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|
/*-------------------------------------------------------------------------+
| inch.c v1.1 - PC386 BSP - 1997/08/07
+--------------------------------------------------------------------------+
| (C) Copyright 1997 -
| - NavIST Group - Real-Time Distributed Systems and Industrial Automation
|
| http://pandora.ist.utl.pt
|
| Instituto Superior Tecnico * Lisboa * PORTUGAL
+--------------------------------------------------------------------------+
| Disclaimer:
|
| This file is provided "AS IS" without warranty of any kind, either
| expressed or implied.
+--------------------------------------------------------------------------+
| This code is based on:
| inch.c,v 1.3 1995/12/19 20:07:25 joel Exp - go32 BSP
| With the following copyright notice:
| With the following copyright notice:
| **************************************************************************
| * COPYRIGHT (c) 1989-1998.
| * On-Line Applications Research Corporation (OAR).
| * Copyright assigned to U.S. Government, 1994.
| *
| * The license and distribution terms for this file may be
| * found in found in the file LICENSE in this distribution or at
| * http://www.OARcorp.com/rtems/license.html.
| **************************************************************************
|
| $Id$
+--------------------------------------------------------------------------*/
#include <bsp.h>
#include <irq.h>
/*-------------------------------------------------------------------------+
| Constants
+--------------------------------------------------------------------------*/
#define KBD_BUF_SIZE 256
static unsigned short kbd_buffer[KBD_BUF_SIZE];
static rtems_unsigned16 kbd_first = 0;
static rtems_unsigned16 kbd_last = 0;
static rtems_unsigned16 kbd_end = KBD_BUF_SIZE - 1;
/*-------------------------------------------------------------------------+
| Function: rtemsReboot
| Description: Reboot the PC.
| Global Variables: None.
| Arguments: None.
| Returns: Nothing.
+--------------------------------------------------------------------------*/
void rtemsReboot(void)
{
/* shutdown and reboot */
outport_byte(0x64, 0xFE); /* use keyboard controler to do the job... */
} /* rtemsReboot */
#define disable __asm__ __volatile__("cli")
#define enable __asm__ __volatile__("sti");
/*
* Check if a key has been pressed. This is a non-destructive
* call, meaning, it keeps the key in the buffer.
*/
int rtems_kbpoll( void )
{
int rc;
disable;
rc = ( kbd_first != kbd_last ) ? TRUE : FALSE;
enable;
return rc;
}
int getch( void )
{
int c;
while( kbd_first == kbd_last )
{
rtems_task_wake_after( 10 );
}
c = kbd_buffer[ kbd_first ];
kbd_first = (kbd_first + 1) % KBD_BUF_SIZE;
return c;
}
void add_to_queue( unsigned short b )
{
unsigned int next;
kbd_buffer[ kbd_last ] = b;
next = (kbd_last == kbd_end) ? 0 : kbd_last + 1;
if( next != kbd_first )
{
kbd_last = next;
}
}
|
