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Added a naive clock implementation based on main loop counting for the Apple2 as it doesn't have a hardware clock.

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oliverschmidt 2007-08-10 13:30:02 +00:00
parent 1c77f6f1d5
commit c42cbe3141
2 changed files with 85 additions and 1 deletions
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78
platform/apple2enh/clock.c Normal file
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@ -0,0 +1,78 @@
/*
* Copyright (c) 2007, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Oliver Schmidt <ol.sc@web.de>
*
* $Id: clock.c,v 1.1 2007/08/10 13:30:02 oliverschmidt Exp $
*/
#include <apple2.h>
#include "contiki.h"
/* The enhanced Apple//e doesn't have a hardware clock whatsoever. Therefore the
* cc65 C-library for this target doesn't include an implementation of clock().
*/
static unsigned char tick = 14;
static clock_time_t time;
#include <stdio.h>
/*-----------------------------------------------------------------------------------*/
void
clock_init(void)
{
if(get_ostype() >= APPLE_IIGS) {
if(*(signed char *)0xC036 < 0) {
/* 5 / 14 = 1.0MHz / 2.8MHz */
tick = 5;
}
}
}
/*-----------------------------------------------------------------------------------*/
void
clock_update(void)
{
static unsigned int count;
count += tick;
if(count > 2500) {
count = 0;
++time;
}
}
/*-----------------------------------------------------------------------------------*/
clock_time_t
clock_time(void)
{
return time;
}
/*-----------------------------------------------------------------------------------*/

8
platform/apple2enh/contiki-main.c
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@ -30,7 +30,7 @@
*
* Author: Oliver Schmidt <ol.sc@web.de>
*
* $Id: contiki-main.c,v 1.2 2007/05/29 22:02:37 oliverschmidt Exp $
* $Id: contiki-main.c,v 1.3 2007/08/10 13:30:02 oliverschmidt Exp $
*/
#include <stdio.h>
@ -40,6 +40,8 @@
PROCINIT(&etimer_process,
&tcpip_process);
void clock_update(void);
/*-----------------------------------------------------------------------------------*/
void
uip_log(char *message)
@ -79,10 +81,14 @@ main(void)
}
#endif
clock_init();
printf("Contiki initiated, now starting process scheduling\n");
while(1) {
clock_update();
if(process_run() < 2) {
etimer_request_poll();