RTC Time Reset on Due Restart about arduino-due-rtc-library HOT 12 OPEN

Yes I know, there are 2 problems at this piont.

1. The Due has no Backupbatterie so there will no data's stored if he is powerless.
2. The Due does reset with the NRSTB pin. This resets the full chip with all backup regions including RTC, RTT and SC. Only if the reset is done with the NRST pin will these regions stay with their old values. And the value what you get then is the startvalue of the register, everytime

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OK, I thought it was something I was doing wrong in the sketch! Thanks for putting this library together, and I'll look for changes in the future!

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If I do
rtc_clock.set_clock(0, 0);

then the year is printing as 2070 instead of 1970. I am using Arduino IDE 1.6.4.

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Did you want to set an unixtime oder date and time from compiler?

Can you post the complete sketch?

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I want to set unitTime (0). When I start the code, it will check to sync
with time from the internet. If not reachable, I want to to set it as
unitTime 0, which should be the 1970 year, etc.

I doubt that it has something to do with SECONDS_FROM_1970_TO_2000

Bcz if I set the time 946684800, the year shows ok as 2000, but if I set it
as 946684799, the year shows as 2099 instead of 1999.

Avarachan

On Sat, Jun 20, 2015 at 1:08 PM, MarkusLange [email protected]
wrote:

Did you want to set an unixtime oder date and time from compiler?

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#4 (comment)
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Can I get the complete sketch

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I am playing with one of your example sketches
Due_RTC_Simple_Sample_oneline_time_and_date.ino
https://github.com/MarkusLange/Arduino-Due-RTC-Library/blob/master/examples/Due_RTC_Simple_Sample_oneline_time_and_date/Due_RTC_Simple_Sample_oneline_time_and_date.ino

My tests

void setup() {
Serial.begin(115200);
rtc_clock.init();
//rtc_clock.set_clock(DATE, TIME);
//rtc_clock.set_clock(0,0);
//rtc_clock.set_clock(946684799,0);
rtc_clock.set_clock(946684800,0);
}

Avarachan

On Sat, Jun 20, 2015 at 2:37 PM, MarkusLange [email protected]
wrote:

Can I get the complete sketch

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#4 (comment)
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Ah I understand, yes you are right, I will rewrite it so that so that it works without the define SECONDS_FROM_1970_TO_2000 that it will count the ticks from the 1.01.1970 to the actuall date, so that every date from the start of the unixtime will shown correct.

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New version up should work for you purpose

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Downloaded the new lib, and tested (same as my previous post). rtc_clock.set_clock(0,0) still prints 2070.

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I will take a closer look at the end of the week, may I need to seperate there something with set_clock you can set ntp and unixtime looks like it doesn't work the way I want

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Bckup battery

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