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Errors when trying to control block RAM

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EDA_hg81

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Try to control block RAM.

Get following warnings:
what I did in code just like following:

assign SUM_OUT_R = LBUFF_EN ? ADD_OUT : LBUFF_OUT;

WARNING:Xst:1426 - The value init of the FF/Latch LINEEN hinder the constant cleaning in the block Line_Buf.
WARNING:Xst:1293 - FF/Latch <BUWREN> has a constant value of 0 in block <Line_Buf>.

What this means?

Thank you.
 

questions

Maybe you should post your module that controls the block RAM.
 

Re: questions

I have put my code in this post.
 

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