Demos/Device/ClassDriver/VirtualSerial/VirtualSerial.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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
  49                                 .DataINEndpointNumber           = CDC_TX_EPNUM,
  50                                 .DataINEndpointSize             = CDC_TXRX_EPSIZE,
  51                                 .DataINEndpointDoubleBank       = false,
  52
  53                                 .DataOUTEndpointNumber          = CDC_RX_EPNUM,
  54                                 .DataOUTEndpointSize            = CDC_TXRX_EPSIZE,
  55                                 .DataOUTEndpointDoubleBank      = false,
  56
  57                                 .NotificationEndpointNumber     = CDC_NOTIFICATION_EPNUM,
  58                                 .NotificationEndpointSize       = CDC_NOTIFICATION_EPSIZE,
  59                                 .NotificationEndpointDoubleBank = false,
  60                         },
  61         };
  62
  63 /** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be
  64  *  used like any regular character stream in the C APIs
  65  */
  66 static FILE USBSerialStream;
  67
  68
  69 /** Main program entry point. This routine contains the overall program flow, including initial
  70  *  setup of all components and the main program loop.
  71  */
  72 int main(void)
  73 {
  74         SetupHardware();
  75
  76         /* Create a regular character stream for the interface so that it can be used with the stdio.h functions */
  77         CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);
  78
  79         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  80         sei();
  81
  82         for (;;)
  83         {
  84                 CheckJoystickMovement();
  85
  86                 /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
  87                 CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  88
  89                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
  90                 USB_USBTask();
  91         }
  92 }
  93
  94 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  95 void SetupHardware(void)
  96 {
  97         /* Disable watchdog if enabled by bootloader/fuses */
  98         MCUSR &= ~(1 << WDRF);
  99         wdt_disable();
 100
 101         /* Disable clock division */
 102         clock_prescale_set(clock_div_1);
 103
 104         /* Hardware Initialization */
 105         Joystick_Init();
 106         LEDs_Init();
 107         USB_Init();
 108 }
 109
 110 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 111 void CheckJoystickMovement(void)
 112 {
 113         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 114         char*       ReportString  = NULL;
 115         static bool ActionSent    = false;
 116
 117         if (JoyStatus_LCL & JOY_UP)
 118           ReportString = "Joystick Up\r\n";
 119         else if (JoyStatus_LCL & JOY_DOWN)
 120           ReportString = "Joystick Down\r\n";
 121         else if (JoyStatus_LCL & JOY_LEFT)
 122           ReportString = "Joystick Left\r\n";
 123         else if (JoyStatus_LCL & JOY_RIGHT)
 124           ReportString = "Joystick Right\r\n";
 125         else if (JoyStatus_LCL & JOY_PRESS)
 126           ReportString = "Joystick Pressed\r\n";
 127         else
 128           ActionSent = false;
 129
 130         if ((ReportString != NULL) && (ActionSent == false))
 131         {
 132                 ActionSent = true;
 133
 134                 /* Write the string to the virtual COM port via the created character stream */
 135                 fputs(ReportString, &USBSerialStream);
 136
 137                 /* Alternatively, without the stream: */
 138                 // CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString);
 139         }
 140 }
 141
 142 /** Event handler for the library USB Connection event. */
 143 void EVENT_USB_Device_Connect(void)
 144 {
 145         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 146 }
 147
 148 /** Event handler for the library USB Disconnection event. */
 149 void EVENT_USB_Device_Disconnect(void)
 150 {
 151         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 152 }
 153
 154 /** Event handler for the library USB Configuration Changed event. */
 155 void EVENT_USB_Device_ConfigurationChanged(void)
 156 {
 157         bool ConfigSuccess = true;
 158
 159         ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
 160
 161         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 162 }
 163
 164 /** Event handler for the library USB Control Request reception event. */
 165 void EVENT_USB_Device_ControlRequest(void)
 166 {
 167         CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 168 }
 169