|
我使用了11个反相器构成回路,以形成震荡波形,所以我希望通过UCF约束将这些反相器分别对称地放在若干个slice里面。于是我写了如下约束
INST "m0" LOC=SLICE_R1C1;
INST "m1" LOC=SLICE_R2C2;
INST "m2" LOC=SLICE_R3C3;
......
但是在translate的时候就出现了如下错误:
ERROR:ConstraintSystem:59 - Constraint <INST "m0" LOC=SLICE_R1C1;> [sys.ucf(1)]:
ERROR:ConstraintSystem:59 - Constraint <INST "m1" LOC=SLICE_R2C2;> [sys.ucf(2)]:
ERROR:ConstraintSystem:59 - Constraint <INST "m2" LOC=SLICE_R3C3;> [sys.ucf(3)]:
.......
查看report显示:
ERROR:ConstraintSystem:59 - Constraint <INST "m0" LOC=CLB_R1C1;> [sys.ucf(1)]:
INST "m0" 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.
其中m0,m1...是反相器的例化名。望前辈指点 |
|