Demos/Device/LowLevel/GenericHID/GenericHID.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all 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 disclaims 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 GenericHID demo. This file contains the main tasks of the demo and
  34  *  is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "GenericHID.h"
  38
  39
  40 /** Main program entry point. This routine configures the hardware required by the application, then
  41  *  enters a loop to run the application tasks in sequence.
  42  */
  43 int main(void)
  44 {
  45         SetupHardware();
  46
  47         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  48         GlobalInterruptEnable();
  49
  50         for (;;)
  51         {
  52                 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 #if (ARCH == ARCH_AVR8)
  61         /* Disable watchdog if enabled by bootloader/fuses */
  62         MCUSR &= ~(1 << WDRF);
  63         wdt_disable();
  64
  65         /* Disable clock division */
  66         clock_prescale_set(clock_div_1);
  67 #elif (ARCH == ARCH_XMEGA)
  68         /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
  69         XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
  70         XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
  71
  72         /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
  73         XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
  74         XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
  75
  76         PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
  77 #endif
  78
  79         /* Hardware Initialization */
  80         LEDs_Init();
  81         USB_Init();
  82 }
  83
  84 /** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
  85  *  starts the library USB task to begin the enumeration and USB management process.
  86  */
  87 void EVENT_USB_Device_Connect(void)
  88 {
  89         /* Indicate USB enumerating */
  90         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  91 }
  92
  93 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
  94  *  the status LEDs and stops the USB management task.
  95  */
  96 void EVENT_USB_Device_Disconnect(void)
  97 {
  98         /* Indicate USB not ready */
  99         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 100 }
 101
 102 /** Event handler for the USB_ConfigurationChanged event. This is fired when the host sets the current configuration
 103  *  of the USB device after enumeration, and configures the generic HID device endpoints.
 104  */
 105 void EVENT_USB_Device_ConfigurationChanged(void)
 106 {
 107         bool ConfigSuccess = true;
 108
 109         /* Setup HID Report Endpoints */
 110         ConfigSuccess &= Endpoint_ConfigureEndpoint(GENERIC_IN_EPADDR, EP_TYPE_INTERRUPT, GENERIC_EPSIZE, 1);
 111         ConfigSuccess &= Endpoint_ConfigureEndpoint(GENERIC_OUT_EPADDR, EP_TYPE_INTERRUPT, GENERIC_EPSIZE, 1);
 112
 113         /* Indicate endpoint configuration success or failure */
 114         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 115 }
 116
 117 /** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
 118  *  the device from the USB host before passing along unhandled control requests to the library for processing
 119  *  internally.
 120  */
 121 void EVENT_USB_Device_ControlRequest(void)
 122 {
 123         /* Handle HID Class specific requests */
 124         switch (USB_ControlRequest.bRequest)
 125         {
 126                 case HID_REQ_GetReport:
 127                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
 128                         {
 129                                 uint8_t GenericData[GENERIC_REPORT_SIZE];
 130                                 CreateGenericHIDReport(GenericData);
 131
 132                                 Endpoint_ClearSETUP();
 133
 134                                 /* Write the report data to the control endpoint */
 135                                 Endpoint_Write_Control_Stream_LE(&GenericData, sizeof(GenericData));
 136                                 Endpoint_ClearOUT();
 137                         }
 138
 139                         break;
 140                 case HID_REQ_SetReport:
 141                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
 142                         {
 143                                 uint8_t GenericData[GENERIC_REPORT_SIZE];
 144
 145                                 Endpoint_ClearSETUP();
 146
 147                                 /* Read the report data from the control endpoint */
 148                                 Endpoint_Read_Control_Stream_LE(&GenericData, sizeof(GenericData));
 149                                 Endpoint_ClearIN();
 150
 151                                 ProcessGenericHIDReport(GenericData);
 152                         }
 153
 154                         break;
 155         }
 156 }
 157
 158 /** Function to process the last received report from the host.
 159  *
 160  *  \param[in] DataArray  Pointer to a buffer where the last received report has been stored
 161  */
 162 void ProcessGenericHIDReport(uint8_t* DataArray)
 163 {
 164         /*
 165                 This is where you need to process reports sent from the host to the device. This
 166                 function is called each time the host has sent a new report. DataArray is an array
 167                 holding the report sent from the host.
 168         */
 169
 170         uint8_t NewLEDMask = LEDS_NO_LEDS;
 171
 172         if (DataArray[0])
 173           NewLEDMask |= LEDS_LED1;
 174
 175         if (DataArray[1])
 176           NewLEDMask |= LEDS_LED2;
 177
 178         if (DataArray[2])
 179           NewLEDMask |= LEDS_LED3;
 180
 181         if (DataArray[3])
 182           NewLEDMask |= LEDS_LED4;
 183
 184         LEDs_SetAllLEDs(NewLEDMask);
 185 }
 186
 187 /** Function to create the next report to send back to the host at the next reporting interval.
 188  *
 189  *  \param[out] DataArray  Pointer to a buffer where the next report data should be stored
 190  */
 191 void CreateGenericHIDReport(uint8_t* DataArray)
 192 {
 193         /*
 194                 This is where you need to create reports to be sent to the host from the device. This
 195                 function is called each time the host is ready to accept a new report. DataArray is
 196                 an array to hold the report to the host.
 197         */
 198
 199         uint8_t CurrLEDMask = LEDs_GetLEDs();
 200
 201         DataArray[0] = ((CurrLEDMask & LEDS_LED1) ? 1 : 0);
 202         DataArray[1] = ((CurrLEDMask & LEDS_LED2) ? 1 : 0);
 203         DataArray[2] = ((CurrLEDMask & LEDS_LED3) ? 1 : 0);
 204         DataArray[3] = ((CurrLEDMask & LEDS_LED4) ? 1 : 0);
 205 }
 206
 207 void HID_Task(void)
 208 {
 209         /* Device must be connected and configured for the task to run */
 210         if (USB_DeviceState != DEVICE_STATE_Configured)
 211           return;
 212
 213         Endpoint_SelectEndpoint(GENERIC_OUT_EPADDR);
 214
 215         /* Check to see if a packet has been sent from the host */
 216         if (Endpoint_IsOUTReceived())
 217         {
 218                 /* Check to see if the packet contains data */
 219                 if (Endpoint_IsReadWriteAllowed())
 220                 {
 221                         /* Create a temporary buffer to hold the read in report from the host */
 222                         uint8_t GenericData[GENERIC_REPORT_SIZE];
 223
 224                         /* Read Generic Report Data */
 225                         Endpoint_Read_Stream_LE(&GenericData, sizeof(GenericData), NULL);
 226
 227                         /* Process Generic Report Data */
 228                         ProcessGenericHIDReport(GenericData);
 229                 }
 230
 231                 /* Finalize the stream transfer to send the last packet */
 232                 Endpoint_ClearOUT();
 233         }
 234
 235         Endpoint_SelectEndpoint(GENERIC_IN_EPADDR);
 236
 237         /* Check to see if the host is ready to accept another packet */
 238         if (Endpoint_IsINReady())
 239         {
 240                 /* Create a temporary buffer to hold the report to send to the host */
 241                 uint8_t GenericData[GENERIC_REPORT_SIZE];
 242
 243                 /* Create Generic Report Data */
 244                 CreateGenericHIDReport(GenericData);
 245
 246                 /* Write Generic Report Data */
 247                 Endpoint_Write_Stream_LE(&GenericData, sizeof(GenericData), NULL);
 248
 249                 /* Finalize the stream transfer to send the last packet */
 250                 Endpoint_ClearIN();
 251         }
 252 }
 253