Demos/Device/ClassDriver/VirtualSerial/VirtualSerial.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Main source file for the VirtualSerial demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "VirtualSerial.h"
  38
  39 /** LUFA CDC Class driver interface configuration and state information. This structure is
  40  *  passed to all CDC Class driver functions, so that multiple instances of the same class
  41  *  within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .ControlInterfaceNumber   = 0,
  48                                 .DataINEndpoint           =
  49                                         {
  50                                                 .Address          = CDC_TX_EPADDR,
  51                                                 .Size             = CDC_TXRX_EPSIZE,
  52                                                 .Banks            = 1,
  53                                         },
  54                                 .DataOUTEndpoint =
  55                                         {
  56                                                 .Address          = CDC_RX_EPADDR,
  57                                                 .Size             = CDC_TXRX_EPSIZE,
  58                                                 .Banks            = 1,
  59                                         },
  60                                 .NotificationEndpoint =
  61                                         {
  62                                                 .Address          = CDC_NOTIFICATION_EPADDR,
  63                                                 .Size             = CDC_NOTIFICATION_EPSIZE,
  64                                                 .Banks            = 1,
  65                                         },
  66                         },
  67         };
  68
  69 /** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be
  70  *  used like any regular character stream in the C APIs
  71  */
  72 static FILE USBSerialStream;
  73
  74
  75 /** Main program entry point. This routine contains the overall program flow, including initial
  76  *  setup of all components and the main program loop.
  77  */
  78 int main(void)
  79 {
  80         SetupHardware();
  81
  82         /* Create a regular character stream for the interface so that it can be used with the stdio.h functions */
  83         CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);
  84
  85         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  86         sei();
  87
  88         for (;;)
  89         {
  90                 CheckJoystickMovement();
  91
  92                 /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
  93                 CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  94
  95                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
  96                 USB_USBTask();
  97         }
  98 }
  99
 100 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 101 void SetupHardware(void)
 102 {
 103         /* Disable watchdog if enabled by bootloader/fuses */
 104         MCUSR &= ~(1 << WDRF);
 105         wdt_disable();
 106
 107         /* Disable clock division */
 108         clock_prescale_set(clock_div_1);
 109
 110         /* Hardware Initialization */
 111         Joystick_Init();
 112         LEDs_Init();
 113         USB_Init();
 114 }
 115
 116 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 117 void CheckJoystickMovement(void)
 118 {
 119         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 120         char*       ReportString  = NULL;
 121         static bool ActionSent    = false;
 122
 123         if (JoyStatus_LCL & JOY_UP)
 124           ReportString = "Joystick Up\r\n";
 125         else if (JoyStatus_LCL & JOY_DOWN)
 126           ReportString = "Joystick Down\r\n";
 127         else if (JoyStatus_LCL & JOY_LEFT)
 128           ReportString = "Joystick Left\r\n";
 129         else if (JoyStatus_LCL & JOY_RIGHT)
 130           ReportString = "Joystick Right\r\n";
 131         else if (JoyStatus_LCL & JOY_PRESS)
 132           ReportString = "Joystick Pressed\r\n";
 133         else
 134           ActionSent = false;
 135
 136         if ((ReportString != NULL) && (ActionSent == false))
 137         {
 138                 ActionSent = true;
 139
 140                 /* Write the string to the virtual COM port via the created character stream */
 141                 fputs(ReportString, &USBSerialStream);
 142
 143                 /* Alternatively, without the stream: */
 144                 // CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString);
 145         }
 146 }
 147
 148 /** Event handler for the library USB Connection event. */
 149 void EVENT_USB_Device_Connect(void)
 150 {
 151         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 152 }
 153
 154 /** Event handler for the library USB Disconnection event. */
 155 void EVENT_USB_Device_Disconnect(void)
 156 {
 157         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 158 }
 159
 160 /** Event handler for the library USB Configuration Changed event. */
 161 void EVENT_USB_Device_ConfigurationChanged(void)
 162 {
 163         bool ConfigSuccess = true;
 164
 165         ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
 166
 167         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 168 }
 169
 170 /** Event handler for the library USB Control Request reception event. */
 171 void EVENT_USB_Device_ControlRequest(void)
 172 {
 173         CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 174 }
 175