Answers Database
M1.5: Constraints Editor: ERROR:bascp:47 - Invalid UCF/NCF file entry value detected while reading UCF.
Record #5352
Product Family: Software
Product Line: M1 Implementation
Product Part: Constraints Editor
Product Version: 1.5
Problem Title:
M1.5: Constraints Editor: ERROR:bascp:47 - Invalid UCF/NCF file entry value detected while
reading UCF.
Problem Description:
Urgency: Standard
General Description: NGDBUILD issues the following error
ERROR:bascp:47 - Invalid UCF/NCF file entry value detected while reading UCF.
This error message can be the result of a UCF file written by the Constraint
Editor. If the ngd file, read into Constraint Editor, contains the following:
NET "CLK" TNM = "CLK";
TIMESPEC TS_CLK = PERIOD : "CLK": 25 : HIGH : 50%;
The Constraint Editor will translate this constraint incorrectly. In the Source
Constraints Tab (read-only) the following constraint will be displayed:
INST "CLK.PAD" TNM = "CLK";
TIMESPEC "TS_CLK" = PERIOD "CLK" 25000.000 ps LOW;
50% missing and the HIGH keyword has changed to LOW.
This results in the following constraint being written to the ucf file:
TIMESPEC "TS_CLK" = PERIOD "CLK" 25000.000000 ps LOW;
This constraint with error in ngdbuild.
Solution 1:
To resolve this issue open the UCF file in a text editor and make the following
changes:
Change the LOW to HIGH.
Add the 50%.
Here is the corrected constraint:
TIMESPEC TS_CLK = PERIOD : "CLK": 25 : HIGH : 50%;
End of Record #5352 - Last Modified: 05/26/99 14:06 |
