小弟刚接手DDR2与SPARTAN3A的板子,现在用MIG3.6.1生成了DDR2的CORE,但是我在ISE中建立工程并将EXAMPLE/RTL中所有文件和PAR中.ucf导入工程中进行编译,在TRANSLATE时出现如下错误:ConstraintSystem:59 - Constraint <INST
"infrastructure_top0/cal_top0/tap_dly0" AREA_GROUP = cal_ctl;>
[F:/ddr2_sdram/ddr2_sdram/vhdl/vhdl_bl4/example_design/par/vhdl_bl4.ucf(277)]
: INST "infrastructure_top0/cal_top0/tap_dly0" not found. Please verify
that:
1. The specified design element actually exists in the original design.
2. The specified object is spelled correctly in the constraint source file.
该错误大量出现,小弟对UCF内的限制不熟悉,请问高手,这个问题是怎么回事?怎么解决? |