PCF2129T

[niyathihere4u]

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.

[TomasVaverka]

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

[niyathishenoyk]

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.