127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*
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* Copyright (c) 2014, Analog Devices, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \author Ian Martin <martini@redwirellc.com>
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*/
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#include <time.h>
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#include "contiki.h"
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#ifndef BIT
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#define BIT(n) (1 << (n))
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#endif
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#define clock() (0xffff - TCR[CLOCK_CHANNEL])
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void
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clock_init(void)
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{
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#if (CLOCK_CHANNEL <= 7)
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TAU0EN = 1; /* Enable Timer Array Unit 0. */
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TT0 = 0x00ff; /* Stop the Timer Array Unit. */
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TPS0 = (TPS0 & 0xfff0) | CLOCK_SCALER;
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TMR[CLOCK_CHANNEL] = 0x0000; /* default value */
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#if (CLOCK_CHANNEL == 0)
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TDR00 = 0xffff;
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#elif (CLOCK_CHANNEL == 1)
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TDR01 = 0xffff;
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#elif (CLOCK_CHANNEL == 2)
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TDR02 = 0xffff;
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#elif (CLOCK_CHANNEL == 3)
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TDR03 = 0xffff;
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#elif (CLOCK_CHANNEL == 4)
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TDR04 = 0xffff;
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#elif (CLOCK_CHANNEL == 5)
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TDR05 = 0xffff;
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#elif (CLOCK_CHANNEL == 6)
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TDR06 = 0xffff;
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#elif (CLOCK_CHANNEL == 7)
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TDR07 = 0xffff;
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#else
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#error Invalid CLOCK_CHANNEL
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#endif
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TE0 |= BIT(CLOCK_CHANNEL); /* Start timer channel 0. */
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TS0 |= BIT(CLOCK_CHANNEL); /* Start counting. */
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#else
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TAU1EN = 1; /* Enable Timer Array Unit 1. */
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TT1 = 0x00ff; /* Stop the Timer Array Unit. */
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TPS1 = (TPS1 & 0xfff0) | CLOCK_SCALER;
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TMR[CLOCK_CHANNEL] = 0x0000; /* default value */
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#if (CLOCK_CHANNEL == 8)
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TDR00 = 0xffff;
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#elif (CLOCK_CHANNEL == 9)
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TDR01 = 0xffff;
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#elif (CLOCK_CHANNEL == 10)
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TDR02 = 0xffff;
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#elif (CLOCK_CHANNEL == 11)
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TDR03 = 0xffff;
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#elif (CLOCK_CHANNEL == 12)
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TDR04 = 0xffff;
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#elif (CLOCK_CHANNEL == 13)
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TDR05 = 0xffff;
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#elif (CLOCK_CHANNEL == 14)
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TDR06 = 0xffff;
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#elif (CLOCK_CHANNEL == 15)
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TDR07 = 0xffff;
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#else
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#error Invalid CLOCK_CHANNEL
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#endif
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TE1 |= BIT(CLOCK_CHANNEL); /* Start timer channel. */
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TS1 |= BIT(CLOCK_CHANNEL); /* Start counting. */
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#endif
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}
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/*---------------------------------------------------------------------------*/
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clock_time_t
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clock_time(void)
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{
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return clock();
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}
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/*---------------------------------------------------------------------------*/
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unsigned long
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clock_seconds(void)
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{
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return clock() / CLOCK_CONF_SECOND;
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_wait(clock_time_t t)
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{
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clock_time_t t0;
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t0 = clock();
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while(clock() - t0 < t) ;
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}
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