Merged upstream arduino branch

1 files changed, 242 insertions, 0 deletions

diff --git a/firmwares/atmegaxxu2/arduino-usbserial/Arduino-usbserial.c b/firmwares/atmegaxxu2/arduino-usbserial/Arduino-usbserial.c
new file mode 100755
index 0000000..4de73c8
--- /dev/null
+++ b/firmwares/atmegaxxu2/arduino-usbserial/Arduino-usbserial.c
@@ -0,0 +1,242 @@
+/*

+             LUFA Library

+     Copyright (C) Dean Camera, 2010.

+              

+  dean [at] fourwalledcubicle [dot] com

+      www.fourwalledcubicle.com

+*/

+

+/*

+  Copyright 2010  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 disclaim 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 Arduino-usbserial project. This file contains the main tasks of

+ *  the project and is responsible for the initial application hardware configuration.

+ */

+

+#include "Arduino-usbserial.h"

+

+/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */

+RingBuff_t USBtoUSART_Buffer;

+

+/** Circular buffer to hold data from the serial port before it is sent to the host. */

+RingBuff_t USARTtoUSB_Buffer;

+

+/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */

+volatile struct

+{

+	uint8_t TxLEDPulse; /**< Milliseconds remaining for data Tx LED pulse */

+	uint8_t RxLEDPulse; /**< Milliseconds remaining for data Rx LED pulse */

+	uint8_t PingPongLEDPulse; /**< Milliseconds remaining for enumeration Tx/Rx ping-pong LED pulse */

+} PulseMSRemaining;

+

+/** 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         = 0,

+

+				.DataINEndpointNumber           = CDC_TX_EPNUM,

+				.DataINEndpointSize             = CDC_TXRX_EPSIZE,

+				.DataINEndpointDoubleBank       = false,

+

+				.DataOUTEndpointNumber          = CDC_RX_EPNUM,

+				.DataOUTEndpointSize            = CDC_TXRX_EPSIZE,

+				.DataOUTEndpointDoubleBank      = false,

+

+				.NotificationEndpointNumber     = CDC_NOTIFICATION_EPNUM,

+				.NotificationEndpointSize       = CDC_NOTIFICATION_EPSIZE,

+				.NotificationEndpointDoubleBank = false,

+			},

+	};

+

+/** 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(&USBtoUSART_Buffer);

+	RingBuffer_InitBuffer(&USARTtoUSB_Buffer);

+

+	sei();

+

+	for (;;)

+	{

+		/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */

+		if (!(RingBuffer_IsFull(&USBtoUSART_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(&USBtoUSART_Buffer, ReceivedByte);

+		}

+		

+		/* Check if the UART receive buffer flush timer has expired or the buffer is nearly full */

+		RingBuff_Count_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);

+		if ((TIFR0 & (1 << TOV0)) || (BufferCount > BUFFER_NEARLY_FULL))

+		{

+			TIFR0 |= (1 << TOV0);

+

+			if (USARTtoUSB_Buffer.Count) {

+				LEDs_TurnOnLEDs(LEDMASK_TX);

+				PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;

+			}

+

+			/* Read bytes from the USART receive buffer into the USB IN endpoint */

+			while (BufferCount--)

+			  CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&USARTtoUSB_Buffer));

+			  

+			/* Turn off TX LED(s) once the TX pulse period has elapsed */

+			if (PulseMSRemaining.TxLEDPulse && !(--PulseMSRemaining.TxLEDPulse))

+			  LEDs_TurnOffLEDs(LEDMASK_TX);

+

+			/* Turn off RX LED(s) once the RX pulse period has elapsed */

+			if (PulseMSRemaining.RxLEDPulse && !(--PulseMSRemaining.RxLEDPulse))

+			  LEDs_TurnOffLEDs(LEDMASK_RX);

+		}

+		

+		/* Load the next byte from the USART transmit buffer into the USART */

+		if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer))) {

+		  Serial_TxByte(RingBuffer_Remove(&USBtoUSART_Buffer));

+		  	

+		  	LEDs_TurnOnLEDs(LEDMASK_RX);

+			PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;

+		}

+		

+		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);

+		USB_USBTask();

+	}

+}

+

+/** Configures the board hardware and chip peripherals for the demo's functionality. */

+void SetupHardware(void)

+{

+	/* Disable watchdog if enabled by bootloader/fuses */

+	MCUSR &= ~(1 << WDRF);

+	wdt_disable();

+

+	/* Hardware Initialization */

+	Serial_Init(9600, false);

+	LEDs_Init();

+	USB_Init();

+

+	/* Start the flush timer so that overflows occur rapidly to push received bytes to the USB interface */

+	TCCR0B = (1 << CS02);

+	

+	/* Pull target /RESET line high */

+	AVR_RESET_LINE_PORT |= AVR_RESET_LINE_MASK;

+	AVR_RESET_LINE_DDR  |= AVR_RESET_LINE_MASK;

+}

+

+/** 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 Unhandled Control Request event. */

+void EVENT_USB_Device_UnhandledControlRequest(void)

+{

+	CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);

+}

+

+/** 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)

+{

+	uint8_t ConfigMask = 0;

+

+	switch (CDCInterfaceInfo->State.LineEncoding.ParityType)

+	{

+		case CDC_PARITY_Odd:

+			ConfigMask = ((1 << UPM11) | (1 << UPM10));		

+			break;

+		case CDC_PARITY_Even:

+			ConfigMask = (1 << UPM11);		

+			break;

+	}

+

+	if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)

+	  ConfigMask |= (1 << USBS1);

+

+	switch (CDCInterfaceInfo->State.LineEncoding.DataBits)

+	{

+		case 6:

+			ConfigMask |= (1 << UCSZ10);

+			break;

+		case 7:

+			ConfigMask |= (1 << UCSZ11);

+			break;

+		case 8:

+			ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));

+			break;

+	}

+

+	/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */

+	UCSR1B = 0;

+	UCSR1A = 0;

+	UCSR1C = 0;

+

+	/* Special case 57600 baud for compatibility with the ATmega328 bootloader. */	

+	UBRR1  = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600)

+			 ? SERIAL_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS)

+			 : SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);	

+

+	UCSR1C = ConfigMask;

+	UCSR1A = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600) ? 0 : (1 << U2X1);

+	UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));

+}

+

+/** ISR to manage the reception of data from the serial port, placing received bytes into a circular buffer

+ *  for later transmission to the host.

+ */

+ISR(USART1_RX_vect, ISR_BLOCK)

+{

+	uint8_t ReceivedByte = UDR1;

+

+	if (USB_DeviceState == DEVICE_STATE_Configured)

+	  RingBuffer_Insert(&USARTtoUSB_Buffer, ReceivedByte);

+}

+

+/** Event handler for the CDC Class driver Host-to-Device Line Encoding Changed event.

+ *

+ *  \param[in] CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced

+ */

+void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)

+{

+	bool CurrentDTRState = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR);

+

+	if (CurrentDTRState)

+	  AVR_RESET_LINE_PORT &= ~AVR_RESET_LINE_MASK;

+	else

+	  AVR_RESET_LINE_PORT |= AVR_RESET_LINE_MASK;

+}