/* * Contiki PIC32 Port project * * Copyright (c) 2012, * Scuola Superiore Sant'Anna (http://www.sssup.it) and * Consorzio Nazionale Interuniversitario per le Telecomunicazioni * (http://www.cnit.it). * * 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. * */ /** * \addtogroup pic32 PIC32 Contiki Port * * @{ */ /** * \file pic32_timer.c * \brief TIMER interface for PIC32MX (pic32mx795f512l) * \author Giovanni Pellerano * \date 2012-03-26 */ /* * PIC32MX795F512L - Specific Functions * * All the functions in this part of the file are specific for the * pic32mx795f512l that is characterized by registers' name that differ from * the 3xx and 4xx families of the pic32mx. */ #define __TIMER_CODE_TEST__ 0 #if __TIMER_CODE_TEST__ #define __USE_TIMER__ 1 #define __USE_TIMER_1__ 1 #define __USE_TIMER_2__ 1 #define __USE_TIMER_3__ 1 #define __USE_TIMER_4__ 1 #define __USE_TIMER_5__ 1 #define __USE_TIMER_23__ 1 #define __USE_TIMER_45__ 1 #endif /* __TIMER_CODE_TEST__ */ #ifdef __USE_TIMER__ #include #include #include #include #include #include /*---------------------------------------------------------------------------*/ #define TIMERN_16(XX, TT, PP) \ void \ pic32_timer##XX##_enable_irq(void) \ { \ IFS0CLR = _IFS0_T##XX##IF_MASK; /* Clean Timer IRQ Flag */ \ IEC0SET = _IEC0_T##XX##IE_MASK; /* Enable Timer IRQ */ \ } \ \ void \ pic32_timer##XX##_disable_irq(void) \ { \ IEC0CLR = _IEC0_T##XX##IE_MASK; /* Disable Timer IRQ */ \ IFS0CLR = _IFS0_T##XX##IF_MASK; /* Clean Timer IRQ Flag */ \ } \ \ uint8_t \ pic32_timer##XX##_init(uint32_t frequency) \ { \ uint32_t prd = pic32_clock_get_peripheral_clock() / frequency; \ uint8_t tckps; /* Prescale */ \ uint8_t ok = 0; \ \ if(prd <= UINT16_MAX) { \ tckps = TIMER_##TT##_PRESCALE_1; \ ok = 1; \ } else { \ prd = prd / 8; \ } \ \ if(ok == 0) { \ if(prd <= UINT16_MAX) { \ tckps = TIMER_##TT##_PRESCALE_8; \ ok = 1; \ } else { \ prd = prd / 8; \ } \ } \ \ if(ok == 0) { \ if(prd <= UINT16_MAX) { \ tckps = TIMER_##TT##_PRESCALE_64; \ ok = 1; \ } else { \ prd = prd / 4; \ } \ } \ \ if(ok == 0) { \ if(prd <= UINT16_MAX) { \ tckps = TIMER_##TT##_PRESCALE_256; \ } else { \ return -TIMER_ERR_BAD_ARGS; \ } \ } \ \ pic32_timer##XX##_disable_irq(); \ \ IPC##XX##CLR = _IPC##XX##_T##XX##IP_MASK | _IPC##XX##_T##XX##IS_MASK; \ IPC##XX##SET = (7 << _IPC##XX##_T##XX##IP_POSITION) | (PP << _IPC##XX##_T##XX##IS_POSITION); \ T##XX##CON = 0; \ T##XX##CONSET = tckps << _T##XX##CON_TCKPS_POSITION; \ PR##XX = prd; \ TMR##XX = 0; \ \ return TIMER_NO_ERRORS; \ } \ \ void \ pic32_timer##XX##_start(void) \ { \ T##XX##CONSET = _T##XX##CON_ON_MASK; /* Start Timer */ \ } \ \ void \ pic32_timer##XX##_stop(void) \ { \ T##XX##CONCLR = _T##XX##CON_ON_MASK; /* Stop Timer */ \ } \ \ uint16_t \ pic32_timer##XX##_get_val(void) \ { \ return TMR##XX; \ } /*---------------------------------------------------------------------------*/ #define TIMERN_32(XX, YY, PP) \ \ void \ pic32_timer##XX##YY##_enable_irq(void) \ { \ pic32_timer##YY##_enable_irq(); \ } \ \ void \ pic32_timer##XX##YY##_disable_irq(void) \ { \ pic32_timer##YY##_disable_irq(); \ } \ \ uint8_t \ pic32_timer##XX##YY##_init(uint32_t frequency) \ { \ uint32_t prd = pic32_clock_get_peripheral_clock() / frequency; \ uint8_t tckps; /* Prescale */ \ uint8_t ok = 0; \ \ if(prd <= UINT16_MAX) { \ tckps = TIMER_B_PRESCALE_1; \ ok = 1; \ } else { \ prd = prd / 8; \ } \ \ if(ok == 0) { \ if(prd <= UINT16_MAX) { \ tckps = TIMER_B_PRESCALE_8; \ ok = 1; \ } else { \ prd = prd / 8; \ } \ } \ \ if(ok == 0) { \ if(prd <= UINT16_MAX) { \ tckps = TIMER_B_PRESCALE_64; \ ok = 1; \ } else { \ prd = prd / 4; \ } \ } \ \ if(ok == 0) { \ if(prd <= UINT16_MAX) { \ tckps = TIMER_B_PRESCALE_256; \ } else { \ return -TIMER_ERR_BAD_ARGS; \ } \ } \ \ pic32_timer##XX##_disable_irq(); \ \ IPC##YY##CLR = _IPC##YY##_T##YY##IP_MASK | _IPC##YY##_T##YY##IS_MASK; \ IPC##YY##SET = (7 << _IPC##YY##_T##YY##IP_POSITION) | (PP << _IPC##YY##_T##YY##IS_POSITION); \ T##XX##CON = 0; \ T##XX##CONSET = _T##XX##CON_T32_MASK | (tckps << _T##XX##CON_TCKPS_POSITION); \ PR##XX = prd; \ TMR##XX = 0; \ \ return TIMER_NO_ERRORS; \ } \ \ void \ pic32_timer##XX##YY##_start(void) \ { \ T##XX##CONSET = _T##XX##CON_ON_MASK; /* Start Timer */ \ } \ \ void \ pic32_timer##XX##YY##_stop(void) \ { \ T##XX##CONCLR = _T##XX##CON_ON_MASK; /* Stop Timer */ \ } \ \ uint32_t \ pic32_timer##XX##YY##_get_val(void) \ { \ return TMR##XX; \ } /*---------------------------------------------------------------------------*/ #ifdef __USE_TIMER_1__ TIMERN_16(1, A, 3) #endif /* __USE_TIMER_1__ */ #if defined(__USE_TIMER_2__) || defined(__USE_TIMER_23__) TIMERN_16(2, B, 2) #endif /* __USE_TIMER_2__ */ #if defined(__USE_TIMER_3__) || defined(__USE_TIMER_23__) TIMERN_16(3, B, 1) #endif /* __USE_TIMER_3__ */ #if defined(__USE_TIMER_4__) || defined(__USE_TIMER_45__) TIMERN_16(4, B, 1) #endif /* __USE_TIMER_4__ */ #if defined(__USE_TIMER_5__) || defined(__USE_TIMER_45__) TIMERN_16(5, B, 1) #endif /* __USE_TIMER_5__ */ #ifdef __USE_TIMER_23__ TIMERN_32(2, 3, 3) #endif /* __USE_TIMER_23__ */ #ifdef __USE_TIMER_45__ TIMERN_32(4, 5, 2) #endif /* __USE_TIMER_45__ */ #endif /* __USE_TIMER__ */ /** @} */