VirtualSerial.c

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/*
 * @brief Make your board becomes a USB Virtual Com
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * Copyright(C) Dean Camera, 2011, 2012
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */

#include "VirtualSerial.h"

/*****************************************************************************
 * Private types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Public types/enumerations/variables
 ****************************************************************************/

#define ECHO_CHARACTER_TASK     (0)
#define CDC_BRIDGE_TASK         (ECHO_CHARACTER_TASK + 1)

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,
  .PortNumber             = 0,
 },
};

// static FILE USBSerialStream;

#define CDC_TASK_SELECT ECHO_CHARACTER_TASK

/*****************************************************************************
 * Private functions
 ****************************************************************************/

static void SetupHardware(void)
{
 Board_Init();
 USB_Init(VirtualSerial_CDC_Interface.Config.PortNumber, USB_MODE_Device);

#if defined(USB_DEVICE_ROM_DRIVER)
 UsbdCdc_Init();
#endif
}

#if (CDC_TASK_SELECT == ECHO_CHARACTER_TASK)

static void EchoCharacter(void)
{
 /* Echo back character */
 uint8_t recv_byte[CDC_TXRX_EPSIZE];
#if !defined(USB_DEVICE_ROM_DRIVER)
 if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface)) {
  recv_byte[0] = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  CDC_Device_SendData(&VirtualSerial_CDC_Interface, (char *) recv_byte, 1);
 }
#else
 uint32_t recv_count;
 recv_count = UsbdCdc_RecvData(recv_byte, CDC_TXRX_EPSIZE);
 if (recv_count) {
  UsbdCdc_SendData(recv_byte, recv_count);
 }
#endif

}

#else

static void CDC_Bridge_Task(void)
{
 /* Echo back character */
 uint8_t out_buff[CDC_TXRX_EPSIZE], in_buff[CDC_TXRX_EPSIZE];
 uint32_t recv_count;
#if !defined(USB_DEVICE_ROM_DRIVER)
 recv_count = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
 while (recv_count--) {
  out_buff[0] = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  Serial_Send((uint8_t *) out_buff, 1, BLOCKING);
 }

 recv_count = Serial_Revc(in_buff, CDC_TXRX_EPSIZE, NONE_BLOCKING);
 if (recv_count) {
  CDC_Device_SendData(&VirtualSerial_CDC_Interface, (char *) in_buff, recv_count);
 }
#else
 recv_count = UsbdCdc_RecvData(out_buff, CDC_TXRX_EPSIZE);
 if (recv_count) {
  Serial_Send((uint8_t *) out_buff, recv_count, BLOCKING);
 }

 recv_count = Serial_Revc(in_buff, CDC_TXRX_EPSIZE, NONE_BLOCKING);
 if (recv_count) {
  UsbdCdc_SendData(in_buff, recv_count);
 }
#endif
}

#endif

/*****************************************************************************
 * Public functions
 ****************************************************************************/

int main(void)
{
 SetupHardware();

 for (;; ) {
#if defined(USB_DEVICE_ROM_DRIVER)
  UsbdCdc_IO_Buffer_Sync_Task();
#endif

#if (CDC_TASK_SELECT == ECHO_CHARACTER_TASK)
  EchoCharacter();
#else
  CDC_Bridge_Task();
#endif
#if !defined(USB_DEVICE_ROM_DRIVER)
  // CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
  USB_USBTask(VirtualSerial_CDC_Interface.Config.PortNumber, USB_MODE_Device);
#endif
 }
}

void EVENT_USB_Device_Connect(void)
{}

void EVENT_USB_Device_Disconnect(void)
{}

void EVENT_USB_Device_ConfigurationChanged(void)
{
 bool ConfigSuccess = true;

 ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);

 // LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
}

void EVENT_USB_Device_ControlRequest(void)
{
 CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
}

#if !defined(USB_DEVICE_ROM_DRIVER)
void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
{
 /*TODO: add LineEncoding processing here
  * this is just a simple statement, only Baud rate is set */
 // Serial_Init(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS, false);
}

#else
void EVENT_UsbdCdc_SetLineCode(CDC_LINE_CODING *line_coding)
{
 // Serial_Init(VirtualSerial_CDC_Interface.State.LineEncoding.BaudRateBPS, false);
}

#endif