Demos/Device/ClassDriver/VirtualSerialMouse/VirtualSerialMouse.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 VirtualSerialMouse demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "VirtualSerialMouse.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 /** Buffer to hold the previously generated Mouse HID report, for comparison purposes inside the HID class driver. */
  64 uint8_t PrevMouseHIDReportBuffer[sizeof(USB_MouseReport_Data_t)];
  65
  66 /** LUFA HID Class driver interface configuration and state information. This structure is
  67  *  passed to all HID Class driver functions, so that multiple instances of the same class
  68  *  within a device can be differentiated from one another.
  69  */
  70 USB_ClassInfo_HID_Device_t Mouse_HID_Interface =
  71         {
  72                 .Config =
  73                         {
  74                                 .InterfaceNumber                = 2,
  75
  76                                 .ReportINEndpointNumber         = MOUSE_EPNUM,
  77                                 .ReportINEndpointSize           = MOUSE_EPSIZE,
  78                                 .ReportINEndpointDoubleBank     = false,
  79
  80                                 .PrevReportINBuffer             = PrevMouseHIDReportBuffer,
  81                                 .PrevReportINBufferSize         = sizeof(PrevMouseHIDReportBuffer),
  82                         },
  83         };
  84
  85 /** Main program entry point. This routine contains the overall program flow, including initial
  86  *  setup of all components and the main program loop.
  87  */
  88 int main(void)
  89 {
  90         SetupHardware();
  91
  92         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  93         sei();
  94
  95         for (;;)
  96         {
  97                 CheckJoystickMovement();
  98
  99                 /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
 100                 while (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
 101                   CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
 102
 103                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
 104                 HID_Device_USBTask(&Mouse_HID_Interface);
 105                 USB_USBTask();
 106         }
 107 }
 108
 109 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 110 void SetupHardware(void)
 111 {
 112         /* Disable watchdog if enabled by bootloader/fuses */
 113         MCUSR &= ~(1 << WDRF);
 114         wdt_disable();
 115
 116         /* Disable clock division */
 117         clock_prescale_set(clock_div_1);
 118
 119         /* Hardware Initialization */
 120         Joystick_Init();
 121         LEDs_Init();
 122         USB_Init();
 123 }
 124
 125 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 126 void CheckJoystickMovement(void)
 127 {
 128         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 129         char*       ReportString  = NULL;
 130         static bool ActionSent    = false;
 131
 132         if (JoyStatus_LCL & JOY_UP)
 133           ReportString = "Joystick Up\r\n";
 134         else if (JoyStatus_LCL & JOY_DOWN)
 135           ReportString = "Joystick Down\r\n";
 136         else if (JoyStatus_LCL & JOY_LEFT)
 137           ReportString = "Joystick Left\r\n";
 138         else if (JoyStatus_LCL & JOY_RIGHT)
 139           ReportString = "Joystick Right\r\n";
 140         else if (JoyStatus_LCL & JOY_PRESS)
 141           ReportString = "Joystick Pressed\r\n";
 142         else
 143           ActionSent = false;
 144
 145         if ((ReportString != NULL) && (ActionSent == false))
 146         {
 147                 ActionSent = true;
 148
 149                 CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
 150         }
 151 }
 152
 153 /** Event handler for the library USB Connection event. */
 154 void EVENT_USB_Device_Connect(void)
 155 {
 156         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 157 }
 158
 159 /** Event handler for the library USB Disconnection event. */
 160 void EVENT_USB_Device_Disconnect(void)
 161 {
 162         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 163 }
 164
 165 /** Event handler for the library USB Configuration Changed event. */
 166 void EVENT_USB_Device_ConfigurationChanged(void)
 167 {
 168         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 169
 170         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
 171           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 172
 173         if (!(HID_Device_ConfigureEndpoints(&Mouse_HID_Interface)))
 174           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 175
 176         USB_Device_EnableSOFEvents();
 177 }
 178
 179 /** Event handler for the library USB Unhandled Control Request event. */
 180 void EVENT_USB_Device_UnhandledControlRequest(void)
 181 {
 182         CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 183         HID_Device_ProcessControlRequest(&Mouse_HID_Interface);
 184 }
 185
 186 /** Event handler for the USB device Start Of Frame event. */
 187 void EVENT_USB_Device_StartOfFrame(void)
 188 {
 189         HID_Device_MillisecondElapsed(&Mouse_HID_Interface);
 190 }
 191
 192 /** HID class driver callback function for the creation of HID reports to the host.
 193  *
 194  *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 195  *  \param[in,out] ReportID  Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
 196  *  \param[in] ReportType  Type of the report to create, either REPORT_ITEM_TYPE_In or REPORT_ITEM_TYPE_Feature
 197  *  \param[out] ReportData  Pointer to a buffer where the created report should be stored
 198  *  \param[out] ReportSize  Number of bytes written in the report (or zero if no report is to be sent
 199  *
 200  *  \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
 201  */
 202 bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
 203                                          const uint8_t ReportType, void* ReportData, uint16_t* ReportSize)
 204 {
 205         USB_MouseReport_Data_t* MouseReport = (USB_MouseReport_Data_t*)ReportData;
 206
 207         uint8_t JoyStatus_LCL    = Joystick_GetStatus();
 208         uint8_t ButtonStatus_LCL = Buttons_GetStatus();
 209
 210         if (JoyStatus_LCL & JOY_UP)
 211           MouseReport->Y = -1;
 212         else if (JoyStatus_LCL & JOY_DOWN)
 213           MouseReport->Y =  1;
 214
 215         if (JoyStatus_LCL & JOY_LEFT)
 216           MouseReport->X = -1;
 217         else if (JoyStatus_LCL & JOY_RIGHT)
 218           MouseReport->X =  1;
 219
 220         if (JoyStatus_LCL & JOY_PRESS)
 221           MouseReport->Button |= (1 << 0);
 222
 223         if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 224           MouseReport->Button |= (1 << 1);
 225
 226         *ReportSize = sizeof(USB_MouseReport_Data_t);
 227         return true;
 228 }
 229
 230 /** HID class driver callback function for the processing of HID reports from the host.
 231  *
 232  *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 233  *  \param[in] ReportID    Report ID of the received report from the host
 234  *  \param[in] ReportType  The type of report that the host has sent, either REPORT_ITEM_TYPE_Out or REPORT_ITEM_TYPE_Feature
 235  *  \param[in] ReportData  Pointer to a buffer where the created report has been stored
 236  *  \param[in] ReportSize  Size in bytes of the received HID report
 237  */
 238 void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID,
 239                                           const uint8_t ReportType, const void* ReportData, const uint16_t ReportSize)
 240 {
 241         // Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports
 242 }