Moved USBtoSerial demo the Projects directory, as it is simply an expanded CDC demo. Added const qualifier to Endpoint/Pipe stream write routines.

1 files changed, 194 insertions, 0 deletions

diff --git a/Projects/USBtoSerial/USBtoSerial.c b/Projects/USBtoSerial/USBtoSerial.c
new file mode 100644
index 000000000..31c80da1e
--- /dev/null
+++ b/Projects/USBtoSerial/USBtoSerial.c
@@ -0,0 +1,194 @@
+/*

+             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 project. 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_Device_t VirtualSerial_CDC_Interface =

+	{

+		.Config = 

+			{

+				.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 (;;)

+	{

+		/* Read bytes from the USB OUT endpoint into the USART transmit buffer */

+		for (uint8_t DataBytesRem = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface); DataBytesRem != 0; DataBytesRem--)

+		{

+			if (!(BUFF_STATICSIZE - Rx_Buffer.Elements))

+			  break;

+			  

+			Buffer_StoreElement(&Rx_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));

+		}

+		

+		/* Read bytes from the USART receive buffer into the USB IN endpoint */

+		if (Tx_Buffer.Elements)

+		  CDC_Device_SendByte(&VirtualSerial_CDC_Interface, Buffer_GetElement(&Tx_Buffer));

+		

+		/* Load bytes from the USART transmit buffer into the USART */

+		if (Rx_Buffer.Elements)

+		  Serial_TxByte(Buffer_GetElement(&Rx_Buffer));

+		

+		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 */

+	Serial_Init(9600, false);

+	LEDs_Init();

+	USB_Init();

+}

+

+/** Event handler for the library USB Connection event. */

+void EVENT_USB_Device_Connect(void)

+{

+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);

+}

+

+/** Event handler for the library USB Disconnection event. */

+void EVENT_USB_Device_Disconnect(void)

+{

+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);

+}

+

+/** Event handler for the library USB Configuration Changed event. */

+void EVENT_USB_Device_ConfigurationChanged(void)

+{

+	LEDs_SetAllLEDs(LEDMASK_USB_READY);

+

+	if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))

+	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);

+}

+

+/** Event handler for the library USB Unhandled Control Request event. */

+void EVENT_USB_Device_UnhandledControlRequest(void)

+{

+	CDC_Device_ProcessControlRequest(&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)

+{

+	uint8_t ReceivedByte = UDR1;

+

+	if (USB_DeviceState == DEVICE_STATE_Configured)

+	  Buffer_StoreElement(&Tx_Buffer, ReceivedByte);

+}

+

+/** Event handler for the CDC Class driver Line Encoding Changed event.

+ *

+ *  \param[in] CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced

+ */

+void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)

+{

+	uint8_t ConfigMask = 0;

+

+	switch (CDCInterfaceInfo->State.LineEncoding.ParityType)

+	{

+		case CDC_PARITY_Odd:

+			ConfigMask = ((1 << UPM11) | (1 << UPM10));		

+			break;

+		case CDC_PARITY_Even:

+			ConfigMask = (1 << UPM11);		

+			break;

+	}

+

+	if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)

+	  ConfigMask |= (1 << USBS1);

+

+	switch (CDCInterfaceInfo->State.LineEncoding.DataBits)

+	{

+		case 6:

+			ConfigMask |= (1 << UCSZ10);

+			break;

+		case 7:

+			ConfigMask |= (1 << UCSZ11);

+			break;

+		case 8:

+			ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));

+			break;

+	}

+	

+	UCSR1A = (1 << U2X1);	

+	UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));

+	UCSR1C = ConfigMask;	

+	UBRR1  = SERIAL_2X_UBBRVAL((uint16_t)CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);

+}