CCS/EK-TM4C129EXL: code for RTC for output on display BoosterPack MKII

user5319192

Part Number: EK-TM4C129EXL

Tool/software: Code Composer Studio

Hey folks,

EK-TM4C129EXL

I'm looking for an implementation of an RTC. I have the DS3231 RTC from Maxim Integrated that I would like to get running and display time on our connected display (BoosterPack MKII). Does anybody have experience with that and a code?

thanks in advance!

best regards!

over 7 years ago

0 Bob Crosby over 7 years ago

TI__Guru 72500 points

I am not aware of any such examples from TI. Perhaps a community member has such an example, but it is unlikely as the EK-TM4C129EXL launchpad already has a RTC module.

0 user5319192 over 7 years ago in reply to Bob Crosby

Prodigy 220 points

okay, thank you for the information!
do you happen to have/ or is there a code for the RTC module on the EK-TM4C129EXL?

Best regards

0 Bob Crosby over 7 years ago in reply to user5319192

TI__Guru 72500 points

If you have downloaded the latest version of TivaWare, look at the example in:
C:\ti\TivaWare_C_Series-2.1.4.178\examples\boards\ek-tm4c129exl\hibernate

0 user5319192 over 7 years ago in reply to Bob Crosby

Prodigy 220 points

Thank you, I will check it out!
Best regards

0 user5319192 over 7 years ago in reply to Bob Crosby

Prodigy 220 points

I read that an external crystal (32,768 kHz) is required, is that true?

0 Bob Crosby over 7 years ago in reply to user5319192

TI__Guru 72500 points

Yes, for accurate time keeping in hibernate mode the 32.768 KHz crystal is required. The EK-TM4C129EXL launchpad has one installed.

0 user5319192 over 7 years ago in reply to Bob Crosby

Prodigy 220 points

Okay, well I just would like to output the time every couple seconds on our display BoosterPack MKII. It does not have to super accurate since we do not run the µC for long intervalls periods.

I just need a simple time output, so do I still need that crystal or what do you mean by the EK-TM4C129EXL launchpad has one installed?

thanks for the support!

Best regards!

0 Bob Crosby over 7 years ago in reply to user5319192

TI__Guru 72500 points

Here is a snippet of the schematic for the EK-TM4C129EXL showing the 32KHz crystal connection, followed by a picture of the crystal on the board.

Arm-based microcontrollers

Arm-based microcontrollers forum

CCS/EK-TM4C129EXL: code for RTC for output on display BoosterPack MKII