Demos/Host/LowLevel/AndroidAccessoryHost/AndroidAccessoryHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  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                 AndroidHost_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 /** Task to set the configuration of the attached device after it has been enumerated. */
  78 void AndroidHost_Task(void)
  79 {
  80         if (USB_HostState != HOST_STATE_Configured)
  81           return;
  82
  83         /* Select the data IN pipe */
  84         Pipe_SelectPipe(ANDROID_DATA_IN_PIPE);
  85         Pipe_Unfreeze();
  86
  87         /* Check to see if a packet has been received */
  88         if (Pipe_IsINReceived())
  89         {
  90                 /* Re-freeze IN pipe after the packet has been received */
  91                 Pipe_Freeze();
  92
  93                 /* Check if data is in the pipe */
  94                 if (Pipe_IsReadWriteAllowed())
  95                 {
  96                         uint8_t NextReceivedByte = Pipe_Read_8();
  97                         uint8_t LEDMask          = LEDS_NO_LEDS;
  98
  99                         if (NextReceivedByte & 0x01)
 100                           LEDMask |= LEDS_LED1;
 101
 102                         if (NextReceivedByte & 0x02)
 103                           LEDMask |= LEDS_LED2;
 104
 105                         if (NextReceivedByte & 0x04)
 106                           LEDMask |= LEDS_LED3;
 107
 108                         if (NextReceivedByte & 0x08)
 109                           LEDMask |= LEDS_LED4;
 110
 111                         LEDs_SetAllLEDs(LEDMask);
 112                 }
 113                 else
 114                 {
 115                         /* Clear the pipe after all data in the packet has been read, ready for the next packet */
 116                         Pipe_ClearIN();
 117                 }
 118         }
 119
 120         /* Re-freeze IN pipe after use */
 121         Pipe_Freeze();
 122 }
 123
 124 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 125  *  starts the library USB task to begin the enumeration and USB management process.
 126  */
 127 void EVENT_USB_Host_DeviceAttached(void)
 128 {
 129         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
 130         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 131 }
 132
 133 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 134  *  stops the library USB task management process.
 135  */
 136 void EVENT_USB_Host_DeviceUnattached(void)
 137 {
 138         puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
 139         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 140 }
 141
 142 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 143  *  enumerated by the host and is now ready to be used by the application.
 144  */
 145 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 146 {
 147         puts_P(PSTR("Getting Device Data.\r\n"));
 148
 149         /* Get and process the configuration descriptor data */
 150         uint8_t ErrorCode = ProcessDeviceDescriptor();
 151
 152         bool RequiresModeSwitch = (ErrorCode == NonAccessoryModeAndroidDevice);
 153
 154         /* Error out if the device is not an Android device or an error occurred */
 155         if ((ErrorCode != AccessoryModeAndroidDevice) && (ErrorCode != NonAccessoryModeAndroidDevice))
 156         {
 157                 if (ErrorCode == ControlError)
 158                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Device).\r\n"));
 159                 else
 160                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 161
 162                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 163
 164                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 165                 return;
 166         }
 167
 168         printf_P(PSTR("Android Device Detected - %sAccessory mode.\r\n"), (RequiresModeSwitch ? "Non-" : ""));
 169
 170         /* Check if a valid Android device was attached, but it is not current in Accessory mode */
 171         if (RequiresModeSwitch)
 172         {
 173                 uint16_t AndroidProtocol;
 174
 175                 /* Fetch the version of the Android Accessory Protocol supported by the device */
 176                 if ((ErrorCode = Android_GetAccessoryProtocol(&AndroidProtocol)) != HOST_SENDCONTROL_Successful)
 177                 {
 178                         printf_P(PSTR(ESC_FG_RED "Control Error (Get Protocol).\r\n"
 179                                                  " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 180
 181                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 182                         return;
 183                 }
 184
 185                 /* Validate the returned protocol version */
 186                 if (AndroidProtocol != AOA_PROTOCOL_AccessoryV1)
 187                 {
 188                         puts_P(PSTR(ESC_FG_RED "Accessory Mode Not Supported."));
 189
 190                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 191                         return;
 192                 }
 193
 194                 /* Send the device strings and start the Android Accessory Mode */
 195                 Android_SendString(AOA_STRING_Manufacturer, "Dean Camera");
 196                 Android_SendString(AOA_STRING_Model,        "LUFA Android Demo");
 197                 Android_SendString(AOA_STRING_Description,  "LUFA Android Demo");
 198                 Android_SendString(AOA_STRING_Version,      "1.0");
 199                 Android_SendString(AOA_STRING_URI,          "http://www.lufa-lib.org");
 200                 Android_SendString(AOA_STRING_Serial,       "0000000012345678");
 201
 202                 Android_StartAccessoryMode();
 203                 return;
 204         }
 205
 206         puts_P(PSTR("Getting Config Data.\r\n"));
 207
 208         /* Get and process the configuration descriptor data */
 209         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 210         {
 211                 if (ErrorCode == ControlError)
 212                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 213                 else
 214                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 215
 216                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 217
 218                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 219                 return;
 220         }
 221
 222         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 223         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 224         {
 225                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 226                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 227
 228                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 229                 return;
 230         }
 231
 232         puts_P(PSTR("Accessory Mode Android Enumerated.\r\n"));
 233         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 234 }
 235
 236 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 237 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 238 {
 239         USB_Disable();
 240
 241         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 242                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 243
 244         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 245         for(;;);
 246 }
 247
 248 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 249  *  enumerating an attached USB device.
 250  */
 251 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 252                                             const uint8_t SubErrorCode)
 253 {
 254         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 255                                  " -- Error Code %d\r\n"
 256                                  " -- Sub Error Code %d\r\n"
 257                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 258
 259         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 260 }
 261