;
 
 /** LUFA CDC Class driver interface configuration and state information. This structure is
  *  passed to all CDC Class driver functions, so that multiple instances of the same class
@@ -120,17 +120,19 @@ void UARTBridge_Task(void)
 	  return;
 
 	/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
-	if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface) && !(RingBuffer_IsFull(&USBtoUART_Buffer)))
-	  RingBuffer_AtomicInsert(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
+	int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+	if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUART_Buffer)))
+	  RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
 	
-	/* Check if the software UART flush timer has expired */
-	if (TIFR0 & (1 << TOV0))
+	/* Check if the UART receive buffer flush timer has expired or buffer is nearly full */
+	RingBuff_Count_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);
+	if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
 	{
 		TIFR0 |= (1 << TOV0);
 
 		/* Read bytes from the UART receive buffer into the USB IN endpoint */
-		while (UARTtoUSB_Buffer.Count)
-		  CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_AtomicRemove(&UARTtoUSB_Buffer));
+		while (BufferCount--)
+		  CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&UARTtoUSB_Buffer));
 	}
 
 	CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
@@ -183,6 +185,9 @@ void EVENT_USB_Device_ConfigurationChanged(void)
 		/* Initialize ring buffers used to hold serial data between USB and software UART interfaces */
 		RingBuffer_InitBuffer(&USBtoUART_Buffer);
 		RingBuffer_InitBuffer(&UARTtoUSB_Buffer);
+		
+		/* Start the software USART */
+		SoftUART_Init();
 	}
 	else
 	{
@@ -240,8 +245,16 @@ void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCI
  *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
  *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
  *  USB host.
+ *
+ *  \param[in]  wValue  Descriptor type and index to retrieve
+ *  \param[in]  wIndex  Sub-index to retrieve (such as a localized string language)
+ *  \param[out] DescriptorAddress  Address of the retrieved descriptor
+ *
+ *  \return Length of the retrieved descriptor in bytes, or NO_DESCRIPTOR if the descriptor was not found
  */
-uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)
+uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
+                                    const uint8_t wIndex,
+                                    void** const DescriptorAddress)
 {
 	/* Return the correct descriptors based on the selected mode */
 	if (CurrentFirmwareMode == MODE_USART_BRIDGE)