Fixed line endings and SVN props with fixup.sh script
This commit is contained in:
skarg
@@ -1,327 +1,327 @@
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/**
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* \file
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*
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* \brief AVR XMEGA 32-bit Real Time Counter driver
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*
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* Copyright (c) 2010-2012 Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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*
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||||
* \page License
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||||
*
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||||
* 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.
|
||||
*
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||||
* 3. The name of Atmel may not be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
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||||
* 4. This software may only be redistributed and used in connection with an
|
||||
* Atmel microcontroller product.
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||||
*
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||||
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
|
||||
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
|
||||
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* 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,
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||||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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||||
* POSSIBILITY OF SUCH DAMAGE.
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*
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* \asf_license_stop
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*
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*/
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#include <compiler.h>
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#include <parts.h>
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#include <sysclk.h>
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#include <delay.h>
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#include "rtc32.h"
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#ifdef __ICCAVR__
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# define _DWORDREGISTER DWORDREGISTER
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#endif
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/**
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* \internal
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* Workaround for missing CNT, PER and COMP in WinAVR header files
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* \todo Remove when header files are fixed if WinAVR release
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*/
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typedef struct RTC32_struct2 {
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register8_t CTRL;
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register8_t SYNCCTRL;
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register8_t INTCTRL;
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register8_t INTFLAGS;
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_DWORDREGISTER(CNT);
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_DWORDREGISTER(PER);
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_DWORDREGISTER(COMP);
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} RTC32_t2;
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#undef RTC32
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/**
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* \internal
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* Workaround for missing CNT, PER and COMP in WinAVR header files
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* \todo Remove when header files are fixed if WinAVR release
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*/
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#define RTC32 (*(RTC32_t2 *)0x0420)
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#ifdef CONFIG_RTC32_COMPARE_INT_LEVEL
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# define RTC32_COMPARE_INT_LEVEL CONFIG_RTC32_COMPARE_INT_LEVEL
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#else
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# define RTC32_COMPARE_INT_LEVEL RTC32_COMPINTLVL_LO_gc
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#endif
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#ifdef CONFIG_RTC32_CLOCK_1024HZ
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# define RTC32_CLOCK VBAT_XOSCSEL_bm
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#else
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# define RTC32_CLOCK 0
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#endif
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/**
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* \internal
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* \brief Driver private struct
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*/
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struct rtc_data_struct {
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//! Callback function to use on alarm
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rtc_callback_t callback;
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};
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/**
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* \internal
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* \brief Driver private data
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*/
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struct rtc_data_struct rtc_data;
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/**
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* \internal
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* \brief Check if RTC32 is busy synchronizing
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*
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* \retval true Is busy
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* \retval false Is ready
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*/
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static __always_inline bool rtc_is_busy(void)
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{
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return RTC32.SYNCCTRL & RTC32_SYNCBUSY_bm;
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}
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/**
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* \internal
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* \brief Get counter
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*
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* \return Counter value
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*/
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static inline uint32_t rtc_get_counter(void)
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{
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RTC32.SYNCCTRL = RTC32_SYNCCNT_bm;
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while (RTC32.SYNCCTRL & RTC32_SYNCCNT_bm);
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return RTC32.CNT;
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}
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/**
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* \brief Set current time
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*
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* \param time Time value to set
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*/
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void rtc_set_time(uint32_t time)
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{
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RTC32.CTRL = 0;
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while (rtc_is_busy());
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RTC32.CNT = time;
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RTC32.CTRL = RTC32_ENABLE_bm;
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}
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/**
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* \brief Get current time
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*
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* \return Current time value
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*/
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uint32_t rtc_get_time(void)
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{
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return rtc_get_counter();
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}
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/**
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* \brief Set alarm time
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*
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* Will set absolute time of the alarm that will call the callback function
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* specified by \ref rtc_set_callback on expiration. Alternatively, you may
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* use \ref rtc_alarm_has_triggered to check if the alarm has expired.
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*
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* Any pending alarm will be overwritten with this function.
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*
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* \param time Absolute time value. See also \ref rtc32_min_alarm_time
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* \pre Needs interrupts disabled if used from several contexts
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*/
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void rtc_set_alarm(uint32_t time)
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{
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RTC32.INTCTRL = RTC32_COMPARE_INT_LEVEL;
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RTC32.COMP = time;
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RTC32.INTFLAGS = RTC32_COMPIF_bm;
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}
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/**
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* \brief Check if pending alarm has triggered
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*
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* \retval true Alarm has triggered
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* \retval false Alarm is pending
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*/
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bool rtc_alarm_has_triggered(void)
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{
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// Interrupt enable is used on pending alarm
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return !(RTC32.INTCTRL & RTC32_COMPARE_INT_LEVEL);
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}
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/**
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* \brief Set callback to call on alarm
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*
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* \param callback Callback function pointer
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*/
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void rtc_set_callback(rtc_callback_t callback)
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{
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rtc_data.callback = callback;
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}
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/**
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* \brief Checks battery backup system status.
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*
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* This function should be called once after each reset of the device in order
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* to determine the current battery backup status.
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* This function can not be used to continuously poll the status of the backup
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* system during normal operation since most status flags are only latched
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* during the power up sequence of the device.
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*
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* \param first_time_startup Indicates whether or not the VBAT system has been
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* started previously. This should be set to \c true upon the first call to this
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* function, and \c false upon later calls. Typically, the value for this
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* parameter should be stored in, e.g., EEPROM, in order to preserve the value
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* when main system power is lost.
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*
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* \returns Battery backup system status.
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*/
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enum vbat_status_code rtc_vbat_system_check(bool first_time_startup)
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{
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enum vbat_status_code vbat_status;
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uint8_t flags = VBAT.STATUS;
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/* Ensure the module is clocked to be able to check the registers */
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sysclk_enable_module(SYSCLK_PORT_GEN, SYSCLK_RTC);
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/*
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* Check if a sufficient voltage was detected on the VBAT input.
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* The brown-out detector (BBBOD) will be sampled once when the
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* device starts up and the result is visible as the BBPWR flag.
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*/
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if (flags & VBAT_BBPWR_bm) {
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vbat_status = VBAT_STATUS_NO_POWER;
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} else {
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/*
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* We have sufficient power, now we check if a power-on-reset
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* (BBPOR) was detected on VBAT. This is visible from the BBPORF
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* flag which is also only updated once when the device starts.
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*/
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if (flags & VBAT_BBPORF_bm) {
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if (first_time_startup) {
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vbat_status = VBAT_STATUS_INIT;
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} else {
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vbat_status = VBAT_STATUS_BBPOR;
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}
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} else if (flags & VBAT_BBBORF_bm) {
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vbat_status = VBAT_STATUS_BBBOD;
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} else {
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VBAT.CTRL = VBAT_ACCEN_bm;
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if (flags & VBAT_XOSCFAIL_bm) {
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vbat_status = VBAT_STATUS_XOSCFAIL;
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} else {
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vbat_status = VBAT_STATUS_OK;
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}
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}
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}
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return vbat_status;
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}
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/**
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* \internal
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* \brief Initialize VBAT and start 32kHz oscillator
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*
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* Enables access to the VBAT system, performs a reset, enables the failure
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* detection, and starts the oscillator.
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*
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* The default clock rate to the RTC32 is 1Hz but this can be changed to 1024Hz
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* by the user in the module configuration by defining
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* \ref CONFIG_RTC32_CLOCK_1024HZ.
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*/
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static void vbat_init(void)
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{
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// Enable access to VBAT
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VBAT.CTRL |= VBAT_ACCEN_bm;
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ccp_write_io((void *) &VBAT.CTRL, VBAT_RESET_bm);
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VBAT.CTRL |= VBAT_XOSCFDEN_bm;
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/* This delay is needed to give the voltage in the backup system some
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* time to stabilize before we turn on the oscillator. If we do not
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* have this delay we may get a failure detection.
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*/
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delay_us(200);
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VBAT.CTRL |= VBAT_XOSCEN_bm | RTC32_CLOCK;
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while (!(VBAT.STATUS & VBAT_XOSCRDY_bm));
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}
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/**
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* \brief Initialize the 32kHz oscillator and RTC32
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*
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* Starts up the 32kHz oscillator in the backup system and initializes the
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* RTC32.
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*
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* \note When the backup system is used, the function \ref
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* rtc_vbat_system_check should be called to determine if a re-initialization
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* must be done.
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*/
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void rtc_init(void)
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{
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sysclk_enable_module(SYSCLK_PORT_GEN, SYSCLK_RTC);
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// Set up VBAT system and start oscillator
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vbat_init();
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// Disable the RTC32 module before setting it up
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RTC32.CTRL = 0;
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while (rtc_is_busy());
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// Set up maximum period and start at 0
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RTC32.PER = 0xffffffff;
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RTC32.CNT = 0;
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while (rtc_is_busy());
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RTC32.INTCTRL = 0;
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RTC32.CTRL = RTC32_ENABLE_bm;
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// Make sure it's sync'ed before return
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while (rtc_is_busy());
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}
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/**
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* \internal
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* \brief Compare interrupt used for alarm
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*
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* Disables the RTC32 interrupts, then calls the alarm callback function if one
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* has been set.
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*/
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ISR(RTC32_COMP_vect)
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{
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RTC32.INTCTRL = 0;
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if (rtc_data.callback)
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rtc_data.callback(rtc_get_time());
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}
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/**
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* \file
|
||||
*
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* \brief AVR XMEGA 32-bit Real Time Counter driver
|
||||
*
|
||||
* Copyright (c) 2010-2012 Atmel Corporation. All rights reserved.
|
||||
*
|
||||
* \asf_license_start
|
||||
*
|
||||
* \page License
|
||||
*
|
||||
* 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. The name of Atmel may not be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* 4. This software may only be redistributed and used in connection with an
|
||||
* Atmel microcontroller product.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
|
||||
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
|
||||
*
|
||||
* \asf_license_stop
|
||||
*
|
||||
*/
|
||||
#include <compiler.h>
|
||||
#include <parts.h>
|
||||
#include <sysclk.h>
|
||||
#include <delay.h>
|
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#include "rtc32.h"
|
||||
|
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#ifdef __ICCAVR__
|
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# define _DWORDREGISTER DWORDREGISTER
|
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#endif
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* Workaround for missing CNT, PER and COMP in WinAVR header files
|
||||
* \todo Remove when header files are fixed if WinAVR release
|
||||
*/
|
||||
typedef struct RTC32_struct2 {
|
||||
register8_t CTRL;
|
||||
register8_t SYNCCTRL;
|
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register8_t INTCTRL;
|
||||
register8_t INTFLAGS;
|
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_DWORDREGISTER(CNT);
|
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_DWORDREGISTER(PER);
|
||||
_DWORDREGISTER(COMP);
|
||||
} RTC32_t2;
|
||||
|
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#undef RTC32
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* Workaround for missing CNT, PER and COMP in WinAVR header files
|
||||
* \todo Remove when header files are fixed if WinAVR release
|
||||
*/
|
||||
#define RTC32 (*(RTC32_t2 *)0x0420)
|
||||
|
||||
#ifdef CONFIG_RTC32_COMPARE_INT_LEVEL
|
||||
# define RTC32_COMPARE_INT_LEVEL CONFIG_RTC32_COMPARE_INT_LEVEL
|
||||
#else
|
||||
# define RTC32_COMPARE_INT_LEVEL RTC32_COMPINTLVL_LO_gc
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_RTC32_CLOCK_1024HZ
|
||||
# define RTC32_CLOCK VBAT_XOSCSEL_bm
|
||||
#else
|
||||
# define RTC32_CLOCK 0
|
||||
#endif
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* \brief Driver private struct
|
||||
*/
|
||||
struct rtc_data_struct {
|
||||
//! Callback function to use on alarm
|
||||
rtc_callback_t callback;
|
||||
};
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* \brief Driver private data
|
||||
*/
|
||||
struct rtc_data_struct rtc_data;
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* \brief Check if RTC32 is busy synchronizing
|
||||
*
|
||||
* \retval true Is busy
|
||||
* \retval false Is ready
|
||||
*/
|
||||
static __always_inline bool rtc_is_busy(void)
|
||||
{
|
||||
return RTC32.SYNCCTRL & RTC32_SYNCBUSY_bm;
|
||||
}
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* \brief Get counter
|
||||
*
|
||||
* \return Counter value
|
||||
*/
|
||||
static inline uint32_t rtc_get_counter(void)
|
||||
{
|
||||
RTC32.SYNCCTRL = RTC32_SYNCCNT_bm;
|
||||
while (RTC32.SYNCCTRL & RTC32_SYNCCNT_bm);
|
||||
return RTC32.CNT;
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Set current time
|
||||
*
|
||||
* \param time Time value to set
|
||||
*/
|
||||
void rtc_set_time(uint32_t time)
|
||||
{
|
||||
RTC32.CTRL = 0;
|
||||
|
||||
while (rtc_is_busy());
|
||||
|
||||
RTC32.CNT = time;
|
||||
RTC32.CTRL = RTC32_ENABLE_bm;
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Get current time
|
||||
*
|
||||
* \return Current time value
|
||||
*/
|
||||
uint32_t rtc_get_time(void)
|
||||
{
|
||||
return rtc_get_counter();
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Set alarm time
|
||||
*
|
||||
* Will set absolute time of the alarm that will call the callback function
|
||||
* specified by \ref rtc_set_callback on expiration. Alternatively, you may
|
||||
* use \ref rtc_alarm_has_triggered to check if the alarm has expired.
|
||||
*
|
||||
* Any pending alarm will be overwritten with this function.
|
||||
*
|
||||
* \param time Absolute time value. See also \ref rtc32_min_alarm_time
|
||||
* \pre Needs interrupts disabled if used from several contexts
|
||||
*/
|
||||
void rtc_set_alarm(uint32_t time)
|
||||
{
|
||||
RTC32.INTCTRL = RTC32_COMPARE_INT_LEVEL;
|
||||
RTC32.COMP = time;
|
||||
RTC32.INTFLAGS = RTC32_COMPIF_bm;
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Check if pending alarm has triggered
|
||||
*
|
||||
* \retval true Alarm has triggered
|
||||
* \retval false Alarm is pending
|
||||
*/
|
||||
bool rtc_alarm_has_triggered(void)
|
||||
{
|
||||
// Interrupt enable is used on pending alarm
|
||||
return !(RTC32.INTCTRL & RTC32_COMPARE_INT_LEVEL);
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Set callback to call on alarm
|
||||
*
|
||||
* \param callback Callback function pointer
|
||||
*/
|
||||
void rtc_set_callback(rtc_callback_t callback)
|
||||
{
|
||||
rtc_data.callback = callback;
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Checks battery backup system status.
|
||||
*
|
||||
* This function should be called once after each reset of the device in order
|
||||
* to determine the current battery backup status.
|
||||
* This function can not be used to continuously poll the status of the backup
|
||||
* system during normal operation since most status flags are only latched
|
||||
* during the power up sequence of the device.
|
||||
*
|
||||
* \param first_time_startup Indicates whether or not the VBAT system has been
|
||||
* started previously. This should be set to \c true upon the first call to this
|
||||
* function, and \c false upon later calls. Typically, the value for this
|
||||
* parameter should be stored in, e.g., EEPROM, in order to preserve the value
|
||||
* when main system power is lost.
|
||||
*
|
||||
* \returns Battery backup system status.
|
||||
*/
|
||||
enum vbat_status_code rtc_vbat_system_check(bool first_time_startup)
|
||||
{
|
||||
enum vbat_status_code vbat_status;
|
||||
uint8_t flags = VBAT.STATUS;
|
||||
|
||||
/* Ensure the module is clocked to be able to check the registers */
|
||||
sysclk_enable_module(SYSCLK_PORT_GEN, SYSCLK_RTC);
|
||||
|
||||
/*
|
||||
* Check if a sufficient voltage was detected on the VBAT input.
|
||||
* The brown-out detector (BBBOD) will be sampled once when the
|
||||
* device starts up and the result is visible as the BBPWR flag.
|
||||
*/
|
||||
if (flags & VBAT_BBPWR_bm) {
|
||||
vbat_status = VBAT_STATUS_NO_POWER;
|
||||
} else {
|
||||
/*
|
||||
* We have sufficient power, now we check if a power-on-reset
|
||||
* (BBPOR) was detected on VBAT. This is visible from the BBPORF
|
||||
* flag which is also only updated once when the device starts.
|
||||
*/
|
||||
if (flags & VBAT_BBPORF_bm) {
|
||||
if (first_time_startup) {
|
||||
vbat_status = VBAT_STATUS_INIT;
|
||||
} else {
|
||||
vbat_status = VBAT_STATUS_BBPOR;
|
||||
}
|
||||
} else if (flags & VBAT_BBBORF_bm) {
|
||||
vbat_status = VBAT_STATUS_BBBOD;
|
||||
} else {
|
||||
VBAT.CTRL = VBAT_ACCEN_bm;
|
||||
if (flags & VBAT_XOSCFAIL_bm) {
|
||||
vbat_status = VBAT_STATUS_XOSCFAIL;
|
||||
} else {
|
||||
vbat_status = VBAT_STATUS_OK;
|
||||
}
|
||||
}
|
||||
}
|
||||
return vbat_status;
|
||||
}
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* \brief Initialize VBAT and start 32kHz oscillator
|
||||
*
|
||||
* Enables access to the VBAT system, performs a reset, enables the failure
|
||||
* detection, and starts the oscillator.
|
||||
*
|
||||
* The default clock rate to the RTC32 is 1Hz but this can be changed to 1024Hz
|
||||
* by the user in the module configuration by defining
|
||||
* \ref CONFIG_RTC32_CLOCK_1024HZ.
|
||||
*/
|
||||
static void vbat_init(void)
|
||||
{
|
||||
// Enable access to VBAT
|
||||
VBAT.CTRL |= VBAT_ACCEN_bm;
|
||||
|
||||
ccp_write_io((void *) &VBAT.CTRL, VBAT_RESET_bm);
|
||||
|
||||
VBAT.CTRL |= VBAT_XOSCFDEN_bm;
|
||||
/* This delay is needed to give the voltage in the backup system some
|
||||
* time to stabilize before we turn on the oscillator. If we do not
|
||||
* have this delay we may get a failure detection.
|
||||
*/
|
||||
delay_us(200);
|
||||
VBAT.CTRL |= VBAT_XOSCEN_bm | RTC32_CLOCK;
|
||||
while (!(VBAT.STATUS & VBAT_XOSCRDY_bm));
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Initialize the 32kHz oscillator and RTC32
|
||||
*
|
||||
* Starts up the 32kHz oscillator in the backup system and initializes the
|
||||
* RTC32.
|
||||
*
|
||||
* \note When the backup system is used, the function \ref
|
||||
* rtc_vbat_system_check should be called to determine if a re-initialization
|
||||
* must be done.
|
||||
*/
|
||||
void rtc_init(void)
|
||||
{
|
||||
sysclk_enable_module(SYSCLK_PORT_GEN, SYSCLK_RTC);
|
||||
// Set up VBAT system and start oscillator
|
||||
vbat_init();
|
||||
|
||||
// Disable the RTC32 module before setting it up
|
||||
RTC32.CTRL = 0;
|
||||
|
||||
while (rtc_is_busy());
|
||||
|
||||
// Set up maximum period and start at 0
|
||||
RTC32.PER = 0xffffffff;
|
||||
RTC32.CNT = 0;
|
||||
|
||||
while (rtc_is_busy());
|
||||
|
||||
RTC32.INTCTRL = 0;
|
||||
RTC32.CTRL = RTC32_ENABLE_bm;
|
||||
|
||||
// Make sure it's sync'ed before return
|
||||
while (rtc_is_busy());
|
||||
}
|
||||
|
||||
/**
|
||||
* \internal
|
||||
* \brief Compare interrupt used for alarm
|
||||
*
|
||||
* Disables the RTC32 interrupts, then calls the alarm callback function if one
|
||||
* has been set.
|
||||
*/
|
||||
ISR(RTC32_COMP_vect)
|
||||
{
|
||||
RTC32.INTCTRL = 0;
|
||||
if (rtc_data.callback)
|
||||
rtc_data.callback(rtc_get_time());
|
||||
}
|
||||
|
||||
@@ -1,324 +1,324 @@
|
||||
/**
|
||||
* \file
|
||||
*
|
||||
* \brief AVR XMEGA 32-bit Real Time Counter driver definitions
|
||||
*
|
||||
* Copyright (c) 2010-2012 Atmel Corporation. All rights reserved.
|
||||
*
|
||||
* \asf_license_start
|
||||
*
|
||||
* \page License
|
||||
*
|
||||
* 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. The name of Atmel may not be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* 4. This software may only be redistributed and used in connection with an
|
||||
* Atmel microcontroller product.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
|
||||
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
|
||||
*
|
||||
* \asf_license_stop
|
||||
*
|
||||
*/
|
||||
#ifndef DRIVERS_RTC32_RTC32_H
|
||||
#define DRIVERS_RTC32_RTC32_H
|
||||
|
||||
#include <compiler.h>
|
||||
#include <conf_rtc32.h>
|
||||
|
||||
/**
|
||||
* \defgroup rtc32_group 32-bit Real Time Counter (RTC32)
|
||||
*
|
||||
* See \ref xmega_rtc32_quickstart.
|
||||
*
|
||||
* This is a driver implementation for the XMEGA RTC32.
|
||||
*
|
||||
* This driver can be used to keep track of time; setting alarms, with or
|
||||
* without function callbacks; initializing and checking the battery backup
|
||||
* system.
|
||||
*
|
||||
* \section rtc32_min_alarm_time Minimum allowed alarm time
|
||||
*
|
||||
* Due to the RTC32 clock synchronization, there is a minimum alarm time that
|
||||
* will generate a interrupt. This minimum time is 2 RTC32 clock cycles.
|
||||
*
|
||||
* Also, if a new RTC32 clock cycle is imminent at the time of setting the
|
||||
* alarm, there is a risk that it will be missed even with the value 2. If there
|
||||
* is a risk that this may occur, it is recommended to use a minimum alarm time
|
||||
* of 3.
|
||||
*
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \def CONFIG_RTC32_COMPARE_INT_LEVEL
|
||||
* \brief Configuration symbol for interrupt level to use on alarm
|
||||
*
|
||||
* Define this in \ref conf_rtc32.h as the desired interrupt level, or leave it
|
||||
* undefined to use the default.
|
||||
*/
|
||||
#ifdef __DOXYGEN__
|
||||
# define CONFIG_RTC32_COMPARE_INT_LEVEL
|
||||
#endif
|
||||
|
||||
/**
|
||||
* \def CONFIG_RTC32_CLOCK_1024HZ
|
||||
* \brief Configuration symbol for selecting 1024Hz clock instead of 1Hz
|
||||
*
|
||||
* Define this in \ref conf_rtc32.h if 1024Hz clock is desired. Otherwise, leave
|
||||
* it undefined.
|
||||
*/
|
||||
#ifdef __DOXYGEN__
|
||||
# define CONFIG_RTC32_CLOCK_1024HZ
|
||||
#endif
|
||||
|
||||
//! \brief Battery backup system status codes
|
||||
enum vbat_status_code
|
||||
{
|
||||
/**
|
||||
* \brief Backup system is operating and no errors were detected.
|
||||
*
|
||||
* The backup system is configured and had no issues while main power was
|
||||
* lost. Hence, all data stored in the backup domain is valid.
|
||||
*/
|
||||
VBAT_STATUS_OK,
|
||||
|
||||
/**
|
||||
* \brief No power detected on VBAT.
|
||||
*
|
||||
* No power was detected on the VBAT pin and therefore all data within the
|
||||
* backup system is invalid.
|
||||
*
|
||||
* The voltage on the VBAT pin is only sampled after a POR of the device,
|
||||
* therefore it is not possible to detect any voltage loss on the VBAT pin
|
||||
* during normal operation of the device.
|
||||
*/
|
||||
VBAT_STATUS_NO_POWER,
|
||||
|
||||
/**
|
||||
* \brief The backup system must be initialized.
|
||||
*
|
||||
* A POR was detected on VBAT input, indicating that a supply was connected to
|
||||
* the VBAT pin. Since this is also the first start-up of the device, it is
|
||||
* necessary to initialize the RTC32.
|
||||
*/
|
||||
VBAT_STATUS_INIT,
|
||||
|
||||
/**
|
||||
* \brief A POR was detected on the VBAT input.
|
||||
*
|
||||
* POR detection also works while the VBAT system is powered from main power,
|
||||
* but the detection flag is only latched after a POR of the main system.
|
||||
* A POR can happen when the power is lost and restored again on the VBAT pin
|
||||
* while main power was also not present, or even when main power was present,
|
||||
* but in this case the flag will only be latched after the next POR of the main
|
||||
* system.
|
||||
* If a POR is detected on VBAT, it should always be treated as if the backup
|
||||
* system is in an unknown state, i.e., that all data is invalid.
|
||||
*/
|
||||
VBAT_STATUS_BBPOR,
|
||||
|
||||
/**
|
||||
* \brief A brown-out was detected on the VBAT input.
|
||||
*
|
||||
* The backup system is in an unknown state and therefore the time in the RTC32
|
||||
* is invalid. This can happen when the voltage on VBAT drops below the
|
||||
* brown-out detection level while main power is absent.
|
||||
*/
|
||||
VBAT_STATUS_BBBOD,
|
||||
|
||||
/**
|
||||
* \brief A failure was detected on the oscillator.
|
||||
*
|
||||
* The oscillator stopped for at least TBD period of time and because of that
|
||||
* we can not rely on the RTC time any more.
|
||||
*
|
||||
* \todo Determine minimum period for detection of oscillator outage.
|
||||
*/
|
||||
VBAT_STATUS_XOSCFAIL,
|
||||
|
||||
};
|
||||
|
||||
enum vbat_status_code rtc_vbat_system_check (bool first_time_init);
|
||||
|
||||
/**
|
||||
* \brief Callback definition for alarm callback
|
||||
*
|
||||
* \param time The time of the alarm
|
||||
*/
|
||||
typedef void (*rtc_callback_t) (uint32_t time);
|
||||
|
||||
void rtc_set_callback (rtc_callback_t callback);
|
||||
void rtc_set_time (uint32_t time);
|
||||
uint32_t rtc_get_time (void);
|
||||
void rtc_set_alarm (uint32_t time);
|
||||
bool rtc_alarm_has_triggered (void);
|
||||
|
||||
/**
|
||||
* \brief Set alarm relative to current time
|
||||
*
|
||||
* \param offset Offset to current time. This is minimum value, so the alarm
|
||||
* might happen at up to one time unit later. See also \ref
|
||||
* rtc32_min_alarm_time
|
||||
*/
|
||||
static inline void
|
||||
rtc_set_alarm_relative (uint32_t offset)
|
||||
{
|
||||
Assert (offset >= 2);
|
||||
|
||||
rtc_set_alarm (rtc_get_time () + offset);
|
||||
}
|
||||
|
||||
void rtc_init (void);
|
||||
|
||||
//! @}
|
||||
|
||||
/**
|
||||
* \page xmega_rtc32_quickstart Quick start guide for RTC32 driver
|
||||
*
|
||||
* This is the quick start guide for the \ref rtc32_group "RTC32 driver", with
|
||||
* step-by-step instructions on how to configure and use the drivers in a
|
||||
* selection of use cases.
|
||||
*
|
||||
* The use cases contain several code fragments. The code fragments in the
|
||||
* steps for setup can be copied into a custom initialization function, while
|
||||
* the steps for usage can be copied into, e.g., the main application function.
|
||||
*
|
||||
* \section rtc32_basic_use_case Basic use case
|
||||
*
|
||||
* \section rtc32_basic_use_case_setup Setup steps
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_setup_code Example code
|
||||
* Add to the initialization code:
|
||||
* \code
|
||||
* sysclk_init();
|
||||
* rtc_init();
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_setup_flow Workflow
|
||||
* -# Ensure that conf_rtc.h is present for the driver.
|
||||
* - \note This configuration file is used by the driver and
|
||||
* should not be included by the user.
|
||||
* -# Initialize system clock:
|
||||
* - \code sysclk_init(); \endcode
|
||||
* -# Call RTC32 driver's own init function to initialize the 32kHz oscillator
|
||||
* and RTC32:
|
||||
* - \code rtc_init(); \endcode
|
||||
*
|
||||
* \section rtc32_basic_use_case_usage Usage steps
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_usage_code Example code
|
||||
* Add to, e.g., main loop in application C-file:
|
||||
* \code
|
||||
* rtc_get_time();
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_usage_flow Workflow
|
||||
* -# Get current time of the RTC32:
|
||||
* - \code rtc_get_time(); \endcode
|
||||
*
|
||||
* \section rtc32_use_cases Advanced use cases
|
||||
* For more advanced use of the RTC32 driver, see the following use cases:
|
||||
* - \subpage rtc32_use_case_1 :
|
||||
*/
|
||||
|
||||
/**
|
||||
* \page rtc32_use_case_1 Use case #1
|
||||
*
|
||||
* This use case shows how to set an alarm for the RTC32.
|
||||
*
|
||||
* \section rtc32_use_case_1_setup Setup steps
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_setup_prereq Prerequisites
|
||||
* For the setup code of this use case to work, the following must
|
||||
* be added to the project:
|
||||
* -# PMIC for interrupt handling.
|
||||
* -# Sleep Manager.
|
||||
* -# A \ref rtc_callback_t "callback" function, called alarm, that
|
||||
* reschedules the alarm must be provided
|
||||
* by the user.
|
||||
* \code
|
||||
* static void alarm(uint32_t time)
|
||||
* {
|
||||
* rtc_set_alarm(2);
|
||||
* }
|
||||
* \endcode
|
||||
* \note Since the next alarm will be rounded up to the next second pass, this
|
||||
* will actually happen in 3 seconds.
|
||||
*
|
||||
* \subsection rtc32_use_case_1_setup_code Example code
|
||||
* Add to application initialization:
|
||||
* \code
|
||||
* pmic_init();
|
||||
* sysclk_init();
|
||||
* sleepmgr_init();
|
||||
* rtc_init();
|
||||
* rtc_set_callback(alarm);
|
||||
* cpu_irq_enable();
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_use_case_1_setup_flow Workflow
|
||||
* -# Ensure that conf_rtc32.h is present for the driver.
|
||||
* - \note This configuration file is used by the driver and
|
||||
* should not be included by the user.
|
||||
* -# Call the init function of the PMIC driver to enable all interrupt levels:
|
||||
* - \code pmic_init(); \endcode
|
||||
* -# Initialize system clock:
|
||||
* - \code sysclk_init(); \endcode
|
||||
* -# Call the init function of the sleep manager driver to be able to sleep
|
||||
* waiting for alarm:
|
||||
* - \code sleepmgr_init(); \endcode
|
||||
* -# Call RTC32 driver's own init function to initialize the 32kHz oscillator
|
||||
* and RTC32:
|
||||
* - \code rtc_init(); \endcode
|
||||
* -# Set callback function to call on alarm:
|
||||
* - \code rtc_set_callback(alarm); \endcode
|
||||
* - \note The callback function alarm must be defined by the user.
|
||||
* -# Enable interrupts globally:
|
||||
* - \code cpu_irq_enable(); \endcode
|
||||
*
|
||||
* \section rtc32_use_case_1_usage Usage steps
|
||||
*
|
||||
* \subsection rtc32_use_case_1_usage_code Example code
|
||||
* \code
|
||||
* rtc_set_alarm_relative(3);
|
||||
* while (true) {
|
||||
* sleepmgr_enter_sleep();
|
||||
* }
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_use_case_1_usage_flow Workflow
|
||||
* -# Set the alarm to trigger on next time unit roll over:
|
||||
* - \code rtc_set_alarm_relative(3); \endcode
|
||||
* \note The lowest value which is safe to use is 3. The use of 2 could
|
||||
* happen in a second change, and we would not get an interrupt. A
|
||||
* value of 3 causes the alarm to be set of in 3-4 seconds.
|
||||
* -# Sleep between each triggered alarm:
|
||||
* - \code
|
||||
* while (true) {
|
||||
* sleepmgr_enter_sleep();
|
||||
* }
|
||||
* \endcode
|
||||
*/
|
||||
|
||||
#endif /* DRIVERS_RTC32_RTC32_H */
|
||||
/**
|
||||
* \file
|
||||
*
|
||||
* \brief AVR XMEGA 32-bit Real Time Counter driver definitions
|
||||
*
|
||||
* Copyright (c) 2010-2012 Atmel Corporation. All rights reserved.
|
||||
*
|
||||
* \asf_license_start
|
||||
*
|
||||
* \page License
|
||||
*
|
||||
* 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. The name of Atmel may not be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* 4. This software may only be redistributed and used in connection with an
|
||||
* Atmel microcontroller product.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
|
||||
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
|
||||
*
|
||||
* \asf_license_stop
|
||||
*
|
||||
*/
|
||||
#ifndef DRIVERS_RTC32_RTC32_H
|
||||
#define DRIVERS_RTC32_RTC32_H
|
||||
|
||||
#include <compiler.h>
|
||||
#include <conf_rtc32.h>
|
||||
|
||||
/**
|
||||
* \defgroup rtc32_group 32-bit Real Time Counter (RTC32)
|
||||
*
|
||||
* See \ref xmega_rtc32_quickstart.
|
||||
*
|
||||
* This is a driver implementation for the XMEGA RTC32.
|
||||
*
|
||||
* This driver can be used to keep track of time; setting alarms, with or
|
||||
* without function callbacks; initializing and checking the battery backup
|
||||
* system.
|
||||
*
|
||||
* \section rtc32_min_alarm_time Minimum allowed alarm time
|
||||
*
|
||||
* Due to the RTC32 clock synchronization, there is a minimum alarm time that
|
||||
* will generate a interrupt. This minimum time is 2 RTC32 clock cycles.
|
||||
*
|
||||
* Also, if a new RTC32 clock cycle is imminent at the time of setting the
|
||||
* alarm, there is a risk that it will be missed even with the value 2. If there
|
||||
* is a risk that this may occur, it is recommended to use a minimum alarm time
|
||||
* of 3.
|
||||
*
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \def CONFIG_RTC32_COMPARE_INT_LEVEL
|
||||
* \brief Configuration symbol for interrupt level to use on alarm
|
||||
*
|
||||
* Define this in \ref conf_rtc32.h as the desired interrupt level, or leave it
|
||||
* undefined to use the default.
|
||||
*/
|
||||
#ifdef __DOXYGEN__
|
||||
# define CONFIG_RTC32_COMPARE_INT_LEVEL
|
||||
#endif
|
||||
|
||||
/**
|
||||
* \def CONFIG_RTC32_CLOCK_1024HZ
|
||||
* \brief Configuration symbol for selecting 1024Hz clock instead of 1Hz
|
||||
*
|
||||
* Define this in \ref conf_rtc32.h if 1024Hz clock is desired. Otherwise, leave
|
||||
* it undefined.
|
||||
*/
|
||||
#ifdef __DOXYGEN__
|
||||
# define CONFIG_RTC32_CLOCK_1024HZ
|
||||
#endif
|
||||
|
||||
//! \brief Battery backup system status codes
|
||||
enum vbat_status_code
|
||||
{
|
||||
/**
|
||||
* \brief Backup system is operating and no errors were detected.
|
||||
*
|
||||
* The backup system is configured and had no issues while main power was
|
||||
* lost. Hence, all data stored in the backup domain is valid.
|
||||
*/
|
||||
VBAT_STATUS_OK,
|
||||
|
||||
/**
|
||||
* \brief No power detected on VBAT.
|
||||
*
|
||||
* No power was detected on the VBAT pin and therefore all data within the
|
||||
* backup system is invalid.
|
||||
*
|
||||
* The voltage on the VBAT pin is only sampled after a POR of the device,
|
||||
* therefore it is not possible to detect any voltage loss on the VBAT pin
|
||||
* during normal operation of the device.
|
||||
*/
|
||||
VBAT_STATUS_NO_POWER,
|
||||
|
||||
/**
|
||||
* \brief The backup system must be initialized.
|
||||
*
|
||||
* A POR was detected on VBAT input, indicating that a supply was connected to
|
||||
* the VBAT pin. Since this is also the first start-up of the device, it is
|
||||
* necessary to initialize the RTC32.
|
||||
*/
|
||||
VBAT_STATUS_INIT,
|
||||
|
||||
/**
|
||||
* \brief A POR was detected on the VBAT input.
|
||||
*
|
||||
* POR detection also works while the VBAT system is powered from main power,
|
||||
* but the detection flag is only latched after a POR of the main system.
|
||||
* A POR can happen when the power is lost and restored again on the VBAT pin
|
||||
* while main power was also not present, or even when main power was present,
|
||||
* but in this case the flag will only be latched after the next POR of the main
|
||||
* system.
|
||||
* If a POR is detected on VBAT, it should always be treated as if the backup
|
||||
* system is in an unknown state, i.e., that all data is invalid.
|
||||
*/
|
||||
VBAT_STATUS_BBPOR,
|
||||
|
||||
/**
|
||||
* \brief A brown-out was detected on the VBAT input.
|
||||
*
|
||||
* The backup system is in an unknown state and therefore the time in the RTC32
|
||||
* is invalid. This can happen when the voltage on VBAT drops below the
|
||||
* brown-out detection level while main power is absent.
|
||||
*/
|
||||
VBAT_STATUS_BBBOD,
|
||||
|
||||
/**
|
||||
* \brief A failure was detected on the oscillator.
|
||||
*
|
||||
* The oscillator stopped for at least TBD period of time and because of that
|
||||
* we can not rely on the RTC time any more.
|
||||
*
|
||||
* \todo Determine minimum period for detection of oscillator outage.
|
||||
*/
|
||||
VBAT_STATUS_XOSCFAIL,
|
||||
|
||||
};
|
||||
|
||||
enum vbat_status_code rtc_vbat_system_check (bool first_time_init);
|
||||
|
||||
/**
|
||||
* \brief Callback definition for alarm callback
|
||||
*
|
||||
* \param time The time of the alarm
|
||||
*/
|
||||
typedef void (*rtc_callback_t) (uint32_t time);
|
||||
|
||||
void rtc_set_callback (rtc_callback_t callback);
|
||||
void rtc_set_time (uint32_t time);
|
||||
uint32_t rtc_get_time (void);
|
||||
void rtc_set_alarm (uint32_t time);
|
||||
bool rtc_alarm_has_triggered (void);
|
||||
|
||||
/**
|
||||
* \brief Set alarm relative to current time
|
||||
*
|
||||
* \param offset Offset to current time. This is minimum value, so the alarm
|
||||
* might happen at up to one time unit later. See also \ref
|
||||
* rtc32_min_alarm_time
|
||||
*/
|
||||
static inline void
|
||||
rtc_set_alarm_relative (uint32_t offset)
|
||||
{
|
||||
Assert (offset >= 2);
|
||||
|
||||
rtc_set_alarm (rtc_get_time () + offset);
|
||||
}
|
||||
|
||||
void rtc_init (void);
|
||||
|
||||
//! @}
|
||||
|
||||
/**
|
||||
* \page xmega_rtc32_quickstart Quick start guide for RTC32 driver
|
||||
*
|
||||
* This is the quick start guide for the \ref rtc32_group "RTC32 driver", with
|
||||
* step-by-step instructions on how to configure and use the drivers in a
|
||||
* selection of use cases.
|
||||
*
|
||||
* The use cases contain several code fragments. The code fragments in the
|
||||
* steps for setup can be copied into a custom initialization function, while
|
||||
* the steps for usage can be copied into, e.g., the main application function.
|
||||
*
|
||||
* \section rtc32_basic_use_case Basic use case
|
||||
*
|
||||
* \section rtc32_basic_use_case_setup Setup steps
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_setup_code Example code
|
||||
* Add to the initialization code:
|
||||
* \code
|
||||
* sysclk_init();
|
||||
* rtc_init();
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_setup_flow Workflow
|
||||
* -# Ensure that conf_rtc.h is present for the driver.
|
||||
* - \note This configuration file is used by the driver and
|
||||
* should not be included by the user.
|
||||
* -# Initialize system clock:
|
||||
* - \code sysclk_init(); \endcode
|
||||
* -# Call RTC32 driver's own init function to initialize the 32kHz oscillator
|
||||
* and RTC32:
|
||||
* - \code rtc_init(); \endcode
|
||||
*
|
||||
* \section rtc32_basic_use_case_usage Usage steps
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_usage_code Example code
|
||||
* Add to, e.g., main loop in application C-file:
|
||||
* \code
|
||||
* rtc_get_time();
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_usage_flow Workflow
|
||||
* -# Get current time of the RTC32:
|
||||
* - \code rtc_get_time(); \endcode
|
||||
*
|
||||
* \section rtc32_use_cases Advanced use cases
|
||||
* For more advanced use of the RTC32 driver, see the following use cases:
|
||||
* - \subpage rtc32_use_case_1 :
|
||||
*/
|
||||
|
||||
/**
|
||||
* \page rtc32_use_case_1 Use case #1
|
||||
*
|
||||
* This use case shows how to set an alarm for the RTC32.
|
||||
*
|
||||
* \section rtc32_use_case_1_setup Setup steps
|
||||
*
|
||||
* \subsection rtc32_basic_use_case_setup_prereq Prerequisites
|
||||
* For the setup code of this use case to work, the following must
|
||||
* be added to the project:
|
||||
* -# PMIC for interrupt handling.
|
||||
* -# Sleep Manager.
|
||||
* -# A \ref rtc_callback_t "callback" function, called alarm, that
|
||||
* reschedules the alarm must be provided
|
||||
* by the user.
|
||||
* \code
|
||||
* static void alarm(uint32_t time)
|
||||
* {
|
||||
* rtc_set_alarm(2);
|
||||
* }
|
||||
* \endcode
|
||||
* \note Since the next alarm will be rounded up to the next second pass, this
|
||||
* will actually happen in 3 seconds.
|
||||
*
|
||||
* \subsection rtc32_use_case_1_setup_code Example code
|
||||
* Add to application initialization:
|
||||
* \code
|
||||
* pmic_init();
|
||||
* sysclk_init();
|
||||
* sleepmgr_init();
|
||||
* rtc_init();
|
||||
* rtc_set_callback(alarm);
|
||||
* cpu_irq_enable();
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_use_case_1_setup_flow Workflow
|
||||
* -# Ensure that conf_rtc32.h is present for the driver.
|
||||
* - \note This configuration file is used by the driver and
|
||||
* should not be included by the user.
|
||||
* -# Call the init function of the PMIC driver to enable all interrupt levels:
|
||||
* - \code pmic_init(); \endcode
|
||||
* -# Initialize system clock:
|
||||
* - \code sysclk_init(); \endcode
|
||||
* -# Call the init function of the sleep manager driver to be able to sleep
|
||||
* waiting for alarm:
|
||||
* - \code sleepmgr_init(); \endcode
|
||||
* -# Call RTC32 driver's own init function to initialize the 32kHz oscillator
|
||||
* and RTC32:
|
||||
* - \code rtc_init(); \endcode
|
||||
* -# Set callback function to call on alarm:
|
||||
* - \code rtc_set_callback(alarm); \endcode
|
||||
* - \note The callback function alarm must be defined by the user.
|
||||
* -# Enable interrupts globally:
|
||||
* - \code cpu_irq_enable(); \endcode
|
||||
*
|
||||
* \section rtc32_use_case_1_usage Usage steps
|
||||
*
|
||||
* \subsection rtc32_use_case_1_usage_code Example code
|
||||
* \code
|
||||
* rtc_set_alarm_relative(3);
|
||||
* while (true) {
|
||||
* sleepmgr_enter_sleep();
|
||||
* }
|
||||
* \endcode
|
||||
*
|
||||
* \subsection rtc32_use_case_1_usage_flow Workflow
|
||||
* -# Set the alarm to trigger on next time unit roll over:
|
||||
* - \code rtc_set_alarm_relative(3); \endcode
|
||||
* \note The lowest value which is safe to use is 3. The use of 2 could
|
||||
* happen in a second change, and we would not get an interrupt. A
|
||||
* value of 3 causes the alarm to be set of in 3-4 seconds.
|
||||
* -# Sleep between each triggered alarm:
|
||||
* - \code
|
||||
* while (true) {
|
||||
* sleepmgr_enter_sleep();
|
||||
* }
|
||||
* \endcode
|
||||
*/
|
||||
|
||||
#endif /* DRIVERS_RTC32_RTC32_H */
|
||||
|
||||
Reference in New Issue
Block a user