Demos/Host/ClassDriver/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 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                                 .DataINPipe             =
  48                                         {
  49                                                 .Address        = (PIPE_DIR_IN  | 1),
  50                                                 .Banks          = 1,
  51                                         },
  52                                 .DataOUTPipe            =
  53                                         {
  54                                                 .Address        = (PIPE_DIR_OUT | 2),
  55                                                 .Banks          = 1,
  56                                         },
  57                                 .PropertyStrings =
  58                                         {
  59                                                 [AOA_STRING_Manufacturer] = "Dean Camera",
  60                                                 [AOA_STRING_Model]        = "LUFA Android Demo",
  61                                                 [AOA_STRING_Description]  = "LUFA Android Demo",
  62                                                 [AOA_STRING_Version]      = "1.0",
  63                                                 [AOA_STRING_URI]          = "http://www.lufa-lib.org",
  64                                                 [AOA_STRING_Serial]       = "0000000012345678",
  65                                         },
  66                         },
  67         };
  68
  69
  70 /** Main program entry point. This routine configures the hardware required by the application, then
  71  *  enters a loop to run the application tasks in sequence.
  72  */
  73 int main(void)
  74 {
  75         SetupHardware();
  76
  77         puts_P(PSTR(ESC_FG_CYAN "Android Accessory Host Demo running.\r\n" ESC_FG_WHITE));
  78
  79         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  80         sei();
  81
  82         for (;;)
  83         {
  84                 AOAHost_Task();
  85
  86                 AOA_Host_USBTask(&AndroidDevice_AOA_Interface);
  87                 USB_USBTask();
  88         }
  89 }
  90
  91 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  92 void SetupHardware(void)
  93 {
  94         /* Disable watchdog if enabled by bootloader/fuses */
  95         MCUSR &= ~(1 << WDRF);
  96         wdt_disable();
  97
  98         /* Disable clock division */
  99         clock_prescale_set(clock_div_1);
 100
 101         /* Hardware Initialization */
 102         Serial_Init(9600, false);
 103         LEDs_Init();
 104         USB_Init();
 105
 106         /* Create a stdio stream for the serial port for stdin and stdout */
 107         Serial_CreateStream(NULL);
 108 }
 109
 110 /** Task to manage an enumerated USB Android Accessory device once connected, to print received data
 111  *  from the device to the serial port.
 112  */
 113 void AOAHost_Task(void)
 114 {
 115         if (USB_HostState != HOST_STATE_Configured)
 116           return;
 117
 118         if (AOA_Host_BytesReceived(&AndroidDevice_AOA_Interface))
 119         {
 120                 /* Echo received bytes from the attached device through the USART */
 121                 int16_t ReceivedByte = AOA_Host_ReceiveByte(&AndroidDevice_AOA_Interface);
 122                 if (!(ReceivedByte < 0))
 123                   putchar(ReceivedByte);
 124         }
 125 }
 126
 127 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 128  *  starts the library USB task to begin the enumeration and USB management process.
 129  */
 130 void EVENT_USB_Host_DeviceAttached(void)
 131 {
 132         puts_P(PSTR("Device Attached.\r\n"));
 133         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 134 }
 135
 136 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 137  *  stops the library USB task management process.
 138  */
 139 void EVENT_USB_Host_DeviceUnattached(void)
 140 {
 141         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 142         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 143 }
 144
 145 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 146  *  enumerated by the host and is now ready to be used by the application.
 147  */
 148 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 149 {
 150         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 151
 152         USB_Descriptor_Device_t DeviceDescriptor;
 153
 154         if (USB_Host_GetDeviceDescriptor(&DeviceDescriptor) != HOST_SENDCONTROL_Successful)
 155         {
 156                 puts_P(PSTR("Error Retrieving Device Descriptor.\r\n"));
 157                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 158                 return;
 159         }
 160
 161         bool NeedModeSwitch;
 162         if (!(AOA_Host_ValidateAccessoryDevice(&AndroidDevice_AOA_Interface, &DeviceDescriptor, &NeedModeSwitch)))
 163         {
 164                 puts_P(PSTR("Not an Android device.\r\n"));
 165                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 166                 return;
 167         }
 168
 169         if (NeedModeSwitch)
 170         {
 171                 puts_P(PSTR("Not in Accessory mode, switching...\r\n"));
 172                 AOA_Host_StartAccessoryMode(&AndroidDevice_AOA_Interface);
 173                 return;
 174         }
 175
 176         uint16_t ConfigDescriptorSize;
 177         uint8_t  ConfigDescriptorData[512];
 178
 179         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 180                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 181         {
 182                 puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
 183                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 184                 return;
 185         }
 186
 187         if (AOA_Host_ConfigurePipes(&AndroidDevice_AOA_Interface,
 188                                     ConfigDescriptorSize, ConfigDescriptorData) != AOA_ENUMERROR_NoError)
 189         {
 190                 puts_P(PSTR("Attached Device Not a Valid Android Accessory Class Device.\r\n"));
 191                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 192                 return;
 193         }
 194
 195         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 196         {
 197                 puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 198                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 199                 return;
 200         }
 201
 202         puts_P(PSTR("Android Device Enumerated.\r\n"));
 203         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 204 }
 205
 206 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 207 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 208 {
 209         USB_Disable();
 210
 211         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 212                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 213
 214         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 215         for(;;);
 216 }
 217
 218 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 219  *  enumerating an attached USB device.
 220  */
 221 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 222                                             const uint8_t SubErrorCode)
 223 {
 224         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 225                                  " -- Error Code %d\r\n"
 226                                  " -- Sub Error Code %d\r\n"
 227                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 228
 229         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 230 }
 231
 232