Demos/Host/ClassDriver/CDCHost/CDCHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 CDCHost demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "CDCHost.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                                 .DataOUTPipeNumber      = 2,
  49                                 .NotificationPipeNumber = 3,
  50                         },
  51         };
  52
  53
  54 /** Main program entry point. This routine configures the hardware required by the application, then
  55  *  starts the scheduler to run the application tasks.
  56  */
  57 int main(void)
  58 {
  59         SetupHardware();
  60
  61         puts_P(PSTR(ESC_FG_CYAN "CDC Host Demo running.\r\n" ESC_FG_WHITE));
  62
  63         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  64
  65         for (;;)
  66         {
  67                 switch (USB_HostState)
  68                 {
  69                         case HOST_STATE_Addressed:
  70                                 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  71
  72                                 uint16_t ConfigDescriptorSize;
  73                                 uint8_t  ConfigDescriptorData[512];
  74
  75                                 if ((USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful) ||
  76                                     (ConfigDescriptorSize > sizeof(ConfigDescriptorData)) ||
  77                                         (USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData)))
  78                                 {
  79                                         printf("Error Retrieving Configuration Descriptor.\r\n");
  80                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  81                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  82                                         break;
  83                                 }
  84
  85                                 if (CDC_Host_ConfigurePipes(&VirtualSerial_CDC_Interface,
  86                                                             ConfigDescriptorSize, ConfigDescriptorData) != CDC_ENUMERROR_NoError)
  87                                 {
  88                                         printf("Attached Device Not a Valid CDC Class Device.\r\n");
  89                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  90                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  91                                         break;
  92                                 }
  93
  94                                 if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
  95                                 {
  96                                         printf("Error Setting Device Configuration.\r\n");
  97                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  98                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  99                                         break;
 100                                 }
 101
 102                                 printf("CDC Device Enumerated.\r\n");
 103                                 USB_HostState = HOST_STATE_Configured;
 104                                 break;
 105                         case HOST_STATE_Configured:
 106                                 if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 107                                 {
 108                                         /* Echo received bytes from the attached device through the USART */
 109                                         while (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 110                                           putchar(CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface));
 111                                 }
 112
 113                                 break;
 114                 }
 115
 116                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
 117                 USB_USBTask();
 118         }
 119 }
 120
 121 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 122 void SetupHardware(void)
 123 {
 124         /* Disable watchdog if enabled by bootloader/fuses */
 125         MCUSR &= ~(1 << WDRF);
 126         wdt_disable();
 127
 128         /* Disable clock division */
 129         clock_prescale_set(clock_div_1);
 130
 131         /* Hardware Initialization */
 132         SerialStream_Init(9600, false);
 133         LEDs_Init();
 134         USB_Init();
 135 }
 136
 137 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 138  *  starts the library USB task to begin the enumeration and USB management process.
 139  */
 140 void EVENT_USB_Host_DeviceAttached(void)
 141 {
 142         puts_P(PSTR("Device Attached.\r\n"));
 143         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 144 }
 145
 146 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 147  *  stops the library USB task management process.
 148  */
 149 void EVENT_USB_Host_DeviceUnattached(void)
 150 {
 151         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 152         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 153 }
 154
 155 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 156  *  enumerated by the host and is now ready to be used by the application.
 157  */
 158 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 159 {
 160         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 161 }
 162
 163 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 164 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 165 {
 166         USB_ShutDown();
 167
 168         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 169                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 170
 171         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 172         for(;;);
 173 }
 174
 175 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 176  *  enumerating an attached USB device.
 177  */
 178 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
 179 {
 180         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 181                                  " -- Error Code %d\r\n"
 182                                  " -- Sub Error Code %d\r\n"
 183                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 184
 185         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 186 }