Demos/Device/Mouse/Mouse.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 Mouse demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "Mouse.h"
  38
  39 /** LUFA HID Class driver interface configuration and state information. This structure is
  40  *  passed to all HID 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_HID_t Mouse_HID_Interface =
  44         {
  45                 .InterfaceNumber         = 0,
  46
  47                 .ReportINEndpointNumber  = MOUSE_EPNUM,
  48                 .ReportINEndpointSize    = MOUSE_EPSIZE,
  49
  50                 .ReportINBufferSize      = sizeof(USB_MouseReport_Data_t),
  51         };
  52
  53 /** Main program entry point. This routine contains the overall program flow, including initial
  54  *  setup of all components and the main program loop.
  55  */
  56 int main(void)
  57 {
  58         SetupHardware();
  59
  60         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  61
  62         for (;;)
  63         {
  64                 USB_HID_USBTask(&Mouse_HID_Interface);
  65                 USB_USBTask();
  66         }
  67 }
  68
  69 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  70 void SetupHardware(void)
  71 {
  72         /* Disable watchdog if enabled by bootloader/fuses */
  73         MCUSR &= ~(1 << WDRF);
  74         wdt_disable();
  75
  76         /* Disable clock division */
  77         clock_prescale_set(clock_div_1);
  78
  79         /* Hardware Initialization */
  80         Joystick_Init();
  81         LEDs_Init();
  82         Buttons_Init();
  83         USB_Init();
  84
  85         /* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */
  86         OCR0A  = ((F_CPU / 64) / 1000);
  87         TCCR0A = (1 << WGM01);
  88         TCCR0B = ((1 << CS01) | (1 << CS00));
  89         TIMSK0 = (1 << OCIE0A);
  90 }
  91
  92 /** Event handler for the library USB Connection event. */
  93 void EVENT_USB_Connect(void)
  94 {
  95     LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  96 }
  97
  98 /** Event handler for the library USB Disconnection event. */
  99 void EVENT_USB_Disconnect(void)
 100 {
 101     LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 102 }
 103
 104 /** Event handler for the library USB Configuration Changed event. */
 105 void EVENT_USB_ConfigurationChanged(void)
 106 {
 107         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 108
 109         if (!(USB_HID_ConfigureEndpoints(&Mouse_HID_Interface)))
 110           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 111 }
 112
 113 /** Event handler for the library USB Unhandled Control Packet event. */
 114 void EVENT_USB_UnhandledControlPacket(void)
 115 {
 116         USB_HID_ProcessControlPacket(&Mouse_HID_Interface);
 117 }
 118
 119 /** ISR to keep track of each millisecond interrupt, for determining the HID class idle period remaining when set. */
 120 ISR(TIMER0_COMPA_vect, ISR_BLOCK)
 121 {
 122         if (Mouse_HID_Interface.IdleMSRemaining)
 123           Mouse_HID_Interface.IdleMSRemaining--;
 124 }
 125
 126 /** HID class driver callback function for the creation of HID reports to the host.
 127  *
 128  *  \param HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 129  *  \param ReportData  Pointer to a buffer where the created report should be stored
 130  *
 131  *  \return Number of bytes written in the report (or zero if no report is to be sent
 132  */
 133 uint16_t CALLBACK_USB_HID_CreateNextHIDReport(USB_ClassInfo_HID_t* HIDInterfaceInfo, void* ReportData)
 134 {
 135         USB_MouseReport_Data_t* MouseReport = (USB_MouseReport_Data_t*)ReportData;
 136
 137         uint8_t JoyStatus_LCL    = Joystick_GetStatus();
 138         uint8_t ButtonStatus_LCL = Buttons_GetStatus();
 139
 140         if (JoyStatus_LCL & JOY_UP)
 141           MouseReport->Y = -1;
 142         else if (JoyStatus_LCL & JOY_DOWN)
 143           MouseReport->Y =  1;
 144
 145         if (JoyStatus_LCL & JOY_RIGHT)
 146           MouseReport->X =  1;
 147         else if (JoyStatus_LCL & JOY_LEFT)
 148           MouseReport->X = -1;
 149
 150         if (JoyStatus_LCL & JOY_PRESS)
 151           MouseReport->Button  = (1 << 0);
 152
 153         if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 154           MouseReport->Button |= (1 << 1);
 155
 156         return sizeof(USB_MouseReport_Data_t);
 157 }
 158
 159 /** HID class driver callback function for the processing of HID reports from the host.
 160  *
 161  *  \param HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 162  *  \param ReportData  Pointer to a buffer where the created report has been stored
 163  *  \param ReportSize  Size in bytes of the received HID report
 164  */
 165 void CALLBACK_USB_HID_ProcessReceivedHIDReport(USB_ClassInfo_HID_t* HIDInterfaceInfo, void* ReportData, uint16_t ReportSize)
 166 {
 167         // Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports
 168 }