ERROR message: Resolution function required

[snakyfactory]

error: resolution function required for the net

Hi everybody,

I just get started with FPGA design...

I wanna build a booth multiplier with the algorithm found in wikipedia.

My code was completed, but ISE give me an error message when I try to simulate it...

it is

ERROR: Resolution function required for the Net /TB_boothv6/UUT/count_aux driven by:
/TB_boothv6/UUT//booth_v6.vhd:booth_multiplier
/TB_boothv6/UUT//booth_v6.vhd:States


Wht's the problem is tht??

p.s. count_aux is one of my internal signal, it's for the counter.

 

[Nikolai]

resolution function required

Your internal signal may be driven by two or more sources. In such a case an arbiter is needed to decide which signal to assert on the bus/wire. In VHDL this is done by defining a resolution function.

Refer any decent VHDL reference book for more details.

 

[snakyfactory]

vhdl resolution function

icic~

im now reading samples on resolution function, shall be all right.

Thx ~