113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
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/*
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* Contiki PIC32 Port project
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*
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* Copyright (c) 2012,
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* Scuola Superiore Sant'Anna (http://www.sssup.it) and
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* Consorzio Nazionale Interuniversitario per le Telecomunicazioni
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* (http://www.cnit.it).
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*
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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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/**
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* \addtogroup pic32 PIC32 Contiki Port
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*
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* @{
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*/
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/**
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* \file rtimer-arch.c
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* \brief PIC32MX RTIMER routines
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* \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
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* \date 2012-04-11
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*/
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/*
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* PIC32MX795F512L - Specific Functions
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*
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* All the functions in this part of the file are specific for the
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* pic32mx795f512l that is characterized by registers' name that differ from
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* the 3xx and 4xx families of the pic32mx.
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*/
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#include <pic32_timer.h>
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#include "contiki.h"
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#include <sys/rtimer.h>
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#include <sys/clock.h>
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#include <stdio.h>
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#include <p32xxxx.h>
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static uint32_t schedule;
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/*---------------------------------------------------------------------------*/
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void
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rtimer_callback(void)
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{
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pic32_timer23_disable_irq();
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TMR2 = schedule;
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rtimer_run_next();
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}
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/*---------------------------------------------------------------------------*/
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void
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rtimer_arch_init(void)
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{
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pic32_timer23_disable_irq();
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IPC3CLR = _IPC3_T3IP_MASK | _IPC3_T3IS_MASK;
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IPC3SET = (7 << _IPC3_T3IP_POSITION) | (3 << _IPC3_T3IS_POSITION);
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T2CON = 0;
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T3CON = 0;
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T2CONSET = _T2CON_T32_MASK | (TIMER_B_PRESCALE_256 << _T2CON_TCKPS_POSITION);
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PR2 = 0xFFFFFFFF;
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TMR2 = 0;
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pic32_timer23_start();
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}
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/*---------------------------------------------------------------------------*/
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rtimer_clock_t
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rtimer_arch_now(void)
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{
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return TMR2;
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}
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/*---------------------------------------------------------------------------*/
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void
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rtimer_arch_schedule(rtimer_clock_t t)
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{
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schedule = t;
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PR2 = t;
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pic32_timer23_enable_irq();
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}
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/*---------------------------------------------------------------------------*/
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TIMER_INTERRUPT(3, rtimer_callback);
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/** @} */
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