134 lines
4.6 KiB
C
134 lines
4.6 KiB
C
/*
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* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
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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 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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* \addtogroup cc26xx-rtc
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* @{
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*
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*/
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/**
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* \file
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* Implementation of the CC26xx AON RTC driver
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*/
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#include "contiki.h"
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#include "sys/energest.h"
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#include "rtimer.h"
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#include "lpm.h"
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#include "ti-lib.h"
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#include <stdint.h>
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#include <stdbool.h>
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/*---------------------------------------------------------------------------*/
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#define cc26xx_rtc_isr(...) AONRTCIntHandler(__VA_ARGS__)
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/*---------------------------------------------------------------------------*/
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/* Prototype of a function in clock.c. Called every time the handler fires */
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void clock_update(void);
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/*---------------------------------------------------------------------------*/
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void
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cc26xx_rtc_init(void)
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{
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uint32_t compare_value;
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bool interrupts_disabled;
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/* Disable and clear interrupts */
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interrupts_disabled = ti_lib_int_master_disable();
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ti_lib_aon_rtc_disable();
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ti_lib_aon_rtc_event_clear(AON_RTC_CH0);
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ti_lib_aon_rtc_event_clear(AON_RTC_CH2);
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/* Setup the wakeup event */
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ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU0, AON_EVENT_RTC0);
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ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU1, AON_EVENT_RTC2);
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ti_lib_aon_rtc_combined_event_config(AON_RTC_CH0 | AON_RTC_CH2);
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/* Configure channel 2 in continuous compare, 128 ticks / sec */
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ti_lib_aon_rtc_inc_value_ch2_set(RTIMER_SECOND / CLOCK_SECOND);
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ti_lib_aon_rtc_mode_ch2_set(AON_RTC_MODE_CH2_CONTINUOUS);
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compare_value = (RTIMER_SECOND / CLOCK_SECOND) +
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ti_lib_aon_rtc_current_compare_value_get();
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ti_lib_aon_rtc_compare_value_set(AON_RTC_CH2, compare_value);
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/* Enable channel 2 and the RTC */
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ti_lib_aon_rtc_channel_enable(AON_RTC_CH2);
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ti_lib_aon_rtc_enable();
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ti_lib_int_enable(INT_AON_RTC);
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/* Re-enable interrupts */
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if(!interrupts_disabled) {
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ti_lib_int_master_enable();
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}
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}
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/*---------------------------------------------------------------------------*/
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rtimer_clock_t
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cc26xx_rtc_get_next_trigger()
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{
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rtimer_clock_t ch2 = ti_lib_aon_rtc_compare_value_get(AON_RTC_CH2);
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if(HWREG(AON_RTC_BASE + AON_RTC_O_CHCTL) & AON_RTC_CHCTL_CH0_EN) {
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rtimer_clock_t ch0 = ti_lib_aon_rtc_compare_value_get(AON_RTC_CH2);
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return RTIMER_CLOCK_LT(ch0, ch2) ? ch0 : ch2;
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}
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return ch2;
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}
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/*---------------------------------------------------------------------------*/
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void
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cc26xx_rtc_schedule_one_shot(uint32_t ticks)
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{
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/* Set the channel to fire a one-shot compare event at time==ticks */
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ti_lib_aon_rtc_compare_value_set(AON_RTC_CH0, ticks);
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ti_lib_aon_rtc_channel_enable(AON_RTC_CH0);
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}
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/*---------------------------------------------------------------------------*/
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/* The AON RTC interrupt handler */
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void
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cc26xx_rtc_isr(void)
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{
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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if(ti_lib_aon_rtc_event_get(AON_RTC_CH0)) {
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ti_lib_aon_rtc_event_clear(AON_RTC_CH0);
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rtimer_run_next();
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}
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if(ti_lib_aon_rtc_event_get(AON_RTC_CH2)) {
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ti_lib_aon_rtc_event_clear(AON_RTC_CH2);
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clock_update();
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}
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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