Demos/Device/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 /** 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 Joystick_HID_Interface =
  44         {
  45                 .InterfaceNumber         = 0,
  46
  47                 .ReportINEndpointNumber  = JOYSTICK_EPNUM,
  48                 .ReportINEndpointSize    = JOYSTICK_EPSIZE,
  49
  50                 .ReportINBufferSize      = sizeof(USB_JoystickReport_Data_t),
  51
  52                 .UsingReportProtocol     = true,
  53         };
  54
  55 /** Main program entry point. This routine contains the overall program flow, including initial
  56  *  setup of all components and the main program loop.
  57  */
  58 int main(void)
  59 {
  60         SetupHardware();
  61
  62         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  63
  64         for (;;)
  65         {
  66                 USB_HID_USBTask(&Joystick_HID_Interface);
  67                 USB_USBTask();
  68         }
  69 }
  70
  71 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  72 void SetupHardware(void)
  73 {
  74         /* Disable watchdog if enabled by bootloader/fuses */
  75         MCUSR &= ~(1 << WDRF);
  76         wdt_disable();
  77
  78         /* Disable clock division */
  79         clock_prescale_set(clock_div_1);
  80
  81         /* Hardware Initialization */
  82         Joystick_Init();
  83         LEDs_Init();
  84         Buttons_Init();
  85         USB_Init();
  86
  87         /* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */
  88         OCR0A  = ((F_CPU / 64) / 1000);
  89         TCCR0A = (1 << WGM01);
  90         TCCR0B = ((1 << CS01) | (1 << CS00));
  91         TIMSK0 = (1 << OCIE0A);
  92 }
  93
  94 /** Event handler for the library USB Connection event. */
  95 void EVENT_USB_Connect(void)
  96 {
  97         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  98 }
  99
 100 /** Event handler for the library USB Disconnection event. */
 101 void EVENT_USB_Disconnect(void)
 102 {
 103         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 104 }
 105
 106 /** Event handler for the library USB Configuration Changed event. */
 107 void EVENT_USB_ConfigurationChanged(void)
 108 {
 109         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 110
 111         if (!(USB_HID_ConfigureEndpoints(&Joystick_HID_Interface)))
 112           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 113 }
 114
 115 /** Event handler for the library USB Unhandled Control Packet event. */
 116 void EVENT_USB_UnhandledControlPacket(void)
 117 {
 118         USB_HID_ProcessControlPacket(&Joystick_HID_Interface);
 119 }
 120
 121 /** ISR to keep track of each millisecond interrupt, for determining the HID class idle period remaining when set. */
 122 ISR(TIMER0_COMPA_vect, ISR_BLOCK)
 123 {
 124         if (Joystick_HID_Interface.IdleMSRemaining)
 125           Joystick_HID_Interface.IdleMSRemaining--;
 126 }
 127
 128 /** HID class driver callback function for the creation of HID reports to the host.
 129  *
 130  *  \param HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 131  *  \param ReportData  Pointer to a buffer where the created report should be stored
 132  *
 133  *  \return Number of bytes written in the report (or zero if no report is to be sent
 134  */
 135 uint16_t CALLBACK_USB_HID_CreateNextHIDReport(USB_ClassInfo_HID_t* HIDInterfaceInfo, uint8_t* ReportID, void* ReportData)
 136 {
 137         USB_JoystickReport_Data_t* JoystickReport = (USB_JoystickReport_Data_t*)ReportData;
 138
 139         uint8_t JoyStatus_LCL    = Joystick_GetStatus();
 140         uint8_t ButtonStatus_LCL = Buttons_GetStatus();
 141
 142         if (JoyStatus_LCL & JOY_UP)
 143           JoystickReport->Y = -100;
 144         else if (JoyStatus_LCL & JOY_DOWN)
 145           JoystickReport->Y =  100;
 146
 147         if (JoyStatus_LCL & JOY_RIGHT)
 148           JoystickReport->X =  100;
 149         else if (JoyStatus_LCL & JOY_LEFT)
 150           JoystickReport->X = -100;
 151
 152         if (JoyStatus_LCL & JOY_PRESS)
 153           JoystickReport->Button  = (1 << 1);
 154
 155         if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 156           JoystickReport->Button |= (1 << 0);
 157
 158         return sizeof(USB_JoystickReport_Data_t);
 159 }
 160
 161 /** HID class driver callback function for the processing of HID reports from the host.
 162  *
 163  *  \param HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 164  *  \param ReportData  Pointer to a buffer where the created report has been stored
 165  *  \param ReportSize  Size in bytes of the received HID report
 166  */
 167 void CALLBACK_USB_HID_ProcessReceivedHIDReport(USB_ClassInfo_HID_t* HIDInterfaceInfo, uint8_t ReportID,
 168                                                void* ReportData, uint16_t ReportSize)
 169 {
 170         // Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports
 171 }