Demos/Host/Incomplete/AndroidAccessoryHost/AndroidAccessoryHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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 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 AndroidAccessoryHost demo. This file contains the main tasks
  34  *  of the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "AndroidAccessoryHost.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 "Android Accessory Host Demo running.\r\n" ESC_FG_WHITE));
  47
  48         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  49         sei();
  50
  51         for (;;)
  52         {
  53                 Android_Host_Task();
  54                 USB_USBTask();
  55         }
  56 }
  57
  58 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  59 void SetupHardware(void)
  60 {
  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
  68         /* Hardware Initialization */
  69         Serial_Init(9600, false);
  70         LEDs_Init();
  71         USB_Init();
  72
  73         /* Create a stdio stream for the serial port for stdin and stdout */
  74         Serial_CreateStream(NULL);
  75 }
  76
  77 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  78  *  starts the library USB task to begin the enumeration and USB management process.
  79  */
  80 void EVENT_USB_Host_DeviceAttached(void)
  81 {
  82         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
  83         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  84 }
  85
  86 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  87  *  stops the library USB task management process.
  88  */
  89 void EVENT_USB_Host_DeviceUnattached(void)
  90 {
  91         puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
  92         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  93 }
  94
  95 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
  96  *  enumerated by the host and is now ready to be used by the application.
  97  */
  98 void EVENT_USB_Host_DeviceEnumerationComplete(void)
  99 {
 100         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 101 }
 102
 103 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 104 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 105 {
 106         USB_Disable();
 107
 108         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 109                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 110
 111         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 112         for(;;);
 113 }
 114
 115 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 116  *  enumerating an attached USB device.
 117  */
 118 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 119                                             const uint8_t SubErrorCode)
 120 {
 121         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 122                                  " -- Error Code %d\r\n"
 123                                  " -- Sub Error Code %d\r\n"
 124                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 125
 126         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 127 }
 128
 129 /** Task to set the configuration of the attached device after it has been enumerated. */
 130 void Android_Host_Task(void)
 131 {
 132         uint8_t ErrorCode;
 133
 134         switch (USB_HostState)
 135         {
 136                 case HOST_STATE_Addressed:
 137                         puts_P(PSTR("Getting Device Data.\r\n"));
 138
 139                         /* Get and process the configuration descriptor data */
 140                         ErrorCode = ProcessDeviceDescriptor();
 141
 142                         /* Save whether the Android device needs to be mode-switched later on */
 143                         bool RequiresModeSwitch = (ErrorCode == NonAccessoryModeAndroidDevice);
 144
 145                         /* Error out if the device is not an Android device or an error occurred */
 146                         if ((ErrorCode != AccessoryModeAndroidDevice) && !(RequiresModeSwitch))
 147                         {
 148                                 if (ErrorCode == DevControlError)
 149                                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Device).\r\n"));
 150                                 else
 151                                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 152
 153                                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 154
 155                                 /* Indicate error via status LEDs */
 156                                 LEDs_SetAllLEDs(LEDS_LED1);
 157
 158                                 /* Wait until USB device disconnected */
 159                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 160                                 break;
 161                         }
 162
 163                         printf_P(PSTR("Android Device Detected - %sAccessory mode.\r\n"), (RequiresModeSwitch ? "Non-" : ""));
 164
 165                         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 166                         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 167                         {
 168                                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 169                                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 170
 171                                 /* Indicate error via status LEDs */
 172                                 LEDs_SetAllLEDs(LEDS_LED1);
 173
 174                                 /* Wait until USB device disconnected */
 175                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 176                                 break;
 177                         }
 178
 179                         /* Check if a valid Android device was attached, but it is not current in Accessory mode */
 180                         if (RequiresModeSwitch)
 181                         {
 182                                 USB_ControlRequest = (USB_Request_Header_t)
 183                                 {
 184                                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_VENDOR | REQREC_DEVICE),
 185                                         .bRequest      = ANDROID_Req_StartAccessoryMode,
 186                                         .wValue        = 0,
 187                                         .wIndex        = 0,
 188                                         .wLength       = 0,
 189                                 };
 190
 191                                 /* Send the control request for the Android device to switch to accessory mode */
 192                                 Pipe_SelectPipe(PIPE_CONTROLPIPE);
 193                                 USB_Host_SendControlRequest(NULL);
 194
 195                                 /* Wait until USB device disconnected */
 196                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 197                                 break;
 198                         }
 199
 200                         puts_P(PSTR("Getting Config Data.\r\n"));
 201
 202                         /* Get and process the configuration descriptor data */
 203                         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 204                         {
 205                                 if (ErrorCode == ControlError)
 206                                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 207                                 else
 208                                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 209
 210                                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 211
 212                                 /* Indicate error via status LEDs */
 213                                 LEDs_SetAllLEDs(LEDS_LED1);
 214
 215                                 /* Wait until USB device disconnected */
 216                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 217                                 break;
 218                         }
 219
 220                         puts_P(PSTR("Accessory Mode Android Enumerated.\r\n"));
 221
 222                         USB_HostState = HOST_STATE_Configured;
 223                         break;
 224                 case HOST_STATE_Configured:
 225                         /* Select the data IN pipe */
 226                         Pipe_SelectPipe(ANDROID_DATA_IN_PIPE);
 227                         Pipe_Unfreeze();
 228
 229                         /* Check to see if a packet has been received */
 230                         if (Pipe_IsINReceived())
 231                         {
 232                                 /* Re-freeze IN pipe after the packet has been received */
 233                                 Pipe_Freeze();
 234
 235                                 /* Check if data is in the pipe */
 236                                 if (Pipe_IsReadWriteAllowed())
 237                                 {
 238                                         uint8_t NextReceivedByte = Pipe_BytesInPipe();
 239                                         uint8_t LEDMask          = LEDS_NO_LEDS;
 240
 241                                         if (NextReceivedByte & 0x01)
 242                                                 LEDMask |= LEDS_LED1;
 243
 244                                         if (NextReceivedByte & 0x02)
 245                                                 LEDMask |= LEDS_LED2;
 246
 247                                         if (NextReceivedByte & 0x04)
 248                                                 LEDMask |= LEDS_LED3;
 249
 250                                         if (NextReceivedByte & 0x08)
 251                                                 LEDMask |= LEDS_LED4;
 252
 253                                         LEDs_SetAllLEDs(LEDMask);
 254                                 }
 255                                 else
 256                                 {
 257                                         /* Clear the pipe after all data in the packet has been read, ready for the next packet */
 258                                         Pipe_ClearIN();
 259                                 }
 260                         }
 261
 262                         /* Re-freeze IN pipe after use */
 263                         Pipe_Freeze();
 264                         break;
 265         }
 266 }
 267