Demos/Host/ClassDriver/VirtualSerialHost/VirtualSerialHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2010  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 VirtualSerialHost demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "VirtualSerialHost.h"
  38
  39 /** LUFA CDC Class driver interface configuration and state information. This structure is
  40  *  passed to all CDC Class driver functions, so that multiple instances of the same class
  41  *  within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_CDC_Host_t VirtualSerial_CDC_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .DataINPipeNumber           = 1,
  48                                 .DataINPipeDoubleBank       = false,
  49
  50                                 .DataOUTPipeNumber          = 2,
  51                                 .DataOUTPipeDoubleBank      = false,
  52
  53                                 .NotificationPipeNumber     = 3,
  54                                 .NotificationPipeDoubleBank = false,
  55                         },
  56         };
  57
  58 /** Main program entry point. This routine configures the hardware required by the application, then
  59  *  enters a loop to run the application tasks in sequence.
  60  */
  61 int main(void)
  62 {
  63         SetupHardware();
  64
  65         puts_P(PSTR(ESC_FG_CYAN "CDC Host Demo running.\r\n" ESC_FG_WHITE));
  66
  67         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  68         sei();
  69
  70         for (;;)
  71         {
  72                 switch (USB_HostState)
  73                 {
  74                         case HOST_STATE_Addressed:
  75                                 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  76
  77                                 uint16_t ConfigDescriptorSize;
  78                                 uint8_t  ConfigDescriptorData[512];
  79
  80                                 if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
  81                                                                        sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
  82                                 {
  83                                         puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
  84                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  85                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  86                                         break;
  87                                 }
  88
  89                                 if (CDC_Host_ConfigurePipes(&VirtualSerial_CDC_Interface,
  90                                                             ConfigDescriptorSize, ConfigDescriptorData) != CDC_ENUMERROR_NoError)
  91                                 {
  92                                         puts_P(PSTR("Attached Device Not a Valid CDC Class Device.\r\n"));
  93                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  94                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  95                                         break;
  96                                 }
  97
  98                                 if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
  99                                 {
 100                                         puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 101                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 102                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 103                                         break;
 104                                 }
 105
 106                                 puts_P(PSTR("CDC Device Enumerated.\r\n"));
 107                                 LEDs_SetAllLEDs(LEDMASK_USB_READY);
 108                                 USB_HostState = HOST_STATE_Configured;
 109                                 break;
 110                         case HOST_STATE_Configured:
 111                                 if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 112                                 {
 113                                         /* Echo received bytes from the attached device through the USART */
 114                                         int16_t ReceivedByte = CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface);
 115                                         if (!(ReceivedByte < 0))
 116                                           putchar(ReceivedByte);
 117                                 }
 118
 119                                 break;
 120                 }
 121
 122                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
 123                 USB_USBTask();
 124         }
 125 }
 126
 127 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 128 void SetupHardware(void)
 129 {
 130         /* Disable watchdog if enabled by bootloader/fuses */
 131         MCUSR &= ~(1 << WDRF);
 132         wdt_disable();
 133
 134         /* Disable clock division */
 135         clock_prescale_set(clock_div_1);
 136
 137         /* Hardware Initialization */
 138         SerialStream_Init(9600, false);
 139         LEDs_Init();
 140         USB_Init();
 141 }
 142
 143 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 144  *  starts the library USB task to begin the enumeration and USB management process.
 145  */
 146 void EVENT_USB_Host_DeviceAttached(void)
 147 {
 148         puts_P(PSTR("Device Attached.\r\n"));
 149         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 150 }
 151
 152 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 153  *  stops the library USB task management process.
 154  */
 155 void EVENT_USB_Host_DeviceUnattached(void)
 156 {
 157         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 158         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 159 }
 160
 161 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 162  *  enumerated by the host and is now ready to be used by the application.
 163  */
 164 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 165 {
 166         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 167 }
 168
 169 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 170 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 171 {
 172         USB_ShutDown();
 173
 174         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 175                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 176
 177         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 178         for(;;);
 179 }
 180
 181 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 182  *  enumerating an attached USB device.
 183  */
 184 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 185                                             const uint8_t SubErrorCode)
 186 {
 187         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 188                                  " -- Error Code %d\r\n"
 189                                  " -- Sub Error Code %d\r\n"
 190                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 191
 192         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 193 }
 194