Squashed 'lib/lufa/' content from commit 385d40300

git-subtree-dir: lib/lufa
git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b

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diff --git a/Demos/Device/LowLevel/VirtualSerial/VirtualSerial.c b/Demos/Device/LowLevel/VirtualSerial/VirtualSerial.c
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+++ b/Demos/Device/LowLevel/VirtualSerial/VirtualSerial.c
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+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Main source file for the VirtualSerial demo. This file contains the main tasks of the demo and
+ *  is responsible for the initial application hardware configuration.
+ */
+
+#include "VirtualSerial.h"
+
+/** Contains the current baud rate and other settings of the virtual serial port. While this demo does not use
+ *  the physical USART and thus does not use these settings, they must still be retained and returned to the host
+ *  upon request or the host will assume the device is non-functional.
+ *
+ *  These values are set by the host via a class-specific request, however they are not required to be used accurately.
+ *  It is possible to completely ignore these value or use other settings as the host is completely unaware of the physical
+ *  serial link characteristics and instead sends and receives data in endpoint streams.
+ */
+static CDC_LineEncoding_t LineEncoding = { .BaudRateBPS = 0,
+                                           .CharFormat  = CDC_LINEENCODING_OneStopBit,
+                                           .ParityType  = CDC_PARITY_None,
+                                           .DataBits    = 8                            };
+
+
+/** Main program entry point. This routine contains the overall program flow, including initial
+ *  setup of all components and the main program loop.
+ */
+int main(void)
+{
+	SetupHardware();
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+	GlobalInterruptEnable();
+
+	for (;;)
+	{
+		CDC_Task();
+		USB_USBTask();
+	}
+}
+
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
+{
+#if (ARCH == ARCH_AVR8)
+	/* Disable watchdog if enabled by bootloader/fuses */
+	MCUSR &= ~(1 << WDRF);
+	wdt_disable();
+
+	/* Disable clock division */
+	clock_prescale_set(clock_div_1);
+#elif (ARCH == ARCH_XMEGA)
+	/* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
+	XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
+	XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
+
+	/* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
+	XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
+	XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
+
+	PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
+#endif
+
+	/* Hardware Initialization */
+	Joystick_Init();
+	LEDs_Init();
+	USB_Init();
+}
+
+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
+ *  starts the library USB task to begin the enumeration and USB management process.
+ */
+void EVENT_USB_Device_Connect(void)
+{
+	/* Indicate USB enumerating */
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
+ *  the status LEDs and stops the USB management and CDC management tasks.
+ */
+void EVENT_USB_Device_Disconnect(void)
+{
+	/* Indicate USB not ready */
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
+ *  of the USB device after enumeration - the device endpoints are configured and the CDC management task started.
+ */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	bool ConfigSuccess = true;
+
+	/* Setup CDC Data Endpoints */
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_EPSIZE, 1);
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_RX_EPADDR, EP_TYPE_BULK,  CDC_TXRX_EPSIZE, 1);
+
+	/* Reset line encoding baud rate so that the host knows to send new values */
+	LineEncoding.BaudRateBPS = 0;
+
+	/* Indicate endpoint configuration success or failure */
+	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
+}
+
+/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
+ *  the device from the USB host before passing along unhandled control requests to the library for processing
+ *  internally.
+ */
+void EVENT_USB_Device_ControlRequest(void)
+{
+	/* Process CDC specific control requests */
+	switch (USB_ControlRequest.bRequest)
+	{
+		case CDC_REQ_GetLineEncoding:
+			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
+			{
+				Endpoint_ClearSETUP();
+
+				/* Write the line coding data to the control endpoint */
+				Endpoint_Write_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
+				Endpoint_ClearOUT();
+			}
+
+			break;
+		case CDC_REQ_SetLineEncoding:
+			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
+			{
+				Endpoint_ClearSETUP();
+
+				/* Read the line coding data in from the host into the global struct */
+				Endpoint_Read_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
+				Endpoint_ClearIN();
+			}
+
+			break;
+		case CDC_REQ_SetControlLineState:
+			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
+			{
+				Endpoint_ClearSETUP();
+				Endpoint_ClearStatusStage();
+
+				/* NOTE: Here you can read in the line state mask from the host, to get the current state of the output handshake
+				         lines. The mask is read in from the wValue parameter in USB_ControlRequest, and can be masked against the
+						 CONTROL_LINE_OUT_* masks to determine the RTS and DTR line states using the following code:
+				*/
+			}
+
+			break;
+	}
+}
+
+/** Function to manage CDC data transmission and reception to and from the host. */
+void CDC_Task(void)
+{
+	char*       ReportString    = NULL;
+	uint8_t     JoyStatus_LCL   = Joystick_GetStatus();
+	static bool ActionSent      = false;
+
+	/* Device must be connected and configured for the task to run */
+	if (USB_DeviceState != DEVICE_STATE_Configured)
+	  return;
+
+	/* Determine if a joystick action has occurred */
+	if (JoyStatus_LCL & JOY_UP)
+	  ReportString = "Joystick Up\r\n";
+	else if (JoyStatus_LCL & JOY_DOWN)
+	  ReportString = "Joystick Down\r\n";
+	else if (JoyStatus_LCL & JOY_LEFT)
+	  ReportString = "Joystick Left\r\n";
+	else if (JoyStatus_LCL & JOY_RIGHT)
+	  ReportString = "Joystick Right\r\n";
+	else if (JoyStatus_LCL & JOY_PRESS)
+	  ReportString = "Joystick Pressed\r\n";
+	else
+	  ActionSent = false;
+
+	/* Flag management - Only allow one string to be sent per action */
+	if ((ReportString != NULL) && (ActionSent == false) && LineEncoding.BaudRateBPS)
+	{
+		ActionSent = true;
+
+		/* Select the Serial Tx Endpoint */
+		Endpoint_SelectEndpoint(CDC_TX_EPADDR);
+
+		/* Write the String to the Endpoint */
+		Endpoint_Write_Stream_LE(ReportString, strlen(ReportString), NULL);
+
+		/* Remember if the packet to send completely fills the endpoint */
+		bool IsFull = (Endpoint_BytesInEndpoint() == CDC_TXRX_EPSIZE);
+
+		/* Finalize the stream transfer to send the last packet */
+		Endpoint_ClearIN();
+
+		/* If the last packet filled the endpoint, send an empty packet to release the buffer on
+		 * the receiver (otherwise all data will be cached until a non-full packet is received) */
+		if (IsFull)
+		{
+			/* Wait until the endpoint is ready for another packet */
+			Endpoint_WaitUntilReady();
+
+			/* Send an empty packet to ensure that the host does not buffer data sent to it */
+			Endpoint_ClearIN();
+		}
+	}
+
+	/* Select the Serial Rx Endpoint */
+	Endpoint_SelectEndpoint(CDC_RX_EPADDR);
+
+	/* Throw away any received data from the host */
+	if (Endpoint_IsOUTReceived())
+	  Endpoint_ClearOUT();
+}
+