another ALU problem


Posted by Chris Taylor , May 01,1999,20:41 Post Reply  Forum

I am using the ADSU8;1. When I verify my schematic, I get the following message...

"U:project\veribest_final\design_definition\graphics\DataPath.sbk(1):Warning, Pin 'CI' at <-3200,2050> on Symbol XCMP8 at <-3200,1350>: Unconnected symbol pin.
Verify complete: 0 error(s) 1 warning(s)"

If I ignore the message, I get an following error when I attempt to simulate the circuit...

"-------------------
244: CI => open,
^^^^
[Error] Illegal unconnected element: formal port CI has no default value

78: CI : in std_logic;
^^
Formal port CI has no default value: it cannot be unconnected...

-------------------
293:
^
[Failure] End of compilation: error(s) in design unit DATAPATH"

I have tried tying the CI pin to ground. I get the following error when I compile the schematic for simulation, when I have tied CI to ground...

"-------------------
244: CI => GND,
^^^
[Error] Mismatch between type IEEE.STD_LOGIC_1164.STD_ULOGIC of formal port CI and type IEEE.STD_LOGIC_1164.STD_LOGIC_VECTOR of actual

78: CI : in std_logic;
^^
Formal port CI is associated with actual of different type...

-------------------
293:
^
[Failure] End of compilation: error(s) in design unit DATAPATH"

What is going on here? How can I get the simulator to compile my schematic?

--Chris


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