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configure LSE for RTC on a STM32F4DISCOVERY board.

Question asked by gallucci.carmelo on Jan 1, 2015
Latest reply on Jan 5, 2015 by waclawek.jan
Hello, hapy 2015 to all.
I try to use an external LSE for RTC a STM32F4DISCOVERY .
I follow indication of clive1 on this post:

https://my.st.com/public/STe2ecommunities/mcu/Lists/STM32Discovery/Flat.aspx?RootFolder=https%3a%2f%2fmy.st.com%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fSTM32Discovery%2fUsing%20LSE%20for%20RTC%20on%20a%20STM32F4DISCOVERY%20board&FolderCTID=0x01200200770978C69A1141439FE559EB459D75800084C20D8867EAD444A5987D47BE638E0F&currentviews=1814

Component i used are:
http://it.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=-4&urlRequestType=Base&partNumber=2101354&storeId=10165

http://it.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=-4&urlRequestType=Base&partNumber=2332630&storeId=10165

Problem is that the RTC_Config function  is nont able to get the LSE ready and don't  retriev correct flag SET.

/* Wait till LSE is ready */
        while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}

I checked connection and they sems ok.

Anyone have suggestion to sort out ? what can i do?

Regards,

Carmelo

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