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Hello, all I am now doing a program to test my module design and I use ISE6.2 under windows XP. I synthesize the top-level design and modules with XST(under windows mode). When synthesizing top-level file, I selected “Add I/O buffer”, and deselecting it when synthesizing modules file. Then I use command mode to implement them. It looks o.k. when I do “ ngdbuild –modular initial….” And “ngdbuild –modular module –active module ….” But when I use map command to this active module A, the following message appears.
Writing file test_map.ngm… n Waring : Line numbe 0: Found and unexpected XMODULE_CELLTYPE property on frag T_b1. … … …(The same warings to all top-level ports) Runing directed packing… Running delay-based LUT packing… Running related packing… FATAL_ERROR : Ncd : nc_isetfactory_imp.c:738:1.22.4.1 – Active module interfaces are missing. Process will terminate.
And there is the same problem when I doing the previous xapp290 example under the same situation.
Another question is I add some constrains attribute in VHDL code (i.e. attribute iob : string; attribute iob of LED_A_out : signal is "true";) but it dose nothing.
Could anyone give me some ideas about these problems? Thank you very much.
luyi |