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stm32 added better RTC periph API functions 

Originally tracked at https://github.com/libopencm3/libopencm3/pull/1319
This commit is contained in:
Bastian de Byl 2021-03-08 01:19:40 -05:00 committed by Karl Palsson
parent dc6ebac841
commit 0d72e6739c
4 changed files with 245 additions and 2 deletions
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27
include/libopencm3/stm32/common/rtc_common_l1f024.h
View File

@ -426,6 +426,15 @@ specific memorymap.h header before including this header file.*/
#define RTC_ALRMXSSR_SS_SHIFT (0)
#define RTC_ALARXSSR_SS_MASK (0x7fff)
enum rtc_weekday {
RTC_DR_WDU_MON = 0x01,
RTC_DR_WDU_TUE,
RTC_DR_WDU_WED,
RTC_DR_WDU_THU,
RTC_DR_WDU_FRI,
RTC_DR_WDU_SAT,
RTC_DR_WDU_SUN,
};
BEGIN_DECLS
@ -435,6 +444,24 @@ void rtc_lock(void);
void rtc_unlock(void);
void rtc_set_wakeup_time(uint16_t wkup_time, uint8_t rtc_cr_wucksel);
void rtc_clear_wakeup_flag(void);
void rtc_set_init_flag(void);
void rtc_clear_init_flag(void);
bool rtc_init_flag_is_ready(void);
void rtc_wait_for_init_ready(void);
void rtc_set_bypass_shadow_register(void);
void rtc_enable_bypass_shadow_register(void);
void rtc_disable_bypass_shadow_register(void);
void rtc_set_am_format(void);
void rtc_set_pm_format(void);
void rtc_calendar_set_year(uint8_t year);
void rtc_calendar_set_weekday(enum rtc_weekday rtc_dr_wdu);
void rtc_calendar_set_month(uint8_t month);
void rtc_calendar_set_day(uint8_t day);
void rtc_calendar_set_date(uint8_t year, uint8_t month, uint8_t day, enum rtc_weekday rtc_dr_wdu);
void rtc_time_set_hour(uint8_t hour, bool use_am_notation);
void rtc_time_set_minute(uint8_t minute);
void rtc_time_set_second(uint8_t second);
void rtc_time_set_time(uint8_t hour, uint8_t minute, uint8_t second, bool use_am_notation);
END_DECLS
/**@}*/

4
include/libopencm3/stm32/f0/rcc.h
View File

@ -538,8 +538,8 @@ enum rcc_periph_rst {
RST_DAC1 = _REG_BIT(0x10, 29), /* Compatibility alias */
RST_CEC = _REG_BIT(0x10, 30),
/* Advanced peripherals */
RST_BACKUPDOMAIN = _REG_BIT(0x20, 16),/* BDCR[16] */
/* Backup domain control */
RST_BDCR = _REG_BIT(0x20, 16),/* BDCR[16] */
/* AHB peripherals */
RST_GPIOA = _REG_BIT(0x28, 17),

3
include/libopencm3/stm32/f4/rcc.h
View File

@ -1092,6 +1092,9 @@ enum rcc_periph_rst {
RST_SAI1RST = _REG_BIT(0x24, 22),/* F42x, F43x */
RST_LTDC = _REG_BIT(0x24, 26),/* F42x, F43x */
RST_DSI = _REG_BIT(0x24, 27),/* F42x, F43x */
/* Backup domain control */
RST_BDCR = _REG_BIT(0x70, 16),/* BDCR[16] */
};
#undef _REG_BIT

213
lib/stm32/common/rtc_common_l1f024.c
View File

@ -28,6 +28,11 @@
#include <libopencm3/stm32/rtc.h>
static uint8_t _rtc_dec_to_bcd(uint8_t dec)
{
return ((dec / 10) << 4) | (dec % 10);
}
/*---------------------------------------------------------------------------*/
/** @brief Set RTC prescalars.
@ -122,4 +127,212 @@ void rtc_clear_wakeup_flag(void)
RTC_ISR &= ~RTC_ISR_WUTF;
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the initialization flag
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
void rtc_set_init_flag(void)
{
RTC_ISR |= RTC_ISR_INIT;
}
/*---------------------------------------------------------------------------*/
/** @brief Clears (resets) the initialization flag
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
void rtc_clear_init_flag(void)
{
RTC_ISR &= ~RTC_ISR_INIT;
}
/*---------------------------------------------------------------------------*/
/** @brief Returns if the RTC_ISR init flag RTC_ISR_INITF is set
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
bool rtc_init_flag_is_ready(void)
{
return (RTC_ISR & RTC_ISR_INITF);
}
/*---------------------------------------------------------------------------*/
/** @brief Waits infinitely for initialization flag to be set in RTC_ISR
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
void rtc_wait_for_init_ready(void)
{
while (!rtc_init_flag_is_ready());
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the bypass shadow bit in RTC_CR
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
void rtc_enable_bypass_shadow_register(void)
{
RTC_CR |= RTC_CR_BYPSHAD;
}
/*---------------------------------------------------------------------------*/
/** @brief Clears the bypass shadow bit in RTC_CR
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
void rtc_disable_bypass_shadow_register(void)
{
RTC_CR &= ~RTC_CR_BYPSHAD;
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC control register hour format to AM (24h)
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
void rtc_set_am_format(void)
{
RTC_CR &= ~RTC_CR_FMT;
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC control register hour format to PM (12h)
@details Requires unlocking backup domain write protection (PWR_CR_DBP)
*/
void rtc_set_pm_format(void)
{
RTC_CR |= RTC_CR_FMT;
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD calendar year value
@details Requires unlocking the RTC write-protection (RTC_WPR)
The year value should only be the abbreviated year tens, meaning if 2021 is
desired pass in only 21.
*/
void rtc_calendar_set_year(uint8_t year)
{
uint8_t bcd_year = _rtc_dec_to_bcd(year);
RTC_DR &= ~(RTC_DR_YT_MASK << RTC_DR_YT_SHIFT | RTC_DR_YU_MASK << RTC_DR_YU_SHIFT);
RTC_DR |= (((bcd_year >> 4) & RTC_DR_YT_MASK) << RTC_DR_YT_SHIFT) |
((bcd_year & RTC_DR_YU_MASK) << RTC_DR_YU_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD calendar weekday
@details Requires unlocking the RTC write-protection (RTC_WPR)
*/
void rtc_calendar_set_weekday(enum rtc_weekday rtc_dr_wdu)
{
RTC_DR &= ~(RTC_DR_WDU_MASK << RTC_DR_WDU_SHIFT);
RTC_DR |= (rtc_dr_wdu << RTC_DR_WDU_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD calendar month value
@details Requires unlocking the RTC write-protection (RTC_WPR)
*/
void rtc_calendar_set_month(uint8_t month)
{
uint8_t bcd_month = _rtc_dec_to_bcd(month);
RTC_DR &= ~(RTC_DR_MT_MASK << RTC_DR_MT_SHIFT | RTC_DR_MU_MASK << RTC_DR_MU_SHIFT);
RTC_DR |= (((bcd_month >> 4) & RTC_DR_MT_MASK) << RTC_DR_MT_SHIFT) |
((bcd_month & RTC_DR_MU_MASK) << RTC_DR_MU_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD calendar day value
@details Requires unlocking the RTC write-protection (RTC_WPR)
*/
void rtc_calendar_set_day(uint8_t day)
{
uint8_t bcd_day = _rtc_dec_to_bcd(day);
RTC_DR &= ~(RTC_DR_DT_MASK << RTC_DR_DT_SHIFT | RTC_DR_DU_MASK << RTC_DR_DU_SHIFT);
RTC_DR |= (((bcd_day >> 4) & RTC_DR_DT_MASK) << RTC_DR_DT_SHIFT) |
((bcd_day & RTC_DR_DU_MASK) << RTC_DR_DU_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD calendar value
@details Requires unlocking the RTC write-protection (RTC_WPR)
The year value should only be the abbreviated year tens, meaning if 2021 is
desired pass in only 21.
*/
void rtc_calendar_set_date(uint8_t year, uint8_t month, uint8_t day, enum rtc_weekday rtc_dr_wdu)
{
rtc_calendar_set_year(year);
rtc_calendar_set_month(month);
rtc_calendar_set_weekday(rtc_dr_wdu);
rtc_calendar_set_day(day);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD time hour value
@details Requires unlocking the RTC write-protection (RTC_WPR)
Pass true to use_am_notation to use 24-hour input time; pass false to
use_am_notation to use 12-hour (AM/PM) input time
*/
void rtc_time_set_hour(uint8_t hour, bool use_am_notation)
{
if (use_am_notation) {
RTC_TR &= ~(RTC_TR_PM);
} else {
RTC_TR |= RTC_TR_PM;
}
uint8_t bcd_hour = _rtc_dec_to_bcd(hour);
RTC_TR &= ~(RTC_TR_HT_MASK << RTC_TR_HT_SHIFT | RTC_TR_HU_MASK << RTC_TR_HU_SHIFT);
RTC_TR |= (((bcd_hour >> 4) & RTC_TR_HT_MASK) << RTC_TR_HT_SHIFT) |
((bcd_hour & RTC_TR_HU_MASK) << RTC_TR_HU_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD time minute value
@details Requires unlocking the RTC write-protection (RTC_WPR)
*/
void rtc_time_set_minute(uint8_t minute)
{
uint8_t bcd_minute = _rtc_dec_to_bcd(minute);
RTC_TR &= ~(RTC_TR_MNT_MASK << RTC_TR_MNT_SHIFT | RTC_TR_MNU_MASK << RTC_TR_MNU_SHIFT);
RTC_TR |= (((bcd_minute >> 4) & RTC_TR_MNT_MASK) << RTC_TR_MNT_SHIFT) |
((bcd_minute & RTC_TR_MNU_MASK) << RTC_TR_MNU_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD time second value
@details Requires unlocking the RTC write-protection (RTC_WPR)
*/
void rtc_time_set_second(uint8_t second)
{
uint8_t bcd_second = _rtc_dec_to_bcd(second);
RTC_TR &= ~(RTC_TR_ST_MASK << RTC_TR_ST_SHIFT | RTC_TR_SU_MASK << RTC_TR_SU_SHIFT);
RTC_TR |= (((bcd_second >> 4) & RTC_TR_ST_MASK) << RTC_TR_ST_SHIFT) |
((bcd_second & RTC_TR_SU_MASK) << RTC_TR_SU_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Sets the RTC BCD time
@details Requires unlocking the RTC write-protection (RTC_WPR)
*/
void rtc_time_set_time(uint8_t hour, uint8_t minute, uint8_t second, bool use_am_notation)
{
rtc_time_set_hour(hour, use_am_notation);
rtc_time_set_minute(minute);
rtc_time_set_second(second);
}
/**@}*/