Demos/Device/ClassDriver/DualVirtualSerial/DualVirtualSerial.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  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 DualVirtualSerial demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "DualVirtualSerial.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. This is for the first CDC interface,
  42  *  which sends strings to the host for each joystick movement.
  43  */
  44 USB_ClassInfo_CDC_Device_t VirtualSerial1_CDC_Interface =
  45         {
  46                 .Config =
  47                         {
  48                                 .ControlInterfaceNumber           = 0,
  49
  50                                 .DataINEndpointNumber             = CDC1_TX_EPNUM,
  51                                 .DataINEndpointSize               = CDC_TXRX_EPSIZE,
  52                                 .DataINEndpointDoubleBank         = false,
  53
  54                                 .DataOUTEndpointNumber            = CDC1_RX_EPNUM,
  55                                 .DataOUTEndpointSize              = CDC_TXRX_EPSIZE,
  56                                 .DataOUTEndpointDoubleBank        = false,
  57
  58                                 .NotificationEndpointNumber       = CDC1_NOTIFICATION_EPNUM,
  59                                 .NotificationEndpointSize         = CDC_NOTIFICATION_EPSIZE,
  60                                 .NotificationEndpointDoubleBank   = false,
  61                         },
  62         };
  63
  64 /** LUFA CDC Class driver interface configuration and state information. This structure is
  65  *  passed to all CDC Class driver functions, so that multiple instances of the same class
  66  *  within a device can be differentiated from one another. This is for the second CDC interface,
  67  *  which echos back all received data from the host.
  68  */
  69 USB_ClassInfo_CDC_Device_t VirtualSerial2_CDC_Interface =
  70         {
  71                 .Config =
  72                         {
  73                                 .ControlInterfaceNumber           = 2,
  74
  75                                 .DataINEndpointNumber             = CDC2_TX_EPNUM,
  76                                 .DataINEndpointSize               = CDC_TXRX_EPSIZE,
  77                                 .DataINEndpointDoubleBank         = false,
  78
  79                                 .DataOUTEndpointNumber            = CDC2_RX_EPNUM,
  80                                 .DataOUTEndpointSize              = CDC_TXRX_EPSIZE,
  81                                 .DataOUTEndpointDoubleBank        = false,
  82
  83                                 .NotificationEndpointNumber       = CDC2_NOTIFICATION_EPNUM,
  84                                 .NotificationEndpointSize         = CDC_NOTIFICATION_EPSIZE,
  85                                 .NotificationEndpointDoubleBank   = false,
  86                         },
  87         };
  88
  89 /** Main program entry point. This routine contains the overall program flow, including initial
  90  *  setup of all components and the main program loop.
  91  */
  92 int main(void)
  93 {
  94         SetupHardware();
  95
  96         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  97         sei();
  98
  99         for (;;)
 100         {
 101                 CheckJoystickMovement();
 102
 103                 /* Discard all received data on the first CDC interface */
 104                 while (CDC_Device_BytesReceived(&VirtualSerial1_CDC_Interface))
 105                   CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
 106
 107                 /* Echo all received data on the second CDC interface */
 108                 while (CDC_Device_BytesReceived(&VirtualSerial2_CDC_Interface))
 109                   CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface));
 110
 111                 CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
 112                 CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);
 113                 USB_USBTask();
 114         }
 115 }
 116
 117 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 118 void SetupHardware(void)
 119 {
 120         /* Disable watchdog if enabled by bootloader/fuses */
 121         MCUSR &= ~(1 << WDRF);
 122         wdt_disable();
 123
 124         /* Disable clock division */
 125         clock_prescale_set(clock_div_1);
 126
 127         /* Hardware Initialization */
 128         Joystick_Init();
 129         LEDs_Init();
 130         USB_Init();
 131 }
 132
 133 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change
 134  *  through the first of the CDC interfaces.
 135  */
 136 void CheckJoystickMovement(void)
 137 {
 138         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 139         char*       ReportString  = NULL;
 140         static bool ActionSent = false;
 141
 142         if (JoyStatus_LCL & JOY_UP)
 143           ReportString = "Joystick Up\r\n";
 144         else if (JoyStatus_LCL & JOY_DOWN)
 145           ReportString = "Joystick Down\r\n";
 146         else if (JoyStatus_LCL & JOY_LEFT)
 147           ReportString = "Joystick Left\r\n";
 148         else if (JoyStatus_LCL & JOY_RIGHT)
 149           ReportString = "Joystick Right\r\n";
 150         else if (JoyStatus_LCL & JOY_PRESS)
 151           ReportString = "Joystick Pressed\r\n";
 152         else
 153           ActionSent = false;
 154
 155         if ((ReportString != NULL) && (ActionSent == false))
 156         {
 157                 ActionSent = true;
 158
 159                 CDC_Device_SendString(&VirtualSerial1_CDC_Interface, ReportString, strlen(ReportString));
 160         }
 161 }
 162
 163 /** Event handler for the library USB Connection event. */
 164 void EVENT_USB_Device_Connect(void)
 165 {
 166         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 167 }
 168
 169 /** Event handler for the library USB Disconnection event. */
 170 void EVENT_USB_Device_Disconnect(void)
 171 {
 172         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 173 }
 174
 175 /** Event handler for the library USB Configuration Changed event. */
 176 void EVENT_USB_Device_ConfigurationChanged(void)
 177 {
 178         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 179
 180         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial1_CDC_Interface)))
 181           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 182
 183         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial2_CDC_Interface)))
 184           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 185 }
 186
 187 /** Event handler for the library USB Unhandled Control Request event. */
 188 void EVENT_USB_Device_UnhandledControlRequest(void)
 189 {
 190         CDC_Device_ProcessControlRequest(&VirtualSerial1_CDC_Interface);
 191         CDC_Device_ProcessControlRequest(&VirtualSerial2_CDC_Interface);
 192 }