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