284 lines
20 KiB
C
284 lines
20 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 pic32_timer.c
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* \brief TIMER interface for PIC32MX (pic32mx795f512l)
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* \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
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* \date 2012-03-26
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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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#define __TIMER_CODE_TEST__ 0
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#if __TIMER_CODE_TEST__
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#define __USE_TIMER__ 1
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#define __USE_TIMER_1__ 1
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#define __USE_TIMER_2__ 1
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#define __USE_TIMER_3__ 1
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#define __USE_TIMER_4__ 1
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#define __USE_TIMER_5__ 1
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#define __USE_TIMER_23__ 1
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#define __USE_TIMER_45__ 1
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#endif /* __TIMER_CODE_TEST__ */
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#ifdef __USE_TIMER__
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#include <pic32_timer.h>
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#include <pic32_clock.h>
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#include <pic32_irq.h>
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#include <p32xxxx.h>
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#include <stdint.h>
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#include <stddef.h>
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/*---------------------------------------------------------------------------*/
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#define TIMERN_16(XX, TT, PP) \
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void \
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pic32_timer##XX##_enable_irq(void) \
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{ \
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IFS0CLR = _IFS0_T##XX##IF_MASK; /* Clean Timer IRQ Flag */ \
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IEC0SET = _IEC0_T##XX##IE_MASK; /* Enable Timer IRQ */ \
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} \
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\
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void \
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pic32_timer##XX##_disable_irq(void) \
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{ \
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IEC0CLR = _IEC0_T##XX##IE_MASK; /* Disable Timer IRQ */ \
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IFS0CLR = _IFS0_T##XX##IF_MASK; /* Clean Timer IRQ Flag */ \
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} \
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\
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uint8_t \
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pic32_timer##XX##_init(uint32_t frequency) \
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{ \
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uint32_t prd = pic32_clock_get_peripheral_clock() / frequency; \
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uint8_t tckps; /* Prescale */ \
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uint8_t ok = 0; \
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\
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_##TT##_PRESCALE_1; \
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ok = 1; \
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} else { \
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prd = prd / 8; \
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} \
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\
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if(ok == 0) { \
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_##TT##_PRESCALE_8; \
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ok = 1; \
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} else { \
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prd = prd / 8; \
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} \
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} \
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\
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if(ok == 0) { \
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_##TT##_PRESCALE_64; \
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ok = 1; \
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} else { \
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prd = prd / 4; \
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} \
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} \
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\
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if(ok == 0) { \
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_##TT##_PRESCALE_256; \
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} else { \
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return -TIMER_ERR_BAD_ARGS; \
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} \
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} \
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\
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pic32_timer##XX##_disable_irq(); \
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\
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IPC##XX##CLR = _IPC##XX##_T##XX##IP_MASK | _IPC##XX##_T##XX##IS_MASK; \
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IPC##XX##SET = (7 << _IPC##XX##_T##XX##IP_POSITION) | (PP << _IPC##XX##_T##XX##IS_POSITION); \
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T##XX##CON = 0; \
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T##XX##CONSET = tckps << _T##XX##CON_TCKPS_POSITION; \
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PR##XX = prd; \
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TMR##XX = 0; \
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\
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return TIMER_NO_ERRORS; \
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} \
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\
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void \
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pic32_timer##XX##_start(void) \
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{ \
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T##XX##CONSET = _T##XX##CON_ON_MASK; /* Start Timer */ \
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} \
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\
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void \
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pic32_timer##XX##_stop(void) \
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{ \
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T##XX##CONCLR = _T##XX##CON_ON_MASK; /* Stop Timer */ \
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} \
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\
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uint16_t \
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pic32_timer##XX##_get_val(void) \
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{ \
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return TMR##XX; \
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}
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/*---------------------------------------------------------------------------*/
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#define TIMERN_32(XX, YY, PP) \
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\
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void \
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pic32_timer##XX##YY##_enable_irq(void) \
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{ \
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pic32_timer##YY##_enable_irq(); \
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} \
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\
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void \
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pic32_timer##XX##YY##_disable_irq(void) \
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{ \
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pic32_timer##YY##_disable_irq(); \
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} \
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\
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uint8_t \
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pic32_timer##XX##YY##_init(uint32_t frequency) \
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{ \
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uint32_t prd = pic32_clock_get_peripheral_clock() / frequency; \
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uint8_t tckps; /* Prescale */ \
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uint8_t ok = 0; \
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\
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_B_PRESCALE_1; \
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ok = 1; \
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} else { \
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prd = prd / 8; \
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} \
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\
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if(ok == 0) { \
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_B_PRESCALE_8; \
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ok = 1; \
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} else { \
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prd = prd / 8; \
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} \
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} \
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\
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if(ok == 0) { \
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_B_PRESCALE_64; \
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ok = 1; \
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} else { \
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prd = prd / 4; \
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} \
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} \
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\
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if(ok == 0) { \
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if(prd <= UINT16_MAX) { \
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tckps = TIMER_B_PRESCALE_256; \
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} else { \
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return -TIMER_ERR_BAD_ARGS; \
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} \
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} \
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\
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pic32_timer##XX##_disable_irq(); \
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\
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IPC##YY##CLR = _IPC##YY##_T##YY##IP_MASK | _IPC##YY##_T##YY##IS_MASK; \
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IPC##YY##SET = (7 << _IPC##YY##_T##YY##IP_POSITION) | (PP << _IPC##YY##_T##YY##IS_POSITION); \
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T##XX##CON = 0; \
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T##XX##CONSET = _T##XX##CON_T32_MASK | (tckps << _T##XX##CON_TCKPS_POSITION); \
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PR##XX = prd; \
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TMR##XX = 0; \
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\
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return TIMER_NO_ERRORS; \
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} \
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\
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void \
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pic32_timer##XX##YY##_start(void) \
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{ \
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T##XX##CONSET = _T##XX##CON_ON_MASK; /* Start Timer */ \
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} \
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\
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void \
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pic32_timer##XX##YY##_stop(void) \
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{ \
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T##XX##CONCLR = _T##XX##CON_ON_MASK; /* Stop Timer */ \
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} \
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\
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uint32_t \
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pic32_timer##XX##YY##_get_val(void) \
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{ \
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return TMR##XX; \
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}
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/*---------------------------------------------------------------------------*/
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#ifdef __USE_TIMER_1__
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TIMERN_16(1, A, 3)
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#endif /* __USE_TIMER_1__ */
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#if defined(__USE_TIMER_2__) || defined(__USE_TIMER_23__)
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TIMERN_16(2, B, 2)
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#endif /* __USE_TIMER_2__ */
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#if defined(__USE_TIMER_3__) || defined(__USE_TIMER_23__)
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TIMERN_16(3, B, 1)
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#endif /* __USE_TIMER_3__ */
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#if defined(__USE_TIMER_4__) || defined(__USE_TIMER_45__)
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TIMERN_16(4, B, 1)
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#endif /* __USE_TIMER_4__ */
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#if defined(__USE_TIMER_5__) || defined(__USE_TIMER_45__)
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TIMERN_16(5, B, 1)
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#endif /* __USE_TIMER_5__ */
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#ifdef __USE_TIMER_23__
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TIMERN_32(2, 3, 3)
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#endif /* __USE_TIMER_23__ */
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#ifdef __USE_TIMER_45__
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TIMERN_32(4, 5, 2)
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#endif /* __USE_TIMER_45__ */
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#endif /* __USE_TIMER__ */
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/** @} */
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