From c05c7c7df46a0377db8a72cb32f06aa40153d3e1 Mon Sep 17 00:00:00 2001
From: Dean Camera <dean@fourwalledcubicle.com>
Date: Wed, 25 Nov 2009 00:36:18 +0000
Subject: Added new XPLAIN serial Bridge project (thanks to John Steggall for
 the software UART code).

---
 Projects/XPLAINBridge/XPLAINBridge.c | 133 +++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 Projects/XPLAINBridge/XPLAINBridge.c

(limited to 'Projects/XPLAINBridge/XPLAINBridge.c')

diff --git a/Projects/XPLAINBridge/XPLAINBridge.c b/Projects/XPLAINBridge/XPLAINBridge.c
new file mode 100644
index 000000000..68cca5446
--- /dev/null
+++ b/Projects/XPLAINBridge/XPLAINBridge.c
@@ -0,0 +1,133 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2009.
+              
+  dean [at] fourwalledcubicle [dot] com
+      www.fourwalledcubicle.com
+*/
+
+/*
+  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2009  John Steggall (steggall.j@gmail.com)
+
+  Permission to use, copy, modify, and distribute this software
+  and its documentation for any purpose and without fee is hereby
+  granted, provided that the above copyright notice appear in all
+  copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Main source file for the XPLAINBridge project. This file contains the main tasks of
+ *  the demo and is responsible for the initial application hardware configuration.
+ */
+
+#include "XPLAINBridge.h"
+
+/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
+RingBuff_t USBtoUART_Buffer;
+
+/** Circular buffer to hold data from the serial port before it is sent to the host. */
+RingBuff_t UARTtoUSB_Buffer;
+
+/** 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
+ *  within a device can be differentiated from one another.
+ */
+USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
+	{
+		.Config = 
+			{
+				.ControlInterfaceNumber         = 0,
+
+				.DataINEndpointNumber           = CDC_TX_EPNUM,
+				.DataINEndpointSize             = CDC_TXRX_EPSIZE,
+				.DataINEndpointDoubleBank       = false,
+
+				.DataOUTEndpointNumber          = CDC_RX_EPNUM,
+				.DataOUTEndpointSize            = CDC_TXRX_EPSIZE,
+				.DataOUTEndpointDoubleBank      = false,
+
+				.NotificationEndpointNumber     = CDC_NOTIFICATION_EPNUM,
+				.NotificationEndpointSize       = CDC_NOTIFICATION_EPSIZE,
+				.NotificationEndpointDoubleBank = false,
+			},
+	};
+
+/** Main program entry point. This routine contains the overall program flow, including initial
+ *  setup of all components and the main program loop.
+ */
+int main(void)
+{
+	SetupHardware();
+	
+	Buffer_Initialize(&USBtoUART_Buffer);
+	Buffer_Initialize(&UARTtoUSB_Buffer);
+
+	for (;;)
+	{
+		/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
+		for (uint8_t DataBytesRem = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface); DataBytesRem != 0; DataBytesRem--)
+		{
+			if (!(BUFF_STATICSIZE - USBtoUART_Buffer.Elements))
+			  break;
+			  
+			Buffer_StoreElement(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
+		}
+		
+		/* Read bytes from the UART receive buffer into the USB IN endpoint */
+		if (UARTtoUSB_Buffer.Elements)
+		  CDC_Device_SendByte(&VirtualSerial_CDC_Interface, Buffer_GetElement(&UARTtoUSB_Buffer));
+		
+		/* Load bytes from the UART transmit buffer into the UART */
+		if ((USBtoUART_Buffer.Elements) && SoftUART_IsReady())
+		  SoftUART_TxByte(Buffer_GetElement(&USBtoUART_Buffer));
+		
+		/* Load bytes from the UART into the UART receive buffer */
+		if(SoftUART_IsReceived())
+			Buffer_StoreElement(&UARTtoUSB_Buffer, SoftUART_RxByte());
+
+		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+		USB_USBTask();
+	}
+}
+
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
+{
+	/* Disable watchdog if enabled by bootloader/fuses */
+	MCUSR &= ~(1 << WDRF);
+	wdt_disable();
+
+	/* Disable clock division */
+	clock_prescale_set(clock_div_1);
+
+	/* Hardware Initialization */
+	SoftUART_Init();
+	USB_Init();
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+}
+
+/** Event handler for the library USB Unhandled Control Request event. */
+void EVENT_USB_Device_UnhandledControlRequest(void)
+{
+	CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+}
-- 
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