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diff --git a/lib/lufa/Projects/Benito/Benito.c b/lib/lufa/Projects/Benito/Benito.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 Benito project. This file contains the main tasks of
+ * the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "Benito.h"
+
+/** Circular buffer to hold data from the serial port before it is sent to the host. */
+static RingBuffer_t USARTtoUSB_Buffer;
+
+/** Underlying data buffer for \ref USARTtoUSB_Buffer, where the stored bytes are located. */
+static uint8_t USARTtoUSB_Buffer_Data[128];
+
+/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */
+volatile struct
+{
+ uint8_t ResetPulse; /**< Milliseconds remaining for target /RESET pulse */
+ 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;
+
+/** Milliseconds remaining until the receive buffer is flushed to the USB host */
+uint8_t FlushPeriodRemaining = RECEIVE_BUFFER_FLUSH_MS;
+
+/** 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(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data));
+
+ GlobalInterruptEnable();
+
+ for (;;)
+ {
+ /* Echo bytes from the host to the target via the hardware USART */
+ if ((UCSR1A & (1 << UDRE1)) && CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
+ {
+ UDR1 = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+
+ LEDs_TurnOnLEDs(LEDMASK_TX);
+ PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;
+ }
+
+ /* Check if the millisecond timer has elapsed */
+ if (TIFR0 & (1 << OCF0A))
+ {
+ /* Clear flush timer expiry flag */
+ TIFR0 |= (1 << TOV0);
+
+ /* Check if the reset pulse period has elapsed, if so tristate the target reset line */
+ if (PulseMSRemaining.ResetPulse && !(--PulseMSRemaining.ResetPulse))
+ {
+ LEDs_TurnOffLEDs(LEDMASK_BUSY);
+ AVR_RESET_LINE_DDR &= ~AVR_RESET_LINE_MASK;
+ }
+
+ /* Check if the LEDs should be ping-ponging (during enumeration) */
+ if (PulseMSRemaining.PingPongLEDPulse && !(--PulseMSRemaining.PingPongLEDPulse))
+ {
+ LEDs_ToggleLEDs(LEDMASK_TX | LEDMASK_RX);
+ PulseMSRemaining.PingPongLEDPulse = PING_PONG_LED_PULSE_MS;
+ }
+
+ /* 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);
+
+ /* Check if the receive buffer flush period has expired */
+ uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
+ if (!(--FlushPeriodRemaining) || (BufferCount > 200))
+ {
+ FlushPeriodRemaining = RECEIVE_BUFFER_FLUSH_MS;
+
+ /* Start RX LED indicator pulse */
+ if (BufferCount)
+ {
+ LEDs_TurnOnLEDs(LEDMASK_RX);
+ PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;
+ }
+
+ /* Echo bytes from the target to the host via the virtual serial port */
+ 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(&USARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
+ {
+ break;
+ }
+
+ /* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
+ RingBuffer_Remove(&USARTtoUSB_Buffer);
+ }
+ }
+ }
+
+ CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+ 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);
+#endif
+
+ /* Hardware Initialization */
+ LEDs_Init();
+ USB_Init();
+
+ /* Millisecond Timer Interrupt */
+ OCR0A = (F_CPU / 64 / 1000);
+ TCCR0A = (1 << WGM01);
+ TCCR0B = ((1 << CS01) | (1 << CS00));
+
+ /* Tristate target /RESET Line */
+ AVR_RESET_LINE_PORT &= ~AVR_RESET_LINE_MASK;
+ AVR_RESET_LINE_DDR &= ~AVR_RESET_LINE_MASK;
+}
+
+/** Event handler for the library USB Connection event. */
+void EVENT_USB_Device_Connect(void)
+{
+ PulseMSRemaining.PingPongLEDPulse = PING_PONG_LED_PULSE_MS;
+ LEDs_SetAllLEDs(LEDMASK_TX);
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Device_Disconnect(void)
+{
+ PulseMSRemaining.PingPongLEDPulse = 0;
+ LEDs_SetAllLEDs(LEDS_NO_LEDS);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+ bool ConfigSuccess = true;
+
+ ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+
+ PulseMSRemaining.PingPongLEDPulse = 0;
+
+ LEDs_SetAllLEDs(ConfigSuccess ? LEDS_NO_LEDS : LEDMASK_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)
+{
+ 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;
+
+ /* Set the new baud rate before configuring the USART */
+ UBRR1 = SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
+
+ /* Reconfigure the USART in double speed mode for a wider baud rate range at the expense of accuracy */
+ UCSR1C = ConfigMask;
+ UCSR1A = (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)
+{
+ static bool PreviousDTRState = false;
+ bool CurrentDTRState = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR);
+
+ /* Check if the DTR line has been asserted - if so, start the target AVR's reset pulse */
+ if (!(PreviousDTRState) && CurrentDTRState)
+ {
+ LEDs_SetAllLEDs(LEDMASK_BUSY);
+
+ AVR_RESET_LINE_DDR |= AVR_RESET_LINE_MASK;
+ PulseMSRemaining.ResetPulse = AVR_RESET_PULSE_MS;
+ }
+
+ PreviousDTRState = CurrentDTRState;
+}
+