usb_vuart_lib.h

C89c51 usb驱动程序,实现了usb转串口的功能,提供了一个虚拟的串口

/*H**************************************************************************
* NAME: usb_vuart_lib.h
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* REVISION:       1.2
*----------------------------------------------------------------------------
* PURPOSE:
* File contains definitions for the Atmel USB "virtual UART" library module.
*
* #include this file in "usb_vuart_lib.c"
*
*****************************************************************************/

#ifndef _USB_VUART_LIB_H_
#define _USB_VUART_LIB_H_

/*_____ I N C L U D E S ____________________________________________________*/

#include  "usb_defs.h"
#include  "usb_config.h"
#include  "c5131_drv.h"


/*_____ M A C R O S ________________________________________________________*/
#ifdef UART_USB_DEFAULT_INPUT
#define usb_vuart_getchar            _getkey
#define usb_vuart_rx_data_avail      test_hit
#endif

#ifdef UART_USB_DEFAULT_OUTPUT
#define usb_vuart_putchar            putchar
#endif

/*_____ D E F I N I T I O N ________________________________________________*/


/*_____ D E C L A R A T I O N ______________________________________________*/

void  usb_vuart_init(void);
bit   usb_vuart_rx_data_avail(void);
char  usb_vuart_getchar(void);
bit   usb_vuart_tx_ready(void);
char  usb_vuart_putchar(Uchar);
void  usb_vuart_flush(void);

#endif /* _USB_VUART_LIB_H_ */