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 #if 0
  59 /* NOTE: Here you can set up a standard stream using the created virtual serial port, so that the standard stream functions in
  60  *       <stdio.h> can be used on the virtual serial port (e.g. fprintf(&USBSerial, "Test"); to print a string).
  61  */
  62
  63 static int CDC_putchar(char c, FILE *stream)
  64 {
  65         CDC_Host_SendByte(&VirtualSerial_CDC_Interface, c);
  66         return 0;
  67 }
  68
  69 static int CDC_getchar(FILE *stream)
  70 {
  71         if (!(CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface)))
  72           return -1;
  73
  74         return CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface);
  75 }
  76
  77 static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);
  78 #endif
  79
  80 /** Main program entry point. This routine configures the hardware required by the application, then
  81  *  enters a loop to run the application tasks in sequence.
  82  */
  83 int main(void)
  84 {
  85         SetupHardware();
  86
  87         puts_P(PSTR(ESC_FG_CYAN "CDC Host Demo running.\r\n" ESC_FG_WHITE));
  88
  89         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  90
  91         for (;;)
  92         {
  93                 switch (USB_HostState)
  94                 {
  95                         case HOST_STATE_Addressed:
  96                                 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  97
  98                                 uint16_t ConfigDescriptorSize;
  99                                 uint8_t  ConfigDescriptorData[512];
 100
 101                                 if (USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 102                                                                   sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 103                                 {
 104                                         printf("Error Retrieving Configuration Descriptor.\r\n");
 105                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 106                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 107                                         break;
 108                                 }
 109
 110                                 if (CDC_Host_ConfigurePipes(&VirtualSerial_CDC_Interface,
 111                                                             ConfigDescriptorSize, ConfigDescriptorData) != CDC_ENUMERROR_NoError)
 112                                 {
 113                                         printf("Attached Device Not a Valid CDC Class Device.\r\n");
 114                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 115                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 116                                         break;
 117                                 }
 118
 119                                 if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 120                                 {
 121                                         printf("Error Setting Device Configuration.\r\n");
 122                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 123                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 124                                         break;
 125                                 }
 126
 127                                 printf("CDC Device Enumerated.\r\n");
 128                                 USB_HostState = HOST_STATE_Configured;
 129                                 break;
 130                         case HOST_STATE_Configured:
 131                                 if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 132                                 {
 133                                         /* Echo received bytes from the attached device through the USART */
 134                                         while (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 135                                           putchar(CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface));
 136                                 }
 137
 138                                 break;
 139                 }
 140
 141                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
 142                 USB_USBTask();
 143         }
 144 }
 145
 146 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 147 void SetupHardware(void)
 148 {
 149         /* Disable watchdog if enabled by bootloader/fuses */
 150         MCUSR &= ~(1 << WDRF);
 151         wdt_disable();
 152
 153         /* Disable clock division */
 154         clock_prescale_set(clock_div_1);
 155
 156         /* Hardware Initialization */
 157         SerialStream_Init(9600, false);
 158         LEDs_Init();
 159         USB_Init();
 160 }
 161
 162 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 163  *  starts the library USB task to begin the enumeration and USB management process.
 164  */
 165 void EVENT_USB_Host_DeviceAttached(void)
 166 {
 167         puts_P(PSTR("Device Attached.\r\n"));
 168         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 169 }
 170
 171 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 172  *  stops the library USB task management process.
 173  */
 174 void EVENT_USB_Host_DeviceUnattached(void)
 175 {
 176         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 177         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 178 }
 179
 180 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 181  *  enumerated by the host and is now ready to be used by the application.
 182  */
 183 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 184 {
 185         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 186 }
 187
 188 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 189 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 190 {
 191         USB_ShutDown();
 192
 193         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 194                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 195
 196         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 197         for(;;);
 198 }
 199
 200 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 201  *  enumerating an attached USB device.
 202  */
 203 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
 204 {
 205         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 206                                  " -- Error Code %d\r\n"
 207                                  " -- Sub Error Code %d\r\n"
 208                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 209
 210         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 211 }