X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/6a7c298c0f7119e44e18de15d714cd8b938e3bef..b9b03aadb219d06fbad9d110e508db93e45461af:/Demos/Device/ClassDriver/USBtoSerial/USBtoSerial.c

diff --git a/Demos/Device/ClassDriver/USBtoSerial/USBtoSerial.c b/Demos/Device/ClassDriver/USBtoSerial/USBtoSerial.c
new file mode 100644
index 000000000..85826c2b3
--- /dev/null
+++ b/Demos/Device/ClassDriver/USBtoSerial/USBtoSerial.c
@@ -0,0 +1,175 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2009.
+              
+  dean [at] fourwalledcubicle [dot] com
+      www.fourwalledcubicle.com
+*/
+
+/*
+  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] 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 USBtoSerial demo. This file contains the main tasks of
+ *  the demo and is responsible for the initial application hardware configuration.
+ */
+
+#include "USBtoSerial.h"
+
+/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
+RingBuff_t Rx_Buffer;
+
+/** Circular buffer to hold data from the serial port before it is sent to the host. */
+RingBuff_t Tx_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_t VirtualSerial_CDC_Interface =
+	{
+		.ControlInterfaceNumber     = 0,
+
+		.DataINEndpointNumber       = CDC_TX_EPNUM,
+		.DataINEndpointSize         = CDC_TXRX_EPSIZE,
+
+		.DataOUTEndpointNumber      = CDC_RX_EPNUM,
+		.DataOUTEndpointSize        = CDC_TXRX_EPSIZE,
+
+		.NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
+		.NotificationEndpointSize   = CDC_NOTIFICATION_EPSIZE,
+	};
+
+/** 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(&Rx_Buffer);
+	Buffer_Initialize(&Tx_Buffer);
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+
+	for (;;)
+	{
+		for (uint8_t DataBytesRem = USB_CDC_BytesReceived(&VirtualSerial_CDC_Interface); DataBytesRem != 0; DataBytesRem--)
+		{
+			if (!(BUFF_STATICSIZE - Rx_Buffer.Elements))
+			  break;
+			  
+			Buffer_StoreElement(&Rx_Buffer, USB_CDC_ReceiveByte(&VirtualSerial_CDC_Interface));
+		}
+		
+		if (Tx_Buffer.Elements)
+		  USB_CDC_SendByte(&VirtualSerial_CDC_Interface, Buffer_GetElement(&Rx_Buffer));
+		  
+		if (Rx_Buffer.Elements)
+		  Serial_TxByte(Buffer_GetElement(&Rx_Buffer));
+		
+		USB_CDC_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 */
+	Joystick_Init();
+	LEDs_Init();
+	USB_Init();
+}
+
+/** Event handler for the library USB Connection event. */
+void EVENT_USB_Connect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Disconnect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_ConfigurationChanged(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_READY);
+
+	if (!(USB_CDC_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
+	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+}
+
+/** Event handler for the library USB Unhandled Control Packet event. */
+void EVENT_USB_UnhandledControlPacket(void)
+{
+	USB_CDC_ProcessControlPacket(&VirtualSerial_CDC_Interface);
+}
+
+/** ISR to manage the reception of data from the serial port, placing received bytes into a circular buffer
+ *  for later transmission to the host.
+ */
+ISR(USART1_RX_vect, ISR_BLOCK)
+{
+	if (USB_IsConnected)
+	  Buffer_StoreElement(&Tx_Buffer, UDR1);
+}
+
+/** Event handler for the CDC Class driver Line Encoding Changed event.
+ *
+ *  \param CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced
+ */
+void EVENT_USB_CDC_LineEncodingChanged(USB_ClassInfo_CDC_t* CDCInterfaceInfo)
+{
+	uint8_t ConfigMask = 0;
+
+	if (CDCInterfaceInfo->LineEncoding.ParityType == CDC_PARITY_Odd)
+	  ConfigMask = ((1 << UPM11) | (1 << UPM10));
+	else if (CDCInterfaceInfo->LineEncoding.ParityType == CDC_PARITY_Even)
+	  ConfigMask = (1 << UPM11);
+
+	if (CDCInterfaceInfo->LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)
+	  ConfigMask |= (1 << USBS1);
+
+	if (CDCInterfaceInfo->LineEncoding.DataBits == 6)
+	  ConfigMask |= (1 << UCSZ10);
+	else if (CDCInterfaceInfo->LineEncoding.DataBits == 7)
+	  ConfigMask |= (1 << UCSZ11);
+	else if (CDCInterfaceInfo->LineEncoding.DataBits == 8)
+	  ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
+	
+	UCSR1A = (1 << U2X1);	
+	UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
+	UCSR1C = ConfigMask;	
+	UBRR1  = SERIAL_2X_UBBRVAL((uint16_t)CDCInterfaceInfo->LineEncoding.BaudRateBPS);
+}