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.fourwalledcubicle.com
   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                                         while (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 115                                           putchar(CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface));
 116
 117                                         CDC_Host_Flush(&VirtualSerial_CDC_Interface);
 118                                 }
 119
 120                                 break;
 121                 }
 122
 123                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
 124                 USB_USBTask();
 125         }
 126 }
 127
 128 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 129 void SetupHardware(void)
 130 {
 131         /* Disable watchdog if enabled by bootloader/fuses */
 132         MCUSR &= ~(1 << WDRF);
 133         wdt_disable();
 134
 135         /* Disable clock division */
 136         clock_prescale_set(clock_div_1);
 137
 138         /* Hardware Initialization */
 139         SerialStream_Init(9600, false);
 140         LEDs_Init();
 141         USB_Init();
 142 }
 143
 144 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 145  *  starts the library USB task to begin the enumeration and USB management process.
 146  */
 147 void EVENT_USB_Host_DeviceAttached(void)
 148 {
 149         puts_P(PSTR("Device Attached.\r\n"));
 150         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 151 }
 152
 153 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 154  *  stops the library USB task management process.
 155  */
 156 void EVENT_USB_Host_DeviceUnattached(void)
 157 {
 158         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 159         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 160 }
 161
 162 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 163  *  enumerated by the host and is now ready to be used by the application.
 164  */
 165 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 166 {
 167         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 168 }
 169
 170 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 171 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 172 {
 173         USB_ShutDown();
 174
 175         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 176                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 177
 178         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 179         for(;;);
 180 }
 181
 182 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 183  *  enumerating an attached USB device.
 184  */
 185 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 186                                             const uint8_t SubErrorCode)
 187 {
 188         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 189                                  " -- Error Code %d\r\n"
 190                                  " -- Sub Error Code %d\r\n"
 191                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 192
 193         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 194 }