Demos/Host/ClassDriver/VirtualSerialHost/VirtualSerialHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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                 switch (USB_HostState)
  74                 {
  75                         case HOST_STATE_Addressed:
  76                                 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  77
  78                                 uint16_t ConfigDescriptorSize;
  79                                 uint8_t  ConfigDescriptorData[512];
  80
  81                                 if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
  82                                                                        sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
  83                                 {
  84                                         puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
  85                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  86                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  87                                         break;
  88                                 }
  89
  90                                 if (CDC_Host_ConfigurePipes(&VirtualSerial_CDC_Interface,
  91                                                             ConfigDescriptorSize, ConfigDescriptorData) != CDC_ENUMERROR_NoError)
  92                                 {
  93                                         puts_P(PSTR("Attached Device Not a Valid CDC Class Device.\r\n"));
  94                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  95                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  96                                         break;
  97                                 }
  98
  99                                 if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 100                                 {
 101                                         puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 102                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 103                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 104                                         break;
 105                                 }
 106
 107                                 puts_P(PSTR("CDC Device Enumerated.\r\n"));
 108                                 LEDs_SetAllLEDs(LEDMASK_USB_READY);
 109                                 USB_HostState = HOST_STATE_Configured;
 110                                 break;
 111                         case HOST_STATE_Configured:
 112                                 if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
 113                                 {
 114                                         /* Echo received bytes from the attached device through the USART */
 115                                         int16_t ReceivedByte = CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface);
 116                                         if (!(ReceivedByte < 0))
 117                                           putchar(ReceivedByte);
 118                                 }
 119
 120                                 break;
 121                 }
 122
 123                 CDC_Host_USBTask(&VirtualSerial_CDC_Interface);
 124                 USB_USBTask();
 125         }
 126 }
 127
 128 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 129 void SetupHardware(void)
 130 {
 131         /* Disable watchdog if enabled by bootloader/fuses */
 132         MCUSR &= ~(1 << WDRF);
 133         wdt_disable();
 134
 135         /* Disable clock division */
 136         clock_prescale_set(clock_div_1);
 137
 138         /* Hardware Initialization */
 139         Serial_Init(9600, false);
 140         LEDs_Init();
 141         USB_Init();
 142
 143         /* Create a stdio stream for the serial port for stdin and stdout */
 144         Serial_CreateStream(NULL);
 145 }
 146
 147 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 148  *  starts the library USB task to begin the enumeration and USB management process.
 149  */
 150 void EVENT_USB_Host_DeviceAttached(void)
 151 {
 152         puts_P(PSTR("Device Attached.\r\n"));
 153         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 154 }
 155
 156 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 157  *  stops the library USB task management process.
 158  */
 159 void EVENT_USB_Host_DeviceUnattached(void)
 160 {
 161         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 162         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 163 }
 164
 165 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 166  *  enumerated by the host and is now ready to be used by the application.
 167  */
 168 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 169 {
 170         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 171 }
 172
 173 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 174 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 175 {
 176         USB_Disable();
 177
 178         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 179                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 180
 181         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 182         for(;;);
 183 }
 184
 185 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 186  *  enumerating an attached USB device.
 187  */
 188 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 189                                             const uint8_t SubErrorCode)
 190 {
 191         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 192                                  " -- Error Code %d\r\n"
 193                                  " -- Sub Error Code %d\r\n"
 194                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 195
 196         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 197 }
 198