Demos/Host/ClassDriver/AndroidAccessoryHost/AndroidAccessoryHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  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 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         GlobalInterruptEnable();
  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                 {
 124                         /* Turn on and off LED1 based on the bytes received */
 125                         LEDs_ChangeLEDs(LEDS_LED1, ReceivedByte ? LEDS_LED1 : LEDS_NO_LEDS);
 126
 127                         putchar(ReceivedByte);
 128                 }
 129         }
 130 }
 131
 132 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 133  *  starts the library USB task to begin the enumeration and USB management process.
 134  */
 135 void EVENT_USB_Host_DeviceAttached(void)
 136 {
 137         puts_P(PSTR("Device Attached.\r\n"));
 138         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 139 }
 140
 141 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 142  *  stops the library USB task management process.
 143  */
 144 void EVENT_USB_Host_DeviceUnattached(void)
 145 {
 146         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 147         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 148 }
 149
 150 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 151  *  enumerated by the host and is now ready to be used by the application.
 152  */
 153 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 154 {
 155         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 156
 157         USB_Descriptor_Device_t DeviceDescriptor;
 158
 159         if (USB_Host_GetDeviceDescriptor(&DeviceDescriptor) != HOST_SENDCONTROL_Successful)
 160         {
 161                 puts_P(PSTR("Error Retrieving Device Descriptor.\r\n"));
 162                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 163                 return;
 164         }
 165
 166         bool NeedModeSwitch;
 167         if (!(AOA_Host_ValidateAccessoryDevice(&AndroidDevice_AOA_Interface, &DeviceDescriptor, &NeedModeSwitch)))
 168         {
 169                 puts_P(PSTR("Not an Android device.\r\n"));
 170                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 171                 return;
 172         }
 173
 174         if (NeedModeSwitch)
 175         {
 176                 puts_P(PSTR("Not in Accessory mode, switching...\r\n"));
 177                 AOA_Host_StartAccessoryMode(&AndroidDevice_AOA_Interface);
 178                 return;
 179         }
 180
 181         uint16_t ConfigDescriptorSize;
 182         uint8_t  ConfigDescriptorData[512];
 183
 184         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 185                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 186         {
 187                 puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
 188                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 189                 return;
 190         }
 191
 192         if (AOA_Host_ConfigurePipes(&AndroidDevice_AOA_Interface,
 193                                     ConfigDescriptorSize, ConfigDescriptorData) != AOA_ENUMERROR_NoError)
 194         {
 195                 puts_P(PSTR("Attached Device Not a Valid Android Accessory Class Device.\r\n"));
 196                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 197                 return;
 198         }
 199
 200         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 201         {
 202                 puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 203                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 204                 return;
 205         }
 206
 207         puts_P(PSTR("Android Device Enumerated.\r\n"));
 208         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 209 }
 210
 211 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 212 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 213 {
 214         USB_Disable();
 215
 216         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 217                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 218
 219         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 220         for(;;);
 221 }
 222
 223 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 224  *  enumerating an attached USB device.
 225  */
 226 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 227                                             const uint8_t SubErrorCode)
 228 {
 229         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 230                                  " -- Error Code %d\r\n"
 231                                  " -- Sub Error Code %d\r\n"
 232                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 233
 234         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 235 }
 236
 237