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Refactor DS3232 RTC

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This commit is contained in:
Theo Arends 2022-03-12 17:55:17 +01:00
parent 139f6d61c4
commit eb2d65be54
1 changed files with 12 additions and 22 deletions
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34
tasmota/xsns_33_ds3231.ino
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@ -72,28 +72,18 @@
bool ds3231_detected = false;
/*********************************************************************************************/
uint8_t DS3231bcd2dec(uint8_t n) {
return n - 6 * (n >> 4);
}
uint8_t DS3231dec2bcd(uint8_t n) {
return n + 6 * (n / 10);
}
/*-------------------------------------------------------------------------------------------*\
* Read time from DS3231 and return the epoch time (second since 1-1-1970 00:00)
\*-------------------------------------------------------------------------------------------*/
uint32_t DS3231ReadTime(void) {
TIME_T tm;
tm.second = DS3231bcd2dec(I2cRead8(USE_RTC_ADDR, DS3231_SECONDS));
tm.minute = DS3231bcd2dec(I2cRead8(USE_RTC_ADDR, DS3231_MINUTES));
tm.hour = DS3231bcd2dec(I2cRead8(USE_RTC_ADDR, DS3231_HOURS) & ~_BV(DS3231_HR1224)); // Assumes 24hr clock
tm.second = Bcd2Dec(I2cRead8(USE_RTC_ADDR, DS3231_SECONDS));
tm.minute = Bcd2Dec(I2cRead8(USE_RTC_ADDR, DS3231_MINUTES));
tm.hour = Bcd2Dec(I2cRead8(USE_RTC_ADDR, DS3231_HOURS) & ~_BV(DS3231_HR1224)); // Assumes 24hr clock
tm.day_of_week = I2cRead8(USE_RTC_ADDR, DS3231_DAY);
tm.day_of_month = DS3231bcd2dec(I2cRead8(USE_RTC_ADDR, DS3231_DATE));
tm.month = DS3231bcd2dec(I2cRead8(USE_RTC_ADDR, DS3231_MONTH) & ~_BV(DS3231_CENTURY)); // Don't use the Century bit
tm.year = DS3231bcd2dec(I2cRead8(USE_RTC_ADDR, DS3231_YEAR));
tm.day_of_month = Bcd2Dec(I2cRead8(USE_RTC_ADDR, DS3231_DATE));
tm.month = Bcd2Dec(I2cRead8(USE_RTC_ADDR, DS3231_MONTH) & ~_BV(DS3231_CENTURY)); // Don't use the Century bit
tm.year = Bcd2Dec(I2cRead8(USE_RTC_ADDR, DS3231_YEAR));
return MakeTime(tm);
}
@ -103,13 +93,13 @@ uint32_t DS3231ReadTime(void) {
void DS3231SetTime (uint32_t epoch_time) {
TIME_T tm;
BreakTime(epoch_time, tm);
I2cWrite8(USE_RTC_ADDR, DS3231_SECONDS, DS3231dec2bcd(tm.second));
I2cWrite8(USE_RTC_ADDR, DS3231_MINUTES, DS3231dec2bcd(tm.minute));
I2cWrite8(USE_RTC_ADDR, DS3231_HOURS, DS3231dec2bcd(tm.hour));
I2cWrite8(USE_RTC_ADDR, DS3231_SECONDS, Dec2Bcd(tm.second));
I2cWrite8(USE_RTC_ADDR, DS3231_MINUTES, Dec2Bcd(tm.minute));
I2cWrite8(USE_RTC_ADDR, DS3231_HOURS, Dec2Bcd(tm.hour));
I2cWrite8(USE_RTC_ADDR, DS3231_DAY, tm.day_of_week);
I2cWrite8(USE_RTC_ADDR, DS3231_DATE, DS3231dec2bcd(tm.day_of_month));
I2cWrite8(USE_RTC_ADDR, DS3231_MONTH, DS3231dec2bcd(tm.month));
I2cWrite8(USE_RTC_ADDR, DS3231_YEAR, DS3231dec2bcd(tm.year));
I2cWrite8(USE_RTC_ADDR, DS3231_DATE, Dec2Bcd(tm.day_of_month));
I2cWrite8(USE_RTC_ADDR, DS3231_MONTH, Dec2Bcd(tm.month));
I2cWrite8(USE_RTC_ADDR, DS3231_YEAR, Dec2Bcd(tm.year));
I2cWrite8(USE_RTC_ADDR, DS3231_STATUS, I2cRead8(USE_RTC_ADDR, DS3231_STATUS) & ~_BV(DS3231_OSF)); // Clear the Oscillator Stop Flag
}