Subversion Repositories openrisc_2011-10-31

/* 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;

}