Demos/Host/ClassDriver/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 of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "AndroidAccessoryHost.h"
  38
  39 /** LUFA Android Open Accessory Class driver interface configuration and state information. This
  40  *  structure is passed to all Android Open Accessory Class driver functions, so that multiple
  41  *  instances of the same class within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_AOA_Host_t AndroidDevice_AOA_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .DataINPipeNumber           = 1,
  48                                 .DataINPipeDoubleBank       = false,
  49
  50                                 .DataOUTPipeNumber          = 2,
  51                                 .DataOUTPipeDoubleBank      = false,
  52
  53                                 .PropertyStrings =
  54                                         {
  55                                                 .Manufacturer       = "Dean Camera",
  56                                                 .Model              = "LUFA Android Demo",
  57                                                 .Description        = "LUFA Android Demo",
  58                                                 .Version            = "1.0",
  59                                                 .URI                = "http://www.lufa-lib.org",
  60                                                 .Serial             = "0000000012345678",
  61                                         },
  62                         },
  63         };
  64
  65
  66 /** Main program entry point. This routine configures the hardware required by the application, then
  67  *  enters a loop to run the application tasks in sequence.
  68  */
  69 int main(void)
  70 {
  71         SetupHardware();
  72
  73         puts_P(PSTR(ESC_FG_CYAN "Android Accessory Host Demo running.\r\n" ESC_FG_WHITE));
  74
  75         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  76         sei();
  77
  78         for (;;)
  79         {
  80                 AOAHost_Task();
  81
  82                 AOA_Host_USBTask(&AndroidDevice_AOA_Interface);
  83                 USB_USBTask();
  84         }
  85 }
  86
  87 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  88 void SetupHardware(void)
  89 {
  90         /* Disable watchdog if enabled by bootloader/fuses */
  91         MCUSR &= ~(1 << WDRF);
  92         wdt_disable();
  93
  94         /* Disable clock division */
  95         clock_prescale_set(clock_div_1);
  96
  97         /* Hardware Initialization */
  98         Serial_Init(9600, false);
  99         LEDs_Init();
 100         USB_Init();
 101
 102         /* Create a stdio stream for the serial port for stdin and stdout */
 103         Serial_CreateStream(NULL);
 104 }
 105
 106 /** Task to manage an enumerated USB Android Accessory device once connected, to print received data
 107  *  from the device to the serial port.
 108  */
 109 void AOAHost_Task(void)
 110 {
 111         if (USB_HostState != HOST_STATE_Configured)
 112           return;
 113
 114         if (AOA_Host_BytesReceived(&AndroidDevice_AOA_Interface))
 115         {
 116                 /* Echo received bytes from the attached device through the USART */
 117                 int16_t ReceivedByte = AOA_Host_ReceiveByte(&AndroidDevice_AOA_Interface);
 118                 if (!(ReceivedByte < 0))
 119                   putchar(ReceivedByte);
 120         }
 121 }
 122
 123 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 124  *  starts the library USB task to begin the enumeration and USB management process.
 125  */
 126 void EVENT_USB_Host_DeviceAttached(void)
 127 {
 128         puts_P(PSTR("Device Attached.\r\n"));
 129         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 130 }
 131
 132 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 133  *  stops the library USB task management process.
 134  */
 135 void EVENT_USB_Host_DeviceUnattached(void)
 136 {
 137         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 138         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 139 }
 140
 141 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 142  *  enumerated by the host and is now ready to be used by the application.
 143  */
 144 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 145 {
 146         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 147
 148         USB_Descriptor_Device_t DeviceDescriptor;
 149
 150         if (USB_Host_GetDeviceDescriptor(&DeviceDescriptor) != HOST_SENDCONTROL_Successful)
 151         {
 152                 puts_P(PSTR("Error Retrieving Device Descriptor.\r\n"));
 153                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 154                 return;
 155         }
 156
 157         bool NeedModeSwitch;
 158         if (!(AOA_Host_ValidateAccessoryDevice(&AndroidDevice_AOA_Interface, &DeviceDescriptor, &NeedModeSwitch)))
 159         {
 160                 puts_P(PSTR("Not an Android device.\r\n"));
 161                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 162                 return;
 163         }
 164
 165         if (NeedModeSwitch)
 166         {
 167                 puts_P(PSTR("Not in Accessory mode, switching...\r\n"));
 168                 AOA_Host_StartAccessoryMode(&AndroidDevice_AOA_Interface);
 169                 return;
 170         }
 171
 172         uint16_t ConfigDescriptorSize;
 173         uint8_t  ConfigDescriptorData[512];
 174
 175         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 176                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 177         {
 178                 puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
 179                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 180                 return;
 181         }
 182
 183         if (AOA_Host_ConfigurePipes(&AndroidDevice_AOA_Interface,
 184                                     ConfigDescriptorSize, ConfigDescriptorData) != AOA_ENUMERROR_NoError)
 185         {
 186                 puts_P(PSTR("Attached Device Not a Valid Android Accessory Class Device.\r\n"));
 187                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 188                 return;
 189         }
 190
 191         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 192         {
 193                 puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 194                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 195                 return;
 196         }
 197
 198         puts_P(PSTR("Android Device Enumerated.\r\n"));
 199         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 200 }
 201
 202 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 203 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 204 {
 205         USB_Disable();
 206
 207         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 208                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 209
 210         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 211         for(;;);
 212 }
 213
 214 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 215  *  enumerating an attached USB device.
 216  */
 217 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 218                                             const uint8_t SubErrorCode)
 219 {
 220         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 221                                  " -- Error Code %d\r\n"
 222                                  " -- Sub Error Code %d\r\n"
 223                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 224
 225         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 226 }
 227
 228