152 lines
4.3 KiB
C
152 lines
4.3 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIBOPENCM3_RTC_H
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#define LIBOPENCM3_RTC_H
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#include <libopencm3/stm32/memorymap.h>
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#include <libopencm3/cm3/common.h>
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#include <libopencm3/stm32/pwr.h>
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#include <libopencm3/stm32/f1/rcc.h>
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/* --- RTC registers ------------------------------------------------------- */
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/* RTC control register high (RTC_CRH) */
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#define RTC_CRH MMIO32(RTC_BASE + 0x00)
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/* RTC control register low (RTC_CRL) */
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#define RTC_CRL MMIO32(RTC_BASE + 0x04)
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/* RTC prescaler load register (RTC_PRLH / RTC_PRLL) */
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#define RTC_PRLH MMIO32(RTC_BASE + 0x08)
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#define RTC_PRLL MMIO32(RTC_BASE + 0x0c)
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/* RTC prescaler divider register (RTC_DIVH / RTC_DIVL) */
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#define RTC_DIVH MMIO32(RTC_BASE + 0x10)
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#define RTC_DIVL MMIO32(RTC_BASE + 0x14)
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/* RTC counter register (RTC_CNTH / RTC_CNTL) */
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#define RTC_CNTH MMIO32(RTC_BASE + 0x18)
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#define RTC_CNTL MMIO32(RTC_BASE + 0x1c)
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/* RTC alarm register high (RTC_ALRH / RTC_ALRL) */
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#define RTC_ALRH MMIO32(RTC_BASE + 0x20)
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#define RTC_ALRL MMIO32(RTC_BASE + 0x24)
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/* --- RTC_CRH values -------------------------------------------------------*/
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/* Note: Bits [15:3] are reserved, and forced to 0 by hardware. */
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/* OWIE: Overflow interrupt enable */
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#define RTC_CRH_OWIE (1 << 2)
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/* ALRIE: Alarm interrupt enable */
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#define RTC_CRH_ALRIE (1 << 1)
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/* SECIE: Second interrupt enable */
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#define RTC_CRH_SECIE (1 << 0)
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/* --- RTC_CRL values -------------------------------------------------------*/
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/* Note: Bits [15:6] are reserved, and forced to 0 by hardware. */
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/* RTOFF: RTC operation OFF */
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#define RTC_CRL_RTOFF (1 << 5)
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/* CNF: Configuration flag */
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#define RTC_CRL_CNF (1 << 4)
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/* RSF: Registers synchronized flag */
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#define RTC_CRL_RSF (1 << 3)
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/* OWF: Overflow flag */
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#define RTC_CRL_OWF (1 << 2)
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/* ALRF: Alarm flag */
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#define RTC_CRL_ALRF (1 << 1)
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/* SECF: Second flag */
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#define RTC_CRL_SECF (1 << 0)
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/* --- RTC_PRLH values ------------------------------------------------------*/
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/* Note: Bits [15:4] are reserved, and forced to 0 by hardware. */
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/* TODO */
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/* --- RTC_PRLL values ------------------------------------------------------*/
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/* TODO */
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/* --- RTC_DIVH values ------------------------------------------------------*/
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/* Bits [15:4] are reserved. */
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/* TODO */
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/* --- RTC_DIVL values ------------------------------------------------------*/
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/* TODO */
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/* --- RTC_CNTH values ------------------------------------------------------*/
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/* TODO */
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/* --- RTC_CNTL values ------------------------------------------------------*/
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/* TODO */
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/* --- RTC_ALRH values ------------------------------------------------------*/
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/* TODO */
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/* --- RTC_ALRL values ------------------------------------------------------*/
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/* TODO */
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/* --- Function prototypes --------------------------------------------------*/
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typedef enum {
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RTC_SEC, RTC_ALR, RTC_OW,
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} rtcflag_t;
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BEGIN_DECLS
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void rtc_awake_from_off(osc_t clock_source);
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void rtc_enter_config_mode(void);
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void rtc_exit_config_mode(void);
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void rtc_set_alarm_time(u32 alarm_time);
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void rtc_enable_alarm(void);
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void rtc_disable_alarm(void);
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void rtc_set_prescale_val(u32 prescale_val);
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u32 rtc_get_counter_val(void);
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u32 rtc_get_prescale_div_val(void);
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u32 rtc_get_alarm_val(void);
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void rtc_set_counter_val(u32 counter_val);
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void rtc_interrupt_enable(rtcflag_t flag_val);
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void rtc_interrupt_disable(rtcflag_t flag_val);
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void rtc_clear_flag(rtcflag_t flag_val);
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u32 rtc_check_flag(rtcflag_t flag_val);
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void rtc_awake_from_standby(void);
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void rtc_auto_awake(osc_t clock_source, u32 prescale_val);
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END_DECLS
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#endif
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