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232 lines
8.0 KiB
232 lines
8.0 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2012.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Main source file for the VirtualSerial demo. This file contains the main tasks of the demo and
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* is responsible for the initial application hardware configuration.
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*/
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#include "VirtualSerial.h"
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/** Contains the current baud rate and other settings of the virtual serial port. While this demo does not use
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* the physical USART and thus does not use these settings, they must still be retained and returned to the host
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* upon request or the host will assume the device is non-functional.
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*
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* These values are set by the host via a class-specific request, however they are not required to be used accurately.
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* It is possible to completely ignore these value or use other settings as the host is completely unaware of the physical
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* serial link characteristics and instead sends and receives data in endpoint streams.
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*/
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static CDC_LineEncoding_t LineEncoding = { .BaudRateBPS = 0,
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.CharFormat = CDC_LINEENCODING_OneStopBit,
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.ParityType = CDC_PARITY_None,
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.DataBits = 8 };
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/** Main program entry point. This routine contains the overall program flow, including initial
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* setup of all components and the main program loop.
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*/
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int main(void)
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{
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SetupHardware();
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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sei();
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for (;;)
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{
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CDC_Task();
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USB_USBTask();
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}
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}
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/** Configures the board hardware and chip peripherals for the demo's functionality. */
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void SetupHardware(void)
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{
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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wdt_disable();
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/* Disable clock division */
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clock_prescale_set(clock_div_1);
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/* Hardware Initialization */
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Joystick_Init();
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LEDs_Init();
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USB_Init();
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}
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/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
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* starts the library USB task to begin the enumeration and USB management process.
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*/
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void EVENT_USB_Device_Connect(void)
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{
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/* Indicate USB enumerating */
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LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
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}
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/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
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* the status LEDs and stops the USB management and CDC management tasks.
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*/
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void EVENT_USB_Device_Disconnect(void)
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{
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/* Indicate USB not ready */
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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}
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/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
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* of the USB device after enumeration - the device endpoints are configured and the CDC management task started.
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*/
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void EVENT_USB_Device_ConfigurationChanged(void)
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{
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bool ConfigSuccess = true;
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/* Setup CDC Data Endpoints */
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ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_EPSIZE, 1);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
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/* Reset line encoding baud rate so that the host knows to send new values */
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LineEncoding.BaudRateBPS = 0;
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/* Indicate endpoint configuration success or failure */
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LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
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}
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/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
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* the device from the USB host before passing along unhandled control requests to the library for processing
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* internally.
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*/
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void EVENT_USB_Device_ControlRequest(void)
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{
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/* Process CDC specific control requests */
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switch (USB_ControlRequest.bRequest)
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{
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case CDC_REQ_GetLineEncoding:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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/* Write the line coding data to the control endpoint */
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Endpoint_Write_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
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Endpoint_ClearOUT();
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}
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break;
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case CDC_REQ_SetLineEncoding:
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if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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/* Read the line coding data in from the host into the global struct */
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Endpoint_Read_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
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Endpoint_ClearIN();
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}
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break;
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case CDC_REQ_SetControlLineState:
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if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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Endpoint_ClearStatusStage();
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/* NOTE: Here you can read in the line state mask from the host, to get the current state of the output handshake
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lines. The mask is read in from the wValue parameter in USB_ControlRequest, and can be masked against the
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CONTROL_LINE_OUT_* masks to determine the RTS and DTR line states using the following code:
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*/
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}
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break;
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}
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}
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/** Function to manage CDC data transmission and reception to and from the host. */
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void CDC_Task(void)
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{
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char* ReportString = NULL;
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uint8_t JoyStatus_LCL = Joystick_GetStatus();
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static bool ActionSent = false;
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/* Device must be connected and configured for the task to run */
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if (USB_DeviceState != DEVICE_STATE_Configured)
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return;
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/* Determine if a joystick action has occurred */
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if (JoyStatus_LCL & JOY_UP)
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ReportString = "Joystick Up\r\n";
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else if (JoyStatus_LCL & JOY_DOWN)
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ReportString = "Joystick Down\r\n";
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else if (JoyStatus_LCL & JOY_LEFT)
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ReportString = "Joystick Left\r\n";
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else if (JoyStatus_LCL & JOY_RIGHT)
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ReportString = "Joystick Right\r\n";
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else if (JoyStatus_LCL & JOY_PRESS)
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ReportString = "Joystick Pressed\r\n";
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else
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ActionSent = false;
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/* Flag management - Only allow one string to be sent per action */
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if ((ReportString != NULL) && (ActionSent == false) && LineEncoding.BaudRateBPS)
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{
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ActionSent = true;
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/* Select the Serial Tx Endpoint */
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Endpoint_SelectEndpoint(CDC_TX_EPADDR);
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/* Write the String to the Endpoint */
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Endpoint_Write_Stream_LE(ReportString, strlen(ReportString), NULL);
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/* Remember if the packet to send completely fills the endpoint */
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bool IsFull = (Endpoint_BytesInEndpoint() == CDC_TXRX_EPSIZE);
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearIN();
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/* If the last packet filled the endpoint, send an empty packet to release the buffer on
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* the receiver (otherwise all data will be cached until a non-full packet is received) */
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if (IsFull)
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{
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/* Wait until the endpoint is ready for another packet */
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Endpoint_WaitUntilReady();
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/* Send an empty packet to ensure that the host does not buffer data sent to it */
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Endpoint_ClearIN();
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}
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}
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/* Select the Serial Rx Endpoint */
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Endpoint_SelectEndpoint(CDC_RX_EPADDR);
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/* Throw away any received data from the host */
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if (Endpoint_IsOUTReceived())
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Endpoint_ClearOUT();
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}
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