topic PCF2129T in Other NXP Products

PCF2129T

niyathihere4u — Mon, 17 Dec 2018 06:22:16 GMT

Hi,

I am using RTC PCF2129T for my application.

I was succesfully able to set time and get time with this RTC. However, when i try to set a minute alarm,the minute alarm interrupt doesn't get generated. So, i read all the 3 control registers. When i read them without any write i dont get the reset values for these registers. Also, even if i make a write to these registers, nothing gets changed.

Re: PCF2129T

TomasVaverka — Tue, 18 Dec 2018 12:12:25 GMT

Hi Niyathi,

Is is hard to say where the problem might be without seeing your code or scope shots illustrating write/read transactions on the bus.

You may find useful my example code where I also use a minute interrupt.

Best regards,

Tomas

Re: PCF2129T

niyathishenoyk — Tue, 05 Feb 2019 12:43:08 GMT

Hi Tomas,

Thank you for the sample code.Set time and get time is already working for me. I need a functionality where an alarm function is generated based on a particular time set. Also, is there some power on sequence that needs to be followed? Because after power on when i try to read the register values its supposed to give reset values,however it is giving me garbage values.I am also not able to write anything into the rtc registers.