Merge commit '60b30c036397cb5627fa374bb930794b225daa29' as 'lib/lufa'

1 files changed, 170 insertions, 0 deletions

diff --git a/lib/lufa/Projects/SerialToLCD/SerialToLCD.c b/lib/lufa/Projects/SerialToLCD/SerialToLCD.c
new file mode 100644
index 0000000000..85abbdb50d
--- /dev/null
+++ b/lib/lufa/Projects/SerialToLCD/SerialToLCD.c
@@ -0,0 +1,170 @@
+/*
+             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)
+  Copyright 2012  Simon Foster (simon.foster [at] inbox [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 SerialToLCD program. This file contains the main tasks of
+ *  the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "SerialToLCD.h"
+
+/** Circular buffer to hold data from the host before it is sent to the LCD */
+static RingBuffer_t FromHost_Buffer;
+
+/** Underlying data buffer for \ref FromHost_Buffer, where the stored bytes are located. */
+static uint8_t      FromHost_Buffer_Data[128];
+
+/** 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,
+					},
+			},
+	};
+
+
+/** 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();
+
+	RingBuffer_InitBuffer(&FromHost_Buffer, FromHost_Buffer_Data, sizeof(FromHost_Buffer_Data));
+
+	GlobalInterruptEnable();
+
+	for (;;)
+	{
+		/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+		if (!(RingBuffer_IsFull(&FromHost_Buffer)))
+		{
+			int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+
+			/* Read bytes from the USB OUT endpoint into the USART transmit buffer */
+			if (!(ReceivedByte < 0))
+			  RingBuffer_Insert(&FromHost_Buffer, ReceivedByte);
+		}
+
+		while (RingBuffer_GetCount(&FromHost_Buffer) > 0)
+		{
+			static uint8_t EscapePending = 0;
+			int16_t HD44780Byte = RingBuffer_Remove(&FromHost_Buffer);
+
+			if (HD44780Byte == COMMAND_ESCAPE)
+			{
+				if (EscapePending)
+				{
+					HD44780_WriteData(HD44780Byte);
+					EscapePending = 0;
+				}
+				else
+				{
+					/* Next received character is the command byte */
+					EscapePending = 1;
+				}
+			}
+			else
+			{
+				if (EscapePending)
+				{
+					HD44780_WriteCommand(HD44780Byte);
+					EscapePending = 0;
+				}
+				else
+				{
+					HD44780_WriteData(HD44780Byte);
+				}
+			}
+		}
+
+		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+		USB_USBTask();
+	}
+}
+
+/** Configures the board hardware and chip peripherals for the application'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
+
+	/* Hardware Initialization */
+	USB_Init();
+
+	/* Power up the HD44780 Interface */
+	HD44780_Initialize();
+	HD44780_WriteCommand(CMD_DISPLAY_ON);
+
+	/* Start the flush timer so that overflows occur rapidly to push received bytes to the USB interface */
+	TCCR0B = (1 << CS02);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+}
+
+/** Event handler for the library USB Control Request reception event. */
+void EVENT_USB_Device_ControlRequest(void)
+{
+	CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+}