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

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

1 files changed, 292 insertions, 0 deletions

diff --git a/Projects/XPLAINBridge/XPLAINBridge.c b/Projects/XPLAINBridge/XPLAINBridge.c
new file mode 100644
index 0000000000..d901af819c
--- /dev/null
+++ b/Projects/XPLAINBridge/XPLAINBridge.c
@@ -0,0 +1,292 @@
+/*
+             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 XPLAINBridge project. This file contains the main tasks of
+ *  the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "XPLAINBridge.h"
+
+/** Current firmware mode, making the device behave as either a programmer or a USART bridge */
+bool CurrentFirmwareMode = MODE_USART_BRIDGE;
+
+/** LUFA CDC Class driver interface configuration and state information. This structure is
+ *  passed to all CDC Class driver functions, so that multiple instances of the same class
+ *  within a device can be differentiated from one another.
+ */
+USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
+	{
+		.Config =
+			{
+				.ControlInterfaceNumber         = INTERFACE_ID_CDC_CCI,
+				.DataINEndpoint                 =
+					{
+						.Address                = CDC_TX_EPADDR,
+						.Size                   = CDC_TXRX_EPSIZE,
+						.Banks                  = 1,
+					},
+				.DataOUTEndpoint                =
+					{
+						.Address                = CDC_RX_EPADDR,
+						.Size                   = CDC_TXRX_EPSIZE,
+						.Banks                  = 1,
+					},
+				.NotificationEndpoint           =
+					{
+						.Address                = CDC_NOTIFICATION_EPADDR,
+						.Size                   = CDC_NOTIFICATION_EPSIZE,
+						.Banks                  = 1,
+					},
+			},
+	};
+
+/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
+RingBuffer_t   USBtoUART_Buffer;
+
+/** Underlying data buffer for \ref USBtoUART_Buffer, where the stored bytes are located. */
+static uint8_t USBtoUART_Buffer_Data[128];
+
+/** Circular buffer to hold data from the serial port before it is sent to the host. */
+RingBuffer_t   UARTtoUSB_Buffer;
+
+/** Underlying data buffer for \ref UARTtoUSB_Buffer, where the stored bytes are located. */
+static uint8_t UARTtoUSB_Buffer_Data[128];
+
+
+/** 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 (;;)
+	{
+		if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+		  UARTBridge_Task();
+		else
+		  AVRISP_Task();
+
+		USB_USBTask();
+	}
+}
+
+void AVRISP_Task(void)
+{
+	/* Must be in the configured state for the AVRISP code to process data */
+	if (USB_DeviceState != DEVICE_STATE_Configured)
+	  return;
+
+	V2Params_UpdateParamValues();
+
+	Endpoint_SelectEndpoint(AVRISP_DATA_OUT_EPADDR);
+
+	/* Check to see if a V2 Protocol command has been received */
+	if (Endpoint_IsOUTReceived())
+	{
+		LEDs_SetAllLEDs(LEDMASK_BUSY);
+
+		/* Pass off processing of the V2 Protocol command to the V2 Protocol handler */
+		V2Protocol_ProcessCommand();
+
+		LEDs_SetAllLEDs(LEDMASK_USB_READY);
+	}
+}
+
+void UARTBridge_Task(void)
+{
+	/* Must be in the configured state for the USART Bridge code to process data */
+	if (USB_DeviceState != DEVICE_STATE_Configured)
+	  return;
+
+	/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+	if (!(RingBuffer_IsFull(&USBtoUART_Buffer)))
+	{
+		int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+
+		/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
+		if (!(ReceivedByte < 0))
+		  RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
+	}
+
+	/* Check if the UART receive buffer flush timer has expired or buffer is nearly full */
+	uint16_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);
+	if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
+	{
+		/* Clear flush timer expiry flag */
+		TIFR0 |= (1 << TOV0);
+
+		/* Read bytes from the USART receive buffer into the USB IN endpoint */
+		while (BufferCount--)
+		{
+			/* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
+			if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
+									RingBuffer_Peek(&UARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
+			{
+				break;
+			}
+
+			/* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
+			RingBuffer_Remove(&UARTtoUSB_Buffer);
+		}
+	}
+
+	CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+}
+
+/** 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);
+#endif
+
+	/* Disable JTAG debugging */
+	MCUCR |= (1 << JTD);
+	MCUCR |= (1 << JTD);
+
+	/* Enable pull-up on the JTAG TDI pin so we can use it to select the mode */
+	PORTF |= (1 << 7);
+	Delay_MS(10);
+
+	/* Select the firmware mode based on the JTD pin's value */
+	CurrentFirmwareMode = (PINF & (1 << 7)) ? MODE_USART_BRIDGE : MODE_PDI_PROGRAMMER;
+
+	/* Re-enable JTAG debugging */
+	MCUCR &= ~(1 << JTD);
+	MCUCR &= ~(1 << JTD);
+
+	/* Hardware Initialization */
+	SoftUART_Init();
+	LEDs_Init();
+	#if defined(RESET_TOGGLES_LIBUSB_COMPAT)
+	UpdateCurrentCompatibilityMode();
+	#endif
+
+	/* USB Stack Initialization */
+	USB_Init();
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	bool ConfigSuccess = true;
+
+	/* Configure the device endpoints according to the selected mode */
+	if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+	{
+		ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+
+		/* Configure the UART flush timer - run at Fcpu/1024 for maximum interval before overflow */
+		TCCR0B = ((1 << CS02) | (1 << CS00));
+
+		/* Initialize ring buffers used to hold serial data between USB and software UART interfaces */
+		RingBuffer_InitBuffer(&USBtoUART_Buffer, USBtoUART_Buffer_Data, sizeof(USBtoUART_Buffer_Data));
+		RingBuffer_InitBuffer(&UARTtoUSB_Buffer, UARTtoUSB_Buffer_Data, sizeof(UARTtoUSB_Buffer_Data));
+
+		/* Start the software USART */
+		SoftUART_Init();
+	}
+	else
+	{
+		ConfigSuccess &= Endpoint_ConfigureEndpoint(AVRISP_DATA_OUT_EPADDR, EP_TYPE_BULK, AVRISP_DATA_EPSIZE, 1);
+
+		if ((AVRISP_DATA_IN_EPADDR & ENDPOINT_EPNUM_MASK) != (AVRISP_DATA_OUT_EPADDR & ENDPOINT_EPNUM_MASK))
+		  ConfigSuccess &= Endpoint_ConfigureEndpoint(AVRISP_DATA_IN_EPADDR, EP_TYPE_BULK, AVRISP_DATA_EPSIZE, 1);
+
+		/* Configure the V2 protocol packet handler */
+		V2Protocol_Init();
+	}
+
+	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
+}
+
+/** Event handler for the library USB Control Request reception event. */
+void EVENT_USB_Device_ControlRequest(void)
+{
+	if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+	  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+}
+
+/** Event handler for the library USB Connection event. */
+void EVENT_USB_Device_Connect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Device_Disconnect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the CDC Class driver Line Encoding Changed event.
+ *
+ *  \param[in] CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced
+ */
+void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
+{
+	/* Change the software UART's baud rate to match the new baud rate */
+	SoftUART_SetBaud(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
+}
+
+/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
+ *  documentation) by the application code so that the address and size of a requested descriptor can be given
+ *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
+ *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
+ *  USB host.
+ *
+ *  \param[in]  wValue                 Descriptor type and index to retrieve
+ *  \param[in]  wIndex                 Sub-index to retrieve (such as a localized string language)
+ *  \param[out] DescriptorAddress      Address of the retrieved descriptor
+ *
+ *  \return Length of the retrieved descriptor in bytes, or NO_DESCRIPTOR if the descriptor was not found
+ */
+uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
+                                    const uint16_t wIndex,
+                                    const void** const DescriptorAddress)
+{
+	/* Return the correct descriptors based on the selected mode */
+	if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+	  return USART_GetDescriptor(wValue, wIndex, DescriptorAddress);
+	else
+	  return AVRISP_GetDescriptor(wValue, wIndex, DescriptorAddress);
+}
+