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
  69         for (;;)
  70         {
  71                 switch (USB_HostState)
  72                 {
  73                         case HOST_STATE_Addressed:
  74                                 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  75
  76                                 uint16_t ConfigDescriptorSize;
  77                                 uint8_t  ConfigDescriptorData[512];
  78
  79                                 if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
  80                                                                        sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
  81                                 {
  82                                         printf("Error Retrieving Configuration Descriptor.\r\n");
  83                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  84                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  85                                         break;
  86                                 }
  87
  88                                 if (CDC_Host_ConfigurePipes(&VirtualSerial_CDC_Interface,
  89                                                             ConfigDescriptorSize, ConfigDescriptorData) != CDC_ENUMERROR_NoError)
  90                                 {
  91                                         printf("Attached Device Not a Valid CDC Class Device.\r\n");
  92                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  93                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  94                                         break;
  95                                 }
  96
  97                                 if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
  98                                 {
  99                                         printf("Error Setting Device Configuration.\r\n");
 100                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 101                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 102                                         break;
 103                                 }
 104
 105                                 printf("CDC Device Enumerated.\r\n");
 106                                 USB_HostState = HOST_STATE_Configured;
 107                                 break;
 108                         case HOST_STATE_Configured:
 109                                 if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 110                                 {
 111                                         /* Echo received bytes from the attached device through the USART */
 112                                         while (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 113                                           putchar(CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface));
 114
 115                                         CDC_Host_Flush(&VirtualSerial_CDC_Interface);
 116                                 }
 117
 118                                 break;
 119                 }
 120
 121                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
 122                 USB_USBTask();
 123         }
 124 }
 125
 126 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 127 void SetupHardware(void)
 128 {
 129         /* Disable watchdog if enabled by bootloader/fuses */
 130         MCUSR &= ~(1 << WDRF);
 131         wdt_disable();
 132
 133         /* Disable clock division */
 134         clock_prescale_set(clock_div_1);
 135
 136         /* Hardware Initialization */
 137         SerialStream_Init(9600, false);
 138         LEDs_Init();
 139         USB_Init();
 140 }
 141
 142 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 143  *  starts the library USB task to begin the enumeration and USB management process.
 144  */
 145 void EVENT_USB_Host_DeviceAttached(void)
 146 {
 147         puts_P(PSTR("Device Attached.\r\n"));
 148         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 149 }
 150
 151 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 152  *  stops the library USB task management process.
 153  */
 154 void EVENT_USB_Host_DeviceUnattached(void)
 155 {
 156         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 157         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 158 }
 159
 160 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 161  *  enumerated by the host and is now ready to be used by the application.
 162  */
 163 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 164 {
 165         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 166 }
 167
 168 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 169 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 170 {
 171         USB_ShutDown();
 172
 173         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 174                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 175
 176         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 177         for(;;);
 178 }
 179
 180 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 181  *  enumerating an attached USB device.
 182  */
 183 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
 184 {
 185         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 186                                  " -- Error Code %d\r\n"
 187                                  " -- Sub Error Code %d\r\n"
 188                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 189
 190         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 191 }