WARNING:Xst:2677 - Node <ad_d_4> of sequential type is unconnected in block <DDS>.
WARNING:Xst:1895 - Due to other FF/Latch trimming, FF/Latch <odata1_2> (without init value) has a constant value of 0 in block <V_measure>.
WARNING:Xst:2734 - Property "use_dsp48" is not applicable for this technology.
WARNING:Xst:2211 - "D:/example/scan/dds.vhd" line 58: Instantiating black box module <sin>.


关键词：警告    求助    

这些警告都需要解决呢。。。。。