Kernel gets hang without RTC battery

Francis Kumar

Other Parts Discussed in Thread: AM1808

Hi All,

I am using AM1808 and booting the Kernel and Application via SD-Card. I am using RTC for time stamp. AM1808 has internal RTC which we have given the CMOS battery for

RTC backup. i.e CR2032 battery one. But I am worried about battery back is not coming for 1 year. it is coming for just 4-5 months.

And also, If the CMOS battery get drain, the kernel gets hang. it shows the message:

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

After that it is not extracting the kernel. Is there any way to resolve my issue in Kernel level. Even if the battery get drain, still i need to run my system .

Please solve my issue.

Regards,

Francis

over 12 years ago

0 Renjith Thomas over 12 years ago

Guru 31670 points

Francis,

Disable your RTC driver see the behavior. If kernel is booting up, then you can go and debug RTC driver.

0 Francis Kumar over 12 years ago in reply to Renjith Thomas

Expert 1330 points

Hi,

When i disabled the RTC driver in kernel menu config. again the kernel gets hang and stands at the below :

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

the same behavior, Please suggest me, how can i resolve my issue.

Thanks,

Francis

0 Renjith Thomas over 12 years ago in reply to Francis Kumar

Guru 31670 points

Francis,

Are you using separate RTC module or on-chip RTC module? Can you share the portion of schematics where RTC battery is connected to?

Processors

Processors forum

Kernel gets hang without RTC battery