Demos/Device/ClassDriver/Joystick/Joystick.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 Joystick demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "Joystick.h"
  38
  39 /** Buffer to hold the previously generated HID report, for comparison purposes inside the HID class driver. */
  40 uint8_t PrevJoystickHIDReportBuffer[sizeof(USB_JoystickReport_Data_t)];
  41
  42 /** LUFA HID Class driver interface configuration and state information. This structure is
  43  *  passed to all HID Class driver functions, so that multiple instances of the same class
  44  *  within a device can be differentiated from one another.
  45  */
  46 USB_ClassInfo_HID_Device_t Joystick_HID_Interface =
  47         {
  48                 .Config =
  49                         {
  50                                 .InterfaceNumber         = 0,
  51
  52                                 .ReportINEndpointNumber  = JOYSTICK_EPNUM,
  53                                 .ReportINEndpointSize    = JOYSTICK_EPSIZE,
  54
  55                                 .PrevReportINBuffer      = PrevJoystickHIDReportBuffer,
  56                                 .PrevReportINBufferSize  = sizeof(PrevJoystickHIDReportBuffer),
  57                         },
  58         };
  59
  60 /** Main program entry point. This routine contains the overall program flow, including initial
  61  *  setup of all components and the main program loop.
  62  */
  63 int main(void)
  64 {
  65         SetupHardware();
  66
  67         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  68
  69         for (;;)
  70         {
  71                 HID_Device_USBTask(&Joystick_HID_Interface);
  72                 USB_USBTask();
  73         }
  74 }
  75
  76 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  77 void SetupHardware(void)
  78 {
  79         /* Disable watchdog if enabled by bootloader/fuses */
  80         MCUSR &= ~(1 << WDRF);
  81         wdt_disable();
  82
  83         /* Disable clock division */
  84         clock_prescale_set(clock_div_1);
  85
  86         /* Hardware Initialization */
  87         Joystick_Init();
  88         LEDs_Init();
  89         Buttons_Init();
  90         USB_Init();
  91 }
  92
  93 /** Event handler for the library USB Connection event. */
  94 void EVENT_USB_Device_Connect(void)
  95 {
  96         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  97 }
  98
  99 /** Event handler for the library USB Disconnection event. */
 100 void EVENT_USB_Device_Disconnect(void)
 101 {
 102         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 103 }
 104
 105 /** Event handler for the library USB Configuration Changed event. */
 106 void EVENT_USB_Device_ConfigurationChanged(void)
 107 {
 108         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 109
 110         if (!(HID_Device_ConfigureEndpoints(&Joystick_HID_Interface)))
 111           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 112
 113         USB_Device_EnableSOFEvents();
 114 }
 115
 116 /** Event handler for the library USB Unhandled Control Request event. */
 117 void EVENT_USB_Device_UnhandledControlRequest(void)
 118 {
 119         HID_Device_ProcessControlRequest(&Joystick_HID_Interface);
 120 }
 121
 122 /** Event handler for the USB device Start Of Frame event. */
 123 void EVENT_USB_Device_StartOfFrame(void)
 124 {
 125         HID_Device_MillisecondElapsed(&Joystick_HID_Interface);
 126 }
 127
 128 /** HID class driver callback function for the creation of HID reports to the host.
 129  *
 130  *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 131  *  \param[in,out] ReportID  Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
 132  *  \param[out] ReportData  Pointer to a buffer where the created report should be stored
 133  *  \param[out] ReportSize  Number of bytes written in the report (or zero if no report is to be sent
 134  *
 135  *  \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
 136  */
 137 bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
 138                                          void* ReportData, uint16_t* ReportSize)
 139 {
 140         USB_JoystickReport_Data_t* JoystickReport = (USB_JoystickReport_Data_t*)ReportData;
 141
 142         uint8_t JoyStatus_LCL    = Joystick_GetStatus();
 143         uint8_t ButtonStatus_LCL = Buttons_GetStatus();
 144
 145         if (JoyStatus_LCL & JOY_UP)
 146           JoystickReport->Y = -100;
 147         else if (JoyStatus_LCL & JOY_DOWN)
 148           JoystickReport->Y =  100;
 149
 150         if (JoyStatus_LCL & JOY_RIGHT)
 151           JoystickReport->X =  100;
 152         else if (JoyStatus_LCL & JOY_LEFT)
 153           JoystickReport->X = -100;
 154
 155         if (JoyStatus_LCL & JOY_PRESS)
 156           JoystickReport->Button  = (1 << 1);
 157
 158         if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 159           JoystickReport->Button |= (1 << 0);
 160
 161         *ReportSize = sizeof(USB_JoystickReport_Data_t);
 162         return false;
 163 }
 164
 165 /** HID class driver callback function for the processing of HID reports from the host.
 166  *
 167  *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 168  *  \param[in] ReportID  Report ID of the received report from the host
 169  *  \param[in] ReportData  Pointer to a buffer where the created report has been stored
 170  *  \param[in] ReportSize  Size in bytes of the received HID report
 171  */
 172 void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID,
 173                                           const void* ReportData, const uint16_t ReportSize)
 174 {
 175         // Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports
 176 }