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Added a Contiki clock_time() implementation based on the cc65 clock() implementation.

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oliverschmidt 2007-05-29 21:56:21 +00:00
parent 7ec1a4f7aa
commit b23f4fc89d
3 changed files with 60 additions and 2 deletions
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3
cpu/6502/6502-conf.h
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@ -13,6 +13,9 @@ typedef unsigned short uip_stats_t;
#define CCIF
#define CLIF
#define CLOCK_CONF_SECOND 2
typedef unsigned short clock_time_t;
#define UIP_ARCH_ADD32 1
#define UIP_ARCH_CHKSUM 1

4
cpu/6502/Makefile.6502
View file

@ -30,7 +30,7 @@
#
# Author: Oliver Schmidt <ol.sc@web.de>
#
# $Id: Makefile.6502,v 1.9 2007/05/19 07:55:35 oliverschmidt Exp $
# $Id: Makefile.6502,v 1.10 2007/05/29 21:56:21 oliverschmidt Exp $
#
ifndef CONTIKI
@ -54,7 +54,7 @@ CONTIKI_CPU_DIRS = . net sys
CONTIKI_TARGET_MAIN = ${addprefix $(OBJECTDIR)/,contiki-main.o}
CONTIKI_TARGET_SOURCEFILES = contiki-main.c
CONTIKI_CPU_SOURCEFILES = mtarch.c mtarch-asm.S lc-asm.S uip_arch.c
CONTIKI_CPU_SOURCEFILES = clock.c mtarch.c mtarch-asm.S lc-asm.S uip_arch.c
CONTIKI_SOURCEFILES += $(CONTIKI_CPU_SOURCEFILES) $(CONTIKI_TARGET_SOURCEFILES)

55
cpu/6502/clock.c Normal file
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@ -0,0 +1,55 @@
/*
* 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 2007/05/29 21:56:22 oliverschmidt Exp $
*/
#include <time.h>
#include "contiki.h"
clock_time_t
clock_time(void)
{
/* Contiki contains quite some calculations based on clock_time_t so we want
* to avoid defining clock_time_t to be 32 bit because that would mean a lot
* of overhead for cc65 targets.
* On the other hand we want to avoid wrapping around frequently so the idea
* is to reduce the clock resolution to the bare minimum. This is defined by
* the TCP/IP stack using a 1/2 second periodic timer. So CLOCK_CONF_SECOND
* needs to be defined at least as 2.
* The value 2 works out especially nicely as it allows us to implement the
* clock frequency devider below purely in (32 bit) integer arithmetic based
* on the educated guess of CLK_TCK being an even value.
*/
return clock() / (CLK_TCK / CLOCK_CONF_SECOND);
}