自学教程：C++ CDC_Device_ReceiveByte函数代码示例

void HandleSerial(void){	// 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);			CDC_Device_SendByte(&VirtualSerial_CDC_Interface, ReceivedByte);		}	}	while (RingBuffer_GetCount(&FromHost_Buffer) > 0)	{		int16_t c = RingBuffer_Remove(&FromHost_Buffer);		if(c == '/n' || c == '/r'){			if(cmd_cnt > 0 && (cmd[cmd_cnt-1] == '/n' || cmd[cmd_cnt-1] == '/r'))				cmd_cnt--;			cmd[cmd_cnt] = 0;						execute_command();			cmd_cnt = 0;					}		else{			cmd[cmd_cnt++] = c;					}	}}

int16_t VncServerGetData(uint8_t * buffer, uint16_t maxsize){    uint16_t size = 0;    if(usbConnectionReset)    {        usbConnectionReset = false;        return -1;    }    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);    USB_USBTask();    while(debugcounter > 64)    {        DDRF |= (1 << 0);        PORTF |= (1 << 0);        debugcounter -= 64;        PORTF &= ~(1 << 0);    }    while ( size < maxsize )    {        int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);        if(ReceivedByte < 0)            break;        buffer[size++] = (uint8_t)ReceivedByte;        debugcounter++;    }    return size;}

int main(void){  SetupHardware();  /* Create a regular character stream for the interface so that it can be used with the stdio.h functions */  CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);  GlobalInterruptEnable();  while(1)  {    DebounceUpdate();    EncoderUpdate();    LedUpdate();    SendSerial();    /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */    CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);    HID_Device_USBTask(&Mouse_HID_Interface);    HID_Device_USBTask(&Keyboard_HID_Interface);    USB_USBTask();  }}

/** 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, USBtoUSART_Buffer_Data, sizeof(USBtoUSART_Buffer_Data));	RingBuffer_InitBuffer(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data));	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);	GlobalInterruptEnable();	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 */		uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);		if (BufferCount)		{			Endpoint_SelectEndpoint(VirtualSerial_CDC_Interface.Config.DataINEndpoint.Address);			/* Check if a packet is already enqueued to the host - if so, we shouldn't try to send more data			 * until it completes as there is a chance nothing is listening and a lengthy timeout could occur */			if (Endpoint_IsINReady())			{				/* Never send more than one bank size less one byte to the host at a time, so that we don't block				 * while a Zero Length Packet (ZLP) to terminate the transfer is sent if the host isn't listening */				uint8_t BytesToSend = MIN(BufferCount, (CDC_TXRX_EPSIZE - 1));				/* Read bytes from the USART receive buffer into the USB IN endpoint */				while (BytesToSend--)				{					/* 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);				}			}		}		/* Load the next byte from the USART transmit buffer into the USART */		if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer)))		  Serial_SendByte(RingBuffer_Remove(&USBtoUSART_Buffer));		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);		USB_USBTask();	}}

/** 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();	/* Create a regular character stream for the interface so that it can be used with the stdio.h functions */	CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);	GlobalInterruptEnable();	_setBrightness(50);	for (;;)	{		/* Must throw away unused bytes from the host, or it will lock up while waiting for the device */		CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);		USB_USBTask();		DS1302_clock_burst_read((uint8_t *) &rtc);		_setDigit( rtc.Seconds % 10 );		_setBrightness( 50 );		_delay_ms(4);    }}

void usb_serial_flush_input(void){  int16_t i;  int16_t bufsize = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);  for(i=0; i<bufsize; i++)    CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);}

/** 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, USBtoUSART_Buffer_Data, sizeof(USBtoUSART_Buffer_Data));    RingBuffer_InitBuffer(&ToUSB_Buffer, ToUSB_Buffer_Data, sizeof(ToUSB_Buffer_Data));	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);	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);		}				/* Load the next byte from the USART transmit buffer into the USART */		if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer)))		  Serial_SendByte(RingBuffer_Remove(&USBtoUSART_Buffer));		cdc_send_USB_data(&VirtualSerial_CDC_Interface);		USB_USBTask();	}}

static int CDC_Device_getchar(FILE* Stream){	if (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))	  return _FDEV_EOF;	return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));}

uint8_t getch() {	int ReceivedByte = -1;	// wait until CDC sends a byte	while (ReceivedByte < 0)		ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);	return ReceivedByte;}

intmain(void) {  uint8_t i = 1;  uint8_t count = 3;  setup();  blink(3);  _delay_ms(100);  while (1) {    // Print greeting at most count times.    if (i <= count) {      if (USB_DeviceState == DEVICE_STATE_Configured && ok_to_send) {        blink(i);        CDC_Device_SendString(&VirtualSerial_CDC_Interface, "Hello World! ");        CDC_Device_SendByte(&VirtualSerial_CDC_Interface, '0' + i);        CDC_Device_SendString(&VirtualSerial_CDC_Interface, "/r/n");        CDC_Device_Flush(&VirtualSerial_CDC_Interface);        i++;      }    }    if (USB_DeviceState == DEVICE_STATE_Configured) {      /* Must throw away unused bytes from the host, or it will lock up         while waiting for the device */      CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);    }    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);    USB_USBTask();  }}

int main(void) {  SetupHardware();  // If digital pin 6 (PD7) is low, fill channel data with a distinctive  // pattern.  DDRD &= 0b01111111;  bool fill_with_pattern = bit_is_clear(PIND, 7);  if (fill_with_pattern) {    memset(_chandata, 0b01010101, 2048);  }  LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);  GlobalInterruptEnable();  while (true) {    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);    USB_USBTask();    if (connected) {      uint8_t* position = _chandata;      int16_t universe = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);      if (universe == -1) {        // just a normal timeout, continue        continue;      }      position += universe;      while (position < _chandata + 2048) {        int16_t channel_level =            CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);        if (channel_level != -1) {          *position = (uint8_t)channel_level;          position += 4;        } else {          if (!connected) {            // connection lost, forget our position and wait for a connection            break;          }          // just a normal timeout, continue          continue;        }      }    }  }}

void VCOM_echo(void){	if(CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))	{		in_buff[0] = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);		CDC_Device_SendData(&VirtualSerial_CDC_Interface, (char *)in_buff, 1);		Endpoint_ClearIN();	}}

uint8_t gethexdigit(void){	// read directly from serial port	const uint8_t c = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);	if('0' <= c && c <= '9') return c-'0';	if ('A' <= c && c && c <= 'F') return 10+c-'A';	if ('a' <= c && c && c <= 'f') return 10+c-'a';	return -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();	GlobalInterruptEnable();	uint8_t sending = 0;	for (;;) {		while (1) {                	int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);			if (ReceivedByte < 0) 				break;			if (!configured) continue;			if (!sending) {				PORTC.OUTSET = PIN1_bm;				sending = 1;			}			PORTD.OUTTGL = PIN5_bm;                	while(!USART_IsTXDataRegisterEmpty(&USART));                	USART_PutChar(&USART, ReceivedByte & 0xff);		}		if (sending) {			USART_ClearTXComplete(&USART);               		while(!USART_IsTXComplete(&USART));			PORTC.OUTCLR = PIN1_bm;			sending = 0;			}                Endpoint_SelectEndpoint(VirtualSerial_CDC_Interface.Config.DataINEndpoint.Address);                /* Check if a packet is already enqueued to the host - if so, we shouldn't try to send more data                 * until it completes as there is a chance nothing is listening and a lengthy timeout could occur */		if (configured && Endpoint_IsINReady()) {			uint8_t maxbytes = CDC_TXRX_EPSIZE;                	while (USART_RXBufferData_Available(&USART_data) && maxbytes-->0) {                        	uint8_t b = USART_RXBuffer_GetByte(&USART_data);				CDC_Device_SendByte(&VirtualSerial_CDC_Interface, b);				PORTD.OUTTGL = PIN5_bm;                	}                }		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);		USB_USBTask();		if (loop++) continue;		if (!configured) continue;		PORTD.OUTTGL = PIN5_bm;	}}

/** 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();	}}

//------------------------------------------------------------------------------void appUsbDataReceived(Application *app){    int16_t received_byte = 0;    while((received_byte = CDC_Device_ReceiveByte(app->cdc_info)) >= 0)    {        RingBuffer_Insert(&app->buffer_, received_byte);    }    serialProcess(app);}

int main(void){	SetupHardware();	RingBuffer_InitBuffer(&USBtoUSART_Buffer, USBtoUSART_Buffer_Data, sizeof(USBtoUSART_Buffer_Data));	RingBuffer_InitBuffer(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data));	LEDs_SetAllLEDs(0);	sei();	for (;;)	{		if ((PINF & 0x01) == 0x01)			LEDs_SetAllLEDs(2);		else			LEDs_SetAllLEDs(0);		/* Only try to read in bytes from the CDC interface if the (outbound) 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 */		uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);		if ((TIFR0 & (1 << TOV0)) || (BufferCount > (uint8_t)(sizeof(USARTtoUSB_Buffer_Data) * .75)))		{			/* 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(&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);			}		}		/* Load the next byte from the USART transmit buffer into the USART */		if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer)))		  Serial_SendByte(RingBuffer_Remove(&USBtoUSART_Buffer));		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);		USB_USBTask();	}}

static int CDC_Device_getchar(FILE* Stream){	int16_t ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));	if (ReceivedByte < 0)	  return _FDEV_EOF;	return ReceivedByte;}

/** 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();	}}

void CDC_In_Task(){ /* Read bytes from the USB OUT endpoint and transmit to jennic if programming mode */ if ( ringbuf_elements(&USBtoUSART_Buffer) < ringbuf_size(&USBtoUSART_Buffer)-2 ) {   // TODO check int16_t type   int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC1_Interface);   if ( !(ReceivedByte < 0) )     ringbuf_put(&USBtoUSART_Buffer, ReceivedByte); }}

/******************************************************************************* Nombre de la funcion	: int16_t serial_read(void)*    int16_t            : Si se leyo un byte exitosamente, retorna el byte, si*                         no, retorna -1* Creada por		: Alejandro Weinstein* Fecha Creacion	: 2013-04-08** Descripcion : Lee un byte desde el puerto serial virtual******************************************************************************/int16_t serial_read(void){  int16_t ReceivedByte;  ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);	    /* Read bytes from the USB OUT endpoint */  if (!(ReceivedByte < 0)) {    return ReceivedByte;  } else {    return -1;  }}

static int CDC_Device_getchar_Blocking(FILE* Stream){	while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))	{		if (USB_DeviceState == DEVICE_STATE_Unattached)		  return _FDEV_EOF;			CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));		USB_USBTask();	}	return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));}

/** 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();	/* Create a regular character stream for the interface so that it can be used with the stdio.h functions */	CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);	sei();    DDRB  |= (1 << 4);    PORTB |= (1 << 4);	for (;;)	{        int16_t c = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);        if (c > 0){            switch (c) {                case '1':                    // this will eventually be to strobe the modem on pin of a telit module                    // set port to output mode and low state                    // stall for 1000 ms                    // set port back to high impedance                    CDC_Device_SendString(&VirtualSerial_CDC_Interface, "received 1/r/n");                    DDRD  |=  (1 << 0);                    PORTD &= ~(1 << 0);                    _delay_ms(1000);                    DDRD  &= ~(1 << 0);                    PORTD |=  (1 << 0);                    break;                case 'r':                    // this will be to strobe the reset pin of a telit module                    CDC_Device_SendString(&VirtualSerial_CDC_Interface, "received r/r/n");                    PORTB &= ~(1 << 4);                    _delay_ms(200);                    PORTB |= (1 << 4);                    break;                case '?':                    // this wil be to inquire abouth the powermon pin of a telit module                    CDC_Device_SendString(&VirtualSerial_CDC_Interface, "received ?/r/n");                    PORTB |= ~(1 << 4);                    break;                default:                    CDC_Device_SendString(&VirtualSerial_CDC_Interface, "unrecognized input/r/n");            }        }		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);		USB_USBTask();	}}

/** 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);	for (;;)	{		CheckJoystickMovement();		/* Discard all received data on the first CDC interface */		while (CDC_Device_BytesReceived(&VirtualSerial1_CDC_Interface))		  CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);		/* Echo all received data on the second CDC interface */		while (CDC_Device_BytesReceived(&VirtualSerial2_CDC_Interface))		  CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface));		  		CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);		CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);		USB_USBTask();	}}

void CDC_Arduino_In_Task(){uint16_t bytes = CDC_Device_BytesReceived(&VirtualSerial_CDC0_Interface);	while(bytes--){	/* Read bytes from the USB OUT endpoint and store it for the Arduino Serial Class */ 		if ( ringbuf_elements(&serialRx_Buffer) < ringbuf_size(&serialRx_Buffer)-2 ) {   			int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC0_Interface);   			if ( !(ReceivedByte < 0) )     				ringbuf_put(&serialRx_Buffer, ReceivedByte); 		} 		else{ 			return; 		} 	} // end while}

/** 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 (;;)	{		CheckJoystickMovement();		/* Discard all received data on the first CDC interface */		CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);		/* Echo all received data on the second CDC interface */		int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface);		if (!(ReceivedByte < 0))		  CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, (uint8_t)ReceivedByte);		CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);		CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);		USB_USBTask();	}}

static int CDC_Device_getchar_Blocking(FILE* Stream){	int16_t ReceivedByte;	while ((ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))) < 0)	{		if (USB_DeviceState[corenum] == DEVICE_STATE_Unattached)		  return _FDEV_EOF;		CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));		USB_USBTask();	}	return ReceivedByte;}

void VCOM_bridge(void){	uint32_t recv_count;	recv_count = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);	while(recv_count--)	{		out_buff[0] = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);		uart_send_byte(out_buff[0]);	}	recv_count = uart_get_data(in_buff);	if(recv_count)	{		CDC_Device_SendData(&VirtualSerial_CDC_Interface, (char *)in_buff, recv_count);		Endpoint_ClearIN();	}}

uint8_t TerminalReceiveChar(unsigned int timeout){    // Try to read a character from the USB library    unsigned int start = GetMilliSeconds();    while (GetMilliSeconds() - start < timeout)    {        int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);        if (!(ReceivedByte < 0))        {            // got a character            return((unsigned char)ReceivedByte);        }    }    return 0;}