/elec/audio-switcher

/*

             LUFA Library

     Copyright (C) Dean Camera, 2012.

  dean [at] fourwalledcubicle [dot] com

           www.lufa-lib.org

*/

/*

  Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this

  software and its documentation for any purpose is hereby granted

  without fee, 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 VirtualSerial demo. This file contains the main tasks of

 *  the demo and is responsible for the initial application hardware configuration.

 */

#include "VirtualSerial.h"

/** 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,

				.DataINEndpoint           =

					{

						.Address          = CDC_TX_EPADDR,

						.Size             = CDC_TXRX_EPSIZE,

						.Banks            = 1,

					},

				.DataOUTEndpoint =

					{

						.Address          = CDC_RX_EPADDR,

						.Size             = CDC_TXRX_EPSIZE,

						.Banks            = 1,

					},

				.NotificationEndpoint =

					{

						.Address          = CDC_NOTIFICATION_EPADDR,

						.Size             = CDC_NOTIFICATION_EPSIZE,

						.Banks            = 1,

					},

			},

	};

/** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be

 *  used like any regular character stream in the C APIs

 */

static FILE USBSerialStream;

#define BUTTON 0b10000000

#define LEDB 0b00100000

void init()

{

	// set PD7 (button) to input

	DDRD &= ~BUTTON;

	// enable pull-up on PD7 (button)

	PORTD |= BUTTON;

	// set PD5 (ledb) to output

	DDRD |= LEDB;

}

void loop()

{

	static bool sent = false;

	// if PD7 is low, we have a press!

	if( PIND & BUTTON )

	{

		if( !sent )

		{

			sent = true;

			fputs( "press\r\n", &USBSerialStream );

		}

		// set led

		PORTD |= LEDB;

	}

	else

	{

		sent = false;

		// set led

		PORTD &= ~LEDB;

	}

}

/** 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();

	/* Create a regular character stream for the interface so that it can be used with the stdio.h functions */

	CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);

	sei();

	for (;;)

	{

		loop();

		/* Must throw away unused bytes from the host, or it will lock up while waiting for the device */

		CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);

		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 */

	LEDs_Init();

	USB_Init();

	init();	

}

/** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */

#if 0

void CheckJoystickMovement(void)

{

	uint8_t     JoyStatus_LCL = Joystick_GetStatus();

	char*       ReportString  = NULL;

	static bool ActionSent    = false;

	if (JoyStatus_LCL & JOY_UP)

	  ReportString = "Joystick Up\r\n";

	else if (JoyStatus_LCL & JOY_DOWN)

	  ReportString = "Joystick Down\r\n";

	else if (JoyStatus_LCL & JOY_LEFT)

	  ReportString = "Joystick Left\r\n";

	else if (JoyStatus_LCL & JOY_RIGHT)

	  ReportString = "Joystick Right\r\n";

	else if (JoyStatus_LCL & JOY_PRESS)

	  ReportString = "Joystick Pressed\r\n";

	else

	  ActionSent = false;

	if ((ReportString != NULL) && (ActionSent == false))

	{

		ActionSent = true;

		/* Write the string to the virtual COM port via the created character stream */

		fputs(ReportString, &USBSerialStream);

		/* Alternatively, without the stream: */

		// CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString);

	}

}

#endif

/** 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)

{

	bool ConfigSuccess = true;

	ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);

	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);

}

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

void EVENT_USB_Device_ControlRequest(void)

{

	CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);

}