vcomdemo.c

来自「Hello I Send som Source Code Aboat LPC20」· C语言 代码 · 共 117 行

/*----------------------------------------------------------------------------
 *      Name:    vcomdemo.c
 *      Purpose: USB virtual COM port Demo
 *      Version: V1.02
 *----------------------------------------------------------------------------
 *      This file is part of the uVision/ARM development tools.
 *      This software may only be used under the terms of a valid, current,
 *      end user licence from KEIL for a compatible version of KEIL software
 *      development tools. Nothing else gives you the right to use it.
 *
 *      Copyright (c) 2005-2008 Keil Software.
 *---------------------------------------------------------------------------*/

#include <LPC23xx.H>                                  /* LPC23xx definitions */
#include "type.h"

#include "usb.h"
#include "usbcfg.h"
#include "usbhw.h"
#include "usbcore.h"
#include "cdc.h"
#include "cdcuser.h"
#include "serial.h"
#include "lcd.h"
#include "vcomdemo.h"


/*----------------------------------------------------------------------------
 Initialises the VCOM port.
 Call this function before using VCOM_putchar or VCOM_getchar
 *---------------------------------------------------------------------------*/
void VCOM_Init(void) {

  CDC_Init ();
}


/*----------------------------------------------------------------------------
  Reads character from serial port buffer and writes to USB buffer
 *---------------------------------------------------------------------------*/
void VCOM_Serial2Usb(void) {
  static char serBuf [USB_CDC_BUFSIZE];
         int  numBytesRead, numAvailByte;
	
  ser_AvailChar (&numAvailByte);
  if (numAvailByte > 0) {
    if (CDC_DepInEmpty) {
      numBytesRead = ser_Read (&serBuf[0], &numAvailByte);

      CDC_DepInEmpty = 0;
	  USB_WriteEP (CDC_DEP_IN, (unsigned char *)&serBuf[0], numBytesRead);
    }
  }

}

/*----------------------------------------------------------------------------
  Reads character from USB buffer and writes to serial port buffer
 *---------------------------------------------------------------------------*/
void VCOM_Usb2Serial(void) {
  static char serBuf [32];
         int  numBytesToRead, numBytesRead, numAvailByte;

  CDC_OutBufAvailChar (&numAvailByte);
  if (numAvailByte > 0) {
      numBytesToRead = numAvailByte > 32 ? 32 : numAvailByte; 
      numBytesRead = CDC_RdOutBuf (&serBuf[0], &numBytesToRead);
      ser_Write (&serBuf[0], &numBytesRead);    
  }

}


/*----------------------------------------------------------------------------
  checks the serial state and initiates notification
 *---------------------------------------------------------------------------*/
void VCOM_CheckSerialState (void) {
         unsigned short temp;
  static unsigned short serialState;

  temp = CDC_GetSerialState();
  if (serialState != temp) {
     serialState = temp;
     CDC_NotificationIn();                  // send SERIAL_STATE notification
  }
}


/*----------------------------------------------------------------------------
  Main Program
 *---------------------------------------------------------------------------*/
int main (void) {

  PINSEL10 = 0;                             // Disable ETM interface
  FIO2DIR  = LEDMSK;                        // LED's defined as Outputs

  LCD_init();                               // Initialize LCD display module
  LCD_cur_off();
  LCD_cls();
  LCD_puts("MCB2300 USB VCOM");
  LCD_puts("  www.keil.com  ");

  VCOM_Init();                              // VCOM Initialization

  USB_Init();                               // USB Initialization
  USB_Connect(TRUE);                        // USB Connect

  while (!USB_Configuration) ;              // wait until USB is configured

  while (1) {                               // Loop forever
    VCOM_Serial2Usb();                      // read serial port and initiate USB event
    VCOM_CheckSerialState();
	VCOM_Usb2Serial();
  } // end while											   
} // end main ()