port_clock.c

在AVR单片机上使用的一款RTOS

/*
 *  iRTOS
 *  Copyright (C) 2008  Dmitriy Cherepanov
 *
 *  This file is part of iRTOS
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public either
 *  version 2.1 of the License, or (at your option) any later version.
 *  This source is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Do not be lasy! For the latest version see http://irtos.sourceforge.net .
 */

#include "iRTOS.h"
#include "kernel/clock.h"
#include "kernel/thread.h"
#include "port_clock.h"
#include "port_os.h"
#include <avr/io.h>

/** 
\addtogroup xgportAVR
At mega 128 Clock prescalers
CSn2 CSn1 CSn0 Description
0	0	0	No clock source. (Timer/Counter stopped)
0	0	1	clkI/O/1 (No prescaling
0	1	0	clkI/O/8 (From prescaler)
0	1	1	clkI/O/64 (From prescaler)
1	0	0	clkI/O/256 (From prescaler)
1	0	1	clkI/O/1024 (From prescaler)
1	1	0 	External clock source on Tn pin. Clock on falling edge
1	1	1 	External clock source on Tn pin. Clock on rising edge
*/

#if (iZERO_CLOCK_DIV == portZERO_CLOCK_DIV0)
#warning Timer Clock Sourse Undefined
#define portZERO_CLOCK_CSN	0
#endif
#if (iZERO_CLOCK_DIV == portZERO_CLOCK_DIV0)
#define portZERO_CLOCK_CSN	1
#endif
#if (iZERO_CLOCK_DIV == portZERO_CLOCK_DIV8)
#define portZERO_CLOCK_CSN	2
#endif
#if (iZERO_CLOCK_DIV == portZERO_CLOCK_DIV64)
#define portZERO_CLOCK_CSN	3
#endif
#if (iZERO_CLOCK_DIV == portZERO_CLOCK_DIV256)
#define portZERO_CLOCK_CSN	4
#endif
#if (iZERO_CLOCK_DIV == portZERO_CLOCK_DIV1024)
#define portZERO_CLOCK_CSN	5
#endif
#if (iZERO_CLOCK_DIV == portZERO_CLOCK_DIV1024)
#define portZERO_CLOCK_CSN	5
#endif
#ifdef portZERO_CLOCK_Ext_clk_src_faling_edge
#define portZERO_CLOCK_CSN	6
#warning External clock source on Tn pin. Clock on falling edge
#endif
#ifdef portZERO_CLOCK_Ext_clk_src_faling_edge
#warning External clock source on Tn pin. Clock on rising edge
#define portZERO_CLOCK_CSN	7
#endif

//#include "kernel/variables.h"
	
/*------ Varables defined in varaibles.h------------------------------------*/
//volatile iClockFull current_time;

/*----------------------------------------------------------------------------*/
/** \file
 *\if russian_lng
 *	泽黻鲨