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Copyright (C) Dean Camera, 2012.
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dean [at] fourwalledcubicle [dot] com
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Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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* Main source file for the VirtualSerial demo. This file contains the main tasks of
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* the demo and is responsible for the initial application hardware configuration.
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#include "VirtualSerial.h"
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/** LUFA CDC Class driver interface configuration and state information. This structure is
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* passed to all CDC Class driver functions, so that multiple instances of the same class
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* within a device can be differentiated from one another.
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USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
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.ControlInterfaceNumber = 0,
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.Address = CDC_TX_EPADDR,
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.Size = CDC_TXRX_EPSIZE,
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.Address = CDC_RX_EPADDR,
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.Size = CDC_TXRX_EPSIZE,
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.NotificationEndpoint =
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.Address = CDC_NOTIFICATION_EPADDR,
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.Size = CDC_NOTIFICATION_EPSIZE,
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/** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be
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* used like any regular character stream in the C APIs
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static FILE USBSerialStream;
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#define BUTTON 0b10000000
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#define LEDB 0b00100000
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// set PD7 (button) to input
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// enable pull-up on PD7 (button)
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// set PD5 (ledb) to output
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static bool sent = false;
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// if PD7 is low, we have a press!
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fputs( "press\r\n", &USBSerialStream );
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/** Main program entry point. This routine contains the overall program flow, including initial
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* setup of all components and the main program loop.
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/* Create a regular character stream for the interface so that it can be used with the stdio.h functions */
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CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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/* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
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CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
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CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
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/** Configures the board hardware and chip peripherals for the demo's functionality. */
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void SetupHardware(void)
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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/* Disable clock division */
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clock_prescale_set(clock_div_1);
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/* Hardware Initialization */
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/** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
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void CheckJoystickMovement(void)
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uint8_t JoyStatus_LCL = Joystick_GetStatus();
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char* ReportString = NULL;
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static bool ActionSent = false;
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if (JoyStatus_LCL & JOY_UP)
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ReportString = "Joystick Up\r\n";
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else if (JoyStatus_LCL & JOY_DOWN)
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ReportString = "Joystick Down\r\n";
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else if (JoyStatus_LCL & JOY_LEFT)
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ReportString = "Joystick Left\r\n";
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else if (JoyStatus_LCL & JOY_RIGHT)
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ReportString = "Joystick Right\r\n";
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else if (JoyStatus_LCL & JOY_PRESS)
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ReportString = "Joystick Pressed\r\n";
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if ((ReportString != NULL) && (ActionSent == false))
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/* Write the string to the virtual COM port via the created character stream */
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fputs(ReportString, &USBSerialStream);
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/* Alternatively, without the stream: */
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// CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString);
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/** Event handler for the library USB Connection event. */
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void EVENT_USB_Device_Connect(void)
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LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
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/** Event handler for the library USB Disconnection event. */
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void EVENT_USB_Device_Disconnect(void)
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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/** Event handler for the library USB Configuration Changed event. */
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void EVENT_USB_Device_ConfigurationChanged(void)
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bool ConfigSuccess = true;
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ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
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LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
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/** Event handler for the library USB Control Request reception event. */
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void EVENT_USB_Device_ControlRequest(void)
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CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);