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 #if 0
  54 /* NOTE: Here you can set up a standard stream using the created virtual serial port, so that the standard stream functions in
  55  *       <stdio.h> can be used on the virtual serial port (e.g. fprintf(&USBSerial, "Test"); to print a string).
  56  */
  57
  58 static int CDC_putchar(char c, FILE *stream)
  59 {
  60         CDC_Host_SendByte(&VirtualSerial_CDC_Interface, c);
  61         return 0;
  62 }
  63
  64 static int CDC_getchar(FILE *stream)
  65 {
  66         if (!(CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface)))
  67           return -1;
  68
  69         return CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface);
  70 }
  71
  72 static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);
  73 #endif
  74
  75 /** Main program entry point. This routine configures the hardware required by the application, then
  76  *  enters a loop to run the application tasks in sequence.
  77  */
  78 int main(void)
  79 {
  80         SetupHardware();
  81
  82         puts_P(PSTR(ESC_FG_CYAN "CDC Host Demo running.\r\n" ESC_FG_WHITE));
  83
  84         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  85
  86         for (;;)
  87         {
  88                 switch (USB_HostState)
  89                 {
  90                         case HOST_STATE_Addressed:
  91                                 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  92
  93                                 uint16_t ConfigDescriptorSize;
  94                                 uint8_t  ConfigDescriptorData[512];
  95
  96                                 if (USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
  97                                                                   sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
  98                                 {
  99                                         printf("Error Retrieving Configuration Descriptor.\r\n");
 100                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 101                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 102                                         break;
 103                                 }
 104
 105                                 if (CDC_Host_ConfigurePipes(&VirtualSerial_CDC_Interface,
 106                                                             ConfigDescriptorSize, ConfigDescriptorData) != CDC_ENUMERROR_NoError)
 107                                 {
 108                                         printf("Attached Device Not a Valid CDC Class Device.\r\n");
 109                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 110                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 111                                         break;
 112                                 }
 113
 114                                 if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 115                                 {
 116                                         printf("Error Setting Device Configuration.\r\n");
 117                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 118                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 119                                         break;
 120                                 }
 121
 122                                 printf("CDC Device Enumerated.\r\n");
 123                                 USB_HostState = HOST_STATE_Configured;
 124                                 break;
 125                         case HOST_STATE_Configured:
 126                                 if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 127                                 {
 128                                         /* Echo received bytes from the attached device through the USART */
 129                                         while (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 130                                           putchar(CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface));
 131                                 }
 132
 133                                 break;
 134                 }
 135
 136                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
 137                 USB_USBTask();
 138         }
 139 }
 140
 141 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 142 void SetupHardware(void)
 143 {
 144         /* Disable watchdog if enabled by bootloader/fuses */
 145         MCUSR &= ~(1 << WDRF);
 146         wdt_disable();
 147
 148         /* Disable clock division */
 149         clock_prescale_set(clock_div_1);
 150
 151         /* Hardware Initialization */
 152         SerialStream_Init(9600, false);
 153         LEDs_Init();
 154         USB_Init();
 155 }
 156
 157 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 158  *  starts the library USB task to begin the enumeration and USB management process.
 159  */
 160 void EVENT_USB_Host_DeviceAttached(void)
 161 {
 162         puts_P(PSTR("Device Attached.\r\n"));
 163         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 164 }
 165
 166 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 167  *  stops the library USB task management process.
 168  */
 169 void EVENT_USB_Host_DeviceUnattached(void)
 170 {
 171         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 172         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 173 }
 174
 175 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 176  *  enumerated by the host and is now ready to be used by the application.
 177  */
 178 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 179 {
 180         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 181 }
 182
 183 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 184 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 185 {
 186         USB_ShutDown();
 187
 188         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 189                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 190
 191         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 192         for(;;);
 193 }
 194
 195 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 196  *  enumerating an attached USB device.
 197  */
 198 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
 199 {
 200         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 201                                  " -- Error Code %d\r\n"
 202                                  " -- Sub Error Code %d\r\n"
 203                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 204
 205         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 206 }