3 Copyright (C) Dean Camera, 2014.
5 dean [at] fourwalledcubicle [dot] com
10 Copyright 2014 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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.
21 The author disclaims 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
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.
37 #include "VirtualSerialHost.h"
39 /** Main program entry point. This routine configures the hardware required by the application, then
40 * enters a loop to run the application tasks in sequence.
46 puts_P(PSTR(ESC_FG_CYAN "CDC Host Demo running.\r\n" ESC_FG_WHITE));
48 LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
49 GlobalInterruptEnable();
59 /** Configures the board hardware and chip peripherals for the demo's functionality. */
60 void SetupHardware(void)
62 #if (ARCH == ARCH_AVR8)
63 /* Disable watchdog if enabled by bootloader/fuses */
64 MCUSR &= ~(1 << WDRF);
67 /* Disable clock division */
68 clock_prescale_set(clock_div_1);
71 /* Hardware Initialization */
72 Serial_Init(9600, false);
76 /* Create a stdio stream for the serial port for stdin and stdout */
77 Serial_CreateStream(NULL);
80 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
81 * starts the library USB task to begin the enumeration and USB management process.
83 void EVENT_USB_Host_DeviceAttached(void)
85 puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
86 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
89 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
90 * stops the library USB task management process.
92 void EVENT_USB_Host_DeviceUnattached(void)
94 puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
95 LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
98 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
99 * enumerated by the host and is now ready to be used by the application.
101 void EVENT_USB_Host_DeviceEnumerationComplete(void)
103 puts_P(PSTR("Getting Config Data.\r\n"));
107 /* Get and process the configuration descriptor data */
108 if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
110 if (ErrorCode == ControlError)
111 puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
113 puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
115 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
117 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
121 /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
122 if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
124 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
125 " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
127 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
131 CDC_LineEncoding_t LineEncoding = { .BaudRateBPS = 9600,
132 .CharFormat = CDC_LINEENCODING_OneStopBit,
133 .ParityType = CDC_PARITY_None,
136 USB_ControlRequest = (USB_Request_Header_t)
138 .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
139 .bRequest = CDC_REQ_SetLineEncoding,
142 .wLength = sizeof(LineEncoding),
145 /* Set the Line Encoding of the CDC interface within the device, so that it is ready to accept data */
146 Pipe_SelectPipe(PIPE_CONTROLPIPE);
147 if (USB_Host_SendControlRequest(&LineEncoding) != HOST_SENDCONTROL_Successful)
149 printf_P(PSTR(ESC_FG_RED "Control Error (Set Line Encoding).\r\n"
150 " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
152 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
156 puts_P(PSTR("CDC Device Enumerated.\r\n"));
157 LEDs_SetAllLEDs(LEDMASK_USB_READY);
160 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
161 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
165 printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
166 " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
168 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
172 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
173 * enumerating an attached USB device.
175 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
176 const uint8_t SubErrorCode)
178 printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
179 " -- Error Code %d\r\n"
180 " -- Sub Error Code %d\r\n"
181 " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
183 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
186 /** Task to read in data received from the attached CDC device and print it to the serial port.
188 void CDCHost_Task(void)
190 if (USB_HostState != HOST_STATE_Configured)
193 /* Select the data IN pipe */
194 Pipe_SelectPipe(CDC_DATA_IN_PIPE);
197 /* Check to see if a packet has been received */
198 if (Pipe_IsINReceived())
200 /* Re-freeze IN pipe after the packet has been received */
203 /* Check if data is in the pipe */
204 if (Pipe_IsReadWriteAllowed())
206 /* Get the length of the pipe data, and create a new buffer to hold it */
207 uint16_t BufferLength = Pipe_BytesInPipe();
208 uint8_t Buffer[BufferLength];
210 /* Read in the pipe data to the temporary buffer */
211 Pipe_Read_Stream_LE(Buffer, BufferLength, NULL);
213 /* Print out the buffer contents to the USART */
214 for (uint16_t BufferByte = 0; BufferByte < BufferLength; BufferByte++)
215 putchar(Buffer[BufferByte]);
218 /* Clear the pipe after it is read, ready for the next packet */
222 /* Re-freeze IN pipe after use */
225 /* Select and unfreeze the notification pipe */
226 Pipe_SelectPipe(CDC_NOTIFICATION_PIPE);
229 /* Check if a packet has been received */
230 if (Pipe_IsINReceived())
232 /* Discard the unused event notification */
236 /* Freeze notification IN pipe after use */