Demos/Host/MouseHostWithParser/MouseHostWithParser.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 MouseHostWithParser demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "MouseHostWithParser.h"
  38
  39 /* Scheduler Task List */
  40 TASK_LIST
  41 {
  42         { Task: USB_USBTask          , TaskStatus: TASK_STOP },
  43         { Task: USB_Mouse_Host       , TaskStatus: TASK_STOP },
  44 };
  45
  46
  47 /** Main program entry point. This routine configures the hardware required by the application, then
  48  *  starts the scheduler to run the application tasks.
  49  */
  50 int main(void)
  51 {
  52         /* Disable watchdog if enabled by bootloader/fuses */
  53         MCUSR &= ~(1 << WDRF);
  54         wdt_disable();
  55
  56         /* Disable clock division */
  57         clock_prescale_set(clock_div_1);
  58
  59         /* Hardware Initialization */
  60         SerialStream_Init(9600, false);
  61         LEDs_Init();
  62
  63         /* Indicate USB not ready */
  64         UpdateStatus(Status_USBNotReady);
  65
  66         /* Initialize Scheduler so that it can be used */
  67         Scheduler_Init();
  68
  69         /* Initialize USB Subsystem */
  70         USB_Init();
  71
  72         /* Start-up message */
  73         puts_P(PSTR(ESC_RESET ESC_BG_WHITE ESC_INVERSE_ON ESC_ERASE_DISPLAY
  74                "Mouse Host Demo running.\r\n" ESC_INVERSE_OFF));
  75
  76         /* Scheduling - routine never returns, so put this last in the main function */
  77         Scheduler_Start();
  78 }
  79
  80 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  81  *  starts the library USB task to begin the enumeration and USB management process.
  82  */
  83 EVENT_HANDLER(USB_DeviceAttached)
  84 {
  85         puts_P(PSTR("Device Attached.\r\n"));
  86         UpdateStatus(Status_USBEnumerating);
  87
  88         /* Start USB management task to enumerate the device */
  89         Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);
  90 }
  91
  92 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  93  *  stops the library USB task management process.
  94  */
  95 EVENT_HANDLER(USB_DeviceUnattached)
  96 {
  97         /* Stop mouse and USB management task */
  98         Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
  99         Scheduler_SetTaskMode(USB_Mouse_Host, TASK_STOP);
 100
 101         puts_P(PSTR("Device Unattached.\r\n"));
 102         UpdateStatus(Status_USBNotReady);
 103 }
 104
 105 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 106  *  enumerated by the host and is now ready to be used by the application.
 107  */
 108 EVENT_HANDLER(USB_DeviceEnumerationComplete)
 109 {
 110         /* Start Mouse Host task */
 111         Scheduler_SetTaskMode(USB_Mouse_Host, TASK_RUN);
 112
 113         /* Indicate device enumeration complete */
 114         UpdateStatus(Status_USBReady);
 115 }
 116
 117 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 118 EVENT_HANDLER(USB_HostError)
 119 {
 120         USB_ShutDown();
 121
 122         puts_P(PSTR(ESC_BG_RED "Host Mode Error\r\n"));
 123         printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
 124
 125         UpdateStatus(Status_HardwareError);
 126         for(;;);
 127 }
 128
 129 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 130  *  enumerating an attached USB device.
 131  */
 132 EVENT_HANDLER(USB_DeviceEnumerationFailed)
 133 {
 134         puts_P(PSTR(ESC_BG_RED "Dev Enum Error\r\n"));
 135         printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
 136         printf_P(PSTR(" -- Sub Error Code %d\r\n"), SubErrorCode);
 137         printf_P(PSTR(" -- In State %d\r\n"), USB_HostState);
 138
 139         UpdateStatus(Status_EnumerationError);
 140 }
 141
 142 /** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to
 143  *  log to a serial port, or anything else that is suitable for status updates.
 144  *
 145  *  \param CurrentStatus  Current status of the system, from the MouseHostWithParser_StatusCodes_t enum
 146  */
 147 void UpdateStatus(uint8_t CurrentStatus)
 148 {
 149         uint8_t LEDMask = LEDS_NO_LEDS;
 150
 151         /* Set the LED mask to the appropriate LED mask based on the given status code */
 152         switch (CurrentStatus)
 153         {
 154                 case Status_USBNotReady:
 155                         LEDMask = (LEDS_LED1);
 156                         break;
 157                 case Status_USBEnumerating:
 158                         LEDMask = (LEDS_LED1 | LEDS_LED2);
 159                         break;
 160                 case Status_USBReady:
 161                         LEDMask = (LEDS_LED2);
 162                         break;
 163                 case Status_EnumerationError:
 164                 case Status_HardwareError:
 165                         LEDMask = (LEDS_LED1 | LEDS_LED3);
 166                         break;
 167                 case Status_Busy:
 168                         LEDMask = (LEDS_LED1 | LEDS_LED4);
 169                         break;
 170         }
 171
 172         /* Set the board LEDs to the new LED mask */
 173         LEDs_SetAllLEDs(LEDMask);
 174 }
 175
 176 /** Task to set the configuration of the attached device after it has been enumerated, and to read and process
 177  *  the HID report descriptor and HID reports from the device and display the results onto the board LEDs.
 178  */
 179 TASK(USB_Mouse_Host)
 180 {
 181         uint8_t ErrorCode;
 182
 183         /* Switch to determine what user-application handled host state the host state machine is in */
 184         switch (USB_HostState)
 185         {
 186                 case HOST_STATE_Addressed:
 187                         /* Standard request to set the device configuration to configuration 1 */
 188                         USB_HostRequest = (USB_Host_Request_Header_t)
 189                                 {
 190                                         bmRequestType: (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
 191                                         bRequest:      REQ_SetConfiguration,
 192                                         wValue:        1,
 193                                         wIndex:        0,
 194                                         wLength:       0,
 195                                 };
 196
 197                         /* Select the control pipe for the request transfer */
 198                         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 199
 200                         /* Send the request, display error and wait for device detach if request fails */
 201                         if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
 202                         {
 203                                 puts_P(PSTR("Control Error (Set Configuration).\r\n"));
 204                                 printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
 205
 206                                 /* Indicate error via status LEDs */
 207                                 UpdateStatus(Status_EnumerationError);
 208
 209                                 /* Wait until USB device disconnected */
 210                                 while (USB_IsConnected);
 211                                 break;
 212                         }
 213
 214                         USB_HostState = HOST_STATE_Configured;
 215                         break;
 216                 case HOST_STATE_Configured:
 217                         puts_P(PSTR("Getting Config Data.\r\n"));
 218
 219                         /* Get and process the configuration descriptor data */
 220                         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 221                         {
 222                                 if (ErrorCode == ControlError)
 223                                   puts_P(PSTR("Control Error (Get Configuration).\r\n"));
 224                                 else
 225                                   puts_P(PSTR("Invalid Device.\r\n"));
 226
 227                                 printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
 228
 229                                 /* Indicate error via status LEDs */
 230                                 UpdateStatus(Status_EnumerationError);
 231
 232                                 /* Wait until USB device disconnected */
 233                                 while (USB_IsConnected);
 234                                 break;
 235                         }
 236
 237                         puts_P(PSTR("Processing HID Report.\r\n"));
 238
 239                         /* LEDs one and two on to indicate busy processing */
 240                         UpdateStatus(Status_Busy);
 241
 242                         /* Get and process the device's first HID report descriptor */
 243                         if ((ErrorCode = GetHIDReportData()) != ParseSuccessful)
 244                         {
 245                                 puts_P(PSTR("Report Parse Error.\r\n"));
 246                                 printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
 247
 248                                 /* Indicate error via status LEDs */
 249                                 UpdateStatus(Status_EnumerationError);
 250
 251                                 /* Wait until USB device disconnected */
 252                                 while (USB_IsConnected);
 253                                 break;
 254                         }
 255
 256                         /* All LEDs off - ready to indicate key presses */
 257                         UpdateStatus(Status_USBReady);
 258
 259                         puts_P(PSTR("Mouse Enumerated.\r\n"));
 260
 261                         USB_HostState = HOST_STATE_Ready;
 262                         break;
 263                 case HOST_STATE_Ready:
 264                         /* Select and unfreeze mouse data pipe */
 265                         Pipe_SelectPipe(MOUSE_DATAPIPE);
 266                         Pipe_Unfreeze();
 267
 268                         /* Check to see if a packet has been received */
 269                         if (Pipe_IsINReceived())
 270                         {
 271                                 /* Check if data has been received from the attached mouse */
 272                                 if (Pipe_IsReadWriteAllowed())
 273                                 {
 274                                         /* Create buffer big enough for the report */
 275                                         uint8_t MouseReport[Pipe_BytesInPipe()];
 276
 277                                         /* Load in the mouse report */
 278                                         Pipe_Read_Stream_LE(MouseReport, Pipe_BytesInPipe());
 279
 280                                         /* Process the read in mouse report from the device */
 281                                         ProcessMouseReport(MouseReport);
 282                                 }
 283
 284                                 /* Clear the IN endpoint, ready for next data packet */
 285                                 Pipe_ClearIN();
 286                         }
 287
 288                         /* Freeze mouse data pipe */
 289                         Pipe_Freeze();
 290                         break;
 291         }
 292 }
 293
 294 /** Processes a read HID report from an attached mouse, extracting out elements via the HID parser results
 295  *  as required and displays movement and button presses on the board LEDs.
 296  *
 297  *  \param MouseReport  Pointer to a HID report from an attached mouse device
 298  */
 299 void ProcessMouseReport(uint8_t* MouseReport)
 300 {
 301         uint8_t LEDMask = LEDS_NO_LEDS;
 302
 303         /* Check each HID report item in turn, looking for mouse X/Y/button reports */
 304         for (uint8_t ReportNumber = 0; ReportNumber < HIDReportInfo.TotalReportItems; ReportNumber++)
 305         {
 306                 /* Create a temporary item pointer to the next report item */
 307                 HID_ReportItem_t* ReportItem = &HIDReportInfo.ReportItems[ReportNumber];
 308
 309                 bool FoundData;
 310
 311                 if ((ReportItem->Attributes.Usage.Page       == USAGE_PAGE_BUTTON) &&
 312                         (ReportItem->ItemType                    == REPORT_ITEM_TYPE_In))
 313                 {
 314                         /* Get the mouse button value */
 315                         FoundData = USB_GetHIDReportItemInfo(MouseReport, ReportItem);
 316
 317                         /* For multi-report devices - if the requested data was not in the issued report, continue */
 318                         if (!(FoundData))
 319                           continue;
 320
 321                         /* If button is pressed, all LEDs are turned on */
 322                         if (ReportItem->Value)
 323                           LEDMask = LEDS_ALL_LEDS;
 324                 }
 325                 else if ((ReportItem->Attributes.Usage.Page   == USAGE_PAGE_GENERIC_DCTRL) &&
 326                                  ((ReportItem->Attributes.Usage.Usage == USAGE_X)                  ||
 327                                   (ReportItem->Attributes.Usage.Usage == USAGE_Y))                 &&
 328                                  (ReportItem->ItemType                == REPORT_ITEM_TYPE_In))
 329                 {
 330                         /* Get the mouse relative position value */
 331                         FoundData = USB_GetHIDReportItemInfo(MouseReport, ReportItem);
 332
 333                         /* For multi-report devices - if the requested data was not in the issued report, continue */
 334                         if (!(FoundData))
 335                           continue;
 336
 337                         int16_t DeltaMovement;
 338
 339                         if (ReportItem->Attributes.BitSize > 8)
 340                           DeltaMovement = (int16_t)ReportItem->Value;
 341                         else
 342                           DeltaMovement = (int8_t)ReportItem->Value;
 343
 344                         /* Determine if the report is for the X or Y delta movement */
 345                         if (ReportItem->Attributes.Usage.Usage == USAGE_X)
 346                         {
 347                                 /* Turn on the appropriate LED according to direction if the delta is non-zero */
 348                                 if (DeltaMovement)
 349                                   LEDMask |= ((DeltaMovement > 0) ? LEDS_LED1 : LEDS_LED2);
 350                         }
 351                         else
 352                         {
 353                                 /* Turn on the appropriate LED according to direction if the delta is non-zero */
 354                                 if (DeltaMovement)
 355                                   LEDMask |= ((DeltaMovement > 0) ? LEDS_LED3 : LEDS_LED4);
 356                         }
 357                 }
 358         }
 359
 360         /* Display the button information on the board LEDs */
 361         LEDs_SetAllLEDs(LEDMask);
 362 }