Demos/Host/ClassDriver/VirtualSerialHost/VirtualSerialHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  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
  59 /** Main program entry point. This routine configures the hardware required by the application, then
  60  *  enters a loop to run the application tasks in sequence.
  61  */
  62 int main(void)
  63 {
  64         SetupHardware();
  65
  66         puts_P(PSTR(ESC_FG_CYAN "CDC Host Demo running.\r\n" ESC_FG_WHITE));
  67
  68         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  69         sei();
  70
  71         for (;;)
  72         {
  73                 CDCHost_Task();
  74
  75                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
  76                 USB_USBTask();
  77         }
  78 }
  79
  80 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  81 void SetupHardware(void)
  82 {
  83         /* Disable watchdog if enabled by bootloader/fuses */
  84         MCUSR &= ~(1 << WDRF);
  85         wdt_disable();
  86
  87         /* Disable clock division */
  88         clock_prescale_set(clock_div_1);
  89
  90         /* Hardware Initialization */
  91         Serial_Init(9600, false);
  92         LEDs_Init();
  93         USB_Init();
  94
  95         /* Create a stdio stream for the serial port for stdin and stdout */
  96         Serial_CreateStream(NULL);
  97 }
  98
  99 /** Task to manage an enumerated USB CDC device once connected, to print received data
 100  *  from the device to the serial port.
 101  */
 102 void CDCHost_Task(void)
 103 {
 104         if (USB_HostState != HOST_STATE_Configured)
 105           return;
 106
 107         if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 108         {
 109                 /* Echo received bytes from the attached device through the USART */
 110                 int16_t ReceivedByte = CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface);
 111                 if (!(ReceivedByte < 0))
 112                   putchar(ReceivedByte);
 113         }
 114 }
 115
 116 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 117  *  starts the library USB task to begin the enumeration and USB management process.
 118  */
 119 void EVENT_USB_Host_DeviceAttached(void)
 120 {
 121         puts_P(PSTR("Device Attached.\r\n"));
 122         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 123 }
 124
 125 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 126  *  stops the library USB task management process.
 127  */
 128 void EVENT_USB_Host_DeviceUnattached(void)
 129 {
 130         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 131         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 132 }
 133
 134 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 135  *  enumerated by the host and is now ready to be used by the application.
 136  */
 137 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 138 {
 139         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 140
 141         uint16_t ConfigDescriptorSize;
 142         uint8_t  ConfigDescriptorData[512];
 143
 144         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 145                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 146         {
 147                 puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
 148                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 149                 return;
 150         }
 151
 152         if (CDC_Host_ConfigurePipes(&VirtualSerial_CDC_Interface,
 153                                     ConfigDescriptorSize, ConfigDescriptorData) != CDC_ENUMERROR_NoError)
 154         {
 155                 puts_P(PSTR("Attached Device Not a Valid CDC Class Device.\r\n"));
 156                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 157                 return;
 158         }
 159
 160         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 161         {
 162                 puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 163                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 164                 return;
 165         }
 166
 167         puts_P(PSTR("CDC Device Enumerated.\r\n"));
 168         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 169 }
 170
 171 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 172 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 173 {
 174         USB_Disable();
 175
 176         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 177                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 178
 179         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 180         for(;;);
 181 }
 182
 183 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 184  *  enumerating an attached USB device.
 185  */
 186 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 187                                             const uint8_t SubErrorCode)
 188 {
 189         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 190                                  " -- Error Code %d\r\n"
 191                                  " -- Sub Error Code %d\r\n"
 192                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 193
 194         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 195 }
 196