Demos/Host/LowLevel/MouseHost/MouseHost.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 MouseHost demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "MouseHost.h"
  38
  39 /** Main program entry point. This routine configures the hardware required by the application, then
  40  *  enters a loop to run the application tasks in sequence.
  41  */
  42 int main(void)
  43 {
  44         SetupHardware();
  45
  46         puts_P(PSTR(ESC_FG_CYAN "Mouse HID Host Demo running.\r\n" ESC_FG_WHITE));
  47
  48         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  49
  50         for (;;)
  51         {
  52                 Mouse_HID_Task();
  53                 USB_USBTask();
  54         }
  55 }
  56
  57 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  58 void SetupHardware(void)
  59 {
  60         /* Disable watchdog if enabled by bootloader/fuses */
  61         MCUSR &= ~(1 << WDRF);
  62         wdt_disable();
  63
  64         /* Disable clock division */
  65         clock_prescale_set(clock_div_1);
  66
  67         /* Hardware Initialization */
  68         SerialStream_Init(9600, false);
  69         LEDs_Init();
  70         USB_Init();
  71 }
  72
  73 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  74  *  starts the library USB task to begin the enumeration and USB management process.
  75  */
  76 void EVENT_USB_Host_DeviceAttached(void)
  77 {
  78         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
  79         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  80 }
  81
  82 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  83  *  stops the library USB task management process.
  84  */
  85 void EVENT_USB_Host_DeviceUnattached(void)
  86 {
  87         puts_P(PSTR(ESC_FG_GREEN "Device Unattached.\r\n" ESC_FG_WHITE));
  88         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  89 }
  90
  91 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
  92  *  enumerated by the host and is now ready to be used by the application.
  93  */
  94 void EVENT_USB_Host_DeviceEnumerationComplete(void)
  95 {
  96         LEDs_SetAllLEDs(LEDMASK_USB_READY);
  97 }
  98
  99 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 100 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 101 {
 102         USB_ShutDown();
 103
 104         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 105                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 106
 107         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 108         for(;;);
 109 }
 110
 111 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 112  *  enumerating an attached USB device.
 113  */
 114 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
 115 {
 116         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 117                                  " -- Error Code %d\r\n"
 118                                  " -- Sub Error Code %d\r\n"
 119                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 120
 121         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 122 }
 123
 124 /** Reads in and processes the next report from the attached device, displaying the report
 125  *  contents on the board LEDs and via the serial port.
 126  */
 127 void ReadNextReport(void)
 128 {
 129         USB_MouseReport_Data_t MouseReport;
 130         uint8_t                LEDMask = LEDS_NO_LEDS;
 131
 132         /* Select mouse data pipe */
 133         Pipe_SelectPipe(MOUSE_DATAPIPE);
 134
 135         /* Unfreeze keyboard data pipe */
 136         Pipe_Unfreeze();
 137
 138         /* Check to see if a packet has been received */
 139         if (!(Pipe_IsINReceived()))
 140         {
 141                 /* No packet received (no movement), turn off LEDs */
 142                 LEDs_SetAllLEDs(LEDS_NO_LEDS);
 143
 144                 /* Refreeze HID data IN pipe */
 145                 Pipe_Freeze();
 146
 147                 return;
 148         }
 149
 150         /* Ensure pipe contains data before trying to read from it */
 151         if (Pipe_IsReadWriteAllowed())
 152         {
 153                 /* Read in mouse report data */
 154                 Pipe_Read_Stream_LE(&MouseReport, sizeof(MouseReport));
 155
 156                 /* Alter status LEDs according to mouse X movement */
 157                 if (MouseReport.X > 0)
 158                   LEDMask |= LEDS_LED1;
 159                 else if (MouseReport.X < 0)
 160                   LEDMask |= LEDS_LED2;
 161
 162                 /* Alter status LEDs according to mouse Y movement */
 163                 if (MouseReport.Y > 0)
 164                   LEDMask |= LEDS_LED3;
 165                 else if (MouseReport.Y < 0)
 166                   LEDMask |= LEDS_LED4;
 167
 168                 /* Alter status LEDs according to mouse button position */
 169                 if (MouseReport.Button)
 170                   LEDMask  = LEDS_ALL_LEDS;
 171
 172                 LEDs_SetAllLEDs(LEDMask);
 173
 174                 /* Print mouse report data through the serial port */
 175                 printf_P(PSTR("dX:%2d dY:%2d Button:%d\r\n"), MouseReport.X,
 176                                                                                                           MouseReport.Y,
 177                                                                                                           MouseReport.Button);
 178         }
 179
 180         /* Clear the IN endpoint, ready for next data packet */
 181         Pipe_ClearIN();
 182
 183         /* Refreeze mouse data pipe */
 184         Pipe_Freeze();
 185 }
 186
 187 /** Task to set the configuration of the attached device after it has been enumerated, and to read and process
 188  *  HID reports from the device and display the results onto the board LEDs.
 189  */
 190 void Mouse_HID_Task(void)
 191 {
 192         uint8_t ErrorCode;
 193
 194         /* Switch to determine what user-application handled host state the host state machine is in */
 195         switch (USB_HostState)
 196         {
 197                 case HOST_STATE_Addressed:
 198                         puts_P(PSTR("Getting Config Data.\r\n"));
 199
 200                         /* Get and process the configuration descriptor data */
 201                         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 202                         {
 203                                 if (ErrorCode == ControlError)
 204                                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 205                                 else
 206                                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 207
 208                                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 209
 210                                 /* Indicate error status */
 211                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 212
 213                                 /* Wait until USB device disconnected */
 214                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 215                                 break;
 216                         }
 217
 218                         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 219                         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 220                         {
 221                                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 222                                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 223
 224                                 /* Indicate error status */
 225                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 226
 227                                 /* Wait until USB device disconnected */
 228                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 229                                 break;
 230                         }
 231
 232                         /* HID class request to set the mouse protocol to the Boot Protocol */
 233                         USB_ControlRequest = (USB_Request_Header_t)
 234                                 {
 235                                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
 236                                         .bRequest      = REQ_SetProtocol,
 237                                         .wValue        = 0,
 238                                         .wIndex        = 0,
 239                                         .wLength       = 0,
 240                                 };
 241
 242                         /* Select the control pipe for the request transfer */
 243                         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 244
 245                         /* Send the request, display error and wait for device detach if request fails */
 246                         if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
 247                         {
 248                                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Protocol).\r\n"
 249                                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 250
 251                                 /* Indicate error status */
 252                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 253
 254                                 /* Wait until USB device disconnected */
 255                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 256                                 break;
 257                         }
 258
 259                         puts_P(PSTR("Mouse Enumerated.\r\n"));
 260
 261                         USB_HostState = HOST_STATE_Configured;
 262                         break;
 263                 case HOST_STATE_Configured:
 264                         /* If a report has been received, read and process it */
 265                         ReadNextReport();
 266
 267                         break;
 268         }
 269 }