Demos/Device/LowLevel/KeyboardMouse/KeyboardMouse.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11   Copyright 2010  Denver Gingerich (denver [at] ossguy [dot] com)
  12
  13   Permission to use, copy, modify, distribute, and sell this
  14   software and its documentation for any purpose is hereby granted
  15   without fee, provided that the above copyright notice appear in
  16   all copies and that both that the copyright notice and this
  17   permission notice and warranty disclaimer appear in supporting
  18   documentation, and that the name of the author not be used in
  19   advertising or publicity pertaining to distribution of the
  20   software without specific, written prior permission.
  21
  22   The author disclaims all warranties with regard to this
  23   software, including all implied warranties of merchantability
  24   and fitness.  In no event shall the author be liable for any
  25   special, indirect or consequential damages or any damages
  26   whatsoever resulting from loss of use, data or profits, whether
  27   in an action of contract, negligence or other tortious action,
  28   arising out of or in connection with the use or performance of
  29   this software.
  30 */
  31
  32 /** \file
  33  *
  34  *  Main source file for the KeyboardMouse demo. This file contains the main tasks of the demo and
  35  *  is responsible for the initial application hardware configuration.
  36  */
  37
  38 #include "KeyboardMouse.h"
  39
  40 /** Global structure to hold the current keyboard interface HID report, for transmission to the host */
  41 static USB_KeyboardReport_Data_t KeyboardReportData;
  42
  43 /** Global structure to hold the current mouse interface HID report, for transmission to the host */
  44 static USB_MouseReport_Data_t MouseReportData;
  45
  46
  47 /** Main program entry point. This routine configures the hardware required by the application, then
  48  *  enters a loop to run the application tasks in sequence.
  49  */
  50 int main(void)
  51 {
  52         SetupHardware();
  53
  54         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  55         GlobalInterruptEnable();
  56
  57         for (;;)
  58         {
  59                 Keyboard_HID_Task();
  60                 Mouse_HID_Task();
  61                 USB_USBTask();
  62         }
  63 }
  64
  65 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  66 void SetupHardware(void)
  67 {
  68         /* Disable watchdog if enabled by bootloader/fuses */
  69         MCUSR &= ~(1 << WDRF);
  70         wdt_disable();
  71
  72         /* Disable clock division */
  73         clock_prescale_set(clock_div_1);
  74
  75         /* Hardware Initialization */
  76         Joystick_Init();
  77         LEDs_Init();
  78         USB_Init();
  79 }
  80
  81 /** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
  82  *  starts the library USB task to begin the enumeration and USB management process.
  83  */
  84 void EVENT_USB_Device_Connect(void)
  85 {
  86         /* Indicate USB enumerating */
  87         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  88 }
  89
  90 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
  91  *  the status LEDs and stops the USB management task.
  92  */
  93 void EVENT_USB_Device_Disconnect(void)
  94 {
  95         /* Indicate USB not ready */
  96         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  97 }
  98
  99 /** Event handler for the USB_ConfigurationChanged event. This is fired when the host sets the current configuration
 100  *  of the USB device after enumeration, and configures the keyboard and mouse device endpoints.
 101  */
 102 void EVENT_USB_Device_ConfigurationChanged(void)
 103 {
 104         bool ConfigSuccess = true;
 105
 106         /* Setup Keyboard HID Report Endpoints */
 107         ConfigSuccess &= Endpoint_ConfigureEndpoint(KEYBOARD_IN_EPADDR, EP_TYPE_INTERRUPT, HID_EPSIZE, 1);
 108         ConfigSuccess &= Endpoint_ConfigureEndpoint(KEYBOARD_OUT_EPADDR, EP_TYPE_INTERRUPT, HID_EPSIZE, 1);
 109
 110         /* Setup Mouse HID Report Endpoint */
 111         ConfigSuccess &= Endpoint_ConfigureEndpoint(MOUSE_IN_EPADDR, EP_TYPE_INTERRUPT, HID_EPSIZE, 1);
 112
 113         /* Indicate endpoint configuration success or failure */
 114         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 115 }
 116
 117 /** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
 118  *  the device from the USB host before passing along unhandled control requests to the library for processing
 119  *  internally.
 120  */
 121 void EVENT_USB_Device_ControlRequest(void)
 122 {
 123         uint8_t* ReportData;
 124         uint8_t  ReportSize;
 125
 126         /* Handle HID Class specific requests */
 127         switch (USB_ControlRequest.bRequest)
 128         {
 129                 case HID_REQ_GetReport:
 130                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
 131                         {
 132                                 Endpoint_ClearSETUP();
 133
 134                                 /* Determine if it is the mouse or the keyboard data that is being requested */
 135                                 if (!(USB_ControlRequest.wIndex))
 136                                 {
 137                                         ReportData = (uint8_t*)&KeyboardReportData;
 138                                         ReportSize = sizeof(KeyboardReportData);
 139                                 }
 140                                 else
 141                                 {
 142                                         ReportData = (uint8_t*)&MouseReportData;
 143                                         ReportSize = sizeof(MouseReportData);
 144                                 }
 145
 146                                 /* Write the report data to the control endpoint */
 147                                 Endpoint_Write_Control_Stream_LE(ReportData, ReportSize);
 148                                 Endpoint_ClearOUT();
 149
 150                                 /* Clear the report data afterwards */
 151                                 memset(ReportData, 0, ReportSize);
 152                         }
 153
 154                         break;
 155                 case HID_REQ_SetReport:
 156                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
 157                         {
 158                                 Endpoint_ClearSETUP();
 159
 160                                 /* Wait until the LED report has been sent by the host */
 161                                 while (!(Endpoint_IsOUTReceived()))
 162                                 {
 163                                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 164                                           return;
 165                                 }
 166
 167                                 /* Read in the LED report from the host */
 168                                 uint8_t LEDStatus = Endpoint_Read_8();
 169
 170                                 Endpoint_ClearOUT();
 171                                 Endpoint_ClearStatusStage();
 172
 173                                 /* Process the incoming LED report */
 174                                 Keyboard_ProcessLEDReport(LEDStatus);
 175                         }
 176
 177                         break;
 178         }
 179 }
 180
 181 /** Processes a given Keyboard LED report from the host, and sets the board LEDs to match. Since the Keyboard
 182  *  LED report can be sent through either the control endpoint (via a HID SetReport request) or the HID OUT
 183  *  endpoint, the processing code is placed here to avoid duplicating it and potentially having different
 184  *  behavior depending on the method used to sent it.
 185  */
 186 void Keyboard_ProcessLEDReport(const uint8_t LEDStatus)
 187 {
 188         uint8_t LEDMask = LEDS_LED2;
 189
 190         if (LEDStatus & HID_KEYBOARD_LED_NUMLOCK)
 191           LEDMask |= LEDS_LED1;
 192
 193         if (LEDStatus & HID_KEYBOARD_LED_CAPSLOCK)
 194           LEDMask |= LEDS_LED3;
 195
 196         if (LEDStatus & HID_KEYBOARD_LED_SCROLLLOCK)
 197           LEDMask |= LEDS_LED4;
 198
 199         /* Set the status LEDs to the current Keyboard LED status */
 200         LEDs_SetAllLEDs(LEDMask);
 201 }
 202
 203 /** Keyboard task. This generates the next keyboard HID report for the host, and transmits it via the
 204  *  keyboard IN endpoint when the host is ready for more data. Additionally, it processes host LED status
 205  *  reports sent to the device via the keyboard OUT reporting endpoint.
 206  */
 207 void Keyboard_HID_Task(void)
 208 {
 209         uint8_t JoyStatus_LCL = Joystick_GetStatus();
 210
 211         /* Device must be connected and configured for the task to run */
 212         if (USB_DeviceState != DEVICE_STATE_Configured)
 213           return;
 214
 215         /* Check if board button is not pressed, if so mouse mode enabled */
 216         if (!(Buttons_GetStatus() & BUTTONS_BUTTON1))
 217         {
 218                 /* Make sent key uppercase by indicating that the left shift key is pressed */
 219                 KeyboardReportData.Modifier = HID_KEYBOARD_MODIFIER_LEFTSHIFT;
 220
 221                 if (JoyStatus_LCL & JOY_UP)
 222                   KeyboardReportData.KeyCode[0] = HID_KEYBOARD_SC_A;
 223                 else if (JoyStatus_LCL & JOY_DOWN)
 224                   KeyboardReportData.KeyCode[0] = HID_KEYBOARD_SC_B;
 225
 226                 if (JoyStatus_LCL & JOY_LEFT)
 227                   KeyboardReportData.KeyCode[0] = HID_KEYBOARD_SC_C;
 228                 else if (JoyStatus_LCL & JOY_RIGHT)
 229                   KeyboardReportData.KeyCode[0] = HID_KEYBOARD_SC_D;
 230
 231                 if (JoyStatus_LCL & JOY_PRESS)
 232                   KeyboardReportData.KeyCode[0] = HID_KEYBOARD_SC_E;
 233         }
 234
 235         /* Select the Keyboard Report Endpoint */
 236         Endpoint_SelectEndpoint(KEYBOARD_IN_EPADDR);
 237
 238         /* Check if Keyboard Endpoint Ready for Read/Write */
 239         if (Endpoint_IsReadWriteAllowed())
 240         {
 241                 /* Write Keyboard Report Data */
 242                 Endpoint_Write_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData), NULL);
 243
 244                 /* Finalize the stream transfer to send the last packet */
 245                 Endpoint_ClearIN();
 246
 247                 /* Clear the report data afterwards */
 248                 memset(&KeyboardReportData, 0, sizeof(KeyboardReportData));
 249         }
 250
 251         /* Select the Keyboard LED Report Endpoint */
 252         Endpoint_SelectEndpoint(KEYBOARD_OUT_EPADDR);
 253
 254         /* Check if Keyboard LED Endpoint Ready for Read/Write */
 255         if (Endpoint_IsReadWriteAllowed())
 256         {
 257                 /* Read in and process the LED report from the host */
 258                 Keyboard_ProcessLEDReport(Endpoint_Read_8());
 259
 260                 /* Handshake the OUT Endpoint - clear endpoint and ready for next report */
 261                 Endpoint_ClearOUT();
 262         }
 263 }
 264
 265 /** Mouse task. This generates the next mouse HID report for the host, and transmits it via the
 266  *  mouse IN endpoint when the host is ready for more data.
 267  */
 268 void Mouse_HID_Task(void)
 269 {
 270         uint8_t JoyStatus_LCL = Joystick_GetStatus();
 271
 272         /* Device must be connected and configured for the task to run */
 273         if (USB_DeviceState != DEVICE_STATE_Configured)
 274           return;
 275
 276         /* Check if board button is pressed, if so mouse mode enabled */
 277         if (Buttons_GetStatus() & BUTTONS_BUTTON1)
 278         {
 279                 if (JoyStatus_LCL & JOY_UP)
 280                   MouseReportData.Y =  1;
 281                 else if (JoyStatus_LCL & JOY_DOWN)
 282                   MouseReportData.Y = -1;
 283
 284                 if (JoyStatus_LCL & JOY_RIGHT)
 285                   MouseReportData.X =  1;
 286                 else if (JoyStatus_LCL & JOY_LEFT)
 287                   MouseReportData.X = -1;
 288
 289                 if (JoyStatus_LCL & JOY_PRESS)
 290                   MouseReportData.Button |= (1 << 0);
 291         }
 292
 293         /* Select the Mouse Report Endpoint */
 294         Endpoint_SelectEndpoint(MOUSE_IN_EPADDR);
 295
 296         /* Check if Mouse Endpoint Ready for Read/Write */
 297         if (Endpoint_IsReadWriteAllowed())
 298         {
 299                 /* Write Mouse Report Data */
 300                 Endpoint_Write_Stream_LE(&MouseReportData, sizeof(MouseReportData), NULL);
 301
 302                 /* Finalize the stream transfer to send the last packet */
 303                 Endpoint_ClearIN();
 304
 305                 /* Clear the report data afterwards */
 306                 memset(&MouseReportData, 0, sizeof(MouseReportData));
 307         }
 308 }
 309