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RTC: Fix system time initialization when using an exernal RTC. Fix some bugs in the DS1307/DS3231 RTC driver

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This commit is contained in:
Gregory Nutt 2015-11-19 14:54:30 -06:00
parent 1c86c004c4
commit c34b5108a7
7 changed files with 172 additions and 103 deletions
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2
configs

@ -1 +1 @@
Subproject commit 165837ff2aa39c6cb478223c0b1bbec4a42dadc6
Subproject commit 388caf63466f447ce0fc6924dc50e79b9ba70cf8

21
drivers/timers/Kconfig
View File

@ -118,16 +118,31 @@ config RTC_IOCTL
endif # RTC_DRIVER
config RTC_DS3XXX
config RTC_EXTERNAL
bool "External RTC Support"
default n
---help---
In modern MCUs, the RTC is usually implement as an internal
peripheral to the MCU. An option is to use an external RTC
connected to the MCU typically via SPI or I2C.
If an external RTC is connect to the MCU through some bus, then the
RTC will not be available to the system until after the system
fully boots up and is able to access the bus. In that case, this
setting must be included to suppress attempts to initialize the RTC
early in the boot sequence.
config RTC_DSXXXX
bool "DS3231/DS1307 RTC Driver"
default n
select I2C
select I2C_TRANSFER
select RTC_EXTERNAL
select RTC_DATETIME
---help---
Enables support for the Maxim Integrated DS3231 I2C RTC timer.
if RTC_DS3XXX
if RTC_DSXXXX
choice
prompt "Maxim Integrated RTC"
@ -150,7 +165,7 @@ config DS3231_I2C_FREQUENCY
default 400000
range 1 4000000
endif # RTC_DS3XXX
endif # RTC_DSXXXX
endif # RTC
menuconfig WATCHDOG

2
drivers/timers/Make.defs
View File

@ -51,7 +51,7 @@ ifeq ($(CONFIG_TIMER),y)
TMRVPATH = :timers
endif
ifeq ($(CONFIG_RTC_DS3XXX),y)
ifeq ($(CONFIG_RTC_DSXXXX),y)
CSRCS += ds3231.c
TMRDEPPATH = --dep-path timers
TMRVPATH = :timers

93
drivers/timers/ds3231.c
View File

@ -50,7 +50,7 @@
#include "ds3231.h"
#ifdef CONFIG_RTC_DS3XXX
#ifdef CONFIG_RTC_DSXXXX
/************************************************************************************
* Pre-processor Definitions
@ -192,7 +192,7 @@ static uint8_t rtc_bin2bcd(int value)
}
/************************************************************************************
* Name: rtc_bin2bcd
* Name: rtc_bcd2bin
*
* Description:
* Convert from 2 digit BCD to binary.
@ -216,13 +216,13 @@ static int rtc_bcd2bin(uint8_t value)
************************************************************************************/
/************************************************************************************
* Name: ds3xxx_rtc_initialize
* Name: dsxxxx_rtc_initialize
*
* Description:
* Initialize the hardware RTC per the selected configuration. This function is
* called once during the OS initialization sequence by board-specific logic.
*
* After ds3xxx_rtc_initialize() is called, the OS function clock_synchronize()
* After dsxxxx_rtc_initialize() is called, the OS function clock_synchronize()
* should also be called to synchronize the system timer to a hardware RTC. That
* operation is normally performed automatically by the system during clock
* initialization. However, when an external RTC is used, the board logic will
@ -237,7 +237,7 @@ static int rtc_bcd2bin(uint8_t value)
*
************************************************************************************/
int ds3xxx_rtc_initialize(FAR struct i2c_dev_s *i2c)
int dsxxxx_rtc_initialize(FAR struct i2c_dev_s *i2c)
{
/* Remember the i2c device and claim that the RTC is enabled */
@ -278,9 +278,31 @@ int up_rtc_getdatetime(FAR struct tm *tp)
int tmp;
int ret;
/* If this function is called before the RTC has been initialized (and it will be),
* then just return the data/time of the epoch, 12:00 am, Jan 1, 1970.
*/
if (!g_rtc_enabled)
{
tp->tm_sec = 0;
tp->tm_min = 0;
tp->tm_hour = 0;
#if defined(CONFIG_LIBC_LOCALTIME) || defined(CONFIG_TIME_EXTENDED)
/* Jan 1, 1970 was a Thursday */
tp->tm_wday = 4;
#endif
tp->tm_mday = 1;
tp->tm_mon = 0;
tp->tm_year = 70;
return -EAGAIN;
}
/* Select to begin reading at the seconds register */
secaddr = DS3XXX_TIME_SECR;
secaddr = DSXXXX_TIME_SECR;
msg[0].addr = DS3231_I2C_ADDRESS;
msg[0].flags = 0;
@ -326,40 +348,42 @@ int up_rtc_getdatetime(FAR struct tm *tp)
return ret;
}
}
while (buffer[0] > seconds);
while ((buffer[0] & DSXXXX_TIME_SEC_BCDMASK) >
(seconds & DSXXXX_TIME_SEC_BCDMASK));
/* Format the return time */
/* Return seconds (0-61) */
tp->tm_sec = rtc_bcd2bin(buffer[0] & DS3XXX_TIME_SEC_BCDMASK);
tp->tm_sec = rtc_bcd2bin(buffer[0] & DSXXXX_TIME_SEC_BCDMASK);
/* Return minutes (0-59) */
tp->tm_min = rtc_bcd2bin(buffer[1] & DS3XXX_TIME_MIN_BCDMASK);
tp->tm_min = rtc_bcd2bin(buffer[1] & DSXXXX_TIME_MIN_BCDMASK);
/* Return hour (0-23). This assumes 24-hour time was set. */
tp->tm_hour = rtc_bcd2bin(buffer[2] & DS3XXX_TIME_HOUR24_BCDMASK);
tp->tm_hour = rtc_bcd2bin(buffer[2] & DSXXXX_TIME_HOUR24_BCDMASK);
#if defined(CONFIG_LIBC_LOCALTIME) || defined(CONFIG_TIME_EXTENDED)
/* Return the day of the week (0-6) */
tp->tm_wday = (rtc_bcd2bin(buffer[3]) & DS3XXX_TIME_DAY_MASK) - 1;
tp->tm_wday = (rtc_bcd2bin(buffer[3]) & DSXXXX_TIME_DAY_MASK) - 1;
#endif
/* Return the day of the month (1-31) */
tp->tm_mday = rtc_bcd2bin(buffer[4] & DS3XXX_TIME_DATE_BCDMASK);
tp->tm_mday = rtc_bcd2bin(buffer[4] & DSXXXX_TIME_DATE_BCDMASK);
/* Return the month (0-11) */
tp->tm_mon = rtc_bcd2bin(buffer[5] & DS3XXX_TIME_MONTH_BCDMASK) - 1;
tp->tm_mon = rtc_bcd2bin(buffer[5] & DSXXXX_TIME_MONTH_BCDMASK) - 1;
/* Return the years since 1990 */
/* Return the years since 1900 */
tmp = rtc_bcd2bin(buffer[5] & DS3XXX_TIME_YEAR_BCDMASK);
tmp = rtc_bcd2bin(buffer[6] & DSXXXX_TIME_YEAR_BCDMASK);
if ((buffer[6] & DS3XXX_TIME_CENTURY_MASK) == DS3XXX_TIME_1900)
#ifdef CONFIG_RTC_DS3231
if ((buffer[5] & DS3231_TIME_CENTURY_MASK) == DS3231_TIME_1900)
{
tp->tm_year = tmp;
}
@ -367,6 +391,11 @@ int up_rtc_getdatetime(FAR struct tm *tp)
{
tp->tm_year = tmp + 100;
}
#else
/* No century indicator. The RTC will hold years since 1970 */
tp->tm_year = tmp + 70;
#endif
rtc_dumptime(tp, "Returning");
return OK;
@ -398,6 +427,15 @@ int up_rtc_settime(FAR const struct timespec *tp)
uint8_t year;
int ret;
/* If this function is called before the RTC has been initialized then just return
* an error.
*/
if (!g_rtc_enabled)
{
return -EAGAIN;
}
rtc_dumptime(tp, "Setting time");
/* Get the broken out time */
@ -429,7 +467,7 @@ int up_rtc_settime(FAR const struct timespec *tp)
/* Construct the message */
/* Write starting with the seconds regiser */
buffer[0] = DS3XXX_TIME_SECR;
buffer[0] = DSXXXX_TIME_SECR;
/* Save seconds (0-59) converted to BCD */
@ -441,7 +479,7 @@ int up_rtc_settime(FAR const struct timespec *tp)
/* Save hour (0-23) with 24-hour time indicatin */
buffer[3] = rtc_bin2bcd(newtm.tm_hour) | DS3XXX_TIME_24;
buffer[3] = rtc_bin2bcd(newtm.tm_hour) | DSXXXX_TIME_24;
/* Save the day of the week (1-7) */
@ -455,30 +493,38 @@ int up_rtc_settime(FAR const struct timespec *tp)
buffer[5] = rtc_bin2bcd(newtm.tm_mday);
#ifdef CONFIG_RTC_DS3231
/* Handle years in the 20th vs the 21st century */
if (newtm.tm_year < 100)
{
/* Convert years in the range 1900-1999 */
century = DS3XXX_TIME_1900;
century = DS3231_TIME_1900;
year = newtm.tm_year;
}
else
{
/* Convert years in the range 2000-2099 */
century = DS3XXX_TIME_2000;
century = DS3231_TIME_2000;
year = newtm.tm_year - 100;
}
#else
/* Use years since 1970 */
century = 0;
year = newtm.tm_year - 70;
#endif
/* Save the month (1-12) with century */
buffer[6] = rtc_bin2bcd(newtm.tm_mon + 1) | century;
/* Save the year */
buffer[7] = year;
buffer[7] = rtc_bin2bcd(year);
/* Setup the I2C message */
@ -517,9 +563,10 @@ int up_rtc_settime(FAR const struct timespec *tp)
return ret;
}
}
while (buffer[1] > seconds);
while ((buffer[1] & DSXXXX_TIME_SEC_BCDMASK) >
(seconds & DSXXXX_TIME_SEC_BCDMASK));
return OK;
}
#endif /* CONFIG_RTC_DS3XXX */
#endif /* CONFIG_RTC_DSXXXX */

141
drivers/timers/ds3231.h
View File

@ -46,80 +46,85 @@
* Pre-processor Definitions
****************************************************************************/
#define DS3XXX_TIME_SECR 0x00 /* Seconds register */
# define DS3XXX_TIME_SEC_SHIFT 0 /* Bits 0-3: Seconds, range 0-9 */
# define DS3XXX_TIME_SEC_MASK (15 << DS3XXX_TIME_SEC_SHIFT)
# define DS3XXX_TIME_SEC(n) ((uint8_t)(n) << DS3XXX_TIME_SEC_SHIFT)
# define DS3XXX_TIME_10SEC_SHIFT 4 /* Bits 4-6: 10 seconds, range 0-5 */
# define DS3XXX_TIME_10SEC_MASK (7 << DS3XXX_TIME_10SEC_SHIFT)
# define DS3XXX_TIME_10SEC(n) ((uint8_t)(n) << DS3XXX_TIME_10SEC_SHIFT)
# define DS3XXX_TIME_SEC_BCDMASK (DS3XXX_TIME_SEC_MASK | DS3XXX_TIME_10SEC_MASK)
#define DSXXXX_TIME_SECR 0x00 /* Seconds register */
# define DSXXXX_TIME_SEC_SHIFT 0 /* Bits 0-3: Seconds, range 0-9 */
# define DSXXXX_TIME_SEC_MASK (15 << DSXXXX_TIME_SEC_SHIFT)
# define DSXXXX_TIME_SEC(n) ((uint8_t)(n) << DSXXXX_TIME_SEC_SHIFT)
# define DSXXXX_TIME_10SEC_SHIFT 4 /* Bits 4-6: 10 seconds, range 0-5 */
# define DSXXXX_TIME_10SEC_MASK (7 << DSXXXX_TIME_10SEC_SHIFT)
# define DSXXXX_TIME_10SEC(n) ((uint8_t)(n) << DSXXXX_TIME_10SEC_SHIFT)
# define DSXXXX_TIME_SEC_BCDMASK (DSXXXX_TIME_SEC_MASK | DSXXXX_TIME_10SEC_MASK)
#ifdef CONFIG_RTC_DS1307
# define DS1307_TIME_CH (1 << 7) /* Bit 7: Clock halt */
#endif
#define DS3XXX_TIME_MINR 0x01 /* Minutes register */
# define DS3XXX_TIME_MIN_SHIFT 0 /* Bits 0-3: Minutes, range 0-9 */
# define DS3XXX_TIME_MIN_MASK (15 << DS3XXX_TIME_MIN_SHIFT)
# define DS3XXX_TIME_MIN(n) ((uint8_t)(n) << DS3XXX_TIME_MIN_SHIFT)
# define DS3XXX_TIME_10MIN_SHIFT 4 /* Bits 4-6: 10 minutes, range 0-5 */
# define DS3XXX_TIME_10MIN_MASK (7 << DS3XXX_TIME_10MIN_SHIFT)
# define DS3XXX_TIME_10MIN(n) ((uint8_t)(n) << DS3XXX_TIME_10MIN_SHIFT)
# define DS3XXX_TIME_MIN_BCDMASK (DS3XXX_TIME_MIN_MASK | DS3XXX_TIME_10MIN_MASK)
#define DSXXXX_TIME_MINR 0x01 /* Minutes register */
# define DSXXXX_TIME_MIN_SHIFT 0 /* Bits 0-3: Minutes, range 0-9 */
# define DSXXXX_TIME_MIN_MASK (15 << DSXXXX_TIME_MIN_SHIFT)
# define DSXXXX_TIME_MIN(n) ((uint8_t)(n) << DSXXXX_TIME_MIN_SHIFT)
# define DSXXXX_TIME_10MIN_SHIFT 4 /* Bits 4-6: 10 minutes, range 0-5 */
# define DSXXXX_TIME_10MIN_MASK (7 << DSXXXX_TIME_10MIN_SHIFT)
# define DSXXXX_TIME_10MIN(n) ((uint8_t)(n) << DSXXXX_TIME_10MIN_SHIFT)
# define DSXXXX_TIME_MIN_BCDMASK (DSXXXX_TIME_MIN_MASK | DSXXXX_TIME_10MIN_MASK)
#define DS3XXX_TIME_HOURR 0x02 /* Hours register */
# define DS3XXX_TIME_HOUR_SHIFT 0 /* Bits 0-3: Hours, range 0-9 */
# define DS3XXX_TIME_HOUR_MASK (15 << DS3XXX_TIME_HOUR_SHIFT)
# define DS3XXX_TIME_HOUR(n) ((uint8_t)(n) << DS3XXX_TIME_HOUR_SHIFT)
# define DS3XXX_TIME_10HOUR12_SHIFT 4 /* Bit 4: 10 hours, range 0-1 */
# define DS3XXX_TIME_10HOUR12_MASK (1 << DS3XXX_TIME_10HOUR12_SHIFT)
# define DS3XXX_TIME_10HOUR12(n) ((uint8_t)(n) << DS3XXX_TIME_10HOUR12_SHIFT)
# define DS3XXX_TIME_10HOUR24_SHIFT 4 /* Bits 4-5: 10 hours, range 0-2 */
# define DS3XXX_TIME_10HOUR24_MASK (3 << DS3XXX_TIME_10HOUR24_SHIFT)
# define DS3XXX_TIME_10HOUR24(n) ((uint8_t)(n) << DS3XXX_TIME_10HOUR24_SHIFT)
# define DS3XXX_TIME_HOUR12_BCDMASK (DS3XXX_TIME_HOUR_MASK | DS3XXX_TIME_10HOUR12_MASK)
# define DS3XXX_TIME_HOUR24_BCDMASK (DS3XXX_TIME_HOUR_MASK | DS3XXX_TIME_10HOUR24_MASK)
# define DS3XXX_TIME_AMPM_SHIFT 5 /* Bit 5: AM/PM Indication */
# define DS3XXX_TIME_AMPM_MASK (1 << DS3XXX_TIME_AMPM_SHIFT)
# define DS3XXX_TIME_AM ((uint8_t)(0) << DS3XXX_TIME_AMPM_SHIFT)
# define DS3XXX_TIME_PM ((uint8_t)(1) << DS3XXX_TIME_AMPM_SHIFT)
# define DS3XXX_TIME_1224_SHIFT 6 /* Bit 6: 12/24 Indication */
# define DS3XXX_TIME_1224_MASK (1 << DS3XXX_TIME_1224_SHIFT)
# define DS3XXX_TIME_24 ((uint8_t)(0) << DS3XXX_TIME_1224_SHIFT)
# define DS3XXX_TIME_12 ((uint8_t)(1) << DS3XXX_TIME_1224_SHIFT)
#define DSXXXX_TIME_HOURR 0x02 /* Hours register */
# define DSXXXX_TIME_HOUR_SHIFT 0 /* Bits 0-3: Hours, range 0-9 */
# define DSXXXX_TIME_HOUR_MASK (15 << DSXXXX_TIME_HOUR_SHIFT)
# define DSXXXX_TIME_HOUR(n) ((uint8_t)(n) << DSXXXX_TIME_HOUR_SHIFT)
# define DSXXXX_TIME_10HOUR12_SHIFT 4 /* Bit 4: 10 hours, range 0-1 */
# define DSXXXX_TIME_10HOUR12_MASK (1 << DSXXXX_TIME_10HOUR12_SHIFT)
# define DSXXXX_TIME_10HOUR12(n) ((uint8_t)(n) << DSXXXX_TIME_10HOUR12_SHIFT)
# define DSXXXX_TIME_10HOUR24_SHIFT 4 /* Bits 4-5: 10 hours, range 0-2 */
# define DSXXXX_TIME_10HOUR24_MASK (3 << DSXXXX_TIME_10HOUR24_SHIFT)
# define DSXXXX_TIME_10HOUR24(n) ((uint8_t)(n) << DSXXXX_TIME_10HOUR24_SHIFT)
# define DSXXXX_TIME_HOUR12_BCDMASK (DSXXXX_TIME_HOUR_MASK | DSXXXX_TIME_10HOUR12_MASK)
# define DSXXXX_TIME_HOUR24_BCDMASK (DSXXXX_TIME_HOUR_MASK | DSXXXX_TIME_10HOUR24_MASK)
# define DSXXXX_TIME_AMPM_SHIFT 5 /* Bit 5: AM/PM Indication */
# define DSXXXX_TIME_AMPM_MASK (1 << DSXXXX_TIME_AMPM_SHIFT)
# define DSXXXX_TIME_AM ((uint8_t)(0) << DSXXXX_TIME_AMPM_SHIFT)
# define DSXXXX_TIME_PM ((uint8_t)(1) << DSXXXX_TIME_AMPM_SHIFT)
# define DSXXXX_TIME_1224_SHIFT 6 /* Bit 6: 12/24 Indication */
# define DSXXXX_TIME_1224_MASK (1 << DSXXXX_TIME_1224_SHIFT)
# define DSXXXX_TIME_24 ((uint8_t)(0) << DSXXXX_TIME_1224_SHIFT)
# define DSXXXX_TIME_12 ((uint8_t)(1) << DSXXXX_TIME_1224_SHIFT)
#define DS3XXX_TIME_DAYR 0x03 /* Day of the week register */
# define DS3XXX_TIME_DAY_SHIFT 0 /* Bits 0-3: Day of the week, range 1-7 */
# define DS3XXX_TIME_DAY_MASK (7 << DS3XXX_TIME_DAY_SHIFT)
# define DS3XXX_TIME_DAY(n) ((uint8_t)(n) << DS3XXX_TIME_DAY_SHIFT)
#define DSXXXX_TIME_DAYR 0x03 /* Day of the week register */
# define DSXXXX_TIME_DAY_SHIFT 0 /* Bits 0-3: Day of the week, range 1-7 */
# define DSXXXX_TIME_DAY_MASK (7 << DSXXXX_TIME_DAY_SHIFT)
# define DSXXXX_TIME_DAY(n) ((uint8_t)(n) << DSXXXX_TIME_DAY_SHIFT)
#define DS3XXX_TIME_DATER 0x04 /* Date register */
# define DS3XXX_TIME_DATE_SHIFT 0 /* Bits 0-3: Days, range 0-9 */
# define DS3XXX_TIME_DATE_MASK (15 << DS3XXX_TIME_DATE_SHIFT)
# define DS3XXX_TIME_DATE(n) ((uint8_t)(n) << DS3XXX_TIME_DATE_SHIFT)
# define DS3XXX_TIME_10DATE_SHIFT 4 /* Bits 4-5: 10 days, range 0-5 */
# define DS3XXX_TIME_10DATE_MASK (3 << DS3XXX_TIME_10DATE_SHIFT)
# define DS3XXX_TIME_10DATE(n) ((uint8_t)(n) << DS3XXX_TIME_10DATE_SHIFT)
# define DS3XXX_TIME_DATE_BCDMASK (DS3XXX_TIME_DATE_MASK | DS3XXX_TIME_10DATE_MASK)
#define DSXXXX_TIME_DATER 0x04 /* Date register */
# define DSXXXX_TIME_DATE_SHIFT 0 /* Bits 0-3: Days, range 0-9 */
# define DSXXXX_TIME_DATE_MASK (15 << DSXXXX_TIME_DATE_SHIFT)
# define DSXXXX_TIME_DATE(n) ((uint8_t)(n) << DSXXXX_TIME_DATE_SHIFT)
# define DSXXXX_TIME_10DATE_SHIFT 4 /* Bits 4-5: 10 days, range 0-5 */
# define DSXXXX_TIME_10DATE_MASK (3 << DSXXXX_TIME_10DATE_SHIFT)
# define DSXXXX_TIME_10DATE(n) ((uint8_t)(n) << DSXXXX_TIME_10DATE_SHIFT)
# define DSXXXX_TIME_DATE_BCDMASK (DSXXXX_TIME_DATE_MASK | DSXXXX_TIME_10DATE_MASK)
#define DS3XXX_TIME_MONTHR 0x05 /* Month register */
# define DS3XXX_TIME_MONTH_SHIFT 0 /* Bits 0-3: Month, range 0-9 */
# define DS3XXX_TIME_MONTH_MASK (15 << DS3XXX_TIME_MONTH_SHIFT)
# define DS3XXX_TIME_MONTH(n) ((uint8_t)(n) << DS3XXX_TIME_MONTH_SHIFT)
# define DS3XXX_TIME_10MONTH_SHIFT 4 /* Bit 4: 10 month, range 0-1 */
# define DS3XXX_TIME_10MONTH_MASK (1 << DS3XXX_TIME_10MONTH_SHIFT)
# define DS3XXX_TIME_10MONTH(n) ((uint8_t)(n) << DS3XXX_TIME_10MONTH_SHIFT)
# define DS3XXX_TIME_MONTH_BCDMASK (DS3XXX_TIME_MONTH_MASK | DS3XXX_TIME_10MONTH_MASK)
# define DS3XXX_TIME_CENTURY_SHIFT 7 /* Bit 7: AM/PM Indication */
# define DS3XXX_TIME_CENTURY_MASK (1 << DS3XXX_TIME_CENTURY_SHIFT)
# define DS3XXX_TIME_1900 ((uint8_t)(0) << DS3XXX_TIME_CENTURY_SHIFT)
# define DS3XXX_TIME_2000 ((uint8_t)(1) << DS3XXX_TIME_CENTURY_SHIFT)
#define DSXXXX_TIME_MONTHR 0x05 /* Month register */
# define DSXXXX_TIME_MONTH_SHIFT 0 /* Bits 0-3: Month, range 0-9 */
# define DSXXXX_TIME_MONTH_MASK (15 << DSXXXX_TIME_MONTH_SHIFT)
# define DSXXXX_TIME_MONTH(n) ((uint8_t)(n) << DSXXXX_TIME_MONTH_SHIFT)
# define DSXXXX_TIME_10MONTH_SHIFT 4 /* Bit 4: 10 month, range 0-1 */
# define DSXXXX_TIME_10MONTH_MASK (1 << DSXXXX_TIME_10MONTH_SHIFT)
# define DSXXXX_TIME_10MONTH(n) ((uint8_t)(n) << DSXXXX_TIME_10MONTH_SHIFT)
# define DSXXXX_TIME_MONTH_BCDMASK (DSXXXX_TIME_MONTH_MASK | DSXXXX_TIME_10MONTH_MASK)
#ifdef CONFIG_RTC_DS3231
# define DS3231_TIME_CENTURY_SHIFT 7 /* Bit 7: Century Indication */
# define DS3231_TIME_CENTURY_MASK (1 << DS3231_TIME_CENTURY_SHIFT)
# define DS3231_TIME_1900 ((uint8_t)(0) << DS3231_TIME_CENTURY_SHIFT)
# define DS3231_TIME_2000 ((uint8_t)(1) << DS3231_TIME_CENTURY_SHIFT)
#endif
#define DS3XXX_TIME_YEARR 0x06 /* Date register */
# define DS3XXX_TIME_YEAR_SHIFT 0 /* Bits 0-3: Year, range 0-9 */
# define DS3XXX_TIME_YEAR_MASK (15 << DS3XXX_TIME_YEAR_SHIFT)
# define DS3XXX_TIME_YEAR(n) ((uint8_t)(n) << DS3XXX_TIME_YEAR_SHIFT)
# define DS3XXX_TIME_10YEAR_SHIFT 4 /* Bits 4-7: 10 year, range 0-9 */
# define DS3XXX_TIME_10YEAR_MASK (15 << DS3XXX_TIME_10YEAR_SHIFT)
# define DS3XXX_TIME_10YEAR(n) ((uint8_t)(n) << DS3XXX_TIME_10YEAR_SHIFT)
# define DS3XXX_TIME_YEAR_BCDMASK (DS3XXX_TIME_YEAR_MASK | DS3XXX_TIME_10YEAR_MASK)
#define DSXXXX_TIME_YEARR 0x06 /* Date register */
# define DSXXXX_TIME_YEAR_SHIFT 0 /* Bits 0-3: Year, range 0-9 */
# define DSXXXX_TIME_YEAR_MASK (15 << DSXXXX_TIME_YEAR_SHIFT)
# define DSXXXX_TIME_YEAR(n) ((uint8_t)(n) << DSXXXX_TIME_YEAR_SHIFT)
# define DSXXXX_TIME_10YEAR_SHIFT 4 /* Bits 4-7: 10 year, range 0-9 */
# define DSXXXX_TIME_10YEAR_MASK (15 << DSXXXX_TIME_10YEAR_SHIFT)
# define DSXXXX_TIME_10YEAR(n) ((uint8_t)(n) << DSXXXX_TIME_10YEAR_SHIFT)
# define DSXXXX_TIME_YEAR_BCDMASK (DSXXXX_TIME_YEAR_MASK | DSXXXX_TIME_10YEAR_MASK)
#ifdef CONFIG_RTC_DS1307
# define DS1307_CR 0x07 /* Control register */

10
include/nuttx/timers/ds3231.h
View File

@ -42,7 +42,7 @@
#include <nuttx/config.h>
#ifdef CONFIG_RTC_DS3XXX
#ifdef CONFIG_RTC_DSXXXX
/****************************************************************************
* Public Function Prototypes
@ -57,13 +57,13 @@ extern "C"
#endif
/************************************************************************************
* Name: ds3xxx_rtc_initialize
* Name: dsxxxx_rtc_initialize
*
* Description:
* Initialize the hardware RTC per the selected configuration. This function is
* called once during the OS initialization sequence by board-specific logic.
*
* After ds3xxx_rtc_initialize() is called, the OS function clock_synchronize()
* After dsxxxx_rtc_initialize() is called, the OS function clock_synchronize()
* should also be called to synchronize the system timer to a hardware RTC. That
* operation is normally performed automatically by the system during clock
* initialization. However, when an external RTC is used, the board logic will
@ -79,12 +79,12 @@ extern "C"
************************************************************************************/
struct i2c_dev_s; /* Forward reference */
int ds3xxx_rtc_initialize(FAR struct i2c_dev_s *i2c);
int dsxxxx_rtc_initialize(FAR struct i2c_dev_s *i2c);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* CONFIG_RTC_DS3XXX */
#endif /* CONFIG_RTC_DSXXXX */
#endif /* __INCLUDE_NUTTX_TIMERS_DS3231_H */

6
sched/clock/clock_initialize.c
View File

@ -201,9 +201,11 @@ static void clock_inittime(void)
void clock_initialize(void)
{
/* Initialize the RTC hardware */
/* Initialize the internal RTC hardware. Initialization of external RTC
* must be deferred until the system has booted.
*/
#ifdef CONFIG_RTC
#if defined(CONFIG_RTC) && !defined(CONFIG_RTC_EXTERNAL)
up_rtcinitialize();
#endif