w89k-io.c

俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）的全部源代码。

/* w89k-io.c -- I/O code for the Winbond Cougar board.
 *
 * Copyright (c) 1995 Cygnus Support
 *
 * The authors hereby grant permission to use, copy, modify, distribute,
 * and license this software and its documentation for any purpose, provided
 * that existing copyright notices are retained in all copies and that this
 * notice is included verbatim in any distributions. No written agreement,
 * license, or royalty fee is required for any of the authorized uses.
 * Modifications to this software may be copyrighted by their authors
 * and need not follow the licensing terms described here, provided that
 * the new terms are clearly indicated on the first page of each file where
 * they apply.
 */
#include "w89k.h"

void zylons();
void led_putnum();
void delay();

/*
 * outbyte -- shove a byte out the serial port. We wait till the byte 
 */
void
outbyte (byte)
     unsigned char byte;
{
  while ((inp(COM1_LSR) & TRANSMIT) == 0x0) ;

  outp (COM1_DATA, byte);

  return;
}

/*
 * inbyte -- get a byte from the serial port
 */
unsigned char
inbyte ()
{
  while ((inp(COM1_LSR) & RECEIVE) == 0x0) ;

  return (inp(COM1_DATA));
}

/*
 * led_putnum -- print a hex number on the LED. the value of num must be a byte. 
 *		 The max number 15, since the front panel only has 4 LEDs.
 */
void
led_putnum ( num )
char num;
{
  print ("Sorry, no LED's on the WinBond W89k board, using putnum instead\r\n");
  putnum (num);
}

/*
 * zylons -- draw a rotating pattern. NOTE: this function never returns.
 */
void
zylons()
{
  print ("Sorry, no LED's on the WinBond W89k board\r\n");
}

void
delay (x)
     int x;
{
  int  y = 17;
  while (x-- !=0)
    y = y^2;
}